논문 해외 국제전문학술지(SCI급) WIDEBAND BRANCHLINE COUPLER USING SYMMETRICAL FOUR-STRIP INTERDIGITATED COUPLER
- 학술지 구분 국제전문학술지(SCI급)
- 게재년월 2014-03
- 저자명 정영배단독
- 학술지명 ELECTRONICS LETTERS
- 발행처명 IEE-INST ELEC ENG
- 발행국가 해외
- 논문언어 외국어
홈페이지논문 초록 (Abstract)
A wideband 180° branchline coupler with an interdigitated coupler is presented, which is composed of symmetrical four quarter-wavelength strips and replaces a long branch of 3λg/4 length in conventional ring hybrid couplers. Using the proposed structure, this coupler has a wideband performance of 62% at the centre frequency with compact size. Furthermore, an excellent power dividing balance of ±0.25 dB and a phase difference of ±2° between output ports are realised. The proposed coupler is easy to design and fabricate with a single dielectric substrate in a microstrip structure.