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A broadband MIMO differential filter slot antenna

A differential filtering, slot antenna technology, applied in the field of antennas, can solve the problems of large occupied volume and less MIMO filter antennas, and achieve the effects of flat gain, good low cross-polarization, and good impedance matching performance

Inactive Publication Date: 2019-04-05
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The filter at the front end of the antenna plays the role of filtering clutter and improving the selectivity of the passband edge, but the connection between the filter and the MIMO antenna occupies a large volume in the system, which cannot meet the requirements of modern communication systems. The filter antenna can realize filtering and radiation functions, and the integrated design of filters and MIMO antennas can save system size and reduce losses
However, due to the mutual influence between adjacent elements of the MIMO antenna, it is still a difficult point to use the filter design method to integrate the design of the MIMO filter antenna.
At present, there are relatively few studies on MIMO filter antennas, especially differential MIMO filter antennas.

Method used

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  • A broadband MIMO differential filter slot antenna
  • A broadband MIMO differential filter slot antenna
  • A broadband MIMO differential filter slot antenna

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Embodiment Construction

[0045] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific preferred embodiments.

[0046] The MIMO broadband differential filtering slot antenna of the present invention is described in detail by taking a WLAN system operating at a center frequency of 5.2 GHz as an example.

[0047] Such as figure 1 As shown, a wideband MIMO differential filtering slot antenna includes an antenna board and four differential filtering slot antenna units.

[0048] The four differential filter slot antenna units are respectively A1, A2, A3 and A4 along the counterclockwise direction, A1, A2, A3 and A4 are symmetrical about the center point of the antenna board, and two adjacent differential filter slot antenna units are perpendicular to each other.

[0049] Such as figure 2 As shown, the antenna board includes a dielectric substrate S1, an upper metal layer S2 disposed on the upper surface of the dielectric substrate, and ...

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Abstract

The invention discloses a broadband MIMO differential filter slot antenna comprising an antenna board and four differential filter slot antenna units; the four differential filter slot antenna units are symmetric about a center point of the antenna board, and each two adjacent differential filter slot antenna units are perpendicular to each other; the antenna board comprises a dielectric substrate, an upper metal layer and a lower metal layer; each differential filter slot antenna unit comprises a slot radiator, a dual mode resonator and two microstrip feeders; the dual mode resonator comprises a closed loop microstrip line and two short-circuit stubs; and each of the short-circuit stubs is provided with a metal through-hole. The antenna of the invention has a steep skirt band and overallefficiency of in-band flatness, maintains good stability and low cross polarization at different frequencies, and has strong suppression of common mode signals. Meanwhile, high isolation is realized without adoption of a decoupling network, so that the filter antenna is miniaturized.

Description

technical field [0001] The invention relates to the field of antennas, in particular to a broadband MIMO differential filter slot antenna. Background technique [0002] Noise effects play a critical role in the performance of most radio frequency and microwave communication systems. The balanced circuit widely used at present can suppress the common mode noise very well. However, it is necessary to use a balun to connect the antenna and the balanced circuit, which occupies a large volume and consumes a lot of energy, which is not conducive to integration and miniaturization. [0003] On the other hand, with the rapid development of wireless communication technology, the problem of limited channel capacity has received more attention. However, new problems such as multipath fading and poor system stability will appear again. MIMO antennas can suppress channel fading by increasing the number of antennas. At present, the research on MIMO antennas is relatively mature, but mo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q1/38H01Q1/36H01Q1/50H01Q5/50H01Q13/18
CPCH01Q1/36H01Q1/38H01Q1/50H01Q5/50H01Q13/18
Inventor 徐涛韩杨昆孙亮薛一凡邓宏伟
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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