Practical_Antenna_Handbook_0071639586

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I n d e x 749 dipole (Cont.): sloping (or “sloper”; see sloping dipole) spreaders, 197 stub tuning, 181 third harmonic, using on, 204 three-Âdimensional (ideal) radiation pattern of, 182–183 three-Âwire dipole, 196 traveling waves, 96–97, 98–102 directional (beam) antennas, 67 directional discontinuity ring radiator (DDRR) antenna, 503–505 directivity, 97, 182, 474–478 vs. gain, 182 directivity gain (G d ), 477–478 director (parasitic element), 162, 280 directrix (of parabola), 481–482 dish antennas (See parabolic “dish” antennas) dispersion, 23–24, 115 displacement current, 90–91, 242 distance to radio horizon, 34–36 diurnal variations in ionosphere, 52–53, 56 diversity propagation/reception, 67–68, 331–332 DK7ZB, 309 Doppler antenna, 524–525 double ducky direction finder (DDDF), 528–529 double extended Zepp (See extended double Zepp) double-Âshielded coaxial cable, 113 doublet, 175–176 double vee beam longwire antennas, 260–262 (See also longwire) driven element, 162, 280 drooping radials (See Âground-Âplane antennas) ducting, 39–40, 42 dummy load, 619–621 E EA3VY, 360 effective aperture (A e ), 17, 471 effective Earth’s radius factor (K factor), 23–27 effective height of loop antenna, 348 effective radiated power (ERP), 55, 278, 477 efficiency, 182, 198, 217, 248, 332–333, 376–379, 390–393, 406, 473, 477, 683, 692–698 E–field units, 16 E layer of ionosphere, 45, 52–53 sporadic E (E S ) skip, 57 electrical vs. physical length, 139, 143, 146–147 electric charge (See charge) electric field(s), 14, 16, 87–88, 229 far-Âfield equation, 94 graphical representation, 88–89 power density, 16–17 in waveguides, 451–453 electromagnetic fields, 87–92 electromagnetic interference (EMI), 337, 361, 366 electromagnetic radiation, 717 electromagnetic waves, 9, 13–17 energy carried by, 93 prediction by Maxwell, 9, 93 electrostatic charge buildup in longwires, 256 eleven-Âyear cycle, ionospheric propagation, 56 emergency antennas, 389–398 bow and arrow, 396 grounding and ground systems, 391–393 polarization, 394–395, 398 preparation, 389–390, 398 temporary supports, 391, 394–398 vertical monopoles, 390–394, 398 wire antennas, 394–395, 398 end effect, 105–106 end-Âfed longwire (See longwire) end-Âfed Zepp antenna, 222–224 end-Âfire array, 152–153, 154–155, 215 equinoxes, 72 erecting antennas safely, 625–628 ether (See æther) Everett, W. L., 226 EWE antenna, 358–359 exponentials, 722–723 extended double Zepp (EDZ), 157, 203 EZNEC, 546, 549–554, 556, 557 F fading, 57–59, 67–68 diversity reception, 67–68, 331–332 ionospheric, 67–68 selective fading, 67 Fahrenheit (temperature) 492 fall-Âarrest harness, 675 fan dipole, 197 multiband, 204 farad (F; unit of capacitance), 83 Faraday shield, 357–358
750 I n d e x far-Âfield expressions, 94 Federal Aviation Agency (FAA), 700 Federal Communications Commission (FCC), 4, 511, 700 feed geometries (“dish”), 483–485 feed illumination (“dish”), 482 feedpoint, 92, 107 ATU at, 533–534 fence post support, 647, 649–650 ferrite core inductors, 90 phasing transformer, 269–271 ferrite rods, 511, 515 ferromagnetic materials, 90 Fessenden, Reginald, 3 fiber optics, 448 fields, 14, 87–93, 280–281 graphical representation, 88 induced, 280–281 linked electric and magnetic, 14, 88, 92–93 quasi-Âstatic, 14 reradiated, 280–281 static, 14 field strength, 16 field strength meters, 380, 383, 600–602 first derivative, 716 5 ⁄8-wavelength Âground-Âplane vertical, 157, 429–430 flag antenna, 359–360 flagpole antenna, 366–368 flatplate array, 488–489 flattop antenna, 419–423 (See also ÂT-Âantenna) F layer(s) of ionosphere, 52, 53 flux, magnetic density (B), 90 FM broadcast band, 654 FM marine radio antennas, 383 folded dipole, 111, 194–196, 636–638 fold- or Âtilt-Âover, 655, 664–665 advantages vs. disadvantages, 665 guying, 665 forward current (See incident current) forward power (P FWD ), 134 forward scatter, 75 forward voltage (See incident voltage) Fourier analysis, 121 “fox hunting,” 518, 529 Franklin, Benjamin, 82 free space, 12, 14, 27, 30, 104–105, 118 impedance, 95 frequency, 11, 712, 714, 715 cycles per second (cps), 11, 715 hertz (Hz), 11, 715 units, 11–12 frequency dispersion (See dispersion) frequency diversity, 42 frequency modulation (See FM broadcast band; FM marine radio antennas) frequency of optimum traffic (FOT), 55 Fresnel zones, 24–26 G G2BI, 226 G5RV multiband dipole antenna, 224 gain, 710–711 directivity gain (G d ), 477–478 galactic noise, 49 galvanic action, 244 gamma-Âmatch feed system, 244–246, 504 gamma rod, 245 for Âshunt-Âfed towers, 408–412 for Yagi antennas, 285, 296, 302–304 gamma rays, 48 gas-Âfilled line, 112–113 Geiser, David T., W5IXM, 528 gigahertz (GHz), 11–12 gin pole, 675–676 Global Positioning System (GPS), 511, 515 GM1IAA, 226 Godley, Paul (deceased), ex-1ZE, 333 graphite-Âsand dummy load, 463–464 gray line propagation, 72–73 great circle paths, 64–67 Green Heron (rotator controller), 308 grid dip meter (or oscillator; see dip meter) ground(s): array effect, 163–171 “average” ground, 167 effective depth, 167 effect of slope, 167 ideal, 163 losses, 163, 167 perfectly conducting, 163–164 grounded vertical antennas (See vertically polarized antennas) grounding and ground systems, 683Â–698 antenna efficiency, 683, 692–698 elevated grounds, 696–698 radials, 694–698 salting the soil, 693
