# EC ANTENNA AND WAVE PROPAGATION

Size: px
Start display at page:

## Transcription

2 21. An antenna has a loss resistance of 10 Ω power gain of 20 and directivity gain of 22. Calculate the radiation resistance. 22. Calculate the effective length of a λ/2 antenna gives Rr=73 Ω effective aperture 0.13 m An antenna radiates power equally in all directions. The total power delivered to the radiator is 100 KW. Calculate the power density at distance of (i) 100m (ii) 1000m. 24. Derive the electric and magnetic field components of Hertzian dipole. (APRIL / MAY 2011) 25. Explain the following terms with respect to antenna, (APRIL / MAY 2011) i). Polarization ii). Effective aperture iii). Directivity iv). Antenna temperature v). Radiation pattern 26. What are Hertzian dipoles? Derive the electric and magnetic field quantities of Infinitesimal dipole and radiation pattern. (NOV. / DEC. 2011) 27. Explain the following terms with respect to antenna, (NOV. / DEC. 2011) i). Polarization ii). Beam solid angle iii). Gain iv). Bandwidth v). Radiation pattern 35. Solve the wave equation for uniform plane waves in an infinitely extending conducting medium. (MAY / JUNE 2012) 36. Write short notes on: (MAY / JUNE 2012) i). Radiation pattern ii). Polarization iii). Antenna temperature. UNIT II WIRE ANTENNAS AND ANTENNA ARRAYS 1. Write a note on antenna arrays. Mention the factors on which the resultant pattern of array depends.. 2. Differentiate between BSA and EFA. 3. Derive an expression for electric field intensity of array of n isotropic sources of equal amplitude and spacing and having a phase difference of Explain the principle of pattern multiplication. 5. Obtain the electric field intensity of non isotropic but similar point sources. 6. Obtain the radiation pattern of 4 sources forming a uniform BSA with a spacing of λ/ sources have equal magnitude & are spaced λ/2 apart. Maximum field is to be in line with sources. Plot the field pattern of the array 8. Find BWFN for uniform EFA & extended EFA. Given (i) n=4 (ii) d= λ/2. 9. The principle lobe width of uniform 10 elements of BSA was observed to be 30 o at a frequency of 30MHz. Estimate the distance between the individual elements of the array. 10. A uniform linear array consists of 16 isotropic sources with a spacing of λ/4 & phase difference φ = - 90 o. Calculate HPBW & effective aperture.

4 32. Derive the expression for field pattern of end-fire array of n sources of equal amplitude and spacing (MAY / JUNE 2012) UNIT III APERTURE ANTENNAS 1. What is Horn Antenna? Sketch the various types of Horn Antenna and explain its operation. 2. Describe the principle of operation and applications of parabolic reflectors and derive its necessary equations. 3. Explain Slot antenna and derive its field expressions. 4. Explain the methods of feeding Slot Antenna? 5. Explain the different types of Lens antenna and derive their equations. 6. Describe Flat sheet and corner reflectors and derive their field equations. 7. Explain the following theorem in detail i. Uniqueness theorem ii. Field equivalence principle iii. Method of images iv. Huygenes principle v. Babinets principle vi. Duality principle 8. Explain the structure and operation of Slot antenna. Also derive the expression of its input impedance. 9. Explain the working operation of parabolic reflector antenna in detail. 10. Explain the working operation of lens antenna. Also explain its types. 11. Explain the operation of hyperbolic reflectors and derive its equation. 12. Explain the radiation mechanism of microwave Horn antenna with diagram. (NOV. / DEC. 2011) 13.Explain the special features of parabolic reflector antenna and discuss on different types of feed used with neat diagram. (NOV. / DEC. 2011) 14.Explain the radiation mechanism of slot antenna with diagram. (APRIL / MAY 2011) 15.Explain the special features of reflector antenna and discuss on different types of feed used with neat diagram. (APRIL / MAY 2011) 16. With field equivalence principle explain radiation mechanism (MAY / JUNE 2012) 17. Describe the working of slot antenna. What is the terminal impedance of slot antenna (MAY / JUNE 2012) 18. What is reflector antenna? With necessary diagrams, explain parabolic reflector antenna and its different types of feeding systems. (MAY / JUNE 2012) 19. How is aperture blockage in reflector antennas avoided? (MAY / JUNE 2012) UNIT IV SPESIAL ANTENNAS AND ANTENNA MEASUREMENTS 1. Write a note on helical antenna and helical geometry. 2. Derive the relation between circumference spacing turn lengths and pitch angle of a helix. 3. Show the limiting cases of a helix when :

