Full-Wave Optimization of Linear, Edge Slot Array with Flare and Choke for Decreased Vertical Beamwidth and Cross-Polarization

Author

Young, John C. ; Kazama, Yasuhiro ; Hirokawa, Jiro ; Ando, Makoto

Author_Institution

Japan Radio Corp., Ltd., Tokyo

fYear

2006

fDate

9-14 July 2006

Firstpage

2761

Lastpage

2764

Abstract

A method is presented in this paper to rigorously analyze and design a linear edge slot array with appendages attached to the external structure. The analysis method is a finite element boundary integral (FE-BI) method that uses a spectrum of two-dimensional solutions to compute the boundary integral terms. Full array optimization is performed by iteration to obtain slot dimensions that produce the desired aperture distribution. Since the optimization attempts to control the slot electric fields directly, side lobe levels within a few dB of ideal results are obtained. A flare with a choke is proposed to control the vertical beamwidth and cross-polarization. Results for an optimized 75-slot array are given and discussed and good corroboration of the data is obtained with Ansoft´s HFSS

Keywords

aperture antennas; boundary integral equations; electromagnetic wave polarisation; finite element analysis; inductors; iterative methods; linear antenna arrays; slot antenna arrays; 75-slot array; aperture distribution; boundary integral terms; choke; cross-polarization; decreased vertical beamwidth; finite element boundary integral method; flare; full-wave optimization; linear edge slot array; side lobe levels; slot electric fields; Admittance; Antenna arrays; Aperture antennas; Design optimization; Error correction; Inductors; Integral equations; Manufacturing; Resonance; Slot antennas;

fLanguage

English

Publisher

ieee

Conference_Titel

Antennas and Propagation Society International Symposium 2006, IEEE

Conference_Location

Albuquerque, NM

Print_ISBN

1-4244-0123-2

Type

conf

DOI

10.1109/APS.2006.1711176

Filename

1711176