An Alternative Feed Design for the MRO Antenna

W.A. Imbriale
2005 IEEE Antennas and Propagation Society International Symposium  
NASA's Mars Reconnaissance Orbiter (MRO) [1], scheduled for launch in 2005, will study the history of water on Mars. The current feed design for the 3-meter reflector antenna uses a dielectrically supported disk-on-rod Kaband (32 GHz) feed in the center of an X-band (7.2, 8.4 GHz) corrugated horn. As a potential backup design in case of problems, an alternate feed design for the MRO antenna that does not use any dielectric materials or a disc-on-rod was developed. The design uses a Ka-band
more » ... uses a Ka-band Potter Horn in the center of the current Xband MRO corrugated horn. Using the same High-gain reflector assembly, the new feed provides virtually the same X-band gain (within 0.1 db) and more than 1 dB improvement at Ka-band.
doi:10.1109/aps.2005.1552367 fatcat:zqq6vobbmfarznwn6uyd5a6rxi