C-band planar MIMO antenna based on interdigital coupling structure

Abstract

A C-band planar MIMO antenna based on an interdigital coupling structure comprises a rectangular dielectric substrate. A metal grounding plate is arranged on a lower surface of the rectangular dielectric substrate. The dielectric substrate is provided with two antenna units which are in mirror symmetry state. Each antenna unit comprises a feed metal arm arranged on the upper surface of the dielectric substrate. A tail end of the feed metal arm is connected with a horizontal metal arm. The tail end of the horizontal metal arm is connected with the interdigital coupling structure. The interdigital coupling structure is composed of an even number of vertical metal arms and two horizontal metal arms which are distributed at equal intervals. The odd number of vertical metal arms are connected with the upper horizontal metal arm, the even number of vertical metal arms are connected with the lower horizontal metal arm, another horizontal metal arm and the vertical metal arm are arranged on alower surface of the dielectric substrate, the horizontal metal arms are connected with the interdigital coupling structure through metal via holes, and the vertical metal arms are connected with themetal grounding plate. In the invention, high isolation exists between ports of the two antenna units, and a working frequency band of each antenna unit is relatively wide.

Description

technical field [0001] The invention belongs to the field of wireless communication, and in particular relates to a C-band planar MIMO antenna based on a cross-toe coupling structure. Background technique [0002] Since the 1980s, wireless communication systems have developed rapidly, from the simple voice system undertaken by the initial (1G) system to the current advanced mobile broadband multimedia system (4G). With the rapid development of the global Internet and mobile communications, the popularity of mobile devices such as smartphones and tablet computers has led to a sharp increase in the number of data traffic and mobile device connections. It is estimated that by 2025, global data traffic will reach the current 200-fold increase. Mobile terminals The number will exceed 10 billion units. In the face of the explosive development of information and data, communication technology can no longer meet the needs of merely changing human life, but will further change human...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a C-band planar MIMO antenna based on a co-toe coupling structure for the problem of insufficient operating frequency bandwidth of the planar MIMO antenna in the prior art, which includes two antenna units with symmetrical structures and two antenna unit ports. There is high isolation between them, and the working frequency band of each antenna element is wide

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