5 i. Spacing is zero. ii. Diameter is zero. 4. Explain helix modes of operation. 5. Explain the following parameters of monoflilar axial helix antenna: (a) Gain (b) Bam width (c) Impedance. 6. Describe the operation of Yagi Uda antenna with neat diagram. 7. Describe the construction, principle of operation and design of Rhombic Antenna. Also mention its advantages and disadvantages. 8. Write short note on Yagi-Uda array antenna. 9. i) Draw the structure of LPDA with main regions of operation. ii) How is analysis of log periodic antenna done? iii) Derive the parameters that describe the configuration of LPDA. 10. Explain the operation of spiral antenna. 11. Explain the operation of Microstrip patch antenna with neat diagram. 12. With neat diagram explain the operation of rhombic antenna with neat diagram. Also explain its design. 13. Explain the various ranges of antenna measurements in detail. 14. Explain absolute gain measurement and gain transfer method in detail. 15. Explain radiation pattern measurement in detail. 16. With neat sketch, explain the construction and operation of Helical antenna. (APRIL / MAY 2011) 17. Explain the principal of operation of Yagi-Uda array with neat schematic diagram. (APRIL / MAY 2011) 18. With neat sketch, explain the construction and operation of Multielement Yagi-Uda antenna. (NOV. / DEC. 2011). 19. With necessary illustrations explain the radiation characteristics of microstrip antenna and mention its possible applications. (NOV. / DEC. 2011). 20. Discuss briefly on construction and working principle of turnstile antenna. (MAY / JUNE 2012) With suitable geometry describe the design of a log periodic dipole array. (MAY / JUNE 2012) Explain in detail about: (MAY / JUNE 2012) i). Directivity measurement ii). Gain measurement UNIT V RADIO WAVE PROPAGATION 1. Write short notes on: i. Surface wave tilting. ii. Space wave propagation. iii. Ionosphere propagation. iv. Structure of ionosphere. v. Sky wave propagation. vi. Duct propagation. 2. Obtain an expression for space wave field component taking into account a direct wave field component and a reflected wave from the earth surface. 3. Derive an expression for refractive index of ionosphere. 4. Explain the following and derive the relevant expressions: i. Critical frequency.

6 ii. Maximum usable frequency. iii. Virtual height. iv. Skip distance. 5. Briefly explain characteristics of different ionized layers in ionospheric propagation. 6. Calculate the critical frequency for a medium at which the wave reflects if the maximum electron density is 1.24 X 10 6 electrons/cm Which propagation will aid the following frequencies and why. (a) 120KHz. (b) 10MHz. (c) 300 MHz. (d) 30GHz. 8. Estimate the surface wave tilt in degrees over an earth of 12mm conductivity and relative permittivity 20 at a wave length of 300m. 9. A transmitter radiates 100Wof power at a frequency of 50MHz, so that space wave propagation takes place. The transmitting antenna has a gain of 5 and its height is 50m. The receiving antenna height is 2m. It is estimated that field strength of 100 V/m is required to give a satisfactory result. Calculate the distance between transmitter and receiver. 10. Explain the electrical properties of Ionosphere. 11. Explain the effect of earth s magnetic field. 12. Explain Faraday rotation and whistlers. Also explain wave propagation in complex environment. 13. Explain the mechanism of ionosphere propagation. (APRIL / MAY 2011) 14. How does the earth affect ground wave propagation? (APRIL / MAY 2011) 15. Explain the terms (APRIL / MAY 2011), (NOV. / DEC. 2011). i). Optimum working frequency. ii). Duct propagation. iii). Virtual height iv). Skip distance 16. Discuss the effects of Earth s magnetic field on ionosphere radio wave propagation(april / MAY 2011) 17. Explain the important features of ground wave propagation. ( NOV. / DEC. 2011). 18. Describe the structure of the atmosphere and specify the factors affecting the radio wave propagation. (MAY / JUNE 2012) 19.Explain in detail about effect of earth s magnetic field on radio wave propagation. (MAY / JUNE 2012)

### BHARATHIDASAN ENGINEERING COLLEGE NATTARAMPALLI Frequently Asked Questions (FAQ) Unit 1

BHARATHIDASAN ENGINEERING COLLEGE NATTARAMPALLI 635854 Frequently Asked Questions (FAQ) Unit 1 Degree / Branch : B.E / ECE Sem / Year : 3 rd / 6 th Sub Name : Antennas & Wave Propagation Sub Code : EC6602

### KINGS COLLEGE OF ENGINEERING. DEPARTMENT OF ELECTRONICS AND COMMUNICATION ENGINEERING Academic Year (Even Sem) QUESTION BANK (AUTT-R2008)

KINGS COLLEGE OF ENGINEERING DEPARTMENT OF ELECTRONICS AND COMMUNICATION ENGINEERING Academic Year 2012-2013(Even Sem) QUESTION BANK (AUTT-R2008) SUBJECT CODE /NAME: EC 1352 / ANTENNEA AND WAVE PROPAGATION

