Multimodal satellite navigation terminal antennae with wide-band circular polarized wide wave beam

Abstract

The invention discloses a multimode satellite navigation terminal antenna with broadband and circular polarization wide-beam, which is applied in places with higher demands on the properties of the broadband and the circular polarization. The multimode satellite navigation terminal antenna is composed of an antenna body and a feed network, wherein, the antenna body consists of a radome (1), a media support, a metallic radiating patch (2), four L-shaped metallic feed probes (3) and a metallic reflecting plate (4); the feed network consists of a four-way microstrip power-dividing phase shift network (5) and a metallic shielding box; the four L-shaped metallic feed probes (3) of the antenna body are electrically connected with the microstrip power-dividing phase shift network (5) of the feed network by metals. The multimode satellite navigation terminal antenna with broadband and circular polarization wide-beam leads the relative bandwidth of the microstrip antenna to reach a point above 40 percent. Meanwhile, since the microstrip antenna with nested media is adopted, the low-elevation gain of the microstrip antenna is greatly improved. With a 5-degree elevation angle gain larger than -5dBi, the multimode satellite navigation terminal antenna with broadband and circular polarization wide-beam is also provided with excellent mechanical characteristics and temperature characteristics.

Description

technical field [0001] The invention relates to antenna technology in the field of wireless communication, in particular to occasions such as multi-mode satellite navigation terminals and the like that have high requirements on broadband characteristics and circular polarization characteristics. Background technique [0002] Usually satellite navigation antenna terminal (user) antennas are single-frequency, dual-frequency or triple-frequency, and they are all aimed at a single satellite navigation system, such as foreign GPS, GLONASS, GALILEO and my country's Beidou-1 and Beidou-2. The disadvantage of this type of antenna is that it cannot receive all navigation signals at the same time, and cannot meet the needs of multi-mode navigation reception. However, in practical applications, users need to select one or more navigation signals of the above-mentioned different satellite navigation systems according to actual needs, and need a broadband multi-mode navigation terminal a...

AI Technical Summary

Problems solved by technology

Because the copper foil is very thin (usually 17 microns or 35 microns), the copper foil is easy to peel off under the conditions of rapid temperature fusion and a wide range of changes, resulting in damage to the antenna

Moreover, the microstrip antenna realized by the printing process is generally very thin, and it is difficult to achieve a good low elevation gain

[0006] In summary, there are no relevant literature reports on broadband multi-mode navigation terminal antennas that can simultaneously receive multiple modes of navigation signals

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