상세정보
학술지
Fiber-Optic Rotary Joint and Optical Link for RF-Antenna Measurement
- 발행일
- 201004
- 출처
- IEEE Photonics Technology Letters, v.22 no.7, pp.447-449
- ISSN
- 1041-1135
- 출판사
- IEEE
- 협약과제
- 09MR6600, 무선통신 ERP/EIRP 측정기술 및 기준 연구, 윤재훈
- 초록
- A practical optical rotary joint and optical links were prepared for an antenna measurement. The rotational variation loss of the optical rotary joint depends on the mechanical misalignments. To achieve 0.2 dB or less rotational variation loss, we proposed a new structure that has a noncontact interface using two size-mismatched fibers without a lens. The optical links are made of a distributed-feedback laser diode, a PIN-photodetector, and single-mode fiber jumper cords. The proposed rotary joint has very low rotational variation loss. The optical links are sufficiently stable to be applied to the antenna measurement. We verified that the rotary joint and optical links can be adopted in RF antenna test applications. © 2010 IEEE.
- KSP 제안 키워드
- Antenna Measurements, Distributed feedback lasers(DFBs), Fiber optic, Laser diode(LD), RF Antenna, Rotary joint, Single-mode fiber(SMF), optical link