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l Introduction
1.1 Background and Demand
1.2 Research Development of the Omnidirectional Circularly
Polarized Antennas
1.2.1 Onmidirectional Circularly Polarized Antennas
1.2.2 Research on Omnidirectional Circularly Polarized
TaDered Beam Antenna
1.2.3 Omnidirectional Polarization Reconfigurable
Circularly Polarized Antenna
1.3 Content and Construction ofthe Book
References
2 Basic Theory of Omnidirectional Antenna and Slot Array
2.1 The Basic Theory ofthe Transmission Line
2.1.1 The Uniform Transmission Line
2.1.2 T11e State Parameters and Impedance ofthe TL
2.1.3 111e Short State ofthe Lossless TL
2.2 The Basic neory of Coaxial¢örave¡ªGuide
2.2.1 The Main Mode of Coaxial Transmission Lin¡§EM
2.2.2 TheParametersoftheMainModeinCTL
2.2.3 High Order Modes in the Coaxial Transmission Line
(CTL)
2.3 The Basic Theory to Slot AnteIma
2.4 Basic Theory ofArray Antenna
2.4.1 Product T11eoremofPaRem
2.4.2 Uniform Linear Array
2.4.3 Grating Lobe andthe Interval
2.5 Summary
References
3 Principles of Omnidirectional CP Slot Array Antenna
3.1 Introduction
3.2 Geometry Structure and Principle
3.2.1 Antenna Structure
3.2.2 Design Principle to Omnidirectional CP Radiation
Performance
3.2.3 Impedance Matching and Feed Design
3.3 Antenna Performance Simulation and Verification
3.4 Experiment Results Analysis
3.5 Improved Omnidirectional CP Coaxial Slots Antenna
with Compact Size and High Gain
3.5.1 Improved Antenna Geometry Structure
3.5.2 Improved Antenna Design
3.5.3 AntennaPerformanceDiscussion
3.6 Summary
References
4 Principies of Omnidirectional Dual¡¤CP Slot Array Antenna
4.1 Introduction
4.2 Geometry Structure£¬Principle and Antenna Design
4.2.1 Antenna Structure
4.2.2 Dual CP Principle
4.3 Antenna Performance Analysis
4.4 Summary
References
5 Dual CP Polarization Diversity and Space Diversity Antennas
Enabled by a Compact T-Shaped Feed Structure
5.1 Introduction
5.2 T-Shaped Feed Structure
5.2.1 TFS Geometry Structure
5.2.2 TFS Impedance Transformation
5.2.3 TFS Performance by Simulation
5.3 The Improved Dual CP Omnidirectional Antenna Fed by TFS
5-3.1 The Principle and Structure ofthe Improved DCPOA
5.3.2 Performance oftheImprovedDCPOA
5_3-3 DCPOA Parametric Study and Analysis
5.3.4 Experimental Verification and Analysis
5.3.5 Comparison with Other Dual CP Antenna
5.4 TFS.Enabled Space Diversity Antealia
5.4.1 The Principle ofthe SDA wim TFS
5.4.2 SDA Structure and Performance
5.4.3 ExperimentalVerification andAnalysis
5.4.4 Comparison with Other Spatial Diversity Antennas
5.5 Summary
References
6 A Circular Truncated Cone Slot Antenna with Circular
Polarized Conical Beam
6.1 Introduction
6.2 Antenna Design and Analysis
6.3 Parameter Analysis
6.4 Results and Discussion
6.5 Summary
References
7 Half-Space Covered Antenna for Air-Ground Communication
7.1 Introduction
7.1.1 111e Principle of the Half Space Covering Antenna
7.1.2 The Key Parameters of the Half Space Covering
Antenna
7.2 Performance Analysis
7.3 Summary
References
8 A Compact Reconligurable Coaxial Slot Antenna
8.1 Introduction
8.2 Design Principle
8.3 Simulation Results
8.4 Summary
References
9 The Omnidirectional£¬Directional Switchable Antenna Based
on the Curved Microstrip Antenna with Defected Ground
Structure
9.1 Introduction
9.2 Geometry Structure and Analysis Method
9.2.1 Antenna Geometry with Defected Ground
9.2.2 Equivalent Circuit
9.2.3 Simulation Method and Experiment Condition
9.3 ResultAnalysis forPlanarAntennawitIlDGS
9.3.1 Impedance
9.3.2 Lengthl
9.3.3 Length
9.3.4 Cavity
9.3.5 The Opt