Calibration Method of Spaceborne Multi-beam Antenna Transmission Channel Without Service Interruption

Abstract

The invention discloses a satellite-born multi-beam antenna emission channel calibration system with no service interrupted, and belongs to the technical field of radar antenna measurement. Accordingto the invention, the system overlaps an ultra-low power calibration signal and a normal communication service signal, processes the signal through an upconverter and a power amplifier and the like modules, and radiates the signal through an emitting antenna array, a receiving end extracts the amplitude phase error coefficients of respective emitting channels through a parallel correlator, obtainsan amplitude calibration factor and a phase calibration factor that have higher precision, an adjustment apparatus adjusts the amplitudes and the phases of the respective emitting channels based on the amplitude calibration factor and the phase calibration factor, thus calibrating the satellite-born multi-beam antenna emitting channel with no service interrupted. According to the invention, the system herein can achieve calibration with higher precision with no service interrupted, does not take up extra frequency spectrum resources, and can ensure communication quality.

Description

technical field [0001] The invention relates to a space-borne multi-beam antenna transmission channel calibration system with uninterrupted services, and belongs to the technical field of radar antenna measurement. Background technique [0002] Spaceborne multi-beam antennas can greatly improve satellite communication capacity and coverage, and are widely used in modern satellite communication systems. Due to the particularity of the satellite communication environment, the active electronic devices on the satellite are affected by factors such as temperature drift and device aging, resulting in amplitude and phase errors, resulting in the degradation of key performances such as beam pointing, main lobe gain and side lobe level. Measuring and compensating amplitude and phase errors in real time has important practical significance for spaceborne multi-beam antenna systems. [0003] The premise of accurate and real-time calibration is to solve the problem of mutual interfere...

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the space-borne multi-beam antenna calibration occupies spectrum resources and interrupts the normal communication service flow, and proposes a space-borne multi-beam antenna transmission channel calibration system with uninterrupted business, which combines the ultra-low power calibration signal with the normal communication The business signals are superimposed and radiated through the transmitting antenna array after passing through the up-converter, power amplifier and other modules. The strong interference of the ultra-low power calibration signal can obtain higher precision amplitude and phase calibration factors, and the adjustment device adjusts the amplitude and phase of the transmitting channel according to the amplitude and phase calibration factors

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