A Dual Band Resonant-Cavity Antenna for Satellite Communication

This paper demonstrates design of a dual-band resonant-cavity antenna (RCA) for satellite applications. The antenna can be used as base antenna for near-field meta-steering technology aimed at providing connectivity using low-earth-orbit satellite services. The notable feature of the presented RCA includes its planar profile and use of thin partially reflecting surface (PRS) for gain enhancement that can be designed for the antennas operating at any two frequencies within two operating bands. The design example presented here operates at 20 GHz and 27 GHz, where RCA peak directivity is 14 dB and 17 dB. The directivity can be increased by either using larger aperture or arraying copies of the proposed RCA.