Multi-frequency circularly polarized stacked micro-strip antenna

Abstract

The invention discloses a multi-frequency circularly polarized stacked micro-strip antenna, formed by stacking a plurality layers of metal sheets and medium plates arranged between every two metal sheets, wherein an inner conductor and an outer conductor which are coaxial are respectively connected with the upper layer of metal sheet and an earthing plate to feed electricity, and electromagnetic coupling between every two layers of metal sheets is used for feeding the electricity to the middle layer of metal sheet, thereby forming a plurality of circularly polarized micro-strip antennas; and parameters of the various layers of metal sheets and the medium plates are designed by the conventional design method of the micro-strip antenna, and various working frequencies of the antenna are relatively independent, so that combinations of any frequency points can be achieved; and radiation characteristics and resonance characteristics in the various frequency bands are respectively determined by the upper layer of metal sheet and the medium board on the corresponding positions. The multi-frequency circularly polarized stacked micro-strip antenna disclosed by the invention has the advantages of being simple and compact in structure, low in cost and easy in implementation; satellite signals in the various frequency bands can be received just by a single-port feed interface without a power divider, a coupler, a phase-shift network or other circuits, so that the emitting and receiving circuits are simple; and the multi-frequency circularly polarized stacked micro-strip antenna additionally has the advantages of small size, great beam width and the like.

Description

technical field [0001] The invention relates to a passive microwave transmission device, in particular to a multi-frequency circular polarization laminated microstrip antenna, which belongs to the technical field of microwave transmission. Background technique [0002] In recent years, the L1 (1575.42MHz), L2 (1227.6MHz) and L5 (1176.45MHz) frequency bands of GPS have been gradually opened up, and the China Beidou Satellite Navigation System (CNSS) is also in the process of maturing. The uplink L frequency band of the currently open Beidou satellite navigation system is 1610~1626.5MHz, and the downlink S frequency band is 2483.5~2500MHz. With the increase of demand for satellite navigation and positioning, satellite positioning and navigation systems may need to work in multiple frequency bands, and because the two systems of GPS and CNSS need to work compatible, in order to be able to realize the complementary advantages and disadvantages of the two navigation systems, so t...

AI Technical Summary

Problems solved by technology

[0004] However, the existing microstrip antennas have the following defects: or they cannot achieve multi-frequency characteristics, or although they can work at multiple frequency points, they need multiple feed interfaces; thus, corresponding couplers or phase shifters are required Network and other circuits make the structure of the antenna complex, which is not conducive to miniaturization and miniaturization

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