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Practical Antenna Handbook
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Practical Antenna Handbook Joseph J
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Contents Preface . . . . . . . . .
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C o n t e n t s vii 12 The Yagi-Uda
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C o n t e n t s ix Switched-Pattern
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Preface My paternal grandfather was
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P r e f a c e xiii this book repres
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Acknowledgments As with other field
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Background and History Part I Chapt
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CHAPTER 1 Introduction to Radio Com
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C h a p t e r 1 : I n t r o d u c t
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Fundamentals Part II Chapter 2 Radi
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CHAPTER 2 Radio-Wave Propagation To
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C h a p t e r 2 : r a d i o - W a v
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Figure 2.29C Monthly averaged sunsp
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CHAPTER 3 Antenna Basics An antenna
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C h a p t e r 3 : A n t e n n a B a
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CHAPTER 4 Transmission Lines and Im
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C h a p t e r 4 : T r a n s m i s s
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Chapter 5 Antenna Arrays and Array
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C h a p t e r 5 : a n t e n n a A r
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A. B. C. D. E. F. G. H. Figure 5.9
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B. C. D. E. F. G. H. Figure 5.10 Gr
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High-Frequency Building-Block Anten
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CHAPTER 6 Dipoles and Doublets A co
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C h a p t e r 6 : D i p o l e s a n
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CHAPTER 7 Large Wire Loop Antennas
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C h a p t e r 7 : L a r g e W i r e
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CHAPTER 8 Multiband and Tunable Wir
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C h a p t e r 8 : M u l t i b a n d
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CHAPTER 9 Vertically Polarized Ante
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C h a p t e r 9 : V e r t i c a l l
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Quarter-wave vertical radiator Insu
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Directional High-Frequency Antenna
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CHAPTER 10 Wire Arrays When a singl
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C h a p t e r 1 0 : W i r e A r r a
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Wire 2 C h a p t e r 1 0 : W i r e
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CHAPTER 11 Vertical Arrays Despite
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C h a p t e r 1 1 : V e r t i c a l
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CHAPTER 12 The Yagi-Uda Beam Antenn
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C h a p t e r 1 2 : T h e Y a g i -
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CHAPTER 13 Cubical Quads and Delta
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C h a p t e r 1 3 : C u b i c a l Q
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Figure 13.5 Multiband quad “spide
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High-Frequency Antennas for Special
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CHAPTER 14 Receiving Antennas for H
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C h a p t e r 1 4 : r e c e i v i n
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351 Figure 14.12 Remote tuning sche
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CHAPTER 15 Hidden and Limited-Space
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C h a p t e r 1 5 : H i d d e n a n
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CHAPTER 16 Mobile and Marine Antenn