### KINGS COLLEGE OF ENGINEERING DEPARTMENT OF ELECTRONICS AND COMMUNICATION ENGINEERING QUESTION BANK

KINGS COLLEGE OF ENGINEERING DEPARTMENT OF ELECTRONICS AND COMMUNICATION ENGINEERING QUESTION BANK SUB.NAME : ANTENNAS & WAVE PROPAGATION SUB CODE : EC 1352 YEAR : III SEMESTER : VI UNIT I: ANTENNA FUNDAMENTALS

### Antennas & wave Propagation ASSIGNMENT-I

Shri Vishnu Engineering College for Women :: Bhimavaram Department of Electronics & Communication Engineering Antennas & wave Propagation 1. Define the terms: i. Antenna Aperture ii. Beam Width iii. Aperture

### DEPARTMENT OF ELECTRONICS & COMMUNICATION ENGINEERING SUBJECT NAME:

Chendu College of Engineering & Technology (Approved by AICTE, New Delhi and Affiliated to Anna University) Zamin Endathur, Madurantakam, Kancheepuram, District 603311. DEPARTMENT OF ELECTRONICS & COMMUNICATION

### DMI COLLEGE OF ENGINEERING, CHENNAI EC ANTENNAS AND WAVE PROPAGATION PART A (2 MARKS)

1. Define an antenna. DEPARTMENT OF ELECTRONICS AND COMMUNICATION ENGINEERING EC6602 - ANTENNAS AND WAVE PROPAGATION UNIT I : FUNDAMENTALS OF RADIATION PART A (2 MARKS) Antenna is a transition device or

### 1. What are the applications of loop antenna? (May2011) 2. Define Pattern Multiplication (May2011)

UNIT-II WIRE ANTENNAS AND ANTENNA ARRAYS 1. What are the applications of loop antenna? (May2011) 2. Define Pattern Multiplication (May2011) 3. A uniform linear array contains 50 isotropic radiation with

### S.R.M. Institute of Science & Technology Deemed University School of Electronics & Communication Engineering

S.R.M. Institute of Science & Technology Deemed University School of Electronics & Communication Engineering Question Bank Subject Code : EC401 Subject Name : Antennas and Wave Propagation Year & Sem :

### INSTITUTE OF AERONAUTICAL ENGINEERING Dundigal, Hyderabad ELECTRONICS AND COMMUNIACTION ENGINEERING QUESTION BANK

INSTITUTE OF AERONAUTICAL ENGINEERING Dundigal, Hyderabad - 500 04 ELECTRONICS AND COMMUNIACTION ENGINEERING QUESTION BANK Course Name : Antennas and Wave Propagation (AWP) Course Code : A50418 Class :

VALLIAMMAI ENGINEERING COLLEGE SRM Nagar, Kattankulathur 603 203. DEPARTMENT OF ELECTRONICS & COMMUNICATION ENGINEERING QUESTION BANK SUBJECT : EC6602 ANTENNA AND WAVE PROPOGATION SEM / YEAR : VI / III

### ANTENNA THEORY. Analysis and Design. CONSTANTINE A. BALANIS Arizona State University. JOHN WILEY & SONS New York Chichester Brisbane Toronto Singapore

ANTENNA THEORY Analysis and Design CONSTANTINE A. BALANIS Arizona State University JOHN WILEY & SONS New York Chichester Brisbane Toronto Singapore Contents Preface xv Chapter 1 Antennas 1 1.1 Introduction

### HHTEHHH THEORY ANALYSIS AND DESIGN. CONSTANTINE A. BALANIS Arizona State University

HHTEHHH THEORY ANALYSIS AND DESIGN CONSTANTINE A. BALANIS Arizona State University JOHN WILEY & SONS, INC. New York Chichester Brisbane Toronto Singapore Contents Preface V CHAPTER 1 ANTENNAS 1.1 Introduction

### UNIT Write short notes on travelling wave antenna? Ans: Travelling Wave Antenna

UNIT 4 1. Write short notes on travelling wave antenna? Travelling Wave Antenna Travelling wave or non-resonant or aperiodic antennas are those antennas in which there is no reflected wave i.e., standing

### Travelling Wave, Broadband, and Frequency Independent Antennas. EE-4382/ Antenna Engineering

Travelling Wave, Broadband, and Frequency Independent Antennas EE-4382/5306 - Antenna Engineering Outline Traveling Wave Antennas Introduction Traveling Wave Antennas: Long Wire, V Antenna, Rhombic Antenna

### ANTENNAS AND WAVE PROPAGATION EC602

ANTENNAS AND WAVE PROPAGATION EC602 B.Tech Electronics & Communication Engineering, Semester VI INSTITUTE OF TECHNOLOGY NIRMA UNIVERSITY 1 Lesson Planning (L-3,P-2,C-4) Chapter No. Name Hours 1. Basic

### PANDIAN SARASWATHI YADAV ENGINEERING COLLEGE. Department of Electronics and Communication Engineering FUNDAMENTALS OF RADIATION. Unit-I.

