MULTIMEDIA UNIVERSITY FACULTY OF ENGINEERING LAB SHEET
|
|
- Lee Maxwell
- 5 years ago
- Views:
Transcription
1 MULTIMEDIA UNIVERSITY FACULTY OF ENGINEERING LAB SHEET ELECTROMAGNETIC THEORY EMF2016 MW2 IMPEDANCE MEASUREMENT AND MATCHING
2 EM Theory Faculty of Engineering, Multimedia University 2 EXPERIMENT MW2: IMPEDANCE MEASUREMENT AND MATCHING OBJECTIVES: a) To measure the normalized impedance of an unknown load. b) To perform impedance matching using a slide-screw tuner and Smith Chart. APPARATUS: Klystron Source Klystron Power Supply Isolator Slotted-line probe detector SWR measurement amplifier/meter Slide-Screw Tuner Attenuator Short-circuit Plate x 2 BNC coax cable x 1 Spanner INTRODUCTION: The ratio between the electric and the magnetic fields at a particular point along a waveguide is defined as the impedance at that point. It may be denoted as Z = E / H = R + jx. If there is no reflected wave, this ratio is the same at all points along the line. The standing wave ratio (SWR) will be unity. In this case, the load absorbs all the incident energy and is said to be matched to the characteristic impedance Z o of the waveguide. If a reflected wave is present, causing a standing wave, then the impedance will vary periodically with distance along the transmission path. It is therefore necessary to specify the plane to which the impedance is defined when measuring an unknown impedance. It can be shown that the relationship between SWR, reflection coefficient ρ, and the impedance Z at any point on the line be given by Z - Z ρ = o Z + Z o 1 + ρ SWR = 1 ρ = Z / Z o 2
3 EM Theory Faculty of Engineering, Multimedia University 3 Smith Chart (see Appendix A) is usually used to analyze the values of R and X at any distance along the transmission line. On Smith Chart, impedance values are normalized with respect to the characteristic impedance Z o. Complete circles in the chart are curves of constant resistance R/Z o. Incomplete circles which are at right angles to the complete circles are curves of constant reactance jx/z o. Thus, every point in the chart specifies a normalized impedance Z/Z o =(R+jX)/Z o. The impedances at various points along the waveguide lie on a circle with its centre at the centre of the Smith Chart. This circle is often called the circle of constant mismatch (or the SWR circle). When the load is equal to Z o, there is no mismatch and the radius of the SWR circle will be zero. The impedances at various distances from a point (where the impedance is known) can be established by moving around the SWR circle through the appropriate angles. The point where the SWR circle crosses the horizontal axis on the right-side of Smith Chart (i.e. R/Z o + j0) corresponds to a point of maximum electric field in the standing wave pattern. It also gives the VSWR, since at this point the normalized resistance value is equal to the VSWR (i.e. R/Z o = VSWR). The point at the opposite end of the horizontal diameter (on the left-side of Smith Chart) corresponds to a point of minimum electric field and has impedance Z = (1/VSWR) + j0. To measure an unknown impedance, the SWR (=S o ) of the device connected to a slotted-line waveguide and the position of one minimal point x o is determined (see Fig-1). A circle corresponds to R+j0 where R=S o is drawn on the Smith Chart. After that, the unknown device is substituted by a short circuit plate. Two successive minimum points, x 1 and x 2, are noted. Twice the distance between them is the guide wavelength λ g. One of the minimum points is used as reference. Let d = (x o - x 1 ) / λ g. The impedance at the input terminal of the unknown device can be found on the constant mismatch circle at a distance d from the point of minimum electric field towards load if d > 0; otherwise towards generator. It should be noted that the impedance along the line is equal to the load impedance at any integral number of half-wavelengths from the load. Plane of load E max 2 minimum with load, E min 2 x o d λ g / 2 x 2 x 1 Fig 1 : Illustration to Impedance Measurement. 3
4 EM Theory Faculty of Engineering, Multimedia University 4 When the load doesn t match with the transmission line impedance, the reflected energy is usually lost as heat and, in some cases, may destroy the source amplifier. It may also cause a wide variation in performance when the condition is disturbed by, for example, temperature change or signal frequency drift. Therefore, it is usually desirable that the load accepts all the RF energy or additional impedance matching network can be incorporated to the line in order to minimize the amount of energy reflected to the generator. In the case of waveguide, a slide-screw tuner which consists of a slotted waveguide section and a movable metal rod penetrating through the slot can be used for this purpose. A variable capacitive susceptance is introduced in parallel to the transmission line by varying the tuner s protrusion depth. A convenient feature of Smith Chart is that, if the normalized impedance is represented by one point Z, then the normalized admittance (reciprocal of impedance) is found by simply moving to the opposite end of the diameter through Z on the constant mismatch circle. The admittance Y = G + jb changes along the waveguide according to the values represented by the circle. A point Y 1 can be found where the conductance G is equal to the characteristic admittance Y o. If the susceptance at this point has a negative value (ie. -jb), a slide-screw tuner can be used to add a susceptance +jb in parallel with Y so that the combined susceptance will be zero and the resulting admittance Y will simply become Y o. There may be a standing wave in the waveguide section between the tuner and the load but, as far as the source generator is concerned, no part of the incident wave is reflected. 4
