High-isolation MIMO antenna based on field pair digestion coupling
A high-isolation and antenna technology, applied in antennas, antenna coupling, antenna arrays, etc., can solve the problems of increased signal correlation between channels, deteriorating system communication quality, and system capacity decline, achieving easy processing, good application value, low cost effect
Pending Publication Date: 2021-12-17
XIAN UNIV OF TECH
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Problems solved by technology
In a MIMO communication system, antenna mutual coupling will increase the signal correlation between channels, resulting in a decrease in system capacity; in an adaptive antenna array, mutual coupling will cause a decrease in signal-to-noise ratio, which will greatly deteriorate the communication quality of the system
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[0031] refer to figure 1 , figure 2 as well as image 3 , the present invention is a high-isolation MIMO antenna based on field cancellation decoupling. The dielectric substrate is selected from FR-4 plates or other plates using microwave frequency bands, such as Rogers, ceramics, etc., considering the operating frequency of the antenna and the required Cost, preferably FR-4 is a dielectric substrate, the dielectric constant of the dielectric substrate 1 is 4.3, the length is 32.0mm, the width is 39.0mm, and the thickness is 1.0mm; the first radiation patch 2 and the second radiation patch 3 The length is 12.55mm, the width is 16.0mm, and the distance between the first radiation patch 2 and the second radiation patch 3 is 1mm; the first feeding microstrip line 4 and the second feeding microstrip line 5 Both have a length of 15.0 mm and a width of 1.9 mm; the total length of the first L-shaped parasitic microstrip line stub 6 and the second L-shaped parasitic microstrip line...
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The invention discloses a high-isolation MIMO antenna based on field pair digestion coupling. The high-isolation MIMO antennacomprises a dielectric substrate, wherein the top surface of the dielectric substrate is symmetrically provided with a first rectangular radiation patch and a second rectangular radiation patch along a longitudinal center line, a first feed microstrip line and a second feed microstrip line are respectively fixed along one longitudinal end of the first radiation patch and one longitudinal end of the second radiation patch, a first inverted-L-shaped parasitic microstrip line branch knot and a second inverted-L-shaped parasitic microstrip line branch knot are respectively arranged on the side edges, close to each other, of the first feed microstrip line and the second feed microstrip line, the gap between the first radiation patch and the second radiation patch is provided with a cuboid-shaped decoupling dielectric wall, and two side surfaces of the cuboid-shaped decoupling dielectric wall are provided with strip-shaped metal bands. According to the invention, by using the decoupling structure, the isolation degree of the MIMO antenna at 5.4 GHz is improved to 60dB; and the high-isolation MIMO antennacan be well applied to the coupling suppression of the extremely close distance array antenna, and has a good application value.
Description
technical field [0001] The invention belongs to the technical field of electromagnetic fields and microwaves, and in particular relates to a high-isolation MIMO antenna based on field cancellation and decoupling. Background technique [0002] Coupling among multiple antennas is an unavoidable problem in many applications such as multiple-input-multiple-output (MIMO) communication systems, diversity antenna systems, and adaptive antenna arrays. In a MIMO communication system, antenna mutual coupling will increase the signal correlation between channels, resulting in a decrease in system capacity; in an adaptive antenna array, mutual coupling will cause a decrease in signal-to-noise ratio, which greatly deteriorates the communication quality of the system. Due to the detrimental effect of mutual coupling in these applications, the need for low mutual coupling between antenna elements is particularly urgent, especially when the antenna elements are placed closely together. A l...
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IPC IPC(8): H01Q1/38H01Q1/50H01Q1/52H01Q21/00
CPCH01Q1/38H01Q1/50H01Q1/521H01Q21/0075
Inventor 席晓莉杜忠红原艳宁秦沛瑜
Owner XIAN UNIV OF TECH