상세정보
학술지
Multiplexed Cassegrain Reflector Antenna for Simultaneous Generation of Three Orbital Angular Momentum (OAM) Modes
- 발행일
- 201606
- 출처
- Scientific Reports, v.6, pp.1-8
- ISSN
- 2045-2322
- 출판사
- Nature Publishing Group
- 협약과제
- 16MR2200, (통합)모바일 빅뱅 시대의 주파수 효율 개선 핵심 기술 개발, 최형도
- 초록
- A multiplexed Cassegrain reflector antenna with a 2 × 2 open-ended rectangular waveguide (OERW) matrix feed and an orbital angular momentum (OAM) mode mux is proposed for the simultaneous generation of three OAM modes (l = 0, 짹1). The OAM mode mux (OMM) was designed using sequential combinations of quadrature hybrids, crossovers, and phase shifters to multiplex and demultiplex three OAM modes at the same time. The 2 × 2 OERW matrix feed and the OMM were separately measured and their performances were verified according to proposed theories. A near-field antenna measurement for a multiplexed Cassegrain reflector antenna was conducted to obtain the far-field magnitude and phase patterns around polar elevation angle 罐 and azimuthal angle 過, thus confirming that our antenna can produce three OAM modes simultaneously. We also measured the communication link characteristics of two identical multiplexed antennas. The measurement results show that the channel isolation of three OAM modes is more than 12.7 [dB] and 17 [dB] for fixed and compensated receiver positions, respectively, indicating that the proposed antenna system can be used for independent communication links with the same frequency and polarisation.
- KSP 제안 키워드
- Cassegrain reflector, Communication link, Far-field, Field magnitude, Magnitude and phase, OAM modes, Orbital Angular Momentum, Phase Shifter, Reflector antenna, azimuthal angle, distributed antenna systems(DAS)