The Transactions of The Korean Institute of Electrical Engineers (전기학회논문지)

The Korean Institute of Electrical Engineers (대한전기학회)
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Design of 0.6~6 GHz Ultra Wideband Quad-ridge Horn Antenna

0.6~6 GHz 초 광대역 쿼드릿지 혼 안테나 설계

  • Choi, Cheoljin (Dept. of IT Engineering, Soonchunhyang University) ;
  • Lee, Moonhee (Dept. of IT Engineering, Soonchunhyang University) ;
  • Son, Taeho (Dept. of IT Engineering, Soonchunhyang University)
  • Received : 2018.08.24
  • Accepted : 2018.11.29
  • Published : 2019.01.01
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Abstract

In this paper, a 0.6~6GHz quad-ridge horn antenna which can be used for the antenna measurement of 5.8GHz WiFi system from lowest frequency band of mobile LTE (Long Term Evolution) is designed and implemented. The quad-ridge horn antenna has quadruple ridges of exponential function, a back-short and a cavity. Based on this structure, we design the cavity size, ridge gap and feed gap to have broadband characteristics. For implementation, the plates material of aluminum and copper are used for the horn and four ridges, respectively. And the insulator supports are used to maintain the gap between ridges. By measurement, antenna has the gain of 6.2~13.35dBi with the return loss of less than -6dB (under VSWR 3 : 1) in the entire design band. The results of this study can be widely used to the antenna studies on the mobile communication including low frequency band of LTE, the EMI measurement and the standard calibration measurement.

Keywords

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그림 1 제안 안테나의 구조 Fig. 1 Structure of proposed antenna

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그림 2 릿지의 수치 Fig. 2 Ridge dimensions

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그림 3 안테나의 릿지 구조 Fig. 3 Ridge structure of antenna. (a) ridge model (b) gapand width between ridges

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그림 4 릿지 간격 변화에 따른 반사손실 변화 Fig. 4 Return loss as a function of ridge gap

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그림 5 캐비티 구조 Fig. 5 Cavity structure

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그림 6 급전 지점 단면도 Fig. 6 Section view of feed points. (a) point P1 (b) point P2

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그림 7 급전 지점의 간격 변화에 따른 반사손실 Fig. 7 Return loss as a function of feed points

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그림 8 제작된 쿼드릿지 혼 안테나 Fig. 8 Implemented a quad-ridge antenna

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그림 9 제작된 안테나의 반사손실과 정재파비 Fig. 9 Return loss and VSWR of the Implemented antenna. (a) return loss (b) VSWR

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그림 10 제작된 혼 안테나의 방사패턴 Fig. 10 The radiation pattern of the Implemented horn antenna. (a) E-plane radiation pattern(0.698 GHz) (b) H-plane radiation pattern(0.698 GHz) (c) E-plane radiation pattern (3.0 GHz) (d) H-plane radiation pattern(3.0 GHz) (e) E-plane radiation pattern(5.8 GHz) (f) H-plane radiation pattern(5.8GHz)

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그림 11 주파수에 따른 이득변화 Fig. 11 Gain variation with frequency

표 1 제안 안테나의 치수 Table 1 Dimensions of proposed antenna.

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