Yagi Antenna Tutorial. Copyright K7JLT 1
|
|
- Lillian McCoy
- 6 years ago
- Views:
Transcription
1 Yagi Antenna Tutorial Copyright K7JLT
2 Yagi: The Man & Developments In the 920 s two Japanese electrical engineers, Hidetsugu Yagi and Shintaro Uda at Tohoku University in Sendai Japan, investigated ways to improve transmitted short wave signals. The investigation started with what we now call a dipole antenna. As the investigation continued it was found that additional wire elements could improve the strength of the transmitted signal. The resulting antenna received a Japanese patent in 926 and a U.S. patented in 932. This antenna is now known as a Yagi. One of the few electronic devises that is known by the inventors name. Hidetsugu Yagi authored many papers and received patents in microwave power generation before his death in 976. Copyright K7JLT 2
3 Yagi Antennas What s a Yagi Antenna? As we have learned a Yagi starts with a dipole. A Yagi antenna then adds additional elements that uses parasitic coupling to the dipole to increase antenna gain. A Yagi antenna has at least driven and or more un-driven elements. All Yagi elements are parallel to one another. Copyright K7JLT 3
4 Yagi Antennas What s parasitic coupling? Parasitic coupling is where a antenna element receives energy from a driven element (dipole) and re-radiates this energy. The act of receiving of energy from the driven element is known is also known as mutual coupling where a two-way influence occurs between elements. The element diameter, length and distance between elements effects the amount coupling and radiation. Elements longer than the driven element are called reflectors and shorter elements are called directors. Copyright K7JLT 4
5 Yagi Designs There are thousands of Yagi Designs, so for consistency in this presentation, the ARRL Antenna Handbook 2 st Edition Medium Duty Yagi s designed by N6BV have been chosen. These Yagi were optimized for Gain, Front-to-Rear Ratio and Bandwidth allowing consistency between antennas for comparison. Copyright K7JLT 5
6 First let s look at the relation between the Yagi Antenna and the ground, where the antenna is mounted on a tower of variable height. Copyright K7JLT 6
7 2 Element 20 Meter Yagi Boom Length 8 Foot Copyright K7JLT 7
8 2 Element 20 Meter Yagi 20 on 20 Meters /4 /2 Copyright K7JLT 8
9 2 Element 20 Meter Yagi At 20 Feet /4 /2 Copyright K7JLT 9
10 2 Element 20 Meter Yagi At 30 Feet /4 /2 Copyright K7JLT 0
11 2 Element 20 Meter Yagi At 40 Feet /4 /2 Copyright K7JLT
12 2 Element 20 Meter Yagi At 50 Feet /4 /2 Copyright K7JLT 2
13 2 Element 20 Meter Yagi At 60 Feet /4 /2 Copyright K7JLT 3
14 2 Element 20 Meter Yagi At 70 Feet /4 /2 Copyright K7JLT 4
15 2 Element 20 Meter Yagi At 80 Feet /4 /2 Copyright K7JLT 5
16 2 Element 20 Meter Yagi At 90 Feet /4 /2 Copyright K7JLT 6
17 2 Element 20 Meter Yagi At 00 Feet /4 /2 Copyright K7JLT 7
18 2 Element 20 Meter Yagi SWR of 00 ft. Yagi at each height from 20 to 00 feet At 20 Feet 40 Feet 60 Feet 80 Feet and 00 Feet /4 /2 Copyright K7JLT 8
19 2 Element 20 Meter Yagi At 00 Feet With Max 37 Feet Gain ⁰ 3 db EL BW 0⁰ /4 /2 Copyright K7JLT 9
20 2 Element 20 Meter Yagi Gain ⁰ 3 db AZ BW 69.8⁰ F/B.95 db Copyright K7JLT 20
21 3 Element 20 Meter Yagi Boom Length 6 Feet Copyright K7JLT 2
22 3 Element 20 Meter Yagi 20 on 20 Meters /4 /2 Copyright K7JLT 22
23 3 Element 20 Meter Yagi At 20 Feet /4 /2 Copyright K7JLT 23
24 3 Element 20 Meter Yagi At 30 Feet /4 /2 Copyright K7JLT 24
25 3 Element 20 Meter Yagi At 40 Feet /4 /2 Copyright K7JLT 25
26 3 Element 20 Meter Yagi At 50 Feet /4 /2 Copyright K7JLT 26
27 3 Element 20 Meter Yagi At 60 Feet /4 /2 Copyright K7JLT 27
28 3 Element 20 Meter Yagi At 70 Feet /4 /2 Copyright K7JLT 28
29 3 Element 20 Meter Yagi At 80 Feet /4 /2 Copyright K7JLT 29
30 3 Element 20 Meter Yagi At 90 Feet /4 /2 Copyright K7JLT 30
31 3 Element 20 Meter Yagi At 00 Feet /4 /2 Copyright K7JLT 3
32 3 Element 20 Meter Yagi Yagi at each height from 20 to 00 feet At 20 Feet 40 Feet 60 Feet 80 Feet and 00 Feet /4 /2 Copyright K7JLT 32
33 3 Element 20 Meter Yagi At 00 Feet With Max 37 Feet Gain ⁰ 3 db EL BW 9.9⁰ /4 /2 Copyright K7JLT 33
34 3 Element 20 Meter Yagi Gain ⁰ 3 db Az BW 66.6⁰ F/B 35.7 db Copyright K7JLT 34
35 4 Element 20 Meter Yagi Boom Length 26 Feet Copyright K7JLT 35
36 4 Element 20 Meter Yagi 20 on 20 Meters /4 /2 Copyright K7JLT 36
37 4 Element 20 Meter Yagi At 20 Feet /4 /2 Copyright K7JLT 37
38 4 Element 20 Meter Yagi At 30 Feet /4 /2 Copyright K7JLT 38
39 4 Element 20 Meter Yagi At 40 Feet /4 /2 Copyright K7JLT 39
40 4 Element 20 Meter Yagi At 50 Feet /4 /2 Copyright K7JLT 40
41 4 Element 20 Meter Yagi At 60 Feet /4 /2 Copyright K7JLT 4
42 4 Element 20 Meter Yagi At 70 Feet /4 /2 Copyright K7JLT 42