5 EM Theory Faculty of Engineering, Multimedia University 5 PREPARATION Conduct background study about the experiment, e.g. read the lab sheet. Bring log book for recording observations and results. Bring scientific calculator. Bring Smith Charts. Bring a pair of compasses. PROCEDURE: CAUTION 1: The RF power levels in the following experiments are not harmful, but a human eye may be damaged by low level of radiation. DO NOT LOOK INTO THE WAVEGUIDE at any time when the equipment is on. CAUTION 2: Klystron tube gets extremely HOT when it is operated and must not be handled by hand. A. Initial Setup (30 minutes) The experimental setup (see Fig. 2) is similar to the source-transmission line-load setup used in MW1. The difference being a slide-screw tuner is inserted in between the transmission line and the load. The slide-screw tuner allows a metal rod to protrude into the waveguide introducing a shunt capacitance at the point of protrusion. The shunt capacitance introduced is proportional to the depth of protrusion. It is used to perform impedance matching in this experiment. As in MW1, the SWR meter used in the setup is a power meter with SWR scales on it and it has a built-in variable gain amplifier. Power increases from the left to the right side of the scales. A primary objective of this initial setup is to tune the components for maximum signal strength at the SWR meter. This includes tuning the Klystron source s repeller voltage for maximum output power, the tuning gear and the source s modulation frequency and amplitude for maximum reception at the SWR meter. 1. Set up the equipment as shown in Fig 2. (already done by the lab technician but do verify). Caution: Make sure the SWR meter input setting is XTAL LOW. Klystron Source Isolator Slotted-line Detector Slide-screw Tuner Attenuator Klystron Power Supply SWR Meter Fig 2: Experiment Setup 5
6 EM Theory Faculty of Engineering, Multimedia University 6 2. Set the slotted-line probe s depth to 0.5 mm. 3. Set the attenuator to >2.8mm (> 20 db return loss). 4. Make sure that the SWR meter is in the normal deflection mode (set by the smaller dial at and on top of the range-gain knob). 5. Make sure that the tuning screw of the slide-screw tuner is totally out of the waveguide (micrometer setting < 0). 6. Switch on the Klystron power supply (with internal modulation active) and the SWR meter. 7. Adjust the SWR meter s gain until a significant deflection appears on the meter. 8. Adjust the repeller voltage knob for maximum reception at the SWR meter*. 9. Adjust the tuning gear of the slotted-line probe for maximum reception at the SWR meter*. 10. Adjust the modulation frequency and amplitude for maximum reception at the SWR meter*. 11. At this stage, the SWR meter should give good deflection at gain settings of 30 to 40 db. If necessary, increase the slotted-line probe s depth to achieve the stated condition. Make sure that a full deflection can be obtained by adjusting the vernier gain knob. * As one is tuning towards the maximum, the SWR meter will indicate that power is increasing. As one s tuning reaches the maximum and then moves away from the maximum, the SWR meter will indicate that power reaches a maximum and then decreases. Adjust the SWR meter s gain if necessary to have a decent deflection on the meter and to avoid overdriving the meter. Note: Do not disturb the repeller voltage, slotted-line probe s depth, and tuning gear beyond this point. Else, you might have to repeat the above. For slotted-line measurements below, make your measurements at the central part of the waveguide; avoid the two ends of the waveguide. All measurement readings have to be in the correct precision. Please make it a habit. Make your own tables of observations. Make it a habit too. Evaluation A: (cognitive knowledge, level 1) [10 marks] i. Please make sure you know all components of the setup and their functions. You may consult the lab instructor if necessary. ii. Request for evaluation when you are ready. 6
7 EM Theory Faculty of Engineering, Multimedia University 7 B. Determine the Normalised Load Impedance (50 minutes) 12. Replace the load (attenuator and short-circuit) by a short circuit plate. You need spanners; borrow them from the lab technician. Do not turn off the Klystron Power Supply. Do not look into the waveguide. Do not lose the screws. 13. Move the slotted-line probe along the waveguide to locate two successive points of minimum power. Record the positions of these two points, x 1 and x 2. Determine the waveguide wavelength λ g. 14. Restore the load. Do not turn off the Klystron Power Supply. Do not look into the waveguide. Make sure the joints are tight, e.g. cannot be displaced by hand. 15. Set the attenuator to 1.1 mm (about 6 db return loss). 16. Move the detector probe along the waveguide to locate the point of maximum power. Henceforth, for convenience, it will be referred to as the maximum point (or minimum point for minimum power). 17. Adjust the gain of the SWR meter so that its reading is 0 db on the bottom scale (i.e. full scale deflection). Do not overdrive the SWR meter. 18. Move the probe to locate a minimum point (any minimum point). Record its position, x 0. Read and record the SWR from the SWR meter**. ** There are 5 scales on the SWR meter. From the top, the first two are meant for the expand mode (not used). Third and fourth are linear scales. The third scale is used when the maximum and minimum are observed using the same range-gain. The fourth scale is used when the minimum is observed using a range-gain 10dB higher than that of the maximum. The fifth scale is a log scale (db). Difference in range-gain between the maximum and minimum should be added to the reading on the log scale to obtain the SWR in db. 19. (it means skip this line) 20. Calculate d = (x 0 x 1 ) / λ g. 21. On the Smith Chart, locate the resistance grid having a value equal to the recorded SWR. Locate the intersection between this resistance grid and the horizontal line in