PANDIAN SARASWATHI YADAV ENGINEERING COLLEGE Department of Electronics and Communication Engineering Subject Code/Subject: EC6602 ANTENNA AND WAVE PROPAGATION Branch/Year/Semester: ECE / III / 06 Regulation

### EMG4066: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

### MARIA COLLEGE OF ENGINEERING AND TECHNOLOGY, ATTOOR

MARIA COLLEGE OF ENGINEERING AND TECHNOLOGY, ATTOOR DEPARTMENT OF ELECTRONICS AND COMMUNICATION ENGINEERING ANTENNAS AND WAVE PROPOGATION 2 MARKS QUESTIONS & ANSWERS 1. Define an antenna. Unit.1 Antenna

### MICROWAVE ENGINEERING MCQs

MICROWAVE ENGINEERING MCQs 1) If an antenna draws 12 A current and radiates 4 kw, then what will be its radiation resistance? a. 22.22 ohm b. 27.77 ohm c. 33.33 ohm d. 39.77 ohm 2) Which mode of radiation

### An Introduction to Antennas

May 11, 010 An Introduction to Antennas 1 Outline Antenna definition Main parameters of an antenna Types of antennas Antenna radiation (oynting vector) Radiation pattern Far-field distance, directivity,

### ANTENNA THEORY ANALYSIS AND DESIGN

ANTENNA THEORY ANALYSIS AND DESIGN THIRD EDITION Constantine A. Balanis WILEY- INTERSCIENCE A JOHN WILEY & SONS. INC.. PUBLICATION ial iel pi ial ial ial IBl ial ial ial pi Sl Contents Preface Xlll 1 Antennas

### UNIT I RADIATION FROM WIRE ANTENNAS PART A

1.What is a Short Dipole? UNIT I RADIATION FROM WIRE ANTENNAS PART A A short dipole is one in which the field is oscillating because of the oscillating voltage and current. It is called so, because the

### RADIATION PATTERNS. The half-power (-3 db) beamwidth is a measure of the directivity of the antenna.

RADIATION PATTERNS The radiation pattern is a graphical depiction of the relative field strength transmitted from or received by the antenna. Antenna radiation patterns are taken at one frequency, one

### Aperture Antennas. Reflectors, horns. High Gain Nearly real input impedance. Huygens Principle

Antennas 97 Aperture Antennas Reflectors, horns. High Gain Nearly real input impedance Huygens Principle Each point of a wave front is a secondary source of spherical waves. 97 Antennas 98 Equivalence

### SI TECHNICAL 2018 UNIT IV QUESTION BANK

SI TECHNICAL 2018 UNIT IV QUESTION BANK 1. In what range of frequencies are most omnidirectional horizontally polarized antennas used? A. VHF, UHF B. VLF, LF C. SH, EHF D. MF, HF 2. If the current ratios

### Final Examination. 22 April 2013, 9:30 12:00. Examiner: Prof. Sean V. Hum. All non-programmable electronic calculators are allowed.

UNIVERSITY OF TORONTO FACULTY OF APPLIED SCIENCE AND ENGINEERING The Edward S. Rogers Sr. Department of Electrical and Computer Engineering ECE 422H1S RADIO AND MICROWAVE WIRELESS SYSTEMS Final Examination

### Half-Wave Dipole. Radiation Resistance. Antenna Efficiency

Antennas Simple Antennas Isotropic radiator is the simplest antenna mathematically Radiates all the power supplied to it, equally in all directions Theoretical only, can t be built Useful as a reference:

### CHAPTER 5 THEORY AND TYPES OF ANTENNAS. 5.1 Introduction

CHAPTER 5 THEORY AND TYPES OF ANTENNAS 5.1 Introduction Antenna is an integral part of wireless communication systems, considered as an interface between transmission line and free space [16]. Antenna

### Antennas 1. Antennas

Antennas Antennas 1! Grading policy. " Weekly Homework 40%. " Midterm Exam 30%. " Project 30%.! Office hour: 3:10 ~ 4:00 pm, Monday.! Textbook: Warren L. Stutzman and Gary A. Thiele, Antenna Theory and

1 Chapter 4 Learning Outcome At the end of this chapter student should able to: To design and evaluate various antenna to meet application requirements for Loops antenna Helix antenna Yagi Uda antenna

### Antenna 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,

### CONTENTS. Note Concerning the Numbering of Equations, Figures, and References; Notation, xxi. A Bridge from Mathematics to Engineering in Antenna

CONTENTS Note Concerning the Numbering of Equations, Figures, and References; Notation, xxi Introduction: Theory, 1 A Bridge from Mathematics to Engineering in Antenna Isolated Antennas 1. Free Oscillations,

### The magnetic surface current density is defined in terms of the electric field at an aperture as follows: 2E n (6.1)

Chapter 6. Aperture antennas Antennas where radiation occurs from an open aperture are called aperture antennas. xamples include slot antennas, open-ended waveguides, rectangular and circular horn antennas,

