A New Satellite Antenna Concept Using Reflectarray Antennas

In this paper, a new satellite antenna concept involving a Tx and an Rx reflectarray antenna is proposed. Each antenna is composed of multiple horns and a single-layer flat reflectarray. It radiates scanning beams with different radiation directions in the azimuth due to polarization. Each scanning beam has a different radiation direction depending on the frequency and covers an elongated area in elevation. Each user in the service area selects the optimum frequency band, and the polarization is determined by the position of the user. If a 3 dB gain reduction is allowed, half of the frequency band can be used, similar to the conventional multiple-spot beam antenna.