the middle of the Smith Chart. See Appendix A. 22. Using a pair of compasses, draw a circle that goes around the center of the Smith Chart and passes through the intersection point of step 21. It is the circle of constant mismatch, also known as the SWR circle. See Appendix A. 23. On the Smith Chart, locate the short circuit point z sc = 0 + j0. Starting from the short circuit point, move around the toward load scale to locate the distance d if d > 0 (hereafter known as point E); use the toward generator scale for d < 0. See Appendix A. 24. Draw a straight line that passes through point E and the centre of the Smith Chart, and crosses all the circles. There are two intersections between this line and the SWR circle. The normalized load impedance z L is given by the intersection nearest to point E. The farther intersection gives the normalized load admittance y L. With the aid of the resistance/conductance grids and reactance/susceptance grids, read z L and y L. See Appendix A and B. 7
8 EM Theory Faculty of Engineering, Multimedia University 8 Evaluation B: (psychomotor complex overt response, level 5) [30 marks] i. Tabulate your measurements and draw on the Smith chart. ii. Be ready to demonstrate how the measurements were done. iii. Request for evaluation when you are ready. C. Impedance Matching Using Smith Chart (20 minutes) 25. The line drawn in step 24 also makes two intersections with the toward generator scale. Record the distance d 1 on the toward generator scale (irrespective of the sign of d) for the farther intersection. See Appendix B. 26. Determine the point y 1 where the SWR circle intersects the unity constant resistance circle. There are two intersections; use the one with negative susceptance. Draw a line from the center of the Smith Chart, through y 1, to the outer most circle. The line will intersect the toward generator scale. Record the distance d 2 on the toward generator scale at the intersection point. See Appendix A and B. 27. Calculate d = (d 2 - d 1 ) λ g d is the distance from the load terminal towards generator where the input conductance G will be equal to the characteristic admittance Y o. Evaluation C: (cognitive application, level 3) [20 marks] i. Draw on the Smith chart. ii. Request for evaluation when you are ready. D. Verify and Fine Tune Impedance Matching Conditions (60 minutes) 28. The slide-screw tuner (hereafter referred to as tuner) acts as a variable shunt capacitor. For impedance matching, it should be placed d from the load terminal. Note that d is measured from the load towards generator. d computed from step 27 may not give a practical position to insert a tuning screw. In that case, add an integral number of half-wavelengths (nλ g /2) to d in order to determine a practical position to insert a tuning screw. Record the distance D o = d + nλ g /2 from the load, where the tuning screw is to be inserted. 29. Position the tuner at distance D o from the load terminal. The distance between the load terminal and the beginning of the vernier scale on the tuner is 50 mm. 30. Measure the SWR before impedance matching (see step 16. to 18. ). Henceforth, it will be referred to as the initial SWR. 31. Increase the tuner (not slotted-line probe!) protrusion depth slowly until there is a noticeable change in the meter reading. Re-measure the SWR at this point. 32. If the new SWR is less than the initial SWR, proceed to step 33. Otherwise, there were errors in impedance matching calculations and D o is not correct. Move the tuner to the left or right (choose a direction with ample movement space) by 1 mm. Remeasure the SWR. Repeat the 1 mm movement and re-measure the SWR of course, until the SWR is noticeably less than the initial SWR. 33. At this point, you should have a new SWR less than the initial SWR. 8
9 EM Theory Faculty of Engineering, Multimedia University Increase the tuner protrusion depth slowly until there is a noticeable change in the meter reading. Re-measure the SWR at this point. 35. Repeat step 34. until the new SWR is more than the previous one. You have just missed the optimum protrusion depth giving minimum SWR. 36. Fine tune the protrusion depth to locate the point of minimum SWR. 37. If the new SWR is less than 1.1, proceed to step 39. Otherwise, further fine tuning is required. With the protrusion depth intact, move the tuner to the left or right by 1 mm Use a smaller movement value (this requires heuristic judgments) if you are close to SWR 1.1. Re-measure the SWR. If the new SWR is more than the previous one, very likely the movement direction is wrong, try moving in the opposite direction and remeasure the SWR. Repeat the process until you have the optimum tuner position giving minimum SWR. 38. Repeat steps 36. and 37. until you have the SWR less than 1.1.*** 39. Record the final SWR = S 1 achieved, the position D 1 of the tuner, and the protrusion depth p. *** Note that, for simplicity, the above tuning procedure assumes that independent tuning of tuner position and protrusion depth will converge to the optimum point. From previous experience, it is generally true, but not always true. In the case that it is not true, one has to find the optimum depth for each tuner position in order to locate the optimum tuner position. Evaluation D: (psychomotor adaptation, level 6) [40 marks] i. Tabulate your results. ii. Be ready to demonstrate the impedance matched state. iii. Request for evaluation when you are ready. 9
10 EM Theory Faculty of Engineering, Multimedia University 10 APPENDIX A toward generator scale (23) reactance/susceptance grids (24) SWR circle (22) unity constant resistance/conductance circle 0 + j0 (23) centre resistance/conductance grids (21,24) SWR (21) Intersections with the unity circle toward load scale (23) 10
11 EM Theory Faculty of Engineering, Multimedia University 11 APPENDIX B SWR circle (22) d 1 (25) y L (24) d z L (24) E (23) y 1 (26) d 2 d 1 (27) d 2 (26) 11
