Journal of the Korea Institute of Military Science and Technology (한국군사과학기술학회지)

The Korea Institute of Military Science and Technology (한국군사과학기술학회)
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A Study on Configuration of True Time Delay Phase Shifter for Wideband Beam Steering Phased Array Antenna

광대역 빔 조향을 위한 위상 배열 안테나의 실시간 지연 위상 천이기 구성에 관한 연구

  • Jung, Jinwoo (The 2nd Research and Development Institute, Agency for Defense Development) ;
  • Ryu, Jiho (The 2nd Research and Development Institute, Agency for Defense Development) ;
  • Park, Jaedon (The 2nd Research and Development Institute, Agency for Defense Development) ;
  • Seo, Jongwoo (The 2nd Research and Development Institute, Agency for Defense Development)
  • 정진우 (국방과학연구소 제2기술연구본부) ;
  • 류지호 (국방과학연구소 제2기술연구본부) ;
  • 박재돈 (국방과학연구소 제2기술연구본부) ;
  • 서종우 (국방과학연구소 제2기술연구본부)
  • Received : 2016.09.19
  • Accepted : 2017.04.14
  • Published : 2017.06.05
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Abstract

We investigate the performance of a true time delay(TTD) phase shifter to reduce the beam squint caused by frequency changes of a phased array antenna in wideband communication systems. To design a high gain phased array antenna, we need a long TTD, which causes high RF loss, low resolution and large dimension of TTD phase shifters. To overcome the problems, we propose a schematic of dual TTD phase shifters, which consists of short time delay(STD) in radio frequency(RF) part and long time delay(LTD) in intermediate frequency(IF) part. Our analysis results show that the proposed scheme reduces the required bits and delay time in RF band of the TTD compared to the conventional single TTD scheme.

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References

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