43 4 Element 20 Meter Yagi At 80 Feet /4 /2 Copyright K7JLT 43
44 4 Element 20 Meter Yagi At 90 Feet /4 /2 Copyright K7JLT 44
45 4 Element 20 Meter Yagi At 00 Feet /4 /2 Copyright K7JLT 45
46 4 Element 20 Meter Yagi Yagi at each height from 20 to 00 feet At 20 Feet 40 Feet 60 Feet 80 Feet and 00 Feet /4 /2 Copyright K7JLT 46
47 4 Element 20 Meter Yagi At 00 Feet With Max 37 Feet Gain ⁰ 3 db EL BW 9.9⁰ /4 /2 Copyright K7JLT 47
48 4 Element 20 Meter Yagi Gain ⁰ 3 db AZ BW 6.7⁰ F/B 2.7 db Copyright K7JLT 48
49 5 Element 20 Meter Yagi Boom Length 48 Feet Copyright K7JLT 49
50 5 Element 20 Meter Yagi 20 on 20 Meters /4 /2 Copyright K7JLT 50
51 5 Element 20 Meter Yagi At 20 Feet /4 /2 Copyright K7JLT 5
52 5 Element 20 Meter Yagi At 30 Feet /4 /2 Copyright K7JLT 52
53 5 Element 20 Meter Yagi At 40 Feet /4 /2 Copyright K7JLT 53
54 5 Element 20 Meter Yagi At 50 Feet /4 /2 Copyright K7JLT 54
55 5 Element 20 Meter Yagi At 60 Feet /4 /2 Copyright K7JLT 55
56 5 Element 20 Meter Yagi At 70 Feet /4 /2 Copyright K7JLT 56
57 5 Element 20 Meter Yagi At 80 Feet /4 /2 Copyright K7JLT 57
58 5 Element 20 Meter Yagi At 90 Feet /4 /2 Copyright K7JLT 58
59 5 Element 20 Meter Yagi At 00 Feet /4 /2 Copyright K7JLT 59
60 5 Element 20 Meter Yagi Yagi at each height from 20 to 00 feet At 20 Feet 40 Feet 60 Feet 80 Feet and 00 Feet /4 /2 Copyright K7JLT 60
61 5 Element 20 Meter Yagi At 00 Feet With Max 37 Feet Gain ⁰ 3 db EL BW 9.9⁰ /4 /2 Copyright K7JLT 6
62 5 Element 20 Meter Yagi Gain ⁰ 3 db AZ BW 52.0⁰ F/B 27.9 db Copyright K7JLT 62
63 6 Element 20 Meter Yagi Boom Length 80 Feet Copyright K7JLT 63
64 6 Element 20 Meter Yagi 20 on 20 Meters /4 /2 Copyright K7JLT 64
65 6 Element 20 Meter Yagi At 20 Feet /4 /2 Copyright K7JLT 65
66 6 Element 20 Meter Yagi At 30 Feet /4 /2 Copyright K7JLT 66
67 6 Element 20 Meter Yagi At 40 Feet /4 /2 Copyright K7JLT 67
68 6 Element 20 Meter Yagi At 50 Feet /4 /2 Copyright K7JLT 68
69 6 Element 20 Meter Yagi At 60 Feet /4 /2 Copyright K7JLT 69
70 6 Element 20 Meter Yagi At 70 Feet /4 /2 Copyright K7JLT 70
71 6 Element 20 Meter Yagi At 80 Feet /4 /2 Copyright K7JLT 7
72 6 Element 20 Meter Yagi At 90 Feet /4 /2 Copyright K7JLT 72
73 6 Element 20 Meter Yagi At 00 Feet /4 /2 Copyright K7JLT 73
74 6 Element 20 Meter Yagi Yagi at each height from 20 to 00 feet At 20 Feet 40 Feet 60 Feet 80 Feet and 00 Feet /4 /2 Copyright K7JLT 74
75 6 Element 20 Meter Yagi At 00 Feet With Max 37 Feet Gain ⁰ 3 db EL BW 9.8⁰ /4 /2 Copyright K7JLT 75
76 6 Element 20 Meter Yagi Gain ⁰ 3 db AZ BW 45⁰ FB 23 db Copyright K7JLT 76
77 Elevation Angle for 20 Meter Yagi 00 Feet 5 Element 5.8 Gain 0⁰ 3 db Az BW 9.9⁰ 4 Element Gain 3.9 0⁰ 3 db Az BW 9.9⁰ 3 Element Gain 2.7 0⁰ 3 db Az BW 9.9⁰ 2 Element Gain.5 0⁰ 3 db Az BW 0⁰ 6 Element Gain 7.2 9⁰ 3 db Az BW 9.8⁰ What is going on? Copyright K7JLT 77
78 Remember from the Dipole Tutorial #2 how antenna lobs changed as elevation increased? Copyright K7JLT 78
79 Here s a quick review of the Dipole Tutorial height slides. Copyright K7JLT 79
80 Radiation Pattern /4 Copyright K7JLT /2 /4
81 Radiation Pattern /4 Copyright K7JLT /2 /4
82 Radiation Pattern /4 Copyright K7JLT /2 /4
83 Radiation Pattern /4 Copyright K7JLT /2 /4
84 Radiation Pattern /4 Copyright K7JLT /2 /4
85 Radiation Pattern /4 Copyright K7JLT /2 /4
86 Radiation Pattern /4 Copyright K7JLT /2 /4
87 Radiation Pattern /4 Copyright K7JLT /2 /4
88 Radiation Pattern /4 Copyright K7JLT /2 /4
89 Radiation Pattern /4 Copyright K7JLT /2 /4
90 Radiation Pattern /4 Copyright K7JLT /2 /4
91 Radiation Pattern /4 Copyright K7JLT /2 /4
92 Radiation Pattern /4 Copyright K7JLT /2 /4
93 Radiation Pattern /4 Copyright K7JLT /2 /4
94 Dipole Radiation Pattern /4 Copyright K7JLT /2 /4
95 Dipole Radiation Pattern Does this lob behavior look similar to the Yagi lobs? /4 Copyright K7JLT /2 /4
96 2 Element 20 Meter Yagi At 00 Feet 00 Feet It s a Match! /4 /2 Copyright K7JLT 96
97 3 Element 20 Meter Yagi At 00 Feet 00 Feet It s a Match! /4 /2 Copyright K7JLT 97
98 4 Element 20 Meter Yagi At 00 Feet 00 Feet It s a Match! /4 /2 Copyright K7JLT 98
99 5 Element 20 Meter Yagi At 00 Feet 00 Feet It s a Match! /4 /2 Copyright K7JLT 99
100 6 Element 20 Meter Yagi At 00 Feet 00 Feet It s a Match! /4 /2 Copyright K7JLT 00
101 So what is happening? The Free space Antenna Pattern + Ground Reflection = Reflected Antenna Pattern Copyright K7JLT 0
102 Yagi General Rules of Thumb Yagi antennas have similar radiation elevation lob patterns for a single height, just the gain of the main lob changes with the number of elements. Copyright K7JLT 02
103 What happens to the antenna patterns on different frequency bands? Copyright K7JLT 03
104 6 Element 5 Meter Yagi At 67 Feet /4 /2 Copyright K7JLT 04
