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Small differential notch UWB-MIMO antenna

A wave trap and antenna technology, applied in the field of wireless mobile communication, can solve the problems of reducing system efficiency, increasing the number of independent devices, not conducive to high integration and miniaturization of the system, and achieving good impedance matching, reducing size, and increasing isolation. Effect

Active Publication Date: 2016-05-11
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use of balun will cause loss, reduce system efficiency, and increase the number of independent devices, which is not conducive to high integration and miniaturization of the system

Method used

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  • Small differential notch UWB-MIMO antenna

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Effect test

Embodiment 1

[0033] Such as figure 1 with figure 2 As shown, the UWB-MIMO antenna of this embodiment includes a dielectric substrate 1, a floor arranged on the top layer of the dielectric substrate 1, and four quadrilaterals separated by a pair of diagonal lines on the top layer of the dielectric substrate 1 and a pair of diagonal lines on the bottom layer of the dielectric substrate 1. An antenna unit, the floor is etched with four symmetrical slits on a pair of diagonal lines on the top layer of the dielectric substrate 1, and the four antenna units are separated by four slits, which can improve the distance between the four units isolation;

[0034] The four antenna units are respectively the first antenna unit 2, the second antenna unit 3, the third antenna unit 4 and the fourth antenna unit 5; the first antenna unit 2 includes a first T-shaped antenna etched on the floor The slot 6 and the first differential feed structure 7 arranged on the bottom layer of the dielectric substrate ...

Embodiment 2

[0041] The dielectric substrate 1 adopted in this embodiment is an FR4 dielectric substrate, and its dielectric constant ε e =4.4, thickness d=1.6mm, the floor is printed on the top layer of the dielectric substrate 1, and the differential feeding part is printed on the bottom layer of the dielectric substrate 1; the structures of the four antenna elements are basically the same, and the arrangement in this way can greatly reduce the size of the antenna, In each antenna unit, the differential signal is fed from P+ (P1+, P2+, P3+, P4+) and P- (P1-, P2-, P3-, P4-), and the T-shaped slot is fed through the differential feeding structure. The differential feed structure is composed of microstrip feeders, and it is designed in the form of chamfered corners, which can realize ultra-wideband operation; the vertical placement of the differential feed structure and the T-shaped slot makes it impossible for the common-mode signal to excite the slot, and the common-mode signal can be cert...

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PUM

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Abstract

The invention discloses a small differential notch UWB-MIMO antenna, which comprises a dielectric substrate, a floor board arranged at the top layer of the dielectric substrate and four antenna units, wherein the four antenna units are separated through a pair of diagonal lines of the top layer of the dielectric substrate and a pair of diagonal lines of the bottom layer of the dielectric substrate; four slots which are symmetrical mutually are etched on the pair of diagonal lines of the top layer of the dielectric substrate by the floor board; the four antenna units are separated by the four slots; each antenna unit comprises a T-shaped slot etched in the floor board and a differential feeder structure arranged on the bottom layer of the dielectric substrate, and the T-shaped slot is internally provided with a resonance branch. The UWB-MIMO antenna has the advantages of small size, wide frequency band, good radiation pattern and the like, and can meet requirements of miniaturization, low cost, easy processing, easy integration with a differential circuit and no interference with other systems.

Description

technical field [0001] The invention relates to a UWB-MIMO antenna, in particular to a miniaturized differential notch UWB-MIMO antenna, which belongs to the technical field of wireless mobile communication. Background technique [0002] Traditional communication theory has always regarded multipath propagation as an unfavorable factor in signal transmission, because the superposition of multipath signal copies with different delays will produce destructive interference and make the link performance unstable. The MIMO technology emerging in recent years proposes to set multiple transmitting antennas and receiving antennas at the transmitting end and receiving end respectively, so that the multipath effect of the wireless communication system can be used to improve the performance of the link. MIMO technology can fully develop space resources, and improve the communication quality (such as error rate) or communication efficiency (such as data rate) of each user under limited ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q1/52H01Q5/328H01Q5/335
CPCH01Q1/52H01Q5/328H01Q5/335
Inventor 涂治红柳炎炎
Owner SOUTH CHINA UNIV OF TECH
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