A Spaceborne Integrated S/Ka Dual-Band Dual-Reflector Antenna
Zenan Yang, Weiqiang Han, Liang Tang, Haihua Wang, Yilin Wang, Yongchang Jiao
TL;DR
This paper introduces a dual-band satellite antenna that efficiently supports both low and high data rate communications using innovative design techniques.
Contribution
The novel use of a frequency-selective surface sub-reflector and miniaturized radiating elements enables efficient dual-band operation in a compact satellite antenna.
Findings
The S-band channels achieved gains exceeding 20.2 dBic with beamwidths over 6°.
The Ka-band channel achieved gains over 41.2 dBic with beamwidths greater than 0.8°.
The design effectively reduces aperture blockage and improves mechanical layout feasibility.
Abstract
To address the diverse requirements of satellite communication applications involving medium-/low-rate reliable links and high-rate high-capacity services, an integrated S/Ka dual-band dual-reflector antenna is proposed as an effective solution. Owing to the stringent spatial constraints of satellite platforms, the longer operating wavelengths in the S-band lead to oversized feed horns in the integrated antenna design, which induces severe secondary aperture blockage, thus degrading aperture efficiency and impeding practical mechanical layout implementation. To alleviate this critical drawback, the proposed antenna achieves multi-band aperture reuse by deploying an array with four miniaturized S-band radiating elements around a broadband Ka-band feed horn. A frequency-selective surface (FSS)-based sub-reflector is further designed to effectively enhance the effective aperture size for…
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Taxonomy
TopicsAdvanced Antenna and Metasurface Technologies · Satellite Communication Systems · Antenna Design and Optimization