Abstract

OTM(On-The-Move) 위성통신 시스템은 차량에 탑재되어 고속 주행하거나 요동이 심한 지역을 주행하면서 위성 통신 링크를 안정적으로 유지하여야 한다. 따라서 열악한 환경에서도 정밀 추적이 가능하고, 차량에 탑재할 수 있도록 소형/경량화된 위성 추적 시스템이 필요하다. 2개의 슬롯(slot)으로 구성된 단일 모드 커플러를 사용하여, 원형 편파 특성을 이용하여 하나의 물리적 채널로 상하, 좌우 2개의 차신호를 동시에 비콘 수신기까지 전달하는 방안을 제안하고, 측정된 추적 오차신호를 제시한다. The main mission of OTM(On-The-Move) satellite communication system is to provide satellite communication service while moving on a vehicle. So it should have a capability to maintain a reliable communication channel when it travels at high speeds or in a severe fluctuation region. This paper presents a small-sized multi-mode monopulse structure applicable to OTM satellite communication system which has only single mode-coupler with a pair of slot using a feature of circular polarized received signal. And tracking error signal is defined using fundamental and high-order modes.

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