Attenuation ratio of Ka-band to Ku-band satellite signals and correlation with cross-polar phase on satellite-to-ground path

As the demand for channel capacity of satellite communications increases, higher frequencies such as the Ku- (14/12 GHz) and Ka- (30/20 GHz) bands have been used. In this study, rain attenuation characteristics of Ku- and Ka-band satellite signals are compared, and correlation with phase of the cross-polarization component is presented, using the long-term database for both signals which have been observed in our university for five years. The Ka-band satellite signal has been obtained from the CS-3 (Sakura) beacon signal (19.45 GHz, RHCP, elevation=49.5/spl deg/) during the satellite communication experiments of Japan´s CS-3 Pilot Program. The Ku-band satellite signal has been obtained from Japan´s Broadcasting Satellite (BS, Yuri), and the level of carrier radiowave for a specific channel (11.84 GHz, RHCP, elevation=41.4/spl deg/) has been measured by a BS tuner, which is commercially obtainable. Also, the cross-polar phase of the Ka-band signal (19.45 GHz) is evaluated by the output of the phase-amplitude demodulator of the CS-3 beacon signal.<>