한국정보기술응용학회:학술대회논문집 (Proceedings of the Korea Society of Information Technology Applications Conference)

한국정보기술응용학회 (The Korea Society of Information Technology Applications)
권호 표지

A wideband balun of tapered structure using planar microstrip

  • Chang, Tae-Soon (Dept. of Electronics, Information & Communication Eng., Konkuk University) ;
  • Chang, Rae-Kim (Dept. of Electronics, Information & Communication Eng., Konkuk University) ;
  • Hur, Jung (Dept. of Electronics, Information & Communication Eng., Konkuk University)
  • 발행 : 2005.11.25
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초록

In this paper, a wideband balun of tapered structure using planar microstrip is desigde ad analyzed. The balun structure was fabricated on a Teflon substrate with a thickness of 0.8mm and relative dielectric constant ${\varepsilon}_r$ of 2.5. Two back-to back CPW-to-CPS transitions were simulated and optimized using HFSS. A movel plaar balun using tapered structure of microstip to CPW is suggested and designed. The measurement result, the bandwidth for a reflection coefficient better than -10dB of the balun is 2GHz to 8GHz. The planar balun can improved the performance of wide band spiral antenna.

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