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High Efficiency Slot Array Based on a Single Waveguide-Fed Cavity Backed Sub-Array  

Jung Kangjae (Department of Radio Science & Engineering, Kwangwoon University)
Lee Hak-Yong (Department of Radio Science & Engineering, Kwangwoon University)
Park Myun-Joo (Department of Radio Science & Engineering, Kwangwoon University)
Lee Byungje (Department of Radio Science & Engineering, Kwangwoon University)
Publication Information
The Journal of Korean Institute of Electromagnetic Engineering and Science / v.15, no.12, 2004 , pp. 1141-1146 More about this Journal
Abstract
The antenna array for receiving satellite broadcasting of Koreasat III is proposed. A cavity-backed slot antenna array is proposed to reduce feed line loss, increase the radiation efficiency, and make the feed network simple. A sub-array consists of $2{\times}4$ slot elements backed by a single cavity. By proper choice of dimensions it is shown that the proposed antenna has characteristics of the high radiation efficiency and the broad frequency bandwidth. Antenna characteristics for the array antenna with 256 elements are measured in Ku-band. A single cavity backed-sub-array has the gain of 18 dEi. The gam of the total antenna array(256 elements) is Over 33 dEi.
Keywords
Slot Array Antenna; Cavity-Backed Antenna; Antenna For Receiving Satellite Broadcasting; Fed-Waveguide;
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