Planar slot array antenna

Abstract

The invention discloses a planar slot array antenna which is characterized in that the antenna comprises a feeding layer containing a feeding structure, a coupling layer containing a coupling port and a coupling cavity, and a radiating layer, which are arranged in sequence from bottom to top; the feeding layer adopts an E-plane waveguide, the E-plane waveguide is coupled to the upper coupling layer via an aperture by a T-type equal-amplitude in-phase power divider, the coupling cavity is arranged above the coupling port of the coupling layer, and a one-four power divider is formed; and a radiating slot array composed of multiple radiating slot units is arranged in the radiating layer, and steps are arranged in positions corresponding to the radiating slot units in the coupling cavity. The planar slot array antenna is simple in structure, has the characteristics of high bandwidth and low loss, and is superior to products of the same type in performance.

Description

technical field [0001] The invention relates to the technical field of antennas, in particular to a flat panel array antenna. Background technique [0002] With the rapid development of antenna technology and the comprehensive popularization of the information society, in 2020 and in the future, mobile communication technology will enter the development stage of the fifth generation mobile communication (5G). It is characterized by 0.1-1Gbps experience rate, several 10Tbps / km 2 Traffic density, million-level connection density, low power consumption, etc. The basic requirements of the 5G network for the antenna technology field are mainly high bandwidth and low loss, while the application aspects are millimeter wave planar array (mmWave planar array), multi-unit (massive MIMO), beam forming (beam forming), beam scanning (beam scanning) steering), multi-beam and active integrated phased array (phase control array). Among them, the millimeter-wave flat panel array plays a v...

AI Technical Summary

Problems solved by technology

However, the bandwidth of traditional air waveguides is not wide enough, and it is difficult to meet the high-bandwidth requirements of 5G high-frequency bands. At present, the relative bandwidth of products is generally 10%-15%, and the return loss within its bandwidth is also high, and the standing wave ratio is around 2.0. , while some products sacrifice return loss in order to achieve 20% relative bandwidth, the VSWR is as high as 2.6, and a large part of the input energy is reflected

In addition, the traditional air waveguide processing method also has disadvantages: gap leakage (high metal contact requirements)

An emerging multi-layer metal sheet silver-plated lamination technology has largely solved the problem of gap leakage, but the processing cost is extremely high and it is not suitable for mass production

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