Design and Implementation of Cassegrain Antenna with 37dB Gain in Millimeter Wave Spectrum

Millimeter wave systems have a wide frequency band. Reflector antennas are a good choice for use in these systems, due to the broad frequency coverage, high efficiency and gain. In the present paper parabolic reflector antenna characteristics and their design principles have been provided. For this purpose, first geometry of the parabolic reflector is inspected, and then design process of Cassegrain antenna and its feed have been discussed. Based on it, the design of a Cassegrain antenna has been done with its feed. Due to the high sensitivity of Cassegrain reflector to the placing of phase center of the feedhorn antenna at focusing point of the reflector, it has been tried to obtain equal phase centers at E and H-planes. After the simulation of antenna by CST MWS, the gain of the antenna is obtained 37.27dB. In the current study a broadband Cassegrain system designed and implemented by using designed feed antenna that operate well in 30-40GHz.