### Chapter 1 - Antennas

EE 483/583/L Antennas for Wireless Communications 1 / 8 1.1 Introduction Chapter 1 - Antennas Definition - That part of a transmitting or receiving system that is designed to radiate or to receive electromagnetic

### 1. Explain the basic geometry and elements of Yagi-Uda antenna.

Benha University Faculty of Engineering- Shoubra Electrical Engineering Department Fourth Year (Communications & Electronics) Final-Term Exam Date: Tuesday 10/5/2016 ECE 424: Lab (4) Duration : 2 Hrs Answer

### ANTENNAS AND WAVE PROPAGATION OBJECTIVE QUESTIONS

ANTENNAS AND WAVE PROPAGATION OBJECTIVE QUESTIONS UNIT I 1. An antenna is (a) (a) Inductive (b) Capacitive (c) resistive above its resonance frequency (d) none 2. The input impedance of a λ/2 Dipole antenna

### Traveling Wave Antennas

Traveling Wave Antennas Antennas with open-ended wires where the current must go to zero (dipoles, monopoles, etc.) can be characterized as standing wave antennas or resonant antennas. The current on these

### ANTENNAS FROM THEORY TO PRACTICE WILEY. Yi Huang University of Liverpool, UK. Kevin Boyle NXP Semiconductors, UK

ANTENNAS FROM THEORY TO PRACTICE Yi Huang University of Liverpool, UK Kevin Boyle NXP Semiconductors, UK WILEY A John Wiley and Sons, Ltd, Publication Contents Preface Acronyms and Constants xi xiii 1

### EEM.Ant. Antennas and Propagation

EEM.ant/0304/08pg/Req: None 1/8 UNIVERSITY OF SURREY Department of Electronic Engineering MSc EXAMINATION EEM.Ant Antennas and Propagation Duration: 2 Hours Spring 2003/04 READ THESE INSTRUCTIONS Answer

### UNIT Explain the radiation from two-wire. Ans: Radiation from Two wire

UNIT 1 1. Explain the radiation from two-wire. Radiation from Two wire Figure1.1.1 shows a voltage source connected two-wire transmission line which is further connected to an antenna. An electric field

### Antenna Theory and Design

Antenna Theory and Design SECOND EDITION Warren L. Stutzman Gary A. Thiele WILEY Contents Chapter 1 Antenna Fundamentals and Definitions 1 1.1 Introduction 1 1.2 How Antennas Radiate 4 1.3 Overview of

### UNIT-3. Ans: Arrays of two point sources with equal amplitude and opposite phase:

`` UNIT-3 1. Derive the field components and draw the field pattern for two point source with spacing of λ/2 and fed with current of equal n magnitude but out of phase by 180 0? Ans: Arrays of two point

### It is clear in Figures a and b that in some very specific directions there are zeros, or nulls, in the pattern indicating no radiation.

Unit 2 - Point Sources and Arrays Radiation pattern: The radiation pattern of antenna is a representation (pictorial or mathematical) of the distribution of the power out-flowing (radiated) from the antenna

### KULLIYYAH 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)

### Notes 21 Introduction to Antennas

ECE 3317 Applied Electromagnetic Waves Prof. David R. Jackson Fall 018 Notes 1 Introduction to Antennas 1 Introduction to Antennas Antennas An antenna is a device that is used to transmit and/or receive

### "Natural" Antennas. Mr. Robert Marcus, PE, NCE Dr. Bruce C. Gabrielson, NCE. Security Engineering Services, Inc. PO Box 550 Chesapeake Beach, MD 20732

Published and presented: AFCEA TEMPEST Training Course, Burke, VA, 1992 Introduction "Natural" Antennas Mr. Robert Marcus, PE, NCE Dr. Bruce C. Gabrielson, NCE Security Engineering Services, Inc. PO Box

### Chapter 6 Broadband Antenna. 1. Loops antenna 2. Heliksantenna 3. Yagi uda antenna

Chapter 6 Broadband Antenna 1. Loops antenna 2. Heliksantenna 3. Yagi uda antenna 1 Design A broadband antenna should have acceptable performance (determined by its pattern, gain and/or feed-point impedance)

### RADAR Antennas R A D A R R A D A R S Y S T E M S S Y S T E M S. Lecture DR Sanjeev Kumar Mishra. 2 max

Y T E M Y T E M anjeev Kumar Mishra Lecture 17-20 ntennas i p r t t ne L L L N kt BF PG 1 0 3 2 max 4 ) / ( 4 2 Y T E M ntenna: n antenna is an electromagnetic radiator, a sensor, a transducer and an impedance

### The Basics of Patch Antennas, Updated

The Basics of Patch Antennas, Updated By D. Orban and G.J.K. Moernaut, Orban Microwave Products www.orbanmicrowave.com Introduction This article introduces the basic concepts of patch antennas. We use

### Resonant Antennas: Wires and Patches

Resonant Antennas: Wires and Patches Dipole Antennas Antenna 48 Current distribution approximation Un-normalized pattern: and Antenna 49 Radiating power: For half-wave dipole and,, or at exact resonance.

