Abstract
본 논문에서는 해양인명구조 시스템에서 송신부인 구명조끼의 무선 송신기로부터 송신된 조난 신호를 효과적으로 수신하기위한 426MHz 대역 패널 형태의 평판형 마이크로스트립 안테나를 설계 및 제작하였다. 제작이 용이하고, 가벼우며, 적은 제작비용이 장점인 마이크로스트립(Microstrip) 안테나 구조를 이용하였으며, 협대역, 저이득, 큰 사이즈 특성을 극복하기 위하여 IDMA(Identical Dual Patch Microstrip Antenna with Air-Gap) 구조를 응용하여 설계하였다. 안테나는 유전율 4.3, 두께 1.6mm를 갖는 FR4를 사용하여 제작하였으며, 측정된 안테나의 대역폭은 <TEX>$S_{11}=-10dB$</TEX> 이하에서 28.7MHz(약 6.6%), 이득은 426MHz에서 3.04dBi로 우수한 특성을 얻었다. 또한, 상용 송수신모듈을 사용한 거리측정 실험을 통하여 5km 이상의 송수신거리의 안정적인 통신성능을 확인하였다. 본 논문에서 제안한 안테나는 향후 UHF 대역 통신시스템의 기지국분야에 다양하게 응용될 수 있을 것이다. The planar microstrip antenna for the safety communication of life at sea is designed and manufactured to effectively receive the emergency wireless signal from the transmitter on the life vest. The proposed microstrip antenna in this paper is easy to make, light weight and cheap compared to other antennas because of printed antenna fabrication. To overcome the narrow bandwidth, large size and low gain characteristics of microstrip antenna, we use the IDMA(Identical Dual Patch Microstrip Antenna with Air-Gap) structure. The proposed antenna was fabricated with the use of 1.6mm FR4 and measured with the 28.7MHz(6.6%) of bandwidth and 3.04dBi of gain at the frequency of 426MHz. To validate the proposed antenna, we experimented the possible distance range at sea using the commercial UHF transceiver module and obtained over 5km distance for stable communication. This antenna can be widely applied to application of the UHF wireless mobile communication.
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