Differential slot mimo antenna with high common-mode rejection ratio

A technology with high common-mode rejection and gaps, applied to antennas, devices that enable antennas to work in different bands at the same time, and structural forms of radiating elements, can solve the problems of no suppression and achieve overcoming common-mode rejection and high common-mode rejection , the effect of reducing the size

Active Publication Date: 2018-01-16
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But compared with differential antennas, there is no suppression of common mode

Method used

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  • Differential slot mimo antenna with high common-mode rejection ratio
  • Differential slot mimo antenna with high common-mode rejection ratio
  • Differential slot mimo antenna with high common-mode rejection ratio

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Such as figure 1 with figure 2 As shown, the antenna unit of this embodiment includes a floor and a microstrip feeder 1, the floor is arranged on the top layer of the dielectric substrate 2, and a T-shaped slot 3 is etched, and the microstrip feeder 1 is arranged on the bottom layer of the dielectric substrate 2;

[0032] The microstrip feeder 1 has a concave structure, and the two ends of the concave structure are respectively a first feeding port Port1 and a second feeding port Port2, and the first feeding port Port1 and the second feeding port Port2 are located at At the same edge of the bottom layer of the dielectric substrate, from figure 2 It can be seen from the figure that, unlike the traditional differential feed, the first feed port Port1 and the second feed port Port2 of the differential feed in this embodiment are directly connected, and the first feed port Port1 and the second feed port The electrical port Port2 feeds in differential signals with the sa...

Embodiment 2

[0035] Such as Figure 4 with Figure 5 As shown, the MIMO antenna of the present embodiment includes four antenna units (the antenna units of the above-mentioned embodiment 1) and a dielectric substrate 2, wherein the dielectric substrate 2 adopts an FR4 dielectric substrate with a dielectric constant of 4.4 and a thickness of 0.8 mm; The three antenna units are the first antenna unit 4, the second antenna unit 5, the third antenna unit 6 and the fourth antenna unit 7. There are eight feeding ports in total. The floors of the four antenna units are connected and printed on the FR4 medium The top layer of the substrate; the microstrip feeder 1 of the four antenna units uses a 50Ω microstrip feeder and is printed on the bottom layer of the FR4 dielectric substrate, and uses the feed port to differentially feed the T-shaped slot 3 on the floor; the T of the four antenna units The rectangular slits 3 are arranged orthogonally to each other on the connected floor, and four rectan...

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Abstract

The invention discloses a differential slot MIMO antenna with a high common-mode rejection ratio, which includes a dielectric substrate and a plurality of antenna units, each antenna unit includes a floor and a microstrip feeder, the floor is arranged on the top layer of the dielectric substrate, and A T-shaped slot is etched, and the microstrip feeder is arranged on the bottom layer of the dielectric substrate, and the T-shaped slot is divided into an open slot and a short-circuit slot; the floors of the multiple antenna units are connected to cover the top layer of the dielectric substrate. The invention adopts a special differential feed structure and a combination of slots to achieve a high common-mode suppression effect, and has the advantages of miniaturization, simple structure, high common-mode rejection ratio, dual frequency bands and high isolation, etc., and can meet miniaturization, low The requirements of cost, ease of processing, and ease of integration with differential circuits can be widely used in WLAN systems.

Description

technical field [0001] The invention relates to a MIMO antenna, in particular to a differential slot MIMO antenna with a high common-mode rejection ratio, belonging to the field of wireless mobile communication. Background technique [0002] With the rapid development of wireless mobile communication in recent years, the resources for wireless mobile communication to increase the data transmission rate - frequency bandwidth and transmission power are on the verge of saturation. The rapid development of mobile communication has brought about the increasing shortage of spectrum resources. How to improve the transmission rate and quality of information on the existing spectrum resources has become the focus of research in today's society. MIMO (Multiple-Input Multiple-Output) wireless communication technology has entered people's field of vision because of its huge advantage of greatly increasing channel capacity and data transmission rate without losing frequency bandwidth and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q5/364H01Q5/20H01Q1/38
Inventor 柳炎炎涂治红褚庆昕
Owner SOUTH CHINA UNIV OF TECH
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