Abstract :
Starting from the geometrical parameters of the feed and the desired gain of the Cassegrain antenna, a method to determine the design starting parameters for a high-power offset Cassegrain antennas is discussed. Then, by numerically solving the equations governing the antenna geometry, a set of design curves are obtained, with which the structure of the antenna can be determined by trading off the electrical and geometrical system requirements. The method presented can be applied to both high or low gain feeds for constructing a high power microwave electromagnetic environment, where complex electronic systems can be tested. For linearly polarized feeds with high gain, the structure parameters of antenna with zero cross polarization can be obtained, which is equal to the design results of Brown and Prata (see IEEE Trans. Antennas Propagat., vol.42, no.8, p.1145-53, 1994)
Keywords :
electromagnetic wave polarisation; microwave antennas; offset reflector antennas; reflector antenna feeds; antenna design; antenna feed; antenna gain; antenna geometry; design curves; design parameters; electrical system requirements; electronic systems; geometrical parameters; geometrical system requirements; high gain feeds; high power microwave electromagnetic environment; high-power offset Cassegrain antennas; linearly polarized feeds; low gain feeds; structure parameters; zero cross polarization; Antenna feeds; Antennas and propagation; Design methodology; Electromagnetic propagation; Electromagnetic wave polarization; Electronic equipment testing; Equations; Geometry; Microwave theory and techniques; System testing;
