Double-layer transmission array antenna based on Jerusalem cross and its realization method

Abstract

The invention provides a double-layer transmission array antenna based on the Jerusalem cross and its implementation method. The double-layer transmission array antenna includes a feed source and a transmission array composed of a substrate and two metal layers arranged on the upper and lower surfaces of the substrate; the two metal layers The structure is the same, and each metal layer includes a plurality of Jerusalem cross units arranged periodically; the substrate and its upper and lower corresponding Jerusalem cross units with the same structure constitute the transmission array unit of the transmission array; the Jerusalem cross unit consists of four main branches A cross-shaped metal branch, each main branch is formed with a first branch perpendicular to the main branch, and each main branch is provided with metallized through holes for connecting the cross-shaped metal branches on the upper and lower surfaces of the substrate, Jerusalem The cross unit is a rotationally symmetrical structure. The double-layer transmission array antenna of the present invention has the advantages of simple structure, low cost, high gain, and high aperture efficiency, and can meet the high-performance communication requirements in the millimeter wave frequency band.

Description

technical field [0001] The invention relates to antenna technology in a wireless communication system, in particular to a double-layer transmission array antenna based on a Jerusalem cross and a realization method thereof. Background technique [0002] With the rapid development of mobile communication technology, traditional low-frequency spectrum resources have become very crowded. The current fifth-generation communication technology (5G) and next-generation communication technology are evolving towards higher frequencies and larger bandwidths. However, as the frequency increases, the transmission attenuation of the signal in the atmosphere also increases significantly. Therefore, in order to achieve long-distance directional radiation in the millimeter-wave frequency band, a high-gain requirement is imposed on the front-end of the radio frequency—the antenna. At present, the common forms of high-gain antennas mainly include reflectarray antennas, transmissive array anten...

AI Technical Summary

Problems solved by technology

[0004] However, the existing multilayer frequency-selective surface-type transmission unit is composed of multilayer dielectric substrates, which has the problem of large dielectric loss, which ultimately results in low efficiency of the transmission array antenna; at the same time, the multilayer PCB will also increase the processing cost and increase the cost of the transmission array. Section height

For the receiving-reradiation type transmission unit, it is also composed of multi-layer dielectric substrates, and the structure of this type of unit is relatively complicated; due to the insertion loss and high Q value introduced by the addition of lumped elements, this type of transmission array antenna is also There are disadvantages of low efficiency

In addition, the large number of lumped elements can result in expensive tooling

[0005] Through the review and analysis of the above existing technologies, the current mainstream transmission array antennas have the defects of high processing cost and low efficiency.

In addition, the existing millimeter-wave transmission array antenna still has the problems of high profile and low aperture efficiency, which makes it difficult to better meet the high-quality communication requirements of millimeter-wave frequency bands for high-gain application scenarios

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