Planar compact slot antenna array based on substrate integrated waveguide resonant cavity

Abstract

The invention discloses a planar compact slot antenna array based on a substrate integrated waveguide resonant cavity. The planar compact slot antenna array is composed of four equilaterally triangular back cavity unit antennas. As for the equilaterally triangular back cavity unit antennas, the central area of the upper surface of an equilaterally triangular substrate integrated waveguide resonant cavity is slotted, and feeding is performed by the grounded coplanar waveguide on the lower surface of a dielectric plate. The triangular substrate integrated waveguide resonant cavity is realized in a way that three rows of metal through holes which are connected in an end-to-end way are punched on the medium of which the upper and lower surfaces are metallic. When the working mode of the resonant cavity is TE<120>, the most dramatically changed area of the electric field is the center of the cavity so that the rectangular slots are punched at the center of the triangular cavity, displacement current is generated on the slots and electromagnetic waves are enabled to be radiated out. Compared with the rectangular or circular resonant cavity, the equilaterally triangular resonant cavity has the advantages of convenient layout and compact structure and has higher radiation efficiency under the condition of the same area and working mode.

Description

technical field [0001] The invention relates to a planar compact slot antenna array based on a substrate integrated waveguide resonant cavity, which belongs to the field of microwave technology. Background technique [0002] With the rapid development and application of modern communication technology, higher requirements are put forward for the miniaturization, integration and high performance of the communication system. The antenna is a very important part of the communication system, and its performance will directly affect the performance of the entire system. Traditional cavity-backed slot antennas have the disadvantages of large volume, complex structure, and high cost. Therefore, it is necessary to design a low-profile, high-gain slot antenna that is light in weight, low in cost, and easy to integrate with planar circuits. [0003] In order to reduce the size of the antenna, reduce the processing cost, and improve the radiation efficiency of the antenna, a planar sl...

AI Technical Summary

Problems solved by technology

Traditional cavity-backed slot antennas have the disadvantages of large volume, complex structure, and high cost. Therefore, it is necessary to design a low-profile, high-gain slot antenna that is light in weight, low in cost, and easy to integrate with planar circuits.

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