Design and Implementation of a Multiband Common Aperture TT C and Data Receiving Integrated Antenna System

For the requirements of high-quality reception and overhead tracking in the C/X/Ka band satellite signals by civil aeronautics TT&C and Data Receiving Integrated ground satellite station，a multiband common aperture TT&C，and Data Receiving Integrated antenna system has been developed which solves the technical problems of high efficiency transmit-receive shared，tracking in the whole airspace for the C/X/Ka band LEO satellite signals ，and a large Passing Zenith Tracking Errors in antenna systems. The following key techniques are proposed in the development phases: High-precision antenna frequency continuous handover technology based on Mechanical Self-locking device，Servo control technology based on multi-information fusionl. We have developed a triaxial 7.3-meter C/X/Ka band reflector antenna prototypes based on the electric frequency continuous handover system，completed the relevant performance，realized the high-precision automatic tracking of C/X/Ka band LEO satellite signals.The on-site test results show the prototypes the receive antenna Gain，the first sidelobe，Difference beam nulling depth，poining accuracy，and tracking accuracy can meet the design specification，The X-band tracking accuracy can reach 0.0338 ° and is better than 1/10 times the half-power beam width and The Ka-band tracking accuracy can reach 0.0128 ° and is better than 1/10 times the half-power beam width.The scheme may be important reference significance to development muti-frequency TT&C antenna system.