105 6 Element 5 Meter Yagi 20 Meter at 00 Feet 5 Meter at 67 Feet /4 /2 Copyright K7JLT 05
106 6 Element 5 Meter Yagi At 50 Feet /4 /2 Copyright K7JLT 06
107 6 Element 0 Meter Yagi 20 Meter at 00 Feet 0 Meter at 50 Feet /4 /2 Copyright K7JLT 07
108 Yagi General Rules of Thumb Yagi antennas have similar radiation elevation lob patterns for a single height, just the gain of the main lob changes with the number of elements. When height is measured in wavelengths, there is minimal differences between elevation lobs of Yagis with the same number of elements on different bands. Copyright K7JLT 08
109 What about the Azimuth Pattern? Copyright K7JLT 09
110 Max. Azimuth for 20 Meter Yagi 00 Feet 5 Element Yagi Gain ⁰ 3 db AZ BW 52.0⁰ F/B 28 db 4 Element Yagi Gain ⁰ 3 db AZ BW 6.7⁰ F/B 2 db 3 Element Yagi Gain 2,67 9.5⁰ 3 db AZ BW 66.6⁰ F/B 35 db 2 Element Gain ⁰ 3 db AZ BW 69.8⁰ F/B.95 db 6 Element Yagi Gain ⁰ 3 db AZ BW 45⁰ FB 23 db Copyright K7JLT 0
111 Yagi General Rules of Thumb Yagi antennas have similar radiation elevation lob patterns for a single height, just the gain of the main lob changes with the number of elements. When height is measured in wavelengths, there is minimal differences between elevation lobs of Yagis with the same number of elements on different bands. The primary Azimuth Lob narrows as additional elements are added to the array. Copyright K7JLT
112 Yagi Azimuth Pattern From 20 to00 Feet 6 Element 00 Feet Gain ⁰ 3 db AZ BW 45⁰ FB 23 db 80 Feet 60 Feet 40 Feet 20 Feet Copyright K7JLT 2
113 Yagi General Rules of Thumb Yagi antennas have similar radiation elevation lob patterns for a single height, just the gain of the main lob changes with the number of elements. When height is measured in wavelengths, there is minimal differences between elevation lobs of Yagis with the same number of elements on different bands. The primary Azimuth Lob narrows as additional elements are added to the array. As the height of a Yagi increases the Azimuth Lob broadens. Copyright K7JLT 3
114 Yagi Gain as a Function of Boom Length 5 Element 00 Feet 48Ft Boom 5.79dBi 44Ft Boom 5.69dBi 40Ft Boom 5.2dBi 34Ft Boom 4.82dBi Copyright K7JLT 4
115 Yagi Gain We have seen that Yagi Gain increases as the boom length is increased. Is there some rule of thumb equating boom length to gain? I looked at the gain vs. boom length in wavelengths for 05 different Yagi s designed for 40 meters up to 70 centimeters and here is the result. Copyright K7JLT 5
116 Gain dbi Gain vs. Boom Length in Wavelengths Elements Elements Elements Elements Elements Elements Elements Elements Elements.00 7 Elements Elements Elements Elements Elements Elements 3.00 Dipole Boom Length in Wavelengths Copyright K7JLT 6
117 Gain dbi Gain vs. Boom Length in Wavelengths Elements Elements Elements Elements Elements Elements Elements Elements Elements.00 7 Elements Elements Elements Elements Elements Elements 3.00 Dipole Boom Length in Wavelengths Copyright K7JLT 7
118 Gain dbi Gain vs. Boom Length in Wavelengths db Boom Length in Wavelengths 6 to 2 λ 2.9 db Copyright K7JLT 8
119 Gain dbi Gain vs. Boom Length in Wavelengths db Boom Length in Wavelengths 6 to 2 λ 2.9 db 5 to 0 λ 2.9 db Copyright K7JLT 9
120 Gain dbi Gain vs. Boom Length in Wavelengths db to 2 λ 2.9 db 5 to 0 λ 2.9 db 4 to 8 λ 2.9 db Boom Length in Wavelengths Copyright K7JLT 20
121 Gain dbi Gain vs. Boom Length in Wavelengths db Boom Length in Wavelengths 6 to 2 λ 2.9 db 5 to 0 λ 2.9 db 4 to 8 λ 2.9 db 3 to 6 λ 2.9 db Copyright K7JLT 2
122 Gain dbi Gain vs. Boom Length in Wavelengths db 2 to 4 λ 2.9 db Boom Length in Wavelengths 6 to 2 λ 2.9 db 5 to 0 λ 2.9 db 4 to 8 λ 2.9 db 3 to 6 λ 2.9 db Copyright K7JLT 22
123 Gain dbi Gain vs. Boom Length in Wavelengths db Boom Length in Wavelengths 6 to 2 λ 2.9 db 5 to 0 λ 2.9 db 4 to 8 λ 2.9 db 3 to 6 λ 2.9 db 2 to 4 λ 2.9 db to 2 λ 2.9 db 2.9 db Copyright K7JLT 23
124 Yagi General Rules of Thumb (Continued) As the Yagi Boom Length increases, Antenna gain increases by 3dB for every doubling of length. Copyright K7JLT 24
125 Maximizing Yagi Gain Free Space Gain = 7.69 dbi Front-to-Back Ratio = 36.0 db Copyright K7JLT 25
126 Maximizing Yagi Gain Free Space Gain = 8.2 dbi Front-to-Back Ratio = 24.5 db Copyright K7JLT 26
127 Maximizing Yagi Gain Free Space Gain = 8.50 dbi Front-to-Back Ratio = 7.4 db Copyright K7JLT 27
128 Maximizing Yagi Gain Free Space Gain = 8.80 dbi Front-to-Back Ratio = 3.7 db Copyright K7JLT 28
129 Maximizing Yagi Gain Free Space Gain = 8.97 dbi Front-to-Back Ratio =.3 db Copyright K7JLT 29
130 Maximizing Yagi Gain Free Space Gain = 9.00 dbi Front-to-Back Ratio = 9.6 db Copyright K7JLT 30
131 Maximizing Yagi Gain Free Space Gain = 9.53 dbi up from 7.69 dbi Front-to-Back Ratio = 8.4 db down from 36 db Copyright K7JLT 3
