Abstract
A planar broadband circularly polarized (CP) X-band array antenna with low sidelobe and high aperture efficiency is presented for small satellite applications. The array design is composed of 4 × 4 broadband CP stacked patch elements, which are fed by a feeding network consisted of unequal series-parallel power dividers to achieve the low sidelobe and high aperture efficiency. The final prototype with overall size of 100 mm × 100 mm × 3 mm (2.73λ0 × 2.73λ0 × 0.082λ0 at 8.2 GHz) was fabricated and measured. The antenna has a broadband characteristic with |S11| < −10 dB bandwidth of 15.9% (7.52-8.82 GHz) and 3-dB axial ratio bandwidth of 11.95% (7.63-8.60 GHz). Also, it achieves an excellent broadside CP radiation with a gain of 17.2-20.03 dBic, a sidelobe level of <−20 dB, and aperture efficiency of 65% to 97.5%. With these features, the proposed antenna is a good candidate for high-speed data downlink onboard small satellites (MiniSat, MicroSat, NanoSat, and CubeSat).
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: International Journal of RF and Microwave Computer-Aided Engineering
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
