Journal of Advanced Marine Engineering and Technology

The Korean Society of Marine Engineering (한국마린엔지니어링학회)
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A study on RF characteristics of fishbone-type transmission line on PES substrate for application to flexible wireless communication device

플렉시블 무선통신소자 응용을 위한 PES 박막상의 Fishbone 형태의 전송선로에 대한 RF 특성연구

  • Yun, Young (Department of Radio Communication Engineering, Korea Maritime and Ocean University)
  • Received : 2013.07.11
  • Accepted : 2013.09.09
  • Published : 2014.03.31
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Abstract

In this work, a FTTL (fishbone-type transmission line) structure was fabricated on PES (polyether sulfone) for a realization of transparent flexible wireless communication device, and its RF characteristics were investigated. According to the results, the FTTL on PES showed a short wavelength characteristic compared with conventional coplanar waveguide. Concretely, the wavelength of the FTTL was 2.23 mm at 50 GHz, which was 56.6 % of the conventional coplanar waveguide. According to the bandwidth extraction result, the passband of the FTTL on PES was 608 GHz. Unlike conventional periodic structures, the characteristic impedance of the FTTL on PES showed a very low frequency dependency, which means that the FTTL on PES can be used for application to transmission line and distributed passive components with a broadband operation frequency.

본 연구에서는 소형화된 투명 플렉시블 무선통신소자 구현을 위해, 주기적 구조를 가지는 fishbone 형태의 전송선로를 PES (polyether sulfone) 박막상에 제작하였으며, 이에 관한 RF 특성을 고찰하였다. 그 결과에 의하면, PES 박막상에 제작된 fishbone 형태의 전송선로는 종래의 코프레너선로에 비해 단파장특성을 보여주었으며, 구체적으로 50 GHz에서 선로파장은 2.23 mm으로, 종래의 코프레너 선로의 56.6%이다. 삽입손실 측정결과에 의하면 fishbone 형태의 전송선로는 50 GHz 까지의 주파수 범위에서 1.31 dB보다 낮은 저손실특성을 보여주었다. 대역폭 추출결과에 의하면, PES 박막상의 fishbone 형태의 전송선로는 통과대역이 608 GHz인 광대역 특성을 보였다. PES 박막상의 fishbone 형태의 전송선로의 특성임피던스는 기존의 주기적 구조와는 달리 매우 적은 주파수 의존성을 나타내었으며, 이로 인해 광대역의 전송선로 및 광대역 분포형 수동소자에 이용될 수 있음을 알 수 있었다.

Keywords

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