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E-raamat: Monopole Antennas [Taylor & Francis e-raamat]

(The MITRE Corporation (retired), Bedford, Massachusetts, USA)
  • Formaat: 768 pages
  • Ilmumisaeg: 22-Apr-2003
  • Kirjastus: CRC Press Inc
  • ISBN-13: 9780429223297
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Monopole AntennasSuurem pilt
  • Formaat: 768 pages
  • Ilmumisaeg: 22-Apr-2003
  • Kirjastus: CRC Press Inc
  • ISBN-13: 9780429223297
Teised raamatud teemal:
Taylor & Francis e-raamatudRohkem infot Taylor & Francis e-raamatute kohta
Raamatu kodulehekülg: https://www.taylorfrancis.com/books/9780429223297
Describes the modeling, testing, and application of both airborne and ground-based monopole antennas. Retired from the MITRE corporation, the author presents models in which the current distribution of the monopole element is known and not known, then examines the influence on the monopole antenna currents and mode of propagation by the antenna's proximity to the earth. A large appendix lists computer plots and printouts of numerical results. The CD-ROM contains 15 computer programs for performing computations. The first five chapters are a revised version of Monopole elements of circular ground planes published in 1987 by Artech House. Annotation (c) Book News, Inc., Portland, OR (booknews.com)
Preface v
Acknowledgments ix
Part I Monopole Elements on Disk Ground Planes in Free Space
Introduction
2(4)
Circuit Representation
6(9)
Geometry and Coordinate Systems
6(1)
Directivity and Input Impedance
7(2)
Relationship Between Radiation Resistance and Directivity on the Horizon
9(1)
Characterization of Currents
10(5)
Models in Which the Current Distribution on the Monopole Element is Initially Known
15(52)
Boundary Conditions
15(2)
Induced EMF Method, Ground Plane of Zero Extent
17(12)
Concept of a Ground Plane of Zero Extent
17(2)
Near-Fields
19(2)
Far-Fields
21(3)
Input Impedance
24(5)
Summary of Results
29(1)
Integral Equation: 0 ≤ ka ≤ 2.75
29(9)
Method of Moments: 0 ≤ ka ≤ 14
38(2)
Oblate Spheroidal Wave Functions: 3.0 ≤ ka ≤ 6.5
40(5)
Form of Solution
41(1)
Corrections
41(1)
Regions of Calculation Validity
42(2)
Accuracy
44(1)
Numerical Results
44(1)
Scalar Diffraction Theory and Geometric Theory of Diffraction: 6.5 < ka < ∞
45(2)
Variational Method: 30 ≤ ka < ∞
47(2)
Method of Images: ka = ∞
49(7)
Near-Fields
51(1)
Far-Fields
52(2)
Input Impedance
54(2)
Summary of Results
56(11)
Models in Which the Current Distributions on the Monopole Element and Ground Plane Are Both Initially Unknown
67(16)
Boundary Conditions
67(1)
Method of Moments: 0 < ka ≤ 14
68(7)
Method of Moments Combined with Geometric Theory of Diffraction: 8.5 ≤ ka < ∞
75(5)
Method of Images: ka = ∞
80(2)
Summary of Results
82(1)
Comparison with Experimental Results
83(13)
Applications Utilizing Electrically Small Elements
96(78)
Electrically Small vs. Quarter-Wave and Resonant Elements
96(1)
Fundamental Limitations of Digitally-Tuned, Electrically Small Elements
97(15)
Introduction
97(5)
Definition of Problem
102(1)
Radiation Regions
103(1)
TMn0 Spherical-Wave Modes
103(2)
Equivalent Circuit of TM10 Mode
105(1)
Q10 of TM10 Mode
106(1)
Effect of Ground-Plane Size on Q10
106(2)
Bounds on Antenna System Performance
108(2)
Unloaded Q of Monopole Elements
110(2)
Tuning Stability of a Digitally-Tuned, Electrically Small Element on Disk Ground Planes of Different Radii
112(18)
Introduction
112(1)
Analytical Model
113(10)
Numerical Results
123(4)
Conclusions
127(3)
Noise Factor of Receiving Systems with Arbitrary Antenna Impedance Mismatch
130(12)
Introduction
130(1)
Analytical Model
131(7)
Numerical Results
138(3)
Conclusions
141(1)
Use of the Longley--Rice and Johnson--Gierhart Tropospheric Radio Propagation Programs: 0.02--20 GHz
142(20)
Introduction
142(3)
Basic Transmission Loss
145(12)
Input Parameter Specification for the Longley--Rice Version 1.2.2 Prediction Program
157(4)
Input Parameter Specification for Johnson--Gierhart IF-77 Prediction Program
161(1)
Design and Qualification of a VHF Antenna Range
162(12)
Requirements
162(2)
Design Considerations
164(2)
Qualification
166(8)
Part II Monopole Elements on Disk, Radial-Wire, and Mesh Ground Planes in Proximity to Flat Earth
Influence of Proximity to Earth
174(18)
Characterization of Antenna Parameters
Circuit Parameters
