High gain circularly polarized resonance cavity antenna at X-band

Abstract

In this paper, a high gain and circularly polarized (CP) resonance cavity antenna (RCA) is proposed at X-band. An aperture coupled microstrip antenna (ACMA) is used as the basic antenna and a frequency selective surface, consisting of an array of circular patches is used as superstrate. The proposed RCA provides a gain enhancement upto 12 dB compared to the microstip patch at 8.2 GHz. A detailed design of the RCA is explained in this paper. Final gain of the antenna is 20.5 dBic, and axial ratio band width (AR < 3dB) of 200 MHz. This high gain CP antenna can be used for payload data transmission system of remote sensing satellites at X-band.