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- W2125770637 abstract "본 논문에서는 임피던스 대역폭 비가 2 : 1 이상의 광대역 특성을 갖고 이득이 최소 3.5 dBi 이상인 quasi-Yagi 안테나(QYA) 설계방법에 대해 연구하였다. QYA는 코프래너 스트립에 내장된 마이크로스트립으로 급전되며, 평면 다이폴과 그에 근접하는 도파기, 그리고 접지면 반사기 등 3 개의 소자로 구성된다. 폭이 넓은 직사각 패치 모양의 도파기를 스트립 다이폴 가까이 두어서 광대역 정합 특성을 구현하였다. 시뮬레이션을 통해 1.6-3.5 GHz (대역폭 비 2.2 : 1) 대역용으로 최적화된 3 소자 QYA를 FR4 기판 상에 <TEX>$90mm{times}90mm$</TEX> 크기로 제작하여 특성을 실험하였다. 실험결과, VSWR < 2 인 임피던스 대역은 1.56-3.74 GHz(대역폭 비 2.4 : 1), 피크이득은 4.2-6.3 dBi이고, 전후방비(FBR)는 13.6 dB 이상 이다. In this paper, we studied a design method for a quasi-Yagi antenna (QYA) with broadband characteristics of an impedance bandwidth ratio greater than 2 : 1 and a gain > 4 dBi. The QYA is fed by a microstrip line fabricated on a coplanar strip line and it consists of 3 elements; a planar dipole, a nearby director close to the dipole, and a ground plane reflector. By placing a wide rectangular patch-type director near to the dipole driver, broadband characteristics are achieved. An optimized 3-element QYA for operation over 1.6-3.5 GHz (bandwidth ratio 2.2 : 1) is fabricated on an FR4 substrate with a size of 90 mm by 90 mm and tested experimentally. The results show an impedance bandwidth of 1.56-3.74 GHz (bandwidth ratio 2.4 : 1) for VSWR < 2, a peak gain of 4.2-6.3 dBi, and a front-to-back ratio (FBR) > 13.6 dB within the bandwidth." @default.
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- W2125770637 date "2012-10-30" @default.
- W2125770637 modified "2023-09-26" @default.
- W2125770637 title "Design of a Broadband Quasi-Yagi Antenna with a 2:1 Impedance Bandwidth Ratio" @default.
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- W2125770637 doi "https://doi.org/10.12673/jkoni.2012.16.5.760" @default.
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