Journal of Space Technology and Applications (우주기술과 응용)

The Korean Space Science Society (한국우주과학회)
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Analysis of Radio Frequency (RF) Characteristics and Effectiveness according to the Number of Gores of Mesh Antenna

그물형 안테나의 고어 개수에 따른 Radio Frequency (RF) 특성 분석

  • 김진혁 ((주)솔탑 초소형위성연구팀) ;
  • 이시아 ((주)솔탑 초소형위성연구팀) ;
  • 박태용 ((주)솔탑 초소형위성연구팀) ;
  • 최한솔 ((주)솔탑 초소형위성연구팀) ;
  • 김홍래 ((주)솔탑 초소형위성연구팀) ;
  • 채봉건 ((주)스텝랩 우주비행체열기술팀) ;
  • 오현웅 ((주)스텝랩 우주비행체열기술팀)
  • Received : 2021.09.30
  • Accepted : 2021.11.09
  • Published : 2021.11.30
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Abstract

This research discusses the change in radio frequency (RF) characteristics according to the number of Gores on the deployable mesh antennas for potential micro-satellite applications. The deployable type of lightweight mesh antenna can be used for various space missions such as communication/SAR/ SIGINT. In order to implement an ideal curvature of antenna surface, sufficient number of antenna rib structures are required. However, the increase in antenna ribs affects various design factors of the antenna system, especially total system mass, complexity of deployable mechanism and reliability. In this paper, the proper number of ribs for the mesh antenna were derived by comparison of electro-magnetic (EM) simulation results of example of antenna model in accordance with the various number of ribs.

본 논문에서는 초소형 위성에 적용할 수 있는 전개형 메쉬 안테나의 Gore 특성에 따른 radio frequency (RF) 특성 변화에 관해 논한다. 메쉬 안테나의 경우 다양한 초소형위성에 탑재할 수 있으며, 통신/영상레이다/SIGINT 등 다양한 우주임무에 활용이 가능하다. 이상적인 안테나 곡면을 형성하기 위해서는 충분한 개수의 안테나 Rib 구조로 반사판을 구현해야 한다. 그러나 안테나 Rib 개수 증가에 따라 안테나 질량을 비롯해 기계적인 전개 메커니즘의 복잡도 및 전개 신뢰성 등 다양한 설계인자에 영향을 미치게 된다. 본 논문에서는 안테나의 RF 성능 열화 최소화 관점에서 적정 안테나 Rib의 개수를 도출하기 위해 메쉬 안테나의 예시 모델을 대상으로 다양한 Rib 개수에 따른 RF 시뮬레이션을 통해 비교분석을 수행하였다.

Keywords

Acknowledgement

본 연구는 2020년도 과학기술정보통신부의 재원으로 한국연구재단 스페이스챌린지 사업의 지원을 받아 수행되었음(NRF-2020M1A3B8084734).

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