Antenna calibration network unit, antenna calibration network and mimo antenna

Abstract

The present invention provides an antenna calibration network unit, an antenna calibration network, and a MIMO antenna. The antenna calibration network unit includes a substrate, a plurality of directional coupler groups arranged on the substrate, and a set of directional coupler groups arranged at the front end of the directional coupler group. A multi-stage combiner network; the parallel coupling lines of each of the directional couplers are arranged along the horizontal direction, and the multiple groups of directional couplers are arranged along the horizontal direction; the multi-stage combiner network includes a first-stage combiner and a secondary combiner, the primary combiner is arranged on one side of the multiple sets of directional coupler groups; the secondary combiner is cascaded with the primary combiner, and each of the The secondary combiner crosses from between the two sets of directional coupler sets corresponding to the two primary combiners to the other side of the multiple sets of directional coupler sets. By using the above-mentioned antenna calibration network unit, the space utilization rate of the calibration network board can be improved, the size of the calibration network board can be reduced, and the cost of the antenna can be reduced.

Description

【Technical field】 [0001] The invention relates to the technical field of communications, in particular to an antenna calibration network unit, an antenna calibration network and a MIMO antenna. 【Background technique】 [0002] With the application of large-scale array antennas and the gradual commercialization of next-generation mobile communication technologies, compared with traditional 4G antennas, 5G antennas have more ports and denser site layout, which imposes stricter requirements on the cost of antennas. Multiple-Input Multiple-Output (MIMO) technology has attracted great attention as an important means to improve the data transmission rate, and MIMO technology is considered to be one of the key candidate technologies for the new generation of communication (5G) technology. [0003] The MIMO array antenna is mainly composed of antenna oscillators, feed network boards, and calibration network boards. The calibration network board uses four-layer laminated multi-layer b...

AI Technical Summary

Problems solved by technology

[0004] like figure 1 As shown, the calibration network is generally composed of a line composed of a directional coupler 101 and a multi-stage combiner 102 cascaded. The lines of the directional coupler 101 and the multi-stage combiner 102 on the traditional calibration network board are arranged vertically. The lines are relatively scattered in space, the utilization rate of the calibration network board is low, and the cost is high

Images