12 EM Theory Faculty of Engineering, Multimedia University
13 EM Theory Faculty of Engineering, Multimedia University
MULTIMEDIA UNIVERSITY FACULTY OF ENGINEERING LAB SHEET
MULTIMEDIA UNIVERSITY FACULTY OF ENGINEERING LAB SHEET ELECTROMAGNETIC THEORY EMF016 MW1 MICROWAVE FREQUENCY AND SWR MEASUREMENTS EM Theory Faculty of Engineering, Multimedia University 1 EXPERIMENT MW1:
More informationMICROWAVE AND RADAR LAB (EE-322-F) LAB MANUAL VI SEMESTER
1 MICROWAVE AND RADAR LAB (EE-322-F) MICROWAVE AND RADAR LAB (EE-322-F) LAB MANUAL VI SEMESTER RAO PAHALD SINGH GROUP OF INSTITUTIONS BALANA(MOHINDERGARH)123029 Department Of Electronics and Communication
More informationMICROWAVE MICROWAVE TRAINING BENCH COMPONENT SPECIFICATIONS:
Microwave section consists of Basic Microwave Training Bench, Advance Microwave Training Bench and Microwave Communication Training System. Microwave Training System is used to study all the concepts of
More informationMAHAVEER INSTITUTE OF SCIENCE & TECHNOLOGY. Microwave and Digital Communications Lab. Department Of Electronics and Communication Engineering
MAHAVEER INSTITUTE OF SCIENCE & TECHNOLOGY Microwave and Digital Communications Lab Department Of Electronics and Communication Engineering MICROWAVE ENGINEERING LAB List of Experiments: 1.Reflex Klystron
More informationEE 3324 Electromagnetics Laboratory
EE 3324 Electromagnetics Laboratory Experiment #11 Microwave Systems 1. Objective The objective of Experiment #11 is to investigate microwave systems and associated measurement techniques. A precision
More informationResonant and Nonresonant Lines. Input Impedance of a Line as a Function of Electrical Length
Exercise 3-3 The Smith Chart, Resonant Lines, EXERCISE OBJECTIVES Upon completion of this exercise, you will know how the input impedance of a mismatched line varies as a function of the electrical length
More information7. Experiment K: Wave Propagation
7. Experiment K: Wave Propagation This laboratory will be based upon observing standing waves in three different ways, through coaxial cables, in free space and in a waveguide. You will also observe some
More informationTransmission lines. Characteristics Applications Connectors
Transmission lines Characteristics Applications Connectors Transmission Lines Connect They allow us to conduct RF Signals between our station components, they connect: Transceivers Antennas Tuners Amplifiers
More informationAmateur Extra Manual Chapter 9.4 Transmission Lines
9.4 TRANSMISSION LINES (page 9-31) WAVELENGTH IN A FEED LINE (page 9-31) VELOCITY OF PROPAGATION (page 9-32) Speed of Wave in a Transmission Line VF = Velocity Factor = Speed of Light in a Vacuum Question
More informationA Stub Matched Lazy H for 17 M
A Stub Matched Lazy H for 17 M Introduction The author has experimented with various configurations of the classic Lazy H antenna and a version optimised for operation on the 17 M band is shown in Figure
More informationREFLECTIONS AND STANDING WAVE RATIO
Page 1 of 9 THE SMITH CHART.In the last section we looked at the properties of two particular lengths of resonant transmission lines: half and quarter wavelength lines. It is possible to compute the impedance
More informationENE324. Microwave experiments
ENE324 Microwave experiments Gunn diodes are fabricated from a single piece of n-type semiconductor. The most common materials are gallium Arsenide, GaAs and Indium Phosphide,InP. However other materials
More informationDhanalakshmi College of Engineering Department of ECE EC6701 RF and Microwave Engineering Unit 5 Microwave Measurements Part A
Dhanalakshmi College of Engineering Department of ECE EC6701 RF and Microwave Engineering Unit 5 Microwave Measurements Part A 1. What is the principle by which high power measurements could be done by
More informationMICROWAVE AND RADAR ENGINEERING (EE 322 F) LIST OF EXPERIMENTS. S.NO. NAME OF THE EXPERIMENT Page No.
LIST OF EXPERIMENTS S.NO. NAME OF THE EXPERIMENT Page No. 1 To study wave guide components. 1-3 2 To study the characteristics of Gunn oscillator &Gun diode as 4-6 modulated source. 3 Study of wave guide
More informationLRL Model 550B-SS Microwave Training Kit
MICROWAVES FOR EVERYONE LRL Model 550B-SS Microwave Training Kit Microwave Training Kit 5 Experiments I-95 Industrial Park 651 Winks Lane Bensalem, PA 1900 800.53.399 15.638.1100 3rd edition INITIAL SET-UP
More informationDX University: Smith Charts
DX University: Smith Charts 2010 August 9 Sponsored by the Kai Siwiak, ke4pt@amsat.org Ed Callaway, n4ii@arrl.org 2010 Aug 9 Kai, KE4PT; Ed, N4II 2 Source: http://www.sss-mag.com/pdf/smithchart.pdf 2010
More informationEP603 Microwave Devices
EP603 Microwave Devices TOPIC 3 MICROWAVE MEASUREMENTS Lesson Learning outcomes 1. Draw the block diagram of instrument in microwave testing 2. Explain the function of each block and overall measurement
More informationSINGLE & DOUBLE STUB MATCHING TECHNIQUES
SINGLE & DOUBLE STUB MATCHING TECHNIQUES PROF.MADHURI MAHENDRA PATIL Department of Electronics and Telecommunication PRAVIN PATIL DIPLOMA COLLEGE, BHAYANDAR-401105 Abstract: The purpose of this paper is
More informationMicrowave Circuit Design and Measurements Lab. INTRODUCTION TO MICROWAVE MEASUREMENTS: DETECTION OF RF POWER AND STANDING WAVES Lab #2
EE 458/558 Microwave Circuit Design and Measurements Lab INTRODUCTION TO MICROWAVE MEASUREMENTS: DETECTION OF RF POWER AND STANDING WAVES Lab #2 The purpose of this lab is to gain a basic understanding
More informationEXPERIMENT EM3 INTRODUCTION TO THE NETWORK ANALYZER
ECE 351 ELECTROMAGNETICS EXPERIMENT EM3 INTRODUCTION TO THE NETWORK ANALYZER OBJECTIVE: The objective to this experiment is to introduce the student to some of the capabilities of a vector network analyzer.
More informationR.K.YADAV. 2. Explain with suitable sketch the operation of two-cavity Klystron amplifier. explain the concept of velocity and current modulations.
