Low-multipath measuring type antenna

Abstract

The invention discloses a low-multipath measuring type antenna comprising a PCB plate and two pasters arranged on the PCB plate; the two pasters comprise an upper radiation paster and a lower paster, wherein the upper radiation paster is connected with the lower paster through a medium layer; an edge of the PCB plate is bonded with an absorbing material; a shield is also connected below the PCB plate; the antenna also comprises a plurality of feed probes and fixed probes penetrating the medium layer; the fixed probes are arranged in the center of the feed probes. The edge of the PCB plate is bonded with the high impedance absorbing material, so most surface waves are absorbed by the absorbing material and gradually converted into heat energy, thus reducing back lobe of the antenna, improving back and forth ratio, effectively reducing antenna multipath effect, and the antenna is small in size, light in weight, and excellent in communication performance.

Description

technical field [0001] The invention relates to the field of satellite antennas, in particular to a low multipath measurement antenna. Background technique [0002] Multipath effect is the main source of error in the application of global satellite navigation systems, especially high-precision applications in geodesy. The phenomenon of reflection and scattering occurs, and some reflected and scattered signals will be received by the receiver antenna together with the direct signal. These reflected and scattered signals entering the receiver antenna are equivalent to the direct signal with an extended propagation path, which is called a multipath signal. Compared with the direct signal, the phase lag of the multipath signal, the amplitude may attenuate or increase, which will cause the change of the carrier-to-noise ratio of the receiver, reduce the ranging accuracy of the receiver, and improve the anti-multipath ability of the receiver from two aspects of hardware and algori...

AI Technical Summary

Problems solved by technology

[0005] In view of the deficiencies in the prior art above, the purpose of the present invention is to provide a low multipath measurement antenna, aiming at solving the problem that the antenna volume is too large in the prior art to suppress the multipath effect, or the antenna with a small volume has multiple The problem of poor path suppression ability

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