Single feedback low profile back cavity dual-frequency bilinear polarization antenna

Abstract

The invention relates to a single-fed, low-contour, cavity-backed, and double-frequency bilinear polarized antenna. The single radiation unit on the traditional double-frequency antennas is poor in performance; and the prior double-frequency and cavity-backed antenna has the disadvantages of large bulk, complex structure and high manufacturing cost. The invention is characterized in that the substrate is plated with metallic layers on two sides, wherein, the upper metallic layer is etched with a microstrip line for feeding and a plurality of grounded coplanar wave guiding transmission lines, wherein, the metallic strip in the middle is extended outwards to form the microstrip line. A plurality of metallized through holes, which are arrayed as a square, are penetrated through the upper metallic layer, the medium substrate and the lower metallic layer to form the cavity; the coplanar wave guiding transmission lines are extended into the cavity. Two orthogonal elongated radiation slits are etched on the lower metallic layer corresponding with the cavity. The invention has the advantages that: by adopting the general PCB technology, the production cost is notablely decreased and the invention can be integrated with the microstrip circuit without seam, the integrity of the system is improved; compared with the exact machining of the prior bilinear cavity-backed antennas, the manufacture speed is high and the cost is low.

Description

technical field [0001] The invention belongs to the field of microwave technology, and relates to a single-feed low-profile cavity-backed dual-frequency dual-linear polarization antenna based on substrate integrated waveguide technology, which can be used as a radio frequency transceiver front-end antenna and is widely used in mobile communications, satellite communications, Wireless communication systems such as radar, especially suitable for applications requiring high gain and multi-band operation. Background technique [0002] With the rapid development of communication technology, the requirements for antennas are getting higher and higher. Not only do antennas need to have high-performance radiation functions, but they also need to have characteristics such as low profile, light weight, low cost, integration and easy conformality. At this stage, more and more occasions require the antenna to have multi-band working characteristics, such as in synthetic aperture radar, ...

AI Technical Summary

Problems solved by technology

The most typical applications include multi-layer patch antennas with different patch shapes, this type of antenna is generally bulky and expensive to manufacture

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