Question Bank DEPARTMENT OF ELECTRONICS AND COMMUNICATION SUBJECT- MICROWAVE ENGINEERING(EEC-603) Unit-III 1. What are the high frequency limitations of conventional tubes? Explain clearly. 2. Explain
More informationTransmission Lines. Ranga Rodrigo. January 27, Antennas and Propagation: Transmission Lines 1/72
Transmission Lines Ranga Rodrigo January 27, 2009 Antennas and Propagation: Transmission Lines 1/72 1 Standing Waves 2 Smith Chart 3 Impedance Matching Series Reactive Matching Shunt Reactive Matching
More informationEC 1402 Microwave Engineering
SHRI ANGALAMMAN COLLEGE OF ENGINEERING & TECHNOLOGY (An ISO 9001:2008 Certified Institution) SIRUGANOOR,TRICHY-621105. DEPARTMENT OF ELECTRONICS AND COMMUNICATION ENGINEERING EC 1402 Microwave Engineering
More informationEE 3324 Electromagnetics Laboratory
EE 3324 Electromagnetics Laboratory Experiment #10 Microstrip Circuits and Measurements 1. Objective The objective of Experiment #8 is to investigate the application of microstrip technology. A precision
More informationCourseware Sample F0
Telecommunications Courseware Sample 85756-F0 A TELECOMMUNICATIONS COURSEWARE SAMPLE by the Staff of Lab-Volt Ltd. Copyright 2008 Lab-Volt Ltd. All rights reserved. No part of this publication may be
More informationΓ L = Γ S =
TOPIC: Microwave Circuits Q.1 Determine the S parameters of two port network consisting of a series resistance R terminated at its input and output ports by the characteristic impedance Zo. Q.2 Input matching
More informationSmith Chart Calculations
The following material was extracted from earlier editions. Figure and Equation sequence references are from the 21st edition of The ARRL Antenna Book Smith Chart Calculations The Smith Chart is a sophisticated
More informationThe Smith Chart is a sophisticated graphic tool for solving transmission line problems. One of the
Chapter 28 Smith Chart Calculations The Smith Chart is a sophisticated graphic tool for solving transmission line problems. One of the simpler applications is to determine the feed-point impedance of an
More informationChapter 12: Transmission Lines. EET-223: RF Communication Circuits Walter Lara
Chapter 12: Transmission Lines EET-223: RF Communication Circuits Walter Lara Introduction A transmission line can be defined as the conductive connections between system elements that carry signal power.
More informationTHE CONVERSION OF AN ATTENUATOR TO PHASE SHIFTER AND THE CALIBRATION OF BOTH
..a. THE CONVERSION OF AN ATTENUATOR TO PHASE SHIFTER AND THE CALIBRATION OF BOTH JOHN REED I TECHNICAL REPORT NO. 15 SEPTEMBER 23, 1946 RESEARCH LABORATORY OF ELECTRONICS MASSACHUSETTS INSTITUTE OF TECHNOLOGY
More informationDinesh Micro Waves & Electronics
MICROWAVE TRAINING KITS Dinesh Microwaves and Electronics manufacturers of three centimeter waveguidetraining system to provide users an in depth training on microwave waveguide device. The training kit
More informationEMG4066:Antennas and Propagation Exp 1:ANTENNAS MMU:FOE. To study the radiation pattern characteristics of various types of antennas.
OBJECTIVES To study the radiation pattern characteristics of various types of antennas. APPARATUS Microwave Source Rotating Antenna Platform Measurement Interface Transmitting Horn Antenna Dipole and Yagi
More informationEC Transmission Lines And Waveguides
EC6503 - Transmission Lines And Waveguides UNIT I - TRANSMISSION LINE THEORY A line of cascaded T sections & Transmission lines - General Solution, Physical Significance of the Equations 1. Define Characteristic
More informationThe Principle V(SWR) The Result. Mirror, Mirror, Darkly, Darkly
The Principle V(SWR) The Result Mirror, Mirror, Darkly, Darkly 1 Question time!! What do you think VSWR (SWR) mean to you? What does one mean by a transmission line? Coaxial line Waveguide Water pipe Tunnel
More informationExperiment #51 -- Filter Design #2
Experiment #51 -- Filter Design #2 Ed Wetherhold W3NQN caught your editor crossing his terms: "Return coefficient" is incorrect. What was meant is, of course, "reflection coefficient". Return loss is another
More informationTechnician License. Course
Technician License Course Technician License Course Chapter 4 Lesson Plan Module - 9 Antenna Fundamentals Feed Lines & SWR The Antenna System The Antenna System Antenna: Transforms current into radio waves
More informationMicrowave Variable-Frequency Measurements and Applications
Telecommunications Microwave Variable-Frequency Measurements and Applications Courseware Sample 39974-F0 Order no.: 39974-00 First Edition Revision level: 02/2015 By the staff of Festo Didactic Festo Didactic
More informationLecture 16 Microwave Detector and Switching Diodes
Basic Building Blocks of Microwave Engineering Prof. Amitabha Bhattacharya Department of Electronics and Communication Engineering Indian Institute of Technology, Kharagpur Lecture 16 Microwave Detector
More informationLab 12 Microwave Optics.
