High-performance multi-mode active satellite navigation antenna

Abstract

The invention discloses a high-performance multi-mode active satellite navigation antenna. The high-performance multi-mode active satellite navigation antenna comprises a surface-wave-restraining antenna, a dual-frequency-band orthogonal feed network, feed probes, short-circuit probes, a broadband low-noise amplifier and plastic screws, wherein the surface-wave-restraining antenna structurally comprises a capacitance board, a first dielectric substrate, a surface-wave-restraining patch, a second dielectric substrate and a base plate in sequence from top to bottom, a compensation air layer is arranged between the second dielectric substrate and the base plate, the surface-wave-restraining patch carries out coupling feed through the capacitance board, and is composed of a round patch and an annular patch, the broadband low-noise amplifier is arranged at below the dielectric substrates, an input port of the broadband low-noise amplifier is connected with an output port of the dual-frequency-band orthogonal feed network through a coaxial cable, and the surface-wave-restraining antenna and the dual-frequency-band orthogonal feed network are fixed through the plastic screws. The high-performance multi-mode active satellite navigation antenna has the advantages of being good in multi-path interference resistance capacity, high in gain, good in circular polarization performance and particularly applicable to a high-precision satellite positioning navigation and timing system.

Description

Technical field [0001] The invention relates to a high-performance multi-mode satellite navigation active antenna, in particular to an active antenna used in a high-precision, anti-multipath interference satellite positioning navigation and timing system. Background technique [0002] The global satellite navigation system uses satellites to provide high-quality positioning, navigation and timing services to global users. Since satellite navigation systems are not only important in the economic field, but also have an irreplaceable role in national defense, so long as powerful countries want to establish independent satellite navigation systems. The current satellite navigation systems include the US GPS (Global Positioning System) global satellite navigation system, Russia’s GLONASS (GLObal NAvigation Satellite System) global satellite navigation system and China’s Beidou-1 regional satellite navigation system. The US GPS is the application The most extensive and successful, it...

AI Technical Summary

Problems solved by technology

At present, satellite navigation terminal antennas are mostly passive antennas, which are not suitable for special occasions such as ships. This is because the satellite navigation receivers used on ships are generally installed in the cabin, and the antennas are fixed on the mast. The distance between them is very long, up to tens of meters, and the feeder line connecting them is very long

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