1. Smart Antennas for Space-borne Synthetic Aperture Radars
- Author
-
Chun-Xu Mao, Steven Gao, Zhengpeng Wang, Anton Patyuchenko, Fan Qin, Gerhard Krieger, and Marwan Younis
- Subjects
Synthetic aperture radar ,DIFFERENT ,Smart antenna ,digital beamforming ,Optics ,General Materials Science ,Antenna feed ,Remote sensing ,Physics ,Directional antenna ,business.industry ,Reflective array antenna ,Antenna aperture ,Astrophysics::Instrumentation and Methods for Astrophysics ,dual-pol ,Side looking airborne radar ,General Chemistry ,highly integrated ,Ka-band ,dual-band ,X-band ,Antenna (radio) ,business ,smart antennas ,radar ,SAR ,reflector - Abstract
This paper discusses smart antennas for space-borne synthetic aperture radar (SAR). First, some recent development in smart antennas for space-borne SAR is reviewed. Then, the paper presents a low-cost space-borne SAR system using digital beam forming on receive. The smart antenna system is also discussed, and some results are shown. The antenna system, consisting of a parabolic reflector and multi-feed array, is designed and optimized for dual-band dual-polarized digital beam-forming performance. The operating frequencies are at X and Ka bands with the center frequency of 9.6 and 35.75 GHz, respectively. The stacked dipoles and square patches with parasitic elements are employed as the feed elements at X and Ka bands. Dual-band antenna arrays are combined in the same aperture, which not only reduce the aperture of the feed array, but also coincide the center of dual-band feed arrays.
- Published
- 2014