Hamiltonian approach to reactance optimization in ESPAR antennas

Author

Komatsuzaki, Akira ; Saito, Shigeru ; Gyoda, Koichi ; Ohira, Takashi

Author_Institution

ATR Adaptive Commun. Res. Labs., Kyoto, Japan

fYear

2000

fDate

2000

Firstpage

1514

Lastpage

1517

Abstract

A novel approach based on the Hamiltonian dynamics is devoted for the first time to the optimization of the loaded reactances in electronically steerable passive array radiator (ESPAR) antennas. The optimum set of reactances to maximize the antenna gain is found by tracing the locus of a virtual particle behaviour on the dynamics. The algorithm and detailed simulation results are shown for a 5-element ESPAR antenna. Along with optimized reactances, directional gains of 9 dBi±0.5 dB are obtained for full 360-degree azimuthal angles. This approach is five times faster than conventional random-search techniques such as the Monte Carlo method

Keywords

antenna radiation patterns; antenna theory; beam steering; electric reactance; monopole antenna arrays; optimisation; 5-element antenna; ESPAR antennas; Hamiltonian dynamics; antenna gain; dynamics; electronically steerable passive array radiator antennas; loaded reactances; reactance optimization; virtual particle behaviour; Adaptive arrays; Antenna radiation patterns; Array signal processing; Coaxial components; Directive antennas; Electric variables control; Heuristic algorithms; Inductors; Loaded antennas; Optimization methods;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Conference, 2000 Asia-Pacific

Conference_Location

Sydney, NSW

Print_ISBN

0-7803-6435-X

Type

conf

DOI

10.1109/APMC.2000.926125

Filename

926125