b Lab 12 Microwave Optics. CAUTION: The output power of the microwave transmitter is well below standard safety levels. Nevertheless, do not look directly into the microwave horn at close range when the
More informationUsing the LC-Lumped Element Model for Transmission Line Experiments
Session 2526 Using the LC-Lumped Element Model for Transmission Line Experiments F. Jalali Electronic Engineering Technology Department Fort Valley State University Introduction An array of cascaded lumped-element
More informationELEC4604. RF Electronics. Experiment 2
ELEC4604 RF Electronics Experiment MICROWAVE MEASUREMENT TECHNIQUES 1. Introduction and Objectives In designing the RF front end of a microwave communication system it is important to appreciate that the
More informationTechnician License Course Chapter 4. Lesson Plan Module 9 Antenna Fundamentals, Feed Lines & SWR
Technician License Course Chapter 4 Lesson Plan Module 9 Antenna Fundamentals, Feed Lines & SWR The Antenna System Antenna: Transforms current into radio waves (transmit) and vice versa (receive). Feed
More informationKULLIYYAH OF ENGINEERING
KULLIYYAH OF ENGINEERING DEPARTMENT OF ELECTRICAL & COMPUTER ENGINEERING ANTENNA AND WAVE PROPAGATION LABORATORY (ECE 4103) EXPERIMENT NO 3 RADIATION PATTERN AND GAIN CHARACTERISTICS OF THE DISH (PARABOLIC)
More informationJEREMY HALEY, WG9T LONGMONT AMATEUR RADIO CLUB. Longmont Amateur Radio Club
RF IMPEDANCE AND THE SMITH CHART JEREMY HALEY, WG9T LONGMONT AMATEUR RADIO CLUB 1 RESISTANCE, REACTANCE, AND IMPEDANCE RESISTANCE Energy conversion to heat. REACTANCE Capacitance: Energy storage in electric
More informationExperiment-4 Study of the characteristics of the Klystron tube
Experiment-4 Study of the characteristics of the Klystron tube OBJECTIVE To study the characteristics of the reflex Klystron tube and to determine the its electronic tuning range EQUIPMENTS Klystron power
More informationExperiment 19. Microwave Optics 1
Experiment 19 Microwave Optics 1 1. Introduction Optical phenomena may be studied at microwave frequencies. Using a three centimeter microwave wavelength transforms the scale of the experiment. Microns
More informationMICROWAVE COMMUNICATION LAB
SRI SUKHMANI INSTITUTE OF ENGINEERING AND TECHNOLOGY, DERA BASSI (MOHALI) MICROWAVE COMMUNICATION LAB Laboratory Manual SRI SUKHMANI INSTITUTE OF ENGINEERING & TECHNOLOGY DERA BASSI DEPARTMENT: ELECTRONICS
More informationMICROWAVE EDUCATIONAL BENCH ORITEL BDH R100. Experimentation manual
MICROWAVE EDUCATIONAL BENCH ORITEL BDH R100 E N G L I S H Experimentation manual 1 Meaning of the symbol! : CAUTION! Consult the experimentation manual before using the bench. In this experimentation manual,
More information. From the above data, determine the network is symmetric or not.
Velammal College of Engineering and Technology, Madurai Department of Electronics and Communication Engineering Question Bank Subject Name: EC2353 Antennas And Wave Propagation Faculty: Mrs G VShirley
More informationThe cross directional coupler
Fundamentals General properties of waveguide (directional) couplers is a special type of directional coupler. Thus, it makes sense to follow with a general explanation applicable to the function of all
More informationMICROWAVE OPTICS. Instruction Manual and Experiment Guide for the PASCO scientific Model WA-9314B G
Includes Teacher's Notes and Typical Experiment Results Instruction Manual and Experiment Guide for the PASCO scientific Model WA-9314B 012-04630G MICROWAVE OPTICS 10101 Foothills Blvd. Roseville, CA 95678-9011
More informationWhat is a matching network?
Impedance Matching and Tuning Matching networks are used to match the impedance of one system to another Match is important for several reasons: Provides for maximum power transfer (e.g. carrying power
More informationSpeed of Sound in Air
Speed of Sound in Air OBJECTIVE To explain the condition(s) necessary to achieve resonance in an open tube. To understand how the velocity of sound is affected by air temperature. To determine the speed
More informationThe Amazing MFJ 269 Author Jack Tiley AD7FO
The Amazing MFJ 269 Author Jack Tiley AD7FO ARRL Certified Emcomm and license class Instructor, Volunteer Examiner, EWA Technical Coordinator and President of the Inland Empire VHF Club What Can be Measured?
More informationChapter 6 Antenna Basics. Dipoles, Ground-planes, and Wires Directional Antennas Feed Lines
Chapter 6 Antenna Basics Dipoles, Ground-planes, and Wires Directional Antennas Feed Lines Some General Rules Bigger is better. (Most of the time) Higher is better. (Most of the time) Lower SWR is better.
More informationMFJ-219/219N 440 MHz UHF SWR Analyzer TABLE OF CONTENTS
MFJ-219/219N 440 MHz UHF SWR Analyzer TABLE OF CONTENTS Introduction...2 Powering The MFJ-219/219N...3 Battery Installation...3 Operation Of The MFJ-219/219N...4 SWR and the MFJ-219/219N...4 Measuring
More informationUNIVERSITY OF TORONTO FACULTY OF APPLIED SCIENCE AND ENGINEERING The Edward S. Rogers Sr. Department of Electrical and Computer Engineering
UNIVERSITY OF TORONTO FACULTY OF APPLIED SCIENCE AND ENGINEERING The Edward S. Rogers Sr. Department of Electrical and Computer Engineering 1. Object: ECE357H1F: ELECTOMAGNETIC FIELDS EXPERIMENT 1: DESIGN
More informationInvestigation of a Voltage Probe in Microstrip Technology
Investigation of a Voltage Probe in Microstrip Technology (Specifically in 7-tesla MRI System) By : Mona ParsaMoghadam Supervisor : Prof. Dr. Ing- Klaus Solbach April 2015 Introduction - Thesis work scope
More informationImpedance Matching Techniques for Mixers and Detectors. Application Note 963
Impedance Matching Techniques for Mixers and Detectors Application Note 963 Introduction The use of tables for designing impedance matching filters for real loads is well known [1]. Simple complex loads
More informationTransmission Lines. Chapter 24. Basic Theory of Transmission Lines
Chapter 24 Transmission Lines Basic Theory of Transmission Lines The desirability of installing an antenna in a clear space, not too near buildings or power and telephone lines, cannot be stressed too
More informationASSIGNMENT: Directional Coupler
ECE 323- MICROWAVE ENGINEERING LABORATORY 1 ASSIGNMENT: Directional Coupler I. OBJECTIVES Know the properties of directional couplers and their applications in microwave transmission and measurement systems.
More informationPhysics 4C Chabot College Scott Hildreth
Physics 4C Chabot College Scott Hildreth The Inverse Square Law for Light Intensity vs. Distance Using Microwaves Experiment Goals: Experimentally test the inverse square law for light using Microwaves.