178(4)
Earth Characteristics
182(8)
Antenna Structure Fabrication Considerations
190(2)
Models in the Absence of a Ground Plane
192(67)
Introduction
192(1)
Space-Wave Fields: Method of Images with Fresnel Reflection
193(25)
Vertically Polarized Hertzian Dipole in Air Above Conducting Earth
193(11)
Vertically Polarized Hertzian Dipole in Air Above Nonconducting Earth
204(10)
Thin Monopole Element in Air Above Conducting Earth
214(4)
Surface-Wave Fields: Sommerfeld-King Integrals for Vertically Polarized Hertzian Dipole in Air Above Flat Earth
218(41)
Hertz Potential in Air and Earth
218(7)
Fields and Pseudo-Fields in Air
225(1)
Cases |n2| >> 1 and |n2| ~ 1
226(33)
Disk Ground Planes
259(21)
Introduction
259(1)
Method of Moments: 0 ≤ ka ≤ 14
260(18)
Current Distribution and Input Impedance
260(1)
Far-Zone Field
261(6)
Validation
267(8)
Numerical Results
275(3)
Variational Method: 2 ≤ ka ≤ ∞
278(1)
Method of Images: ka = ∞
278(2)
Radial-Wire Ground Planes
280(15)
Method of Moments: 0 ≤ ka ≤ 250
280(11)
Model Description
280(3)
Validation
283(3)
Radiation Pattern Degradation by Feed Cable
286(2)
Numerical Results
288(3)
Variational Method: ka ≥ 6; N ≥ 100
291(4)
Wire-Mesh Ground Planes
295(14)
Modeling Limitations
295(3)
Method of Moments
298(3)
Bonded Radial--Concentric Mesh
298(1)
Rectangular Mesh
299(2)
Space-Wave Far-Fields: Method of Images with Fresnel Reflection, ka = ∞
301(8)
Fresnel Reflection Coefficient
301(2)
Parallel-Wire Grid
303(6)
System Performance
309(366)
Noise Factor and Antenna Gains in the Signal/Noise Equation for Over-the-Horizon Radar
309(9)
Introduction and Summary
309(1)
Recommended Form of the Signal-to-Noise Radar Equation
310(8)
Influence of Nonhomogeneous Earth on the Performance of High-Frequency Receiving Arrays with Electrically Small Ground Planes
318(22)
Introduction
318(1)
Model
319(7)
Numerical Results
326(8)
Summary and Conclusions
334(6)
Performance of Ground-Based High-Frequency Receiving Arrays with Electrically Small Ground Planes
340(11)
Introduction
340(1)
Element Directivity
341(1)
System Operating Noise Factor
342(6)
Array Factor Degradation by Nonhomogeneous Earth
348(1)
Summary and Conclusions
348(3)
Appendix A Computer Plots and Printouts of Numerical Results
A.1 Integral Equation
351(50)
A.2 Method of Moments---Free Space
401(67)
A.3 Oblate Spheroidal Wave Functions
468(5)
A.4 Variational Method
473(5)
A.5 Method of Moments Combined with Geometrical Theory of Diffraction
478(3)
A.6 Method of Moments (Richmond)---Proximity to Earth
481(81)
A.7 Method of Moments (NEC-GS)
562(39)
A.8 Method of Images with Fresnel Reflection
601(61)
Appendix B Computer Programs
B.01 Bardeen (Integral Equation)
662(1)
B.02 Richmondi, Richmond2 (Method of Moments---Free Space)
663(1)
B.03 Leitner-Spence (Oblate Spheroidal Wave Functions)
664(1)
B.04 Storer (Variational Method---Free Space)
665(1)
B.05 Awadalla (Method of Moments with Geometrical Theory of Diffraction)
665(1)
B.06 Richmond5, Richmond6 (Method of Images with Moments---Free Space)
666(1)
B.07 Longley--Rice (Tropospheric Propagation---Program ITM)
667(2)
B.08 Johnson--Gierhart (Tropospheric Propagation---Program IF-77)
669(1)
B.09 Richmond3, Richmond4 (Method of Moments---Proximity to Earth)
670(1)
B.10 Richmond7 (Variational Method---Proximity to Earth)
671(1)
B.11 Modified Images (Method of Images with Fresnel Reflection)
672(1)
B.12 Ioncap (HF Ionospheric Propagation---Program HFWIN32)
673(2)
Appendix C Evaluation of Sommerfeld--King Integrals for Surface--Wave Fields
675(35)
C.1 Exact Integral Expressions for Pseudo-Surface Wave Fields
675(5)
C.2 |n2| >> 1, Approximate Closed-Form Expressions for Fields
680(18)
C.3 |n2| ~ 1, Approximate Closed-Form Expressions for Fields
698(12)
Appendix D Beam Pointing Errors Caused by a Nonhomogeneous Earth
710(5)
References 715(12)
Index 727


Melvin M. Weiner is a retired Member of the Technical Staff, The MITRE Corporation, Bedford, Massachusetts. The author of numerous professional publications, he holds five patents and is a member of the Institute of Electrical and Electronics Engineers, the American Physical Society and the Optical Society of America. He received the B.S. (1956) and M.S. (1956) degrees in electrical engineering from The Massachusetts Institute of Technology, Cambridge.
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