132 Yagi General Rules of Thumb (Continued) As the Yagi Boom Length increases, Antenna gain increases by about 2.9 db for every doubling of length. Increasing Gain in an optimized Yagi will compromises other parameter such as Front-To- Back ratio. Copyright K7JLT 32
133 Can we get more gain by stacking two Yagis and what else happens? Copyright K7JLT 33
134 Here s two stacked Yagi s Copyright K7JLT 35
135 Two 5 Element 20 Meter Yagi s Antennas fed in phase with equal power At 40 Feet At 80 Feet /4 /2 Copyright K7JLT 36
136 Two 5 Element 20 Meter Yagi s Antennas fed in phase with equal power At 45 Feet At 90 Feet º /4 /2 Copyright K7JLT 37
137 Two 5 Element 20 Meter Yagi s Antennas fed in phase with equal power At 50 Feet At 00 Feet F/B decreased db Minor Lobes Decreased Gain 7.08 º /4 /2 Copyright K7JLT 38
138 Yagi General Rules of Thumb (Continued) As the Yagi Boom Length is increased Antenna gain increases. Increasing Gain in an optimized Yagi always compromises some other parameter such as Front-To-Back ratio. Adding a second identical parallel Yagi increases gain a small amount and changes the pattern. Copyright K7JLT 40
139 If we need radiation at a different angle, can we just use one of the antennas? Copyright K7JLT 4
140 Let s Look at two stacked Yagi s when only the Top antenna is active Copyright K7JLT 42
141 Two 5 Element 20 Meter Yagi s With only the top antenna fed Not Fed 50 Feet Fed 00 Feet F/B 8 db 29º º Copyright K7JLT 43 /4 /2
142 Let s Look at two stacked Yagi s when only the Bottom antenna is active Copyright K7JLT 44
143 Two 5 Element 20 Meter Yagi s With only the bottom antenna fed Fed 50 Feet Not Fed 00 Feet / º /2 Copyright K7JLT 45
144 What is happening? Mutual Coupling is effecting the antenna patterns! Copyright K7JLT 46
145 Yagi General Rules of Thumb (Continued) As the Yagi Boom Length is increased Antenna gain increases. Increasing Gain in an optimized Yagi always compromises some other parameter such as Front-To-Back ratio. Adding a second identical parallel Yagi increases gain only a small amount but changes the pattern. Mutual coupling between two parallel antennas changes the radiation pattern of each antenna. Copyright K7JLT 47
146 Two 5 Element 20 Meter Yagi s Comparison of Only Fed 00 Feet Only Fed 50 Feet Feeding both 00 & 50 Feet Good Coverage of 5º to 30º /4 /2 Copyright K7JLT 48
147 Yagi General Rules of Thumb (Continued) Coverage of a wide range of angles is possible with multiple antennas even with the occurrence of mutual coupling. Care must be taken when adding other antennas to a tower containing a Yagi (such as a 40 meter dipole which also resonates on 5 meters) because it will distort the Yagi s antenna pattern. Copyright K7JLT 49
148 End of Tutorial Copyright K7JLT 50
Antennas 101 Don t Be a 0.97 db Weakling! Ward Silver NØAX
Antennas 101 Don t Be a 0.97 db Weakling! Ward Silver NØAX Overview Antennas 101 2 Overview Basic Antennas: Ground Plane / Dipole How Gain and Nulls are Formed How Phased Arrays Work How Yagis Work (simplified)
More informationGeneral License Class Chapter 6 - Antennas. Bob KA9BHD Eric K9VIC
General License Class Chapter 6 - Antennas Bob KA9BHD Eric K9VIC Learning Objectives Teach you enough to get all the antenna questions right during the VE Session Learn a few things from you about antennas
More informationYagi-Uda (Beam) Antenna
Yagi-Uda (Beam) Antenna Gary A. Thiele KD8ZWS (Ex W8RBW) Co-author of Antenna Theory & Design John Wiley & Sons, 1981, 1998, 2013 Yagi-Uda (Beam) Antennas Outline Preliminary Remarks Part I Brief history
More information# -antenna (hash) 4 direction switchable array
# -antenna (hash) 4 direction switchable array Feasibility study Paper on CCF & OHDXF cruise 4.1.2012 Pekka Ketonen 4.2.2012 OH1TV 1 4 direction, instant switching 4.2.2012 OH1TV 2 Features Instant direction
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 informationTFD Array Modification: Dual Two Element Vertical Stacked Yagi Larry Dodd K4LED Observatory (October 29, 2017) Abstract
TFD Array Modification: Dual Two Element Vertical Stacked Yagi Larry Dodd Observatory 101science@gmail.com (October 29, 2017) Abstract Two reflector elements were added to the existing Typinski Dual TFD
More informationCHAPTER 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
More information4/29/2012. General Class Element 3 Course Presentation. Ant Antennas as. Subelement G9. 4 Exam Questions, 4 Groups
General Class Element 3 Course Presentation ti ELEMENT 3 SUB ELEMENTS General Licensing Class Subelement G9 Antennas and Feedlines 4 Exam Questions, 4 Groups G1 Commission s Rules G2 Operating Procedures
More informationResonant 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.
