상세정보
학술지
Microwave Orbital Angular Momentum Mode Generation and Multiplexing Using a Waveguide Butler Matrix
- 발행일
- 201706
- 출처
- ETRI Journal, v.39 no.3, pp.336-344
- ISSN
- 1225-6463
- 출판사
- 한국전자통신연구원 (ETRI)
- 협약과제
- 15MR3700, (통합)모바일 빅뱅 시대의 주파수 효율 개선 핵심 기술 개발, 최형도
- 초록
- In this paper, we propose a convenient microwave orbital angular momentum (OAM) mode generation and multiplexing method operating in the 18 GHz frequency band, based on a 2 × 2 uniform circular array and a 4 × 4 Butler matrix. The three OAM modes -1, 0, and +1 were generated and verified using spatial S-parameter measurements; the measured back-to-back mode isolation was greater than 17 dB in the full 17 GHz to 19 GHz range. However, the radiated OAM beam centers were slightly dislocated and varied with both frequency and the mode index, because of the non-ideal characteristics of the Butler matrix. This resulted in mode isolation degradation and transmission distance limitations.
- KSP 제안 키워드
- 17 GHz, 18 GHz, GHz range, Mode isolation, Non-ideal, OAM modes, Orbital angular momentum mode, S-parameter measurements, Transmission distance, back-to-back, butler matrix
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