Wide-beam circularly polarized microstrip antenna loaded with parasitic rings

Abstract

The invention discloses a wide-beam circularly-polarized microstrip antenna loaded with a parasitic ring. The wide-beam circularly-polarized microstrip antenna loaded with the parasitic ring comprises an upper substrate and a lower substrate, wherein fixed columns are arranged between the upper substrate and the lower substrate; a main radiating unit is arranged on the upper surface of the lower substrate; the upper surface of the upper substrate is provided with a parasitic ring patch unit; the bottom surface of the lower substrate is provided with floor; an excitation port is arranged between the main radiating unit and the floor; and the main radiating unit consists of a round patch and a pair of rectangular outer edge protuberances located on the diameter of the round patch. While keeping the good radiation performance of a planar microstrip circularly-polarized antenna, the wide-beam circularly-polarized microstrip antenna loaded with the parasitic ring can simultaneously broaden the lobe width of a perpendicular plane effectively so as to improve low-elevation gain and be convenient to debug; and compared with an existing wide-beam circularly-polarized antenna, the wide-beam circularly-polarized microstrip antenna loaded with the parasitic ring is simpler in structure, smaller in size and lower in weight, therefore, the production cost is lowered and the wide-beam circularly-polarized microstrip antenna is applicable for various small terminal equipment.

Description

technical field [0001] The invention relates to a circularly polarized satellite positioning and navigation antenna, in particular to a wide-beam circularly polarized microstrip antenna loaded with a parasitic circular ring. Background technique [0002] At present, global satellite positioning and navigation has become a rapidly developing industry. The service scope of the Beidou navigation system established by China is expected to cover the whole world in the next ten years. play a vital role. [0003] According to the working principle of the satellite navigation system, among the signals on the vertical plane, the low-elevation-angle signal close to the ground contributes the most to the positioning accuracy of the system. Although the zenith signal is easy to transmit and receive, it has little effect on positioning. In this way, in order to improve the positioning accuracy of the system, circularly polarized antennas are generally required to have higher low-elevati...

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Problems solved by technology

[0007] The purpose of the present invention is to overcome the shortcoming and deficiency of above-mentioned prior art, provide the wide-beam circularly polarized microstrip antenna that loads parasitic circular ring; Overcome traditional circularly polarized antenna's narrow vertical plane lobe width, the direction diagram is difficult to adjust question

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