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Antenna LAB NOTES
Scientific Investigations of How Various Antennas Work
Or Maybe Don't Work as Well as Claimed!

f.jpg (1114 bytes)rom his personal Laboratory and machine shop, author Joel C. Hungerford does in-depth investigations of how antennas and their related devices work and how their performance might be enhanced through a better understanding—all aimed at helping our readers with their understanding and ability to improve the performance of their own respective rigs.

In this 60-chapter book, containing 410 pages with 100s of illustrations, Joel performs experiments on numerous kinds of antennas and the various devices utilized to enhance their respective performance—traditional as well as some of those "magic" antennas and devices. Not only does the author investigate those existing classes of antennas, but departs from those designs and creates experimental designs of his own in the process, using materials never tried before. How these new designs (and the existing designs) were created, tested and their resulting performances are all described in this special book published only by antenneX.

In the process, Joel explores everything in between the antenna and the tuner to check for the best way to make those connections and how to possibly minimize any losses along the route between the antenna and the tuner. He reviews and diagrams various circuits and how they may be improved. A separate section on coils is included.

While Joel makes use of some math to support applied theories, the math is used sparingly and only when necessary, especially when it comes to an investigation of things like the Poynting Vector Synthesis recently used by some antenna designers. Calculator spreadsheets are made available to help simplify your own custom calculations in some of the projects covered.

Some of the simple equipment used by Joel in his Lab is described in detail and tips on their use.


ABOUT THE AUTHOR
author.jpg (8836 bytes)Joel C. Hungerford, KB1EGI
1958, Bachelor of Science Degree at Massachusetts Institute of Technology
1962 Masters in Science at Purdue University

Worked for 16 years designing electronic countermeasures against monopulse and pulse compression radars, including remote means of bending the radar's antenna pattern, and have designed and built an instrumentation radar.

Worked for about 15 years as an electronic consultant designing and troubleshooting microwave anechoic chambers using chamber simulation computer programs I wrote for the purpose. Designed and built (I have a machine shop) test fixtures to measure the electronic properties of materials and absorbers. Have written computer programs to do stock market analysis and to encrypt documents using simulated rotor machine coders.

Was first licensed as W9TPH in 1952, then K1ZLJ but let it lapse in the 1960's. Later, retested and passed General Class and then Extra Class a few months afterwards. After relocating from the East Coast to the West Coast in Oregon, USA, now, having put the ocean on the left instead of the right. Am interested in compact antennas to fit in my postage stamp of land looking out over the Pacific Ocean.

An active member of the GARDS since 1999, involved in research of smaller devices with this International Research & Development group.

CONTENTS
This is a very special book and it can fill another very large void in your library! Take a look at the large list of contents below to see just how large a void it fills for you.
Chapter

Title

PART 1

Some Useful Instruments

1

Using and Improving an SWR Bridge 9

2

An SWR Bridge with Automatic Level Control 14

3

An SWR Bridge with Automatic Level Control - Part 2 20

4

The Panadapter 28

PART 2

Feeding and Loading
5 Cable Velocity and Frequency 38
6 A Tale of Twin Lead 44
7 Mutual Coupling Effects in Loaded Dipoles 47
8 Loading the Dipole Center 54
9 Inductance-Loaded Dipole Antennas 63
10 DSA or Dipole Simulation Antenna 72
11 Multiband Antennas with End-Mtd Loading Sections 80
12 Broadening the BW of the Multi-Band Dipole 88
13 More Data on the Tri-Band Dipole 94
14 The Saggy Maggy - A MagneTITE Antenna 100
15 Another MagneTITE Antenna 108
16 Top-Loaded MagneTITE Antenna 115

PART 3

The Gieskieng Antenna Concept

17

Two Experiments - The MicroVert & The Gieskieng 123

18

Understanding the Gieskieng 127

19

Understanding the Gieskieng - Part 2 136
20 The Gieskieng Antenna A/B Tests 142
21 Updating the Gieskieng Transmission Line 147
22 Updating the Gieskieng Transmission Line II 152
23 Two Gieskiengs Combined 157

PART 4

The CCD or Controlled Current Distribution

24

The CCD Experiments 163

25

Building a CCD Antenna 169

26

More Experiments with a CCD 176

PART 5

The Hairpin Monopole

27

The Magnetic Hairpin Monopole

187

28

Hairpin Monopole Experiments 193

29

The Magnetic Hairpin Monopole for 20/40 Meters 199

PART 6

Looking at Magnetic Loops

30

Loops & Their Surface Areas

205

31

Loop Surface Area Revisited

214

32

Rotating Connected Loops 221
33 The Litz Loop 228
34 Twisted Loop as an Emergency or Field Day Antenna 237
35 Hardening the 20-Meter Loop

245

36 The Jef Drive Explored 251
37 Exploring Loop Sizes 254

PART 7

The MicroLOOP

38

Homebrew Phase Detector and the MicroLOOP

259

39

Investigating the MicroLOOP 264

40

The MicroLOOP - Part 2 270
PART 8 The Tesla Coil and the Dipole
41 The Tesla-Coil Dipole: A Spice Analysis 277

42

The Very-High C/L Tuned-Circuit Tesla Dipole

285

43 Improving Measurements on the Tesla Coil Dipole 290
PART 9 Investigating the CFA
44 Calculating Dimensions 297
45 Unplanned Resonance in CFA Tests 302
46 CFA: Tuning for Radiation 310
47 The 3-Wire CFA 320
48 Finding Resonance: The J-Pole & CFA 325
49 CFA Feed Lead Length 330
50 CFA: Matching is NOT Radiation 335
51 CFA: Looking for Poynting Synthesis 341
52 CFA: Top Hat Effects 349
53 CFA: Frequency Vs Size 355
PART 10 Dissecting the Capacitive Antenna
54 These Capacitor Antennas 360
55 Unwinding Coils in Capacitive Antennas 365
56 Unwinding Coils in Capacitive Antennas: Part 2 371
57 Coils & Wire Lengths: Getting More Precise 376
58 Changing the Coil Position & Size Along the Antenna Wire 385
59 The Size of the Loading Coil 394
PART 11 An Epilogue by LB Cebik, W4RNL
60 What is Antenna Experimenting? 406
 

HOW TO ORDER
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