More informationExercise 3-2. Effects of Attenuation on the VSWR EXERCISE OBJECTIVES
Exercise 3-2 Effects of Attenuation on the VSWR EXERCISE OBJECTIVES Upon completion of this exercise, you will know what the attenuation constant is and how to measure it. You will be able to define important
More informationPhysics 476LW. Advanced Physics Laboratory - Microwave Optics
Physics 476LW Advanced Physics Laboratory Microwave Radiation Introduction Setup The purpose of this lab is to better understand the various ways that interference of EM radiation manifests itself. However,
More informationNetwork Analysis Basics
Adolfo Del Solar Application Engineer adolfo_del-solar@agilent.com MD1010 Network B2B Agenda Overview What Measurements do we make? Network Analyzer Hardware Error Models and Calibration Example Measurements
More information(i) Determine the admittance parameters of the network of Fig 1 (f) and draw its - equivalent circuit.
I.E.S-(Conv.)-1995 ELECTRONICS AND TELECOMMUNICATION ENGINEERING PAPER - I Some useful data: Electron charge: 1.6 10 19 Coulomb Free space permeability: 4 10 7 H/m Free space permittivity: 8.85 pf/m Velocity
More informationModel 3140B BiConiLog Antenna User Manual
Model 3140B BiConiLog Antenna User Manual Model 3140B mounted onto a 7-TR tripod (not included) ETS-Lindgren L.P. reserves the right to make changes to any product described herein in order to improve
More informationMicrowave Optics. Department of Physics & Astronomy Texas Christian University, Fort Worth, TX. January 16, 2014
Microwave Optics Department of Physics & Astronomy Texas Christian University, Fort Worth, TX January 16, 2014 1 Introduction Optical phenomena may be studied at microwave frequencies. Visible light has
More informationAntenna Fundamentals Basics antenna theory and concepts
Antenna Fundamentals Basics antenna theory and concepts M. Haridim Brno University of Technology, Brno February 2017 1 Topics What is antenna Antenna types Antenna parameters: radiation pattern, directivity,
More informationSignal and Noise Measurement Techniques Using Magnetic Field Probes
Signal and Noise Measurement Techniques Using Magnetic Field Probes Abstract: Magnetic loops have long been used by EMC personnel to sniff out sources of emissions in circuits and equipment. Additional
More informationAC Measurements with the Agilent 54622D Oscilloscope
AC Measurements with the Agilent 54622D Oscilloscope Objectives: At the end of this experiment you will be able to do the following: 1. Correctly configure the 54622D for measurement of voltages. 2. Perform
More informationTUTORIAL #7 Using the Smith Chart
TUTORIAL #7 Using the Smith Chart. [.9 P expanded] Use the Smith chart to find the following quantities for the transmission-line circuit in the figure below. L Z0 Z j L Z in (a) The SWR on the line. (b)
More informationStanding Waves and Voltage Standing Wave Ratio (VSWR)
Exercise 3-1 Standing Waves and Voltage Standing Wave Ratio (VSWR) EXERCISE OBJECTIVES Upon completion of this exercise, you will know how standing waves are created on transmission lines. You will be
More informationPart 1: Standing Waves - Measuring Wavelengths
Experiment 7 The Microwave experiment Aim: This experiment uses microwaves in order to demonstrate the formation of standing waves, verifying the wavelength λ of the microwaves as well as diffraction from
More informationChapter 4 Impedance Matching
Chapter 4 Impedance Matching Quarter-wave transformer, series section transformer Stub matching, lumped element networks, feed point location 3 Gamma match 4 Delta- and T-match, Baluns -port network Smith
More informationUniversity of Jordan School of Engineering Electrical Engineering Department. EE 219 Electrical Circuits Lab
University of Jordan School of Engineering Electrical Engineering Department EE 219 Electrical Circuits Lab EXPERIMENT 7 RESONANCE Prepared by: Dr. Mohammed Hawa EXPERIMENT 7 RESONANCE OBJECTIVE This experiment
More informationNH-67, TRICHY MAIN ROAD, PULIYUR, C.F , KARUR DT. DEPARTMENT OF ELECTRONICS AND COMMUNICATION ENGINEERING COURSE MATERIAL
NH-67, TRICHY MAIN ROAD, PULIYUR, C.F. 639 114, KARUR DT. DEPARTMENT OF ELECTRONICS AND COMMUNICATION ENGINEERING COURSE MATERIAL Subject Name: Microwave Engineering Class / Sem: BE (ECE) / VII Subject
More informationElectromagnetic Induction - A
Electromagnetic Induction - A APPARATUS 1. Two 225-turn coils 2. Table Galvanometer 3. Rheostat 4. Iron and aluminum rods 5. Large circular loop mounted on board 6. AC ammeter 7. Variac 8. Search coil
More informationDinesh Micro Waves & Electronics
Wave Guide Components RECTANGULAR WAVE GUDES Dinesh Microwaves and Electronics manufacturers of high power waveguide in the microwaves industry, this experience had resulted in designing, manufacturing
More informationVIVA-VOCE QUESTIONS MICROWAVE LAB
VIVA-VOCE QUESTIONS MICROWAVE LAB DAWAR PARUL EXPERIMENT NO.-2 1) How are wavelength measured? 2) How do you measure wavelength in a compression wave? 3) What is the units of measure for wavelength? 4)
More informationDEPARTMENT OF THE ARMY TECHNICAL BULLETIN CALIBRATION PROCEDURE FOR SHF SIGNAL GENERATOR AN/USM-47 (HEWLETT-PACKARD MODEL 626A) (NSN )
DEPARTMENT OF THE ARMY TECHNICAL BULLETIN CALIBRATION PROCEDURE FOR SHF SIGNAL GENERATOR AN/USM-47 (HEWLETT-PACKARD MODEL 626A) (NSN 6625-00-455-6917) Headquarters, Department of the Army, Washington,
More informationPractical Antennas and. Tuesday, March 4, 14
Practical Antennas and Transmission Lines Goals Antennas are the interface between guided waves (from a cable) and unguided waves (in space). To understand the various properties of antennas, so as to
More informationApplication Note No. 022
Application Note, Rev. 2.0, Jan. 2007 Application Note No. 022 Simple Microstrip Matching for all Impedances RF & Protection Devices Edition 2007-01-17 Published by Infineon Technologies AG 81726 München,
More informationSt.MARTIN S ENGINEERING COLLEGE Dhulapally, Secunderabad
St.MARTIN S ENGINEERING COLLEGE Dhulapally, Secunderabad 500014. Department of Electronics and Communication Engineering SUB: MICROWAVE ENGINEERING SECTION: ECE IV A & B NAME OF THE FACULTY: S RAVI KUMAR,T.SUDHEER
More informationLecture 9 - Lumped Element Matching Networks
Lecture 9 - Lumped Element Matching Networks Microwave Active Circuit Analysis and Design Clive Poole and Izzat Darwazeh Academic Press Inc. Poole-Darwazeh 2015 Lecture 9 - Lumped Element Matching Networks
More information6 Experiment II: Law of Reflection
Lab 6: Microwaves 3 Suggested Reading Refer to the relevant chapters, 1 Introduction Refer to Appendix D for photos of the apparatus This lab allows you to test the laws of reflection, refraction and diffraction
More informationSmall Magnetic Loops: A Beginner s Guide WOW! This is a very different antenna!