### Newsletter 2.0. Antenna Magus version 2.0 released! New Array synthesis tool. April 2010

Newsletter 2.0 April 2010 Antenna Magus version 2.0 released! We are very proud to announce the second major release of Antenna Magus, Version 2.0. Looking back over the past 11 months since release 1.0

### ( ) 2 ( ) 3 ( ) + 1. cos! t " R / v p 1 ) H =! ˆ" I #l ' \$ 2 ' 2 (18.20) * + ! ˆ& "I #l ' \$ 2 ' , ( βr << 1. "l ' E! ˆR I 0"l ' cos& + ˆ& 0

Summary Chapter 8. This last chapter treats the problem of antennas and radiation from antennas. We start with the elemental electric dipole and introduce the idea of retardation of potentials and fields

### Chapter 2. Fundamental Properties of Antennas. ECE 5318/6352 Antenna Engineering Dr. Stuart Long

Chapter Fundamental Properties of Antennas ECE 5318/635 Antenna Engineering Dr. Stuart Long 1 IEEE Standards Definition of Terms for Antennas IEEE Standard 145-1983 IEEE Transactions on Antennas and Propagation

### Antenna & Wave Propagation (Subject Code: 7EC1)

COMPUCOM INSTITUTE OF TECHNOLOGY & MANAGEMENT, JAIPUR (DEPARTMENT OF ELECTRONICS & COMMUNICATION) Notes Antenna & Wave Propagation (Subject Code: 7EC1) Prepared By: Raj Kumar Jain Class: B. Tech. IV Year,

### Antennas Prof. Girish Kumar Department of Electrical Engineering India Institute of Technology, Bombay. Module - 1 Lecture - 1 Antennas Introduction-I

Antennas Prof. Girish Kumar Department of Electrical Engineering India Institute of Technology, Bombay Module - 1 Lecture - 1 Antennas Introduction-I Hello everyone. Welcome to the exciting world of antennas.

### Antennas and Propagation. Chapter 4: Antenna Types

Antennas and Propagation : Antenna Types 4.4 Aperture Antennas High microwave frequencies Thin wires and dielectrics cause loss Coaxial lines: may have 10dB per meter Waveguides often used instead Aperture

### Antenna Theory. Introduction

1 Introduction Antenna Theory Antennas are device that designed to radiate electromagnetic energy efficiently in a prescribed manner. It is the current distributions on the antennas that produce the radiation.

### Rec. ITU-R F RECOMMENDATION ITU-R F *

Rec. ITU-R F.162-3 1 RECOMMENDATION ITU-R F.162-3 * Rec. ITU-R F.162-3 USE OF DIRECTIONAL TRANSMITTING ANTENNAS IN THE FIXED SERVICE OPERATING IN BANDS BELOW ABOUT 30 MHz (Question 150/9) (1953-1956-1966-1970-1992)

LE/ESSE4360 - Payload Design 4.3 Communications Satellite Payload - Hardware Elements Earth, Moon, Mars, and Beyond Dr. Jinjun Shan, Professor of Space Engineering Department of Earth and Space Science

### Antenna Parameters. Ranga Rodrigo. University of Moratuwa. December 15, 2008

Antenna Parameters Ranga Rodrigo University of Moratuwa December 15, 2008 Ranga Rodrigo (University of Moratuwa) Antenna Parameters December 15, 2008 1 / 47 Summary of Last Week s Lecture 90 o Radiation

### Antenna Engineering Lecture 3: Basic Antenna Parameters

Antenna Engineering Lecture 3: Basic Antenna Parameters ELC 405a Fall 2011 Department of Electronics and Communications Engineering Faculty of Engineering Cairo University 2 Outline 1 Radiation Pattern

### Newsletter 5.4. New Antennas. The profiled horns. Antenna Magus Version 5.4 released! May 2015

Newsletter 5.4 May 215 Antenna Magus Version 5.4 released! Version 5.4 sees the release of eleven new antennas (taking the total number of antennas to 277) as well as a number of new features, improvements

### Antenna Design Seminar

Antenna Design Seminar What we are going to cover This seminar will cover the design concepts of a variety of broadcast antennas that relates to the design of TV and FM antennas. We will first look at

### CHAPTER 8 ANTENNAS 1

CHAPTER 8 ANTENNAS 1 2 Antennas A good antenna works A bad antenna is a waste of time & money Antenna systems can be very inexpensive and simple They can also be very expensive 3 Antenna Considerations

### Antenna Fundamentals. Microwave Engineering EE 172. Dr. Ray Kwok

Antenna Fundamentals Microwave Engineering EE 172 Dr. Ray Kwok Reference Antenna Theory and Design Warran Stutzman, Gary Thiele, Wiley & Sons (1981) Microstrip Antennas Bahl & Bhartia, Artech House (1980)

### DEPARTMENT OF ELECTRONICS AND COMMUNICATION ENGINEERING EC6602 ANTENNA AND WAVE PROPAGATION UNIT-1 INTRODUCTION TO ANTENNA PARAMETERS PART-A 1.

