Broadband, High Isolation MIMO Loop Antenna Based on Electromagnetic Coupling

A technology of electromagnetic coupling and loop antenna, applied in the directions of loop antenna, antenna, antenna coupling, etc., can solve the problems of reducing antenna coupling, decreasing isolation level, and unavoidable coupling of multiple antennas and single antennas, and achieves improved isolation and compact structure. , the effect of high isolation

CN109149106BActive Publication Date: 2021-01-05HANGZHOU DIANZI UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2021-01-05

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Abstract

The invention discloses a broadband high-isolation MIMO loop antenna based on electromagnetic coupling. The invention comprises four radiating units with the center located on the same straight line,the distance between adjacent radiating units is 5 mm, and the minimum electrical length is 0.03850 [lambda]0 ([lambda)0 is the lowest resonant wavelength); Each radiating element comprises four radiating elements, a dielectric substrate; The radiating element comprises three splitting rings and a parasitic band, wherein the three splitting rings are respectively a main radiating ring, a feeding ring and a parasitic ring. The proposed MIMO antenna, which consists of four radiating elements with sub-wavelength range, can achieve high isolation without any additional decoupling structure. The proposed antenna can be widely used in future 5G wireless systems.
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Description

technical field

[0001] The invention belongs to the technical field of wireless communication, and proposes a broadband, high-isolation MIMO loop antenna based on electromagnetic coupling. Background technique

[0002] Due to the rapid development of wireless communication systems, the demand for antennas is getting higher and higher, such as small size, wide bandwidth, and high isolation, and the demand for such antennas is also increasing. Multiple-Input Multiple-Output (MIMO) systems have been used to increase channel capacity and reliability. MIMO (Multiple-Input Multiple-Output) technology, that is, multiple-input multiple-output technology, refers to the use of multiple transmitting antennas and receiving antennas at the transmitting end and receiving end, so that signals are transmitted and received through multiple antennas at the transmitting end and receiving end. Thereby improving the communication quality. The isolation between antenna elements in a MIMO antenn...

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Embodiment Construction

[0036] The design method of the present invention will be further described below in conjunction with the accompanying drawings.

[0037] A broadband, high-isolation MIMO loop antenna based on electromagnetic coupling proposed by the present invention is composed of four multi-mode loop antennas. Broadband loop antennas such as figure 1 shown. figure 1 (a), (b), and (c) show the geometry of the radiating elements that make up the MIMO loop antenna, corresponding to the top, side, and bottom views, respectively.

[0038] Such as figure 1 As shown, the radiation element of the antenna of the present invention includes a main radiation loop (1), a feed loop (2), a parasitic strip (3), a feed port (5), a 0805 package chip capacitor (4), a parasitic loop (6 ), the dielectric substrate (7) adopts FR4 substrate; the proposed antenna is a two-layer printed antenna (εr=4.4, loss tangent=0.02) on a FR4 substrate (7) with a thickness of 1.0mm, and the inner part of the top layer The ...