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Design of Wide Band Antennas for Mobile Communications

이동통신용 광대역 패치 안테나 설계

  • Kim, Jang-Wook (Dept. of Information Electronics, Dongyang Mirea University)
  • 김장욱 (동양미래대학교 전기전자통신공학부 정보전자과)
  • Received : 2013.02.14
  • Accepted : 2013.03.12
  • Published : 2013.03.30

Abstract

A wideband patch antenna fed by an L-strip feeder is studied. The objective of this paper is to design small wideband antenna for 3G and 4G wireless mobile communication service. The enhanced features were confirmed and proved by comparing the proposed antenna with the antennae that have been reported in the relevant literatures. Measurement results confirm that an impedance bandwidth($VSWR{\leq}2$) of 636MHz(32.5%, fo=1,960MHz) is achieved at 3G and 4G frequency band for L-strip-fed triangular patch antenna. In general, probe feed has only the parasitic reactance caused by the probe, which reduces the bandwidth performance of the antenna. The experimental results proved that the effects of improvement could be achieved because the proposed antenna is capable of compensating the parasitic reactance from the feeding mechanism. The studied antenna can be designed easily for extension of array because it has simple structure.

L-스트립 급전선에 의해서 급전되는 광대역 패치 안테나를 연구하였다. 본 논문의 목표는 3G와 4G 이동통신 서비스를 위한소형광대역안테나를설계하는데목표를두었다. 기존 유사 연구문헌에 보고 되었던 안테나와 본 논문의 제안된 안테나를 비교하여 개선된 효과를 입증하였다. L-스트립 급전의 삼각형 패치 안테나의 측정결과에서 636MHz(32.5%, fo=1,960MHz)의 임피던스 대역폭($VSWR{\leq}2$)이 3G와 4G 주파수 대역에서 얻어지는 것을 확인하였다. 일반적으로 Probe 급전방식의 경우 Probe에 의해서 기생 리액턴스가 야기되며 이로 인하여 안테나의 대역폭 특성을 저하시킨다. 측정결과를 통해서 제안된 안테나가 급전구조로부터 발생되는 기생 리액턴스를 보상할 수 있기 때문에 개선효과를 얻을 수 있었다는 것을 입증하였다. 연구된 안테나는 단순한 구조 때문에 어레이 확장이 쉽게 설계될 수 있다.

Keywords

References

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  1. 위성수신용 마이크로스트립 어레이 안테나 설계 vol.19, pp.10, 2013, https://doi.org/10.9708/jksci.2014.19.10.071