Millimeter wave circularly polarized one-dimensional sum-difference vehicle-mounted communication antenna

Abstract

The invention relates to a millimeter wave circularly polarized one-dimensional sum-difference vehicle-mounted communication antenna, belonging to the technical field of antennas. The antenna comprises a planar sum-difference network, coupled-fed slots, waveguide slots, metal walls, a microstrip slot surface, rigid support foam, a microstrip circularly polarized gate and a metal sheet, wherein a sum port and a difference port of the planar sum-difference network are ports connected with the outside; the waveguide slots are formed on the back of the planar sum-difference network; the waveguide slots and the planar sum-difference network are connected by the coupled-fed slots; the metal walls are positioned at the two sides of the waveguide slots; the planar sum-difference network, the coupled-fed slots, the waveguide slots and the metal walls integrally serve as an antenna back sheet; the metal sheet is positioned on the reverse side of the antenna back sheet and covers the planar sum-difference network; the microstrip slot surface is bonded with the waveguide slots by conductive adhesives; the rigid support foam is positioned between the metal walls, is fixed on the metal walls and covers the microstrip slot surface; and the microstrip circularly polarized gate is pasted on the upper surface of the rigid support foam. The antenna has the following beneficial effects: the defects of high processing cost, low yield, small work bandwidth and long processing period of metal waveguide slot arrays and the defect of low gain of microstrip patch array antennas are overcome.

Description

technical field [0001] The invention relates to a millimeter-wave circularly polarized one-dimensional and differential vehicle communication antenna, which belongs to the technical field of antennas. Background technique [0002] With the rapid development of mobile satellite communication technology and car navigation systems, vehicle-mounted smart antenna systems have been used more and more. A good-performance vehicle-mounted smart antenna communication and positioning system has high requirements for antennas. [0003] The metal waveguide slot antenna is an antenna that is easy to achieve narrow beam, high gain, and low sidelobe. It has the advantages of low profile, easy integration, and small size. antenna. The traditional metal waveguide slot antenna array generally adopts the form of a wide-side standing wave slot array, but it has the disadvantages of difficult processing, low yield, high processing cost, and narrow working bandwidth. The microstrip patch array a...

AI Technical Summary

Problems solved by technology

The traditional metal waveguide slot antenna array generally adopts the form of wide-side standing wave slot array, but it has the disadvantages of difficult processing, low yield, high processing cost, and narrow working bandwidth.

The microstrip patch array antenna is also an array antenna form with the advantages of planar type, easy integration, and small size, but its radiation efficiency is low, resulting in low gain

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