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Wide-Range Antennas [Kõva köide]

  • Formaat: Hardback, 266 pages, kõrgus x laius: 234x156 mm, kaal: 570 g, 17 Tables, black and white; 2 Illustrations, color; 170 Illustrations, black and white
  • Ilmumisaeg: 01-Mar-2019
  • Kirjastus: CRC Press
  • ISBN-10: 1138487449
  • ISBN-13: 9781138487444
Teised raamatud teemal:
Wide-Range AntennasSuurem pilt
  • Formaat: Hardback, 266 pages, kõrgus x laius: 234x156 mm, kaal: 570 g, 17 Tables, black and white; 2 Illustrations, color; 170 Illustrations, black and white
  • Ilmumisaeg: 01-Mar-2019
  • Kirjastus: CRC Press
  • ISBN-10: 1138487449
  • ISBN-13: 9781138487444
Teised raamatud teemal:
Püsilink: https://www.kriso.ee/db/9781138487444.html
Märksõnad:

Expanding the range of antenna frequency is the main objective of this book. Solutions proposed are based on the development of new theoretical methods for analyzing and synthesizing antennas. The book shows that concentrated capacitive loads connected along linear and V-antennas provide a high level of matching with a cable over a wide frequency range and improves directional characteristics of antennas, i.e. increases the communication distance.

New theoretical methods are proposed for analysis and synthesis of antennas under consideration: 1) method of calculating directional characteristics of radiators with a given current distribution, and 2) method of electrostatic analogy for calculating mutual and total fields of complex multi-element radiating structures. These methods allow us to obtain optimal directional characteristics for director-type antennas (arrays of Yagi-Uda) and log-periodic antennas with concentrated capacitances and show that use of capacitors makes it possible to extend the frequency range of the director antennas and to decrease dimensions of the log-periodic antennas

Multi-element (flat and three-dimensional) self-complementary antennas with different variants of connecting generator poles and cable wires to antenna elements are proposed, which improves the matching with a cable. Characteristics of flat structures are compared with characteristics of volume structures: conical, parabolic, and located on a pyramid edges.

The book describes new versions of transparent antennas, antennas for cellular communication, multi-tier and multi-radiator antennas, and much more.

 

 

Introduction vii
PART 1 WIDE-RANGE ANTENNAS
1 Radiators with Distributed Loads
3(20)
1.1 Radiators with non-zero (impedance) boundary conditions---Constant surface impedance
3(5)
1.2 Impedance long line as an approximate equivalent of an impedance radiator
8(4)
1.3 Radiators with surface impedance changing along the antenna
12(7)
1.4 How do mistakes arise?
19(4)
2 Radiators with Concentrated Loads
23(27)
2.1 Capacitive loads and distribution of in-phase current along the radiator
23(10)
2.2 Creating in-phase current using the method of impedance line
33(8)
2.3 Creating in-phase current using the method of a metallic long line with loads
41(3)
2.4 Optimization of antenna characteristics by means of a mathematical programming method
44(6)
3 Solved Problems
50(17)
3.1 Optimal matching of linear radiators with constant capacitive loads
50(6)
3.2 Creating a required current distribution in a given frequency range
56(2)
3.3 Reducing the influence of nearby metal superstructures
58(2)
3.4 An optimal matching of V-radiators with constant capacitive loads
60(7)
4 Directional Characteristics of Radiators with Capacitive Loads
67(24)
4.1 Calculating the directional patterns of radiators with a given current distribution
67(10)
4.2 Method of electrostatic analogy
77(9)
4.3 Decreasing dimensions of log-periodic antennas
86(5)
5 Adjustment of Characteristics of Self-complementary Antennas
91(19)
5.1 Volume self-complementary radiators
91(4)
5.2 Self-complementary radiators on a conic surface
95(2)
5.3 Self-complementary radiators on a parabolic surface
97(4)
5.4 Antenna on a pyramid edges
101(9)
6 Self-complementary Antennas with Rotation Symmetry
110(17)
6.1 Flat antennas
110(4)
6.2 Procedure of calculating flat self-complementary antennas
114(5)
6.3 Three-dimensional antennas with rotation symmetry
119(8)
PART 2 MULTI-FREQUENCY ANTENNAS
7 Multi-wire Structures Parallel to Metal Surface
127(16)
7.1 Related long lines parallel to the ground
127(4)
7.2 Meandering loads of wire antennas
131(8)
7.3 Voltages and currents in meandering loads
139(4)
8 Folded Antennas, Perpendicular to Metal Surface
143(27)
8.1 Symmetrical structure
143(7)
8.2 Structures with wires of different length and diameter
150(6)
8.3 Losses in the ground
156(4)
8.4 Impedance folded radiators
160(10)
9 Multi-folded Antennas, Perpendicular to Metal Surface
170(21)
9.1 Principle of operation and method of calculation
170(6)
9.2 Electrical characteristics of multi-folded radiators
176(3)
9.3 Using multi-folded radiators in compensation devices
179(12)
10 Multi-wire and Multi-radiator Antennas
191(9)
10.1 Multi-wire antenna
191(2)
10.2 Multi-radiator antenna
193(7)
11 Multi-tiered and Log-periodic Coaxial Antennas
200(29)
11.1 Multi-tiered antenna
200(10)
11.2 Log-periodic coaxial antennas
210(19)
12 Different Issues
229(20)
12.1 Antenna with arbitrary single load
229(6)
12.2 Transparent antennas
235(5)
12.3 Field of a rectangular loop
240(9)
References 249(4)
Index 253
Boris Levin was born in Saratov, Russia, in 1937. He received a Ph.D. in Radio Physics in 1969 and Doctor of Sciences degree in Physics and Mathematics (Russian equivalent of Professorship) from S.-Petersburg Polytechnic University in 1993. From 1963 to 1998, he worked for the Design Department "Svyazmorproyekt" of the Russia Shipbuilding Ministry. He has been with the Holon Institute of Technology, Israel since 2008. Levin Boris has authored 7 books on antennas and electrodynamics, 4 of them in English, including "Antenna Engineering: Theory and Problems" (CRC Press, 2017), and 87 original articles in technical journals, 87 papers in proceedings of international scientific conferences, and has 45 patents.