More informationAntenna Stacking! Antenna Stacking! Why? To Cover ALL the Angles! Scott Dickson, W5WZ
Antenna Stacking! Antenna Stacking! Why? To Cover ALL the Angles! Scott Dickson, W5WZ Using Science to Plan a Station Using Science to Plan a Station There are three elements needed to plan an HF station
More informationAugust, Antennas 101: A Course in RF Basics
August, 2012 Antennas 101: A Course in RF Basics Antenna Basics Agenda: In today s training, we will go over a brief summary of the following topics at a basic level: Electromagnetic Waves Frequency and
More informationDr. 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
More information1. 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
More informationCHAPTER 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
More informationELEC 477/677L Wireless System Design Lab Spring 2014
ELEC 477/677L Wireless System Design Lab Spring 2014 Lab #5: Yagi-Uda Antenna Design Using EZNEC Introduction There are many situations, such as in point-to-point communication, where highly directional
More informationBeams and Directional Antennas
Beams and Directional Antennas The Horizontal Dipole Our discussion in this chapter is about the more conventional horizontal dipole and the simplified theory behind dipole based designs. For clarity,
More informationHalf-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:
More informationGeneral Class License Theory III. Dick Grote K6PBF
General Class License Theory III Dick Grote K6PBF K6pbfdick@gmail.com 1 Introduction In this session we will learn about: Feed Lines Antennas Safety As in the other theory classes, we will try to present
More informationHigh Performance Wide-band self-matched Yagi Antennas - with a focus on pattern symmetry
High Performance Wide-band self-matched Yagi Antennas - with a focus on pattern symmetry by Justin Johnson, G0KSC I must say it has been good to see some long-standing Yagi developers adopt new optimisation
More informationYagi beam antennas CHAPTER 10 COMPOSITION OF A BEAM ANTENNA _
CHAPTER 10 Yagi beam antennas The Yagi beam antenna (more correctly, the Yagi Uda antenna, after both of the designers of Tohoku University in Japan 1926) is unidirectional. It can be vertically polarized
More informationBroadband Antenna. Broadband Antenna. Chapter 4
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
More informationAntenna 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
More informationDesigning and building a Yagi-Uda Antenna Array
2015; 2(2): 296-301 IJMRD 2015; 2(2): 296-301 www.allsubjectjournal.com Received: 17-12-2014 Accepted: 26-01-2015 E-ISSN: 2349-4182 P-ISSN: 2349-5979 Impact factor: 3.762 Abdullah Alshahrani School of
More informationTraveling 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
More informationAmerican International Journal of Research in Science, Technology, Engineering & Mathematics
American International Journal of Research in Science, Technology, Engineering & Mathematics Available online at http://www.iasir.net ISSN (Print): 2328-3491, ISSN (Online): 2328-3580, ISSN (CD-ROM): 2328-3629
More informationAntenna 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
More informationA short antenna optimization tutorial using MMANA-GAL
A short antenna optimization tutorial using MMANA-GAL Home MMANA Quick Start part1 part2 part3 part4 Al Couper NH7O These pages will present a short guide to antenna optimization using MMANA-GAL. This
More informationTransforms and electrical signal into a propagating electromagnetic wave OR vise versa. - Transducer goes both ways. TX and RX antennas have
Gary Rondeau AF7NX Transforms and electrical signal into a propagating electromagnetic wave OR vise versa. - Transducer goes both ways. TX and RX antennas have different jobs. For TX want to generate as
More informationANTENNAS. I will mostly be talking about transmission. Keep in mind though, whatever is said about transmission is true of reception.
