Title :
Optimal design of an offset-fed, twin-slot antenna element for millimeter-wave imaging arrays
Author :
Qian, Yongxi ; Iwata, Shin-ichirou ; Yamashita, Eikichi
Author_Institution :
Dept. of Electron. Eng., Univ. of Electro-Commun., Tokyo, Japan
fDate :
7/1/1994 12:00:00 AM
Abstract :
The optimal design of an offset-fed, twin-slot antenna suitable for millimeter wave imaging arrays is reported. The dimensions of the antenna and the slot separation for realizing a desirable beam pattern are obtained by using the spectral domain method. The optimal position of the feeding microstrips for perfect impedance matching is determined through a full-wave analysis using the FD-TD method, which takes into consideration both the slot elements and the feeding networks. The input characteristics of an optimally designed antenna is evaluated with a network analyzer, where a reasonable agreement with theoretical predictions is obtained.<>
Keywords :
antenna feeders; antenna radiation patterns; finite difference time-domain analysis; impedance matching; microwave antenna arrays; microwave antennas; slot antennas; spectral-domain analysis; FD-TD method; beam pattern; feeding microstrips; full-wave analysis; impedance matching; input characteristics; millimeter-wave imaging arrays; network analyzer; offset-fed antenna; slot separation; spectral domain method; twin-slot antenna element; Antenna arrays; Antenna theory; Dielectric substrates; Impedance matching; Infrared detectors; Microstrip antennas; Millimeter wave technology; Resonance; Resonant frequency; Slot antennas;
Journal_Title :
Microwave and Guided Wave Letters, IEEE