DEPARTMENT OF ELECTRONICS AND COMMUNICATION ENGINEERING EC6602 ANTENNA AND WAVE PROPAGATION UNIT-1 INTRODUCTION TO ANTENNA PARAMETERS PART-A 1. Define an antenna. Antenna is a transition device or a transducer

### Fourth Year Antenna Lab

Fourth Year Antenna Lab Name : Student ID#: Contents 1 Wire Antennas 1 1.1 Objectives................................................. 1 1.2 Equipments................................................ 1

### UNIVERSITY OF UTAH ELECTRICAL AND COMPUTER ENGINEERING DEPARTMENT. ECE 5324/6324 ANTENNA THEORY AND DESIGN Spring 2013

UNIVERSITY OF UTAH ELECTRICAL AND COMPUTER ENGINEERING DEPARTMENT ECE 5324/6324 ANTENNA THEORY AND DESIGN Spring 2013 Instructor: O. P. Gandhi Office: MEB 4508 1. This is an engineering course which deals

### Continuous Arrays Page 1. Continuous Arrays. 1 One-dimensional Continuous Arrays. Figure 1: Continuous array N 1 AF = I m e jkz cos θ (1) m=0

Continuous Arrays Page 1 Continuous Arrays 1 One-dimensional Continuous Arrays Consider the 2-element array we studied earlier where each element is driven by the same signal (a uniform excited array),

### Newsletter 3.1. Antenna Magus version 3.1 released! New antennas in the database. Square pin-fed septum horn. July 2011

Newsletter 3.1 July 2011 Antenna Magus version 3.1 released! Antenna Magus 3.0 was such a feature laden release that not all of the new features could be mentioned in the newsletter, so we decided to rather

### A LABORATORY COURSE ON ANTENNA MEASUREMENT

A LABORATORY COURSE ON ANTENNA MEASUREMENT Samuel Parker Raytheon Systems Company, 2000 East Imperial Highway RE/R02/V509, El Segundo, CA 90245 Dean Arakaki Electrical Engineering Department, California

### Antenna Theory. Wire Antennas

Antenna Theory Wire Antennas Monopole Antenna Long Wire or Traveling wave Antennas Yagi Uda Antenna Prof. D. Kannadassan Reference: C. A. Balanis, J.D. Krauss Monopole antenna Image theory, an intro A

Amateur Radio License Propagation and Antennas Todays Topics Propagation Antennas Propagation Modes Ground wave Low HF and below, ground acts as waveguide Line-of-Sight (LOS) VHF and above, radio waves

### Antenna Theory EELE 5445

Antenna Theory EELE 5445 Lecture 6: Dipole Antenna Dr. Mohamed Ouda Electrical Engineering Department Islamic University of Gaza 2013 The dipole and the monopole The dipole and the monopole are arguably

### Dr. John S. Seybold. November 9, IEEE Melbourne COM/SP AP/MTT Chapters

Antennas Dr. John S. Seybold November 9, 004 IEEE Melbourne COM/SP AP/MTT Chapters Introduction The antenna is the air interface of a communication system An antenna is an electrical conductor or system

### Note: For. interested in. Radiation. A field pattern. H and a phase

Lecture-3 Antenna parameters: (Continued ) 1.4.3 Radiated Power With this information, now we are in a position to calculate the total radiated power from an antenna. Mathematically it can be written as

Chapter 15: Radio-Wave Propagation MULTIPLE CHOICE 1. Radio waves were first predicted mathematically by: a. Armstrong c. Maxwell b. Hertz d. Marconi 2. Radio waves were first demonstrated experimentally

Introduction to Radar Systems Radar Antennas Radar Antennas - 1 Disclaimer of Endorsement and Liability The video courseware and accompanying viewgraphs presented on this server were prepared as an account

### Antenna Trainer EAN. Technical Teaching Equipment INTRODUCTION

Antenna Trainer EAN Technical Teaching Equipment Products Products range Units 3.-Communications INTRODUCTION Antennas are the main element of aerial communications. They are the transition between a transmission

### RF AND MICROWAVE ENGINEERING

RF AND MICROWAVE ENGINEERING FUNDAMENTALS OF WIRELESS COMMUNICATIONS Frank Gustrau Dortmund University of Applied Sciences and Arts, Germany WILEY A John Wiley & Sons, Ltd., Publication Preface List of

### Chapter 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.

### Large Loop Antennas. Special thanks to graduate students of ECSE 593 class, Winter 2007: Yasha Khatamian, Lin Han, Ruiming Chen

