복반사판 안테나의 설계 및 전파 특성 해석
Design and Analysis of Radiation Pattern on the Dual Reflector Antenna
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초록
본 논문에서는 위성통신에 사용가능한 복반사판 안테나를 설계하고 성능을 평가하도록 한다. 먼저 커러게이티드 혼 안테나의 설계를 위하여 설계 중심 주파수를 결정하고, 커러게이트의 벽 두께와 슬롯의 폭의 변화에 따른 특성 변화를 고찰하며, 커러게이트에 의해 발생하는 반사파를 억제하도록 입력 테이퍼 섹션을 설계하고, 교차편파가 발생하지 않도록 모드변환 섹션을 설계한다. 모드의 발생 억제를 위하여 천이 섹션과 출력플레어섹션에서 커러게이트의 높이를 조절하고, 위상의 중심점을 계산하며, 최고 및 최저 주파수에서 혼의 특성 변수를 계산한다. 옵셋 복반사판의 안테나 복사특성을 해석하도록 하는데, 회절기하이론을 이용하야 부반사판의 복사특성을 해석하고, 물리광학방법을 이용하여 주반사판의 복사특성을 해석하며, 회절기하이론과 물리광학방법을 결합하여 반사판 안테나의 복사특성을 해석한다.
Abstract
In this paper, we design a dual reflector antenna that can be used for satellite communication and evaluate its performance. First, the design center frequency is determined for the design of the corrugated horn antenna, and the change of the characteristic according to the variation of the wall thickness and the slot width of the corrugate is investigated. In order to suppress the reflected wave generated by the corrugate, suitable input tapere section must be designed and a mode conversion section is desiged in order that the cross polarization does not occur. In order to suppress the occurrence of the mode, the height of the corrugate is calculated in the transition section and the output flare section, the center point of the phase is calculated, and the horn characteristics are calculated at the highest and lowest frequencies. In order to analyze the antenna radiation characteristics of the offset reflective plate, we analyze the radiation characteristics of the sub reflector using the diffraction geometry theory, analyze the radiation characteristics of the main reflector using the physical optics method, Combine to interpret the radiation characteristics of the reflector antenna
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