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Antennas in Inhomogeneous Media
International Series of Monographs in Electromagnetic Waves
- 1st Edition - October 22, 2013
- Author: Janis Galejs
- Editors: A. L. Cullen, V. A. Fock, J. R. Wait
- Language: English
- Paperback ISBN:9 7 8 - 1 - 4 8 3 1 - 7 0 5 6 - 5
- eBook ISBN:9 7 8 - 1 - 4 8 3 1 - 8 6 3 7 - 5
Antennas in Inhomogeneous Media details the methods of analyzing antennas in such inhomogeneous media. The title covers the complex geometrical configurations along with its… Read more
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Request a sales quoteAntennas in Inhomogeneous Media details the methods of analyzing antennas in such inhomogeneous media. The title covers the complex geometrical configurations along with its variational formulations. The coverage of the text includes various conditions the antennas are subjected to, such as antennas in the interface between two media; antennas in compressible isotropic plasma; and linear antennas in a magnetoionic medium. The selection also covers insulated loops in lossy media; slot antennas with a stratified dielectric or isotropic plasma layers; and cavity-backed slot antennas. The book will be of great use to electrical, communications, and radio engineers.
List of Tables
Acknowledgments
List of Principal Symbols
1. Introduction
1.1 Scope and Limitations of the Treatment
1.2 Field Equations
1.3 Hertz Potential
1.4 TE and TM Modes
1.5 Definitions of Antenna Impedance or Admittance
1.6 References
2. Thin Wire Antennas in Free Space
2.1 EMF Method
2.2 Hallen's Method
2.3 Storer's Variational Solution
2.4 Thin Wire Loop Antenna
2.5 Appendix: Hertz Vector of a Cylindrical Wire
2.6 Exercises
2.7 References
3. Slot Antennas in Free Space
3.1 Concept of Complementary Antennas
3.2 Rectangular Waveguide with an Infinite Flange
3.3 Coaxial Line with an Infinite Flange
3.4 Exercises
3.5 References
4. Dielectric Loading of Small Antennas
4.1 Dielectric Loading of Electric Dipole Antennas
4.2 Lossy Cores for Loops and Capacitor Type Antennas
4.2.1 Loop Antenna
4.2.2 Dipole Antenna
4.2.3 Comparison of the Two Antenna Types
4.3 Lossy Shells Surrounding Loops and Dipoles
4.4 Exercises
4.5 References
5. Transmission Line Theory of Buried Insulated Antennas
5.1 Impedance of the Buried Insulated Wire
5.2 Mutual Impedance of Two Buried Antennas
5.3 Surface Excitation by a Buried Vertical Line
5.4 References
6. Antennas in the Interface Between Two Media
6.1 Thin Insulated Wires
6.2 Long Slots
6.2.1 The Narrow Slot
6.2.2 The Wide Slot
6.2.3 The Radiation Efficiency of the Slot
6.3 Exercises
6.4 References
7. Cavity-Backed Slot Antennas
7.1 Rectangular Slots
7.1.1 Integral Equation for the Field Variation in the Slot
7.1.2 Variational Solution
7.1.3 Hallen's Method
7.2 Annular Slot
7.2.1 Slot Admittance
7.2.2 Cylindrical Cavity
7.2.3 Coaxial Cavity
7.3 Exercises
7.4 References
8. Slot Antennas with a Stratified Dielectric or Isotropic Plasma Layers
8.1 Admittance of a Rectangular Waveguide
8.1.1 The General Formulation
8.1.2 Slot Admittance with a Negligible Ex Component
8.1.3 Slot Admittance with a Non-negligible Ex Component
8.1.4 Slot Admittance for Thick Plasma Layers
8.1.5 Numerical Results
8.1.6 Admittance Measurements
8.2 Mutual Admittance Between Two Rectangular Waveguides
8.3 Admittance of an Annular Slot
8.3.1 General Information
8.3.2 One-term Approximation of the Aperture Fields
8.3.3 Two-term Approximation of Aperture Fields
8.3.4 Radiation Conductance in Terms of Surface Fields
8.3.5 Slots with Free Space and Plasma Layers
8.3.6 Buried Slot Antennas
8.4 Exercises
8.5 References
9. Impedance of Linear Antennas in the Presence of a Stratified Dielectric
9.1 Driving Point Impedance of a Single Antenna
9.1.1 Impedance Formulation
9.1.2 The Free Space Impedance of a Thin Antenna
9.1.3 Antennas in a Homogeneous Dielectric
9.1.4 Antenna in Dielectric Layers
9.1.5 Antennas in Dielectric or Plasma Cylinders
9.1.6 Insulated Antennas in Dissipative Medium
9.2 Mutual Impedance
9.2.1 Impedance Formulation
9.2.2 Limiting Impedance Values
9.2.3 Free Space Impedance
9.2.4 Antenna in Dielectric Layers
9.2.5 Insulated Antennas in Dissipative Medium
9.3 Exercises
9.4 References
10. Insulated Loops in Lossy Media
10.1 Impedance Formulation
10.2 Loops in a Homogeneous Lossy Dielectric or in Free Space
10.3 Loops in Finite Layers of Lossy Dielectric
10.4 Exercises
10.5 References
11. Antennas in Compressible Isotropic Plasma
11.1 Guided Waves Supported by Layers of a Lossy Compressible Plasma
11.1.1 Field Expressions
11.1.2 Dispersion Relations
11.1.3 Numerical Results
11.1.4 Complex Power of Guided Waves
11.2 Admittance of a Waveguide Backed Slot
11.2.1 Field Expressions for a Two-layer Plasma
11.2.2 Slot Admittance
11.2.3 Surface Waves
11.2.4 Numerical Results
11.3 Impedance of a Linear Antenna
11.3.1 Impedance Formulation
11.3.2 Surface Waves
11.3.3 Impedance of a Short Antenna in an Unbounded Plasma
11.3.4 Numerical Results
11.4 Exercises
11.5 References
12. Linear Antennas in a Magnetoionic Medium
12.1 Cylindrical Antenna with an Axial Static Magnetic Field
12.1.1 Field Expressions in the Cold Electron Plasma Medium
12.1.2 Antenna Impedance
12.1.3 Impedance of a Thin Antenna Without a Dielectric Layer
12.1.4 Discussion of Numerical Results
12.2 Flat Strip Antenna with a Perpendicular Static Magnetic Field
12.2.1 Field Expressions in the Plasma Medium
12.2.2 Reflection Coefficients
12.2.3 Antenna Driving Point Impedance
12.2.4 Impedance of a Thin Antenna Without a Dielectric Layer
12.2.5 Discussion of Numerical Results
12.2.6 Insulated Antennas Above a Ground Plane
12.3 Radiation from a Short Antenna in a Lossy Uniaxial Medium
12.3.1 Formulation of the Effective Resistance
12.3.2 Radiation in the Limit of Low Losses
12.3.3 Radiation at Large Distances in a Lossy Medium
12.3.4 Summary of Radiation Characteristics
12.4 Appendix: Strip Antenna with a Magnetic Field Perpendicular to the Axis and Parallel to the Surface
12.5 Exercises
12.6 References
Author Index
Subject Index
Other Titles in the Series
- No. of pages: 312
- Language: English
- Edition: 1
- Published: October 22, 2013
- Imprint: Pergamon
- Paperback ISBN: 9781483170565
- eBook ISBN: 9781483186375
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