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C h a p t e r 1 6 : M o b i l e a n
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CHAPTER 17 Emergency and Portable A
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C h a p t e r 1 7 : E m e r g e n c
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Antennas for Other Frequencies Part
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CHAPTER 18 Antennas for 160 Meters
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C h a p t e r 1 8 : a n t e n n a s
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CHAPTER 19 VHF and UHF Antennas The
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C h a p t e r 1 9 : V H F a n d U H
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CHAPTER 20 Microwave Waveguides and
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C h a p t e r 2 0 : M i c r o w a v
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λ o = c / f 8 3× 10 m / s = 9 C h
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CHAPTER 21 Antenna Noise Temperatur
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C h a p t e r 2 1 : A n t e n n a N
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C h a p t e r 2 1 : A n t e n n a N
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CHAPTER 22 Radio Astronomy Antennas
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C h a p t e r 2 2 : R a d i o A s t
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Figure 22.9 Interferometer pattern.
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CHAPTER 23 Radio Direction-Finding
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C h a p t e r 2 3 : R a d i o D i r
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Figure 23.9 Adcock array RDF antenn
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Figure 23.11 Watson-Watt Adcock arr
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Tuning, Troubleshooting, and Design
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CHAPTER 24 Antenna Tuners (ATUs) Th
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C h a p t e r 2 4 : a n t e n n a T
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CHAPTER 25 Antenna Modeling Softwar
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C h a p t e r 2 5 : A n t e n n a M
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Figure 25.3B Bent dipole wire and s
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CHAPTER 26 The Smith Chart The math
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Figure 26.2 Normalized impedance li
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A Figure 26.3 Constant resistance c
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A Figure 26.4A Constant inductive r
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C h a p t e r 2 6 : T h e S m i t h
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D C B A Figure 26.5 Radially scaled
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0.165 Y ' 1.0 j1.1 G' 1.0 Y ' 0.2
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CHAPTER 27 Testing and Troubleshoot
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C h a p t e r 2 7 : T e s t i n g a
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Mechanical Construction and Install
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CHAPTER 28 Supports for Wires and V
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C h a p t e r 2 8 : S u p p o r t s
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CHAPTER 29 Towers At some point, th
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C h a p t e r 2 9 : T o w e r s 655
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C h a p t e r 2 9 : T o w e r s 677
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C h a p t e r 2 9 : T o w e r s 681
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CHAPTER 30 Grounding for Safety and
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C h a p t e r 3 0 : G r o u n d i n
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Page 726 and 727: Appendices
Page 728 and 729: APPENDIX A Useful Math The material
Page 730 and 731: A p p e n d i x A : U s e f u l M a
Page 748 and 749: Appendix B Suppliers and Other Reso
Page 750 and 751: A p p e n d i x B : S u p p l i e r
Page 760 and 761: B.1.6 Rotators and Controllers Alfa
Page 766 and 767: Index Note: Boldface numbers denote
Page 768 and 769: I n d e x 747 Binns, Jack, first ma
Page 772 and 773: I n d e x 751 grounding and ground
Page 774 and 775: I n d e x 753 ionospheric propagati
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Page 778 and 779: I n d e x 757 noise (Cont.): sky no
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Page 784 and 785: I n d e x 763 transmission lines, 1
Page 786 and 787: I n d e x 765 vertically polarized
Page 788: I n d e x 767 Yagi antennas (Cont.)
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