Reading 37 Ron Bertrand VK2DQ http://www.radioelectronicschool.com ANTENNAS The purpose of an antenna is to receive and/or transmit electromagnetic radiation. When the antenna is not connected directly
More informationstacking broadside collinear
stacking broadside collinear There are three primary types of arrays, collinear, broadside, and endfire. Collinear is pronounced co-linear, and we may think it is spelled colinear, but the correct spelling
More informationANTENNA INTRODUCTION / BASICS
Rules of Thumb: 1. The Gain of an antenna with losses is given by: G 0A 8 Where 0 ' Efficiency A ' Physical aperture area 8 ' wavelength ANTENNA INTRODUCTION / BASICS another is:. Gain of rectangular X-Band
More informationThe New and Improved Carolina Windom Antenna and ½ Wave End Fed 20 Meter Vertical and Sloping Wire Antennas. EZNEC analysis by Pete Rimmel, N8PR
The New and Improved Carolina Windom Antenna and ½ Wave End Fed 20 Meter Vertical and Sloping Wire Antennas EZNEC analysis by Pete Rimmel, N8PR Keeps RF off the Coax below this point / (part of)/ That
More informationAntenna simulations Part 2
Antenna simulations Part 2 Pekka Ketonen OH1TV 27.1.2011 OH1TV 1 Outline Part 1 Some principles in antenna design typical steps in design process Opposite Voltage Feed 2 phased verticals on 80m 2 over
More informationChapter 5.0 Antennas Section 5.1 Theory & Principles
Chapter 5.0 Antennas Section 5.1 Theory & Principles G3C11 (B) p.135 Which of the following antenna types will be most effective for skip communications on 40-meters during the day? A. A vertical antenna
More informationNewsletter 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
More informationInstall as much wire/tubing as possible Electrically short antennas Minimize matching losses Good ground for verticals Maximizes antenna efficiency
Jim Wolf KR9U Install as much wire/tubing as possible Electrically short antennas Minimize matching losses Good ground for verticals Maximizes antenna efficiency Far-away ground conditions determine low
More informationUsing EZNEC To Compare Antennas Part 2. Bill Leonard N0CU
Using EZNEC To Compare Antennas Part 2 Bill Leonard N0CU Topics How polarization affects antenna performance How ground type affects antenna performance Example 1: 48 Shunt Fed Tower as 40M Vertical Initially,
More informationOther Arrays CHAPTER 12
CHAPTER 12 Other Arrays Chapter 11 on phased arrays only covered arrays made of vertical (omnidirectional) radiators. You can, of course, design phased arrays using elements that, by themselves, already
More information25. Antennas II. Radiation patterns. Beyond the Hertzian dipole - superposition. Directivity and antenna gain. More complicated antennas
25. Antennas II Radiation patterns Beyond the Hertzian dipole - superposition Directivity and antenna gain More complicated antennas Impedance matching Reminder: Hertzian dipole The Hertzian dipole is
More informationDESIGN OF A 10- ELEMENT YAGI-UDA U.H.F AERIAL WITH EQUAL LENGTHS OF DIRECTORS TO SUIT LOCAL TV STATIONS PROJECT INDEX: PRJ 078 By ODUOR THOMAS KIZITO
DESIGN OF A 10- ELEMENT YAGI-UDA U.H.F AERIAL WITH EQUAL LENGTHS OF DIRECTORS TO SUIT LOCAL TV STATIONS PROJECT INDEX: PRJ 078 By ODUOR THOMAS KIZITO REG NO: F17/8235/2004 Supervisor: Mr. S.L OGABA Examiner:
More informationDevelopment of a noval Switched Beam Antenna for Communications
Master Thesis Presentation Development of a noval Switched Beam Antenna for Communications By Ashraf Abuelhaija Supervised by Prof. Dr.-Ing. Klaus Solbach Institute of Microwave and RF Technology Department
More informationAntenna Technology Bootcamp. NTA Show 2017 Denver, CO
Antenna Technology Bootcamp NTA Show 2017 Denver, CO Review: How a slot antenna works The slot antenna is a TEM-Mode coaxial structure. Coupling structures inside the pylon will distort and couple to the
More informationIMPROVEMENT 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
More informationBasic Microwave Antennas - Utility-Driven Tradeoff Analysis. Tom Haddon, K5VH
Basic Microwave Antennas - Utility-Driven Tradeoff Analysis Tom Haddon, K5VH So, You Want to Get On the Microwave Bands? What Antenna? How do I Decide? Build or Buy? Cost? How Hard to Install? How Good?
More informationChapter 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)
More informationANTENNAS Wires, Verticals and Arrays
ANTENNAS Wires, Verticals and Arrays Presented by Pete Rimmel N8PR 2 1 Tonight we are going to talk about antennas. Anything that will conduct electricity can be made to radiate RF can be called an antenna.
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 informationIntermediate Course (5) Antennas and Feeders
Intermediate Course (5) Antennas and Feeders 1 System Transmitter 50 Ohms Output Standing Wave Ratio Meter Antenna Matching Unit Feeder Antenna Receiver 2 Feeders Feeder types: Coaxial, Twin Conductors
More informationANTENNA 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
More informationAntennas Demystified Antennas in Emergency Communications. Scott Honaker N7SS
Antennas Demystified Antennas in Emergency Communications Scott Honaker N7SS Importance of Antennas Antennas are more important than the radio A $5000 TV with rabbit ears will have a lousy picture Antennas
More informationContesting with Verticals & VDAs. Pete VE3IKV / VA3RA / VP2EAT
Pete VE3IKV / VA3RA / VP2EAT Verticals means both gain-type HF monoband verticals and vertical directional arrays (VDAs) Object is to keep the main vertical radiation pattern as low as possible (
More informationANTENNAS 101 An Introduction to Antennas for Ham Radio. Lee KD4RE
ANTENNAS 101 An Introduction to Antennas for Ham Radio Lee KD4RE Prepared for Presentation at the Vienna Wireless Society, 13 January 2017 So What is an Antenna Anyway? We are all familiar with wire antennas
More informationAntenna Fundamentals
HTEL 104 Antenna Fundamentals The antenna is the essential link between free space and the transmitter or receiver. As such, it plays an essential part in determining the characteristics of the complete
More informationANT6: The Half-Wave Dipole Antenna
In this lecture, we simplify the space radiating current analysis to include the special (but very important) case of the general wire antenna. Concentrating on results for the half-wave dipole, we demonstrate
More informationANTENNA BASICS FOR BEGINNERS
ANTENNA BASICS FOR BEGINNERS PART 2 -DIPOLES DIPOLES -General MULTIBAND DIPOLES RF CHOKES 1 DIPOLES Several different variations of the dipole are also used, such as the folded dipole, short dipole, cage
More informationDX University: Antennas
DX University: Antennas 29 August 31 Kai Siwiak, KE4PT Prepared for N4II s s DX-University series Sponsored by the South Florida DX Association No Antenna Theory, Just Results What does it take to work
More informationUNIT-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
More informationRECOMMENDATION ITU-R BS.80-3 * Transmitting antennas in HF broadcasting
Rec. ITU-R BS.80-3 1 RECOMMENDATION ITU-R BS.80-3 * Transmitting antennas in HF broadcasting (1951-1978-1986-1990) The ITU Radiocommunication Assembly, considering a) that a directional transmitting antenna
More informationAnalysis of Radiation Pattern of a Log Periodic Dipole Antenna in VHF Frequency
Analysis of Radiation Pattern of a Log Periodic Dipole Antenna in VHF Frequency A.B.Bhattacharya 1, K. Roy 2, A. Nag 3, K. Acharjee 3, K. Chatterjee 3, S. Banerjee 3, R. Ram 3 Department of Physics, University
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 information6 Radio and RF. 6.1 Introduction. Wavelength (m) Frequency (Hz) Unit 6: RF and Antennas 1. Radio waves. X-rays. Microwaves. Light
6 Radio and RF Ref: http://www.asecuritysite.com/wireless/wireless06 6.1 Introduction The electromagnetic (EM) spectrum contains a wide range of electromagnetic waves, from radio waves up to X-rays (as
More informationCushcraft. Amateur Radio Antennas LFA-6M5EL. 6 Meter 5 Element Loop Feed Antenna INSTRUCTION MANUAL
Cushcraft Amateur Radio Antennas LFA-6M5EL 6 Meter 5 Element Loop Feed Antenna INSTRUCTION MANUAL CAUTION: Read All Instructions Before Operating Equipment VERSION 1A Cushcraft Amateur Radio Antennas 308
More informationYAGI-UDA DESIGN OF U.H.F BAND AERIAL TO SUIT LOCAL TV STATIONS
YAGI-UDA DESIGN OF U.H.F BAND AERIAL TO SUIT LOCAL TV STATIONS PROJECT INDEX: PRJ 079 Presented By: GITAU SIMON WAWERU F17/8261/2004 Supervisor: Mr. S.L OGABA Examiner: Mr. OMBURA Objective The main objective
More informationFeed Line Currents for Neophytes.