Small Magnetic Loops: A Beginner s Guide WOW! This is a very different antenna! Dave Wickert, AE7TD Lake Washington Ham Club November 2018 Meeting 10-Nov-2018 Dayton Hamvention 2017 History Full Size Loops
More informationMFJ269 Antenna Analyzer Theory And Use
MFJ69 Antenna Analyzer Theory And Use By Jim McVey, ACEU www.mcveyelectronics.com The MFJ 69 is a handy instrument for checking your antenna, test coax, or to even test tuners. Although it has it s limitations
More informationEC6503 Transmission Lines and WaveguidesV Semester Question Bank
UNIT I TRANSMISSION LINE THEORY A line of cascaded T sections & Transmission lines General Solution, Physicasignificance of the equations 1. Derive the two useful forms of equations for voltage and current
More informationManual For Experiment
AT-RF3030 RF EDUCATION EXPERIMENT SYSTEM Manual For Experiment SHENZHEN ATTEN ELECTRONICS CO.,LTD. 1 Quality assurance SHENZHEN ATTEN ELECTRONICS Co., Ltd. offers the quality assurance for this product.
More informationEELE 3332 Electromagnetic II Chapter 11. Transmission Lines. Islamic University of Gaza Electrical Engineering Department Dr.
EELE 3332 Electromagnetic II Chapter 11 Transmission Lines Islamic University of Gaza Electrical Engineering Department Dr. Talal Skaik 2012 1 11.6 Some Applications of Transmission Lines Transmission
More informationPart Number I s (Amps) n R s (Ω) C j (pf) HSMS x HSMS x HSCH x
The Zero Bias Schottky Detector Diode Application Note 969 Introduction A conventional Schottky diode detector such as the Agilent Technologies requires no bias for high level input power above one milliwatt.
More informationDevice Interconnection
Device Interconnection An important, if less than glamorous, aspect of audio signal handling is the connection of one device to another. Of course, a primary concern is the matching of signal levels and
More informationResonance Tube. 1 Purpose. 2 Theory. 2.1 Air As A Spring. 2.2 Traveling Sound Waves in Air
Resonance Tube Equipment Capstone, complete resonance tube (tube, piston assembly, speaker stand, piston stand, mike with adaptors, channel), voltage sensor, 1.5 m leads (2), (room) thermometer, flat rubber
More informationS-band Magnetron. Tuner revolutions to cover frequency range 4.75 (note 3) Mounting position (note 4) Any Cooling (note 5) Water
S-band Magnetron GENERAL DESCRIPTION is a mechanical tuned pulsed type S-band magnetron intended primarily for linear accelerator. It is water cooled and has circle waveguide output type. It is designed
More informationDepartment of Electronics and Communication Engineering
Department of Electronics and Communication Engineering Sub Code/Name: BEC7L3-MICROWAVE ENGINEERING LAB Name Reg No Branch Year & Semester : : : : LIST OF EXPERIMENTS Sl No Experiments 1 Study of microwave
More informationEMC Amplifiers Going Beyond the Basics to Ensure Successful Immunity Tests
EMC Amplifiers Going Beyond the Basics to Ensure Successful Immunity Tests Paul Denisowski, Application Engineer Broadband amplifiers are used to generate the high field strengths required by EMC radiated
More informationTechnician Licensing Class. Lesson 4. presented by the Arlington Radio Public Service Club Arlington County, Virginia
Technician Licensing Class Lesson 4 presented by the Arlington Radio Public Service Club Arlington County, Virginia 1 Quiz Sub elements T6 & T7 2 Good Engineering Practice Sub element T8 3 A Basic Station
More informationCHAPTER - 3 PIN DIODE RF ATTENUATORS
CHAPTER - 3 PIN DIODE RF ATTENUATORS 2 NOTES 3 PIN DIODE VARIABLE ATTENUATORS INTRODUCTION An Attenuator [1] is a network designed to introduce a known amount of loss when functioning between two resistive
More informationLXI -Certified 7mm Automated Tuners
LXI -Certified 7mm Automated Tuners DATA SHEET / 4T-050G07 MODELS: XT982GL01 XT982GL30 XT982AL02 XT-SERIES TUNERS REPRESENT THE NEXT EVOLUTION IN TUNER TECHNOLOGY. FASTER, MORE ACCURATE, MORE REPEATABLE.
More information