Large Loop Antennas Special thanks to graduate students of ECSE 593 class, Winter 2007: Yasha Khatamian, Lin Han, Ruiming Chen McGill University, ECSE 405 Antennas, Fall 2009, Prof. M. Popovic 1. History

### Loop and Slot Antennas

Loop and Slot Antennas Prof. Girish Kumar Electrical Engineering Department, IIT Bombay gkumar@ee.iitb.ac.in (022) 2576 7436 Loop Antenna Loop antennas can have circular, rectangular, triangular or any

### The Stub Loaded Helix: A Reduced Size Helical Antenna

The Stub Loaded Helix: A Reduced Size Helical Antenna R. Michael Barts Dissertation submitted to the Faculty of the Virginia Polytechnic Institute and State University in partial fulfillment of the requirements

Broadband Microstrip Antennas Prof. Girish Kumar Electrical Engineering Department, IIT Bombay gkumar@ee.iitb.ac.in (022) 2576 7436 MSA BW Variation with h and f MSA Broadband Using Multi-Resonators Broad

### UNIVERSITI MALAYSIA PERLIS

UNIVERSITI MALAYSIA PERLIS SCHOOL OF COMPUTER & COMMUNICATIONS ENGINEERING EKT 341 LABORATORY MODULE LAB 2 Antenna Characteristic 1 Measurement of Radiation Pattern, Gain, VSWR, input impedance and reflection

### (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

### What does reciprocity mean

Antennas Definition of antenna: A device for converting electromagnetic radiation in space into electrical currents in conductors or vice-versa. Radio telescopes are antennas Reciprocity says we can treat

### # DEFINITIONS TERMS. 2) Electrical energy that has escaped into free space. Electromagnetic wave

CHAPTER 14 ELECTROMAGNETIC WAVE PROPAGATION # DEFINITIONS TERMS 1) Propagation of electromagnetic waves often called radio-frequency (RF) propagation or simply radio propagation. Free-space 2) Electrical

### Millimetre-wave Phased Array Antennas for Mobile Terminals

Millimetre-wave Phased Array Antennas for Mobile Terminals Master s Thesis Alberto Hernández Escobar Aalborg University Department of Electronic Systems Fredrik Bajers Vej 7B DK-9220 Aalborg Contents

### UNIT V PROPAGATION The three basic types of propagation: Sky Wave Propagation: Space Wave Propagation: Ground Wave Propagation: Propagation of Waves

UNIT V PROPAGATION The three basic types of propagation: Ground wave, space wave and sky wave propagation. Sky Wave Propagation: Structure of the ionosphere Effective dielectric constant of ionized region

### IMPROVEMENT OF YAGI UDA ANTENNA RADIATION PATTERN

International Journal of Mechanical Engineering and Technology (IJMET) Volume 8, Issue 7, July 2017, pp. 636 641, Article ID: IJMET_08_07_071 Available online at http://www.iaeme.com/ijmet/issues.asp?jtype=ijmet&vtype=8&itype=7

### Radiation Analysis of Phased Antenna Arrays with Differentially Feeding Networks towards Better Directivity

Radiation Analysis of Phased Antenna Arrays with Differentially Feeding Networks towards Better Directivity Manohar R 1, Sophiya Susan S 2 1 PG Student, Department of Telecommunication Engineering, CMR

### SYLLABUS. Antennas and Propagation PART- A

SYLLABUS PART- A UNIT 1: ANTENNA BASICS Introduction, basic antenna parameters, patterns, beam area, radiation intensity, beam efficiency, directivity and gain, antenna apertures, effective height, bandwidth,

### DESIGN OF PRINTED YAGI ANTENNA WITH ADDI- TIONAL DRIVEN ELEMENT FOR WLAN APPLICA- TIONS

Progress In Electromagnetics Research C, Vol. 37, 67 81, 013 DESIGN OF PRINTED YAGI ANTENNA WITH ADDI- TIONAL DRIVEN ELEMENT FOR WLAN APPLICA- TIONS Jafar R. Mohammed * Communication Engineering Department,

### UNIT - IV SPECIAL ANTENNAS AND ANTENNA MEASUREMENTS. B.Hemalatha - AP/ECE

UNIT - IV SPECIAL ANTENNAS AND ANTENNA MEASUREMENTS 1 Elementary Antennas low cost flexible solutions Transmission Line Antenna R=Z 0 Long Wire Antenna effective wideband antenna length l = several wavelengths

### ECE 4370: Antenna Engineering TEST 2 (Fall 2012)

Name: GTID: ECE 4370: Antenna Engineering TEST 2 (Fall 2012) Please read all instructions before continuing with the test. This is a closed notes, closed book, closed friend, open mind test. On your desk

### ANTENNA INTRODUCTION / BASICS

ANTENNA INTRODUCTION / BASICS RULES OF THUMB: 1. The Gain of an antenna with losses is given by: 2. Gain of rectangular X-Band Aperture G = 1.4 LW L = length of aperture in cm Where: W = width of aperture