Feed Line Currents for Neophytes. This paper discusses the sources of feed line currents and the methods used to control them. During the course of this paper two sources of feed line currents are discussed:
More informationEZNEC Antennas for Home & Field Day
EZNEC Antennas for Home & Field Day By Jack Morgan KF6T A quick tour of EZNEC Using 3D coordinates Using 3D Coordinates Add a 72 foot dipole 30 feet above ground The dipole is centered on the origin, plus
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 informationAntennas 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.
More informationDeveloping a AIS Antenna System
Developing a AIS Antenna System Autor: Heinz-H. Blikslager Case Study Investing in the future by working together for a sustainable and competitive region 1 Developing a AIS Antenna System Content 1.0
More informationHIGH GAIN KOCH FRACTAL DIPOLE YAGI-UDA ANTENNA FOR S AND X BAND APPLICATION
HIGH GAIN KOCH FRACTAL DIPOLE YAGI-UDA ANTENNA FOR S AND X BAND APPLICATION Rajeev Kumar 1, R Radhakrishnan 2 1,2 Department of Theoretical Physics, University of Madras, (India) ABSTRACT In this study,
More informationAntennas and Propagation Chapters T4, G7, G8 Antenna Fundamentals, More Antenna Types, Feed lines and Measurements, Propagation
Antennas and Propagation Chapters T4, G7, G8 Antenna Fundamentals, More Antenna Types, Feed lines and Measurements, Propagation =============================================================== Antenna Fundamentals
More informationAntenna 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
More informationA 2 ELEMENT 30 METER PARASITIC VERTICAL ARRAY PROJECT
A 2 ELEMENT 30 METER PARASITIC VERTICAL ARRAY PROJECT Having killed off the 5B-DXCC purely using LOTW, it was time for the addition of a new band. 30 meters was selected based on lack of sunspots and a
More informationANTENNA DESIGN FOR FREE USING MMANA-GAL SOFTWARE
ANTENNA DESIGN FOR FREE USING MMANA-GAL SOFTWARE 1. AVAILABLE ANTENNA DESIGN SOFTWARE EZNEC and 4nec2 are based upon the Numerical Electromagnetics Code, or NEC, which is a popular antenna modelling system
More informationComparative Analysis of Quagi and Yagi-Uda Antenna using 4NEC2 Tool
Comparative Analysis of Quagi and Yagi-Uda Antenna using 4NEC2 Tool Vinaykumar V.Angadi Student, Electronics and Communication Engineering, SKSVMACET, Lakshmeshwar. angadivinay19@gmail.com Abstract- A
More informationMultimedia Training Kit
Multimedia Training Kit Antennas and Cables Alberto Escudero Pascual, IT+46 Goals Focus on explaining the losses in the link budget equation Introduce a set of types of antennas and cables How to make
More informationDESIGN OF PASSIVE RETRANSMITTING SYSTEM
76 DESIGN OF PASSIVE RETRANSMITTING SYSTEM FOR CELLULAR COMMUNICATION Juliane Iten Chaves, Anton Gora Junior, and José Ricardo Descardeci Department of Electrical Engineering, Federal University of Parana-UFPR
More informationThe Long Wire Loop: an Omnidirectional, Multiband, Low Angle Radiator. By Steve Cerwin, WA5FRF
The Long Wire Loop: an Omnidirectional, Multiband, Low Angle Radiator By Steve Cerwin, WA5FRF Introduction: Something Old and Something New As the name implies, long wire loop is a marriage of the venerable
More informationRadiation Patterns of Three Element SteppIR Antennas: Measurements and Computer Models.
