Journal of the Korea Institute of Information and Communication Engineering (한국정보통신학회논문지)

The Korea Institute of Information and Commucation Engineering (한국정보통신학회)
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Wideband Stacked Microstrip Antenna with Rectangular and Triangular Parasitic Patches for 860MHz Band

직사각형 및 삼각형 기생패치를 이용한 860MHz 대역 광대역 적층 마이크로스트립 안테나

  • Ko, Jin-Hyun (Electronic Communication Engineering. Chonnam National University) ;
  • Kim, Gun-Kyun (Electronic Communication Engineering. Chonnam National University) ;
  • Rhee, Seung-Yeop (Electronic Communication Engineering. Chonnam National University) ;
  • Lee, Jong-Ig (Division of Mechatroics Engineering. Dongseo University)
  • Received : 2016.04.04
  • Accepted : 2016.04.12
  • Published : 2016.05.31
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Abstract

A wideband stacked patch antenna with parasitic elements, rectangular and triangle shaped patches, is proposed. Two different shaped parasitic elements are placed in the above of main rectangular microstrip patch antenna in order to achieve wide bandwidth for 860 MHz band. Coupling between the main patch and parasitic patches is realized by thick air gap. The gap and locations of parasitic patches are found to be the main factor of the wideband impedance matching. The proposed antenna is designed and fabricated on a ground plane with small size of $119mm{\times}109mm$ for application of compact transceivers. The fabricated antenna on an FR4 substrate shows that the minimum measured return loss is below -11.68dB at 824 MHz and an impedance band of 818~919 MHz(11.7%) at 10dB return loss level. The measured radiation patterns are similar to those of a conventional patch antenna with maximum gain of 2.11 dBi at 824 MHz.

본 논문에서는 직사각형 및 삼각형 기생 패치를 이용한 광대역 마이크로스트립 패치 안테나를 제안하였다. 직사각형 마이크로스트립 패치 위에 직사각형 및 삼각형 모양의 기생 패치들을 적층하여 860MHz대역에서 광대역 특성을 얻었다. 주 방사부인 마이크로스트립안테나와 기생 패치와의 효과적인 결합은 이들 사이에 두꺼운 공기층을 두어 구현하였다. 또한, 이들 공기층 두께와 기생 패치의 위치는 광대역 정합에 중요한 요소임을 알 수 있었다. 제안된 안테나는 향후 소형 트랜시버에 적용하기 위해 $119mm{\times}109mm$ 크기의 소형 접지면 위에 설계 및 제작되었다. FR4기판에 제작된 안테나의 임피던스 대역은 818~919MHz(11.7%)이다. 방사패턴은 기존 마이크로스트립 패치 안테나와 유사했으며, 최대 이득은 주파수 824MHz에서 2.11dBi로 측정되었다.

Keywords

References

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