Abstract
본 논문에서는 PCS/WCDMA/WiBro/S-DMB(1.750<TEX>${\sim}$</TEX>2.655 GHz) 공용 모노폴 안테나로서 사용 가능한 광대역 모노폴 안테나를 제안한다. 제안된 안테나는 FR-4 기판에 제작된 사다리꼴 모노폴 안테나의 후면에 패치를 추가하여 대역폭을 개선시킨다 제안된 안테나의 광대역 특성과 복사 패턴을 확인하기 위하여 설계된 안테나를 제작하고 복사 특성을 측정하여 계산된 결과와 비교하였다. 측정 결과는 계산 결과와 비슷하게 나타났으며, 사용대역 내에서 2 dBi 이상의 이득을 가지며, 1.73<TEX>${\sim}$</TEX>3.48 GHz 대역(중심 주파수 기준 67.2 %)에서 1.5:1 이하의 VSWR을 갖는 것으로 나타났다. 본 논문에서 설계된 모노폴 안테나는 PCS/WCDMA/WiBro/S-DMB 공용 실내용 안테나로 사용할 수 있을 것으로 생각된다. In this paper, a wide-band monopole antenna for use in PCS/WDCMA/Wivro/S-DMB(1.750<TEX>${\sim}$</TEX>2.655 GHz) band is presented. The presented antenna is a trapezoidal monopole antenna which has back-side patch and improves the bandwidth. To confirm the wide-band characteristics and radiation pattern of presented antenna, the experimental antenna is fabricated and its radiation characteristics are measured, compared with calculated results. It is shown that the designed antenna has VSWR less than 1.5, gain over 2 dBi in 1.73<TEX>${\sim}$</TEX>3.48 GHz. The measured results show good agreement with calculated results. From the result, we confirm that the designed antenna can be used indoor antenna for PCS/WCDMA/WiBro/S-DMB.
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