Radiation Patterns of Three Element SteppIR Antennas: Measurements and Computer Models. Georg Efremidis, DJ3AA, Helmut Hengstenberg, DL9CI, und Rolf Schick, DL3AO Introduction. Horizontal radiation patterns
More informationJK-65 Five Element 6M Yagi
JK-65 Five Element 6M Yagi PO Box 266, Croton Falls, NY 10519-0266 845.228.8700 (TEL) 845.279.5526 (FAX) info@jkantennas.com Page 1 of 8 JK Antennas Limited Warranty and Liability JK Antennas ( Manufacturer
More information4 Antennas as an essential part of any radio station
4 Antennas as an essential part of any radio station 4.1 Choosing an antenna Communicators quickly learn two antenna truths: Any antenna is better than no antenna. Time, effort and money invested in the
More informationS.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 :
More informationPhysical Yagi-Uda Antenna
Physical Yagi-Uda Antenna Tanner Gore, Keenan Rusk, Bijan Tehrani I. INTRODUCTION Our group objective was to design, analyze, and fabricate a directional antenna. This task had five major objectives. Resonate
More informationDO NOT COPY. Basic HF Antennas. Bill Shanney, W6QR
Basic HF Antennas Bill Shanney, W6QR When I was first licensed in 1961 I didn t know much about antennas. I put up the longest wire that fit on my parent s lot at the lofty height of 25 and fed it with
More information9el 144MHZ LFA YAGI ASSEMBLY & INSTALLATION MANUAL
1 9el 144MHZ LFA YAGI ASSEMBLY & INSTALLATION MANUAL 2 WARNING EXTREME CAUTION SHOULD BE TAKEN WHEN CONSTRUCTING AND ERECTING ANTENNA SYSTEMS NEAR POWER AND TELEPHONE LINES. SERIOUS INJURY OR DEATH CAN
More informationIntroduction to Radar Systems. Radar Antennas. MIT Lincoln Laboratory. Radar Antennas - 1 PRH 6/18/02
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
More informationThe Vertical Buddi Beam on 20m using no Coils.
The Vertical Buddi Beam on 20m using no Coils. design by Lou Rummel KE4UYP In this article I am going to describe a totally new way to construct and use a very old design the two element Yagi antenna.
More informationComing next: Wireless antennas for beginners
Coming next: Wireless antennas for beginners In other rooms: Logbook of the World (Sussex Suite) SO2R contest operation (Stable Suite) Wires for your wireless: Simple wire antennas for beginners dominic
More information13256 W. 98 th Street, Lenexa, KS 66215, (800) Antenna Tutorial
Antenna Tutorial AeroComm is engaged in the research, development and manufacture of highperformance, low-cost, 2.4GHz radios. A significant portion of AeroComm customers are Original Equipment Manufacturers
More informationBasic Wire Antennas. Part II: Loops and Verticals
Basic Wire Antennas Part II: Loops and Verticals A loop antenna is composed of a single loop of wire, greater than a half wavelength long. The loop does not have to be any particular shape. RF power can
More informationLesson 11: Antennas. Copyright Winters Version 1.0. Preparation for Amateur Radio Technician Class Exam
Lesson 11: Antennas Preparation for Amateur Radio Technician Class Exam Topics Antenna ½ wave Dipole antenna ¼ wave Vertical antenna Antenna polarization Antenna location Beam antennas Test Equipment Exam
More informationModule contents. Antenna systems. RF propagation. RF prop. 1
Module contents Antenna systems RF propagation RF prop. 1 Basic antenna operation Dipole Antennas are specific to Frequency based on dimensions of elements 1/4 λ Dipole (Wire 1/4 of a Wavelength) creates
More informationA Fox- Hunting DF Twin Tenna
A Fox- Hunting DF Twin Tenna Interferometers give sharp bearings, but they lack sensitivity for distant work. Yagis are sensitive, but they provide relatively broad bearings. Build an antenna that blends
More informationThe Fabulous Dipole. Ham Radio s Most Versatile Antenna
The Fabulous Dipole Ham Radio s Most Versatile Antenna 1 What is a Dipole? Gets its name from its two halves One leg on each side of center Each leg is the same length It s a balanced antenna The voltages
More informationLoop 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
More informationWelcome to AntennaSelect Volume 34 October UHF and VHF Stacked Antenna Pylons
Welcome to AntennaSelect Volume 34 October 2017 Welcome to Volume 34 of our newsletter, AntennaSelect TM. Every two months we will be giving you an under the radome look at antenna and RF Technology. If
More informationDESIGN AND PERFORMANCE EVALUATION OF TWO-UNIT YAGI-UDA ARRAY FOR UHF SATELLITE COMMUNICATION
DESIGN AND PERFORMANCE EVALUATION OF TWO-UNIT YAGI-UDA ARRAY FOR UHF SATELLITE COMMUNICATION Rupesh Lad 1, Pritesh Chhajed 2, Lokeshsingh Bais 3, Shyam Dahiwal 4, Sukhada Saoji 5, Vaibhav Rekhate 6, Pushkar
More informationHigh Performance System-on-Package Integrated Yagi-Uda Antennas for W-band Applications and mm-wave Ultra-Wideband Data Links
High Performance System-on-Package Integrated Yagi-Uda Antennas for W-band Applications and mm-wave Ultra-Wideband Data Links B. Pan, G. DeJean, J. Papapolymerou, M. M Tentzeris, Y. Yoon and M. G. Allen
More informationHigh Performance System-on-Package Integrated Yagi-Uda Antennas for W-band Applications and mm-wave Ultra-Wideband Data Links
High Performance System-on-Package Integrated Yagi-Uda Antennas for W-band Applications and mm-wave Ultra-Wideband Data Links B. Pan, G. DeJean, J. Papapolymerou, M. M Tentzeris, Y. Yoon and M. G. Allen
More informationInexpensive Lightweight High-Performance Small Yagi Antennas for VHF-UHF Portable Operation
Inexpensive Lightweight High-Performance Small Yagi Antennas for VHF-UHF Portable Operation Rick Campbell KK7B Pacific Northwest VHF Conference Bend, Oregon October 8 2016 But why? We already have: Inexpensive
More informationPAPER PRESENTATION ON ANTENNA AND WAVE PROPAGATION COMPARISON OF FRACTAL ANTENNA AND YAGI-UDA ANTENNA
ISSN 2320-9119 74 International Journal of Advance Research, IJOAR.org Volume 1, Issue 3, March 2013, Online: ISSN 2320-9199 PAPER PRESENTATION ON ANTENNA AND WAVE PROPAGATION COMPARISON OF FRACTAL ANTENNA
More information