The Journal of Korean Institute of Electromagnetic Engineering and Science (한국전자파학회논문지)

The Korean Institute of Electromagnetic Engineering and Science (한국전자파학회)
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SIW-Based 2×4 Array Antenna with a Sequential Feeding for X-Band Satellite Communication

순차적 급전을 이용한 위성 통신용 SIW 2×4 배열 안테나

  • Jung, Eun-Young (Department of Electronic Engineering and Avionics, Korea Aerospace University) ;
  • Lee, Jae-Wook (Department of Electronic Engineering and Avionics, Korea Aerospace University) ;
  • Lee, Taek-Kyung (Department of Electronic Engineering and Avionics, Korea Aerospace University) ;
  • Lee, Woo-Kyung (Department of Electronic Engineering and Avionics, Korea Aerospace University)
  • 정은영 (한국항공대학교 전자 및 항공전자공학과) ;
  • 이재욱 (한국항공대학교 전자 및 항공전자공학과) ;
  • 이택경 (한국항공대학교 전자 및 항공전자공학과) ;
  • 이우경 (한국항공대학교 전자 및 항공전자공학과)
  • Published : 2011.02.28
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Abstract

In this paper, SIW-based $2{\times}4$ uniform array antenna with a sequentially fed 8-way power divider with an equal division characteristic is proposed for an application of X-band satellite communication. In particular, sequential feeding structures with a progressive phase difference of 90 degrees between the nearest elements have been suggested to protect the cancellation of electric fields due to the array alignments and to enhance the purity of RHCP(Right-Handed Circular Polarization). The obtained results according to the return loss bandwidth, RHCP antenna gain, axial ratio bandwidth are 760 MHz ranging from 7.90 to 8.66 GHz under the criterion of less than -10 dB, 14.3 dBic at 8.3 GHz, and 600 MHz from 8.15 to 8.75 GHz, respectively. In addition, it is observed that the equal-division characteristic of SIW-based 8-way power divider is approximately -9.2 dB in all ports.

본 논문에서는 순차적 급전을 이용한 위성 통신용 $2{\times}4$ 균일 배열 안테나(uniform array antenna)와 각 안테나 소자로 균등 급전을 하기 위한 8분기 전력분배기 구조를 제안하였다. 제안된 배열 안테나는 배열 구조에 의한 전계 상쇄 현상을 방지하고, 순도 높은 원형 편파(RHCP)를 발생시키기 위하여 순차적 급전 방식을 적용하였다. 각각의 안테나 소자에 90도 위상 지연 선로를 첨가하여 순차적 급전을 이루었고, 각각에서 발생하는 전계의 방향도 일치하도록 하였다. 설계된 위성 통신용 $2{\times}4$ 배열 안테나의 반사 손실은 -10 dB 기준 대역폭이 760 MHz(7.90~8.66 GHz), RHCP 이득은 8.3 GHz에서 14.3 dBic, 3 dB 축비 대역폭은 600 MHz(8.15~8.75 GHz)의 특성을 나타내었고, 전력분배기는 8개의 port에서 -9.2 dB의 동일한 전달 특성을 나타내었다.

Keywords

References

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