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Conference Paper
Performance Comparison of Orbital Angular Momentum Modes using Deformed Cassegrain Reflector Antennas
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- Authors
- Woo Jin Byun, Y.-S. Lee, B. S. Kim, K. S. Kim, M. S. Kang, M. S. Song, Yong Heui Cho
- Issue Date
- 2016-08
- Citation
- Asia-Pacific Radio Science Conference (AP-RASC) 2016, pp.17-19
- Language
- English
- Type
- Conference Paper
- Abstract
- A parabolic reflector antenna with an azimuthally deformed Cassegrain subreflector is proposed to effectively generate arbitrary orbital angular momentum (OAM) modes. The Cassegrain dual-reflector antenna was fabricated for 18 GHz and measured in the near-field range. The nearfield to far-field transformed radiation phase around a full azimuth shows that the proposed antenna generates fields with the l = 1 OAM mode. Simulated and measured feed reflection coefficients are below -10 dB for 15.1-21.2 GHz, even though the distance between a horn feed and a deformed subreflector is 15.6 mm, thus it is expected that the proposed structure can be used for a broadband low-profile antenna.
- KSP Keywords
- 18 GHz, Cassegrain reflector, Far-field, Near-field, Parabolic reflector antenna, Performance comparison, dual-reflector antenna, low-profile antenna, orbital angular momentum(OAM), reflection coefficient