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Implementation method of filter antenna based on cross-coupling to suppress mutual coupling between channels

A cross-coupling and filtering antenna technology, applied in the direction of antenna, antenna coupling, antenna components, etc., can solve the problem of not being able to improve the forward and backward mutual coupling at the same time, and the effect is limited, and achieve high frequency selectivity and high mutual coupling. The effect of suppressing the effect

Active Publication Date: 2020-09-25
SHANGHAI JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Aiming at the problems of the prior art that have limited effect on mutual coupling suppression between filtering antenna array channels, need to add additional circuits or structural units, and cannot improve forward and backward mutual coupling at the same time, the present invention proposes a method based on cross-coupling to suppress mutual coupling between channels. The implementation method of the coupled filter antenna, the antenna can effectively control the parasitic coupling effect between channels while each channel has filtering characteristics

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  • Implementation method of filter antenna based on cross-coupling to suppress mutual coupling between channels
  • Implementation method of filter antenna based on cross-coupling to suppress mutual coupling between channels
  • Implementation method of filter antenna based on cross-coupling to suppress mutual coupling between channels

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Embodiment 1

[0034] Such as Figure 2aAs shown, it is a filter antenna without decoupling treatment, which includes: the first antenna port 1 and the second antenna port 2, the first and second coupling resonator networks 3, 4 connected thereto, respectively connected to the first and the first and second radiators 5, 6 at the end of the second coupled resonator network, each coupled resonator network is composed of 4 sequentially directly coupled resonators 301-304 or 401-404, and the resonators 304, 404 They are integrated with the first radiator 5 and the second radiator 6 respectively. There is an inherent mutual coupling 7 between the first radiator 5 and the second radiator 6, which causes forward and backward coupling between the two filter antenna channels, which will respectively distort the antenna pattern and make the connection between the two channels The isolation characteristics between them deteriorate.

[0035] Such as Figure 2b As shown, the filtering antenna comparat...

Embodiment 2

[0039] Such as Figure 4a shown, corresponding to Figure 2a Embodiment 2 adopted in Comparative Example 1 includes: first and second antenna ports 1, 2, first and second coupled resonator networks 3, 4 connected thereto, respectively connected to the first and second coupled resonator The first and second radiators 5 and 6 at the end of the network form four sequentially directly coupled resonators 301-304 and 401-404 of each coupled resonator network, and the resonators 304 and 404 are respectively connected to the first radiator 5, The second radiator 6 is integrated, the inherent mutual coupling 7 that exists between the first and second radiators, and the first span introduced between the third resonators 303 and 403 of the two coupled Channel cross-coupling 8, a second cross-channel cross-coupling 9 introduced between the second resonators 302 and 402 of the two coupled resonator networks. Except for the first and second cross-channel cross-couplings 8, 9, other parts ...

Embodiment 3

[0042] Such as Figure 5a shown, corresponding to Figure 2a Embodiment 3 adopted in Comparative Example 1 includes: first and second antenna ports 1, 2, first and second coupled resonator networks 3, 4 connected thereto, respectively connected to the first and second coupled resonator The first and second radiators 5 and 6 at the end of the network form four sequentially directly coupled resonators 301-304 and 401-404 of each coupled resonator network, and the resonators 304 and 404 are respectively connected to the first radiator 5, The second radiator 6 is integrated, the inherent mutual coupling 7 existing between the first and second radiators, and the introduction between the first radiator 5 and the second resonator 402 of the second coupled resonator network The first cross-channel cross-coupling 8 of the first coupling resonator network, the second cross-channel cross-coupling 9 introduced between the second resonator 302 of the first coupling resonator network and t...

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Abstract

The invention relates to a filtering antenna realization method capable of suppressing mutual coupling between channels based on cross-coupling. In an array antenna having more than two channels, inherent cross-coupling which is generated due to near field coupling or surface waves and exists between a plurality of adjacent or spatially near channels can be decoupled through cross-channel cross-coupling carried out in array antenna design. With the method adopted, the suppression of forward or (and) backward mutual coupling between the channels of a filtering antenna can be realized with no additional decoupling networks adopted. The method has the advantages of no need for extra area, no introduction of extra loss, flexibility in design and implementation, high degree of freedom of largeparameters and the like, and can be applied to a microwave millimeter wave filter antenna array system.

Description

technical field [0001] The invention relates to a technology in the field of microwave and wireless communication, in particular to a method for realizing a filter antenna based on cross-coupling and suppressing mutual coupling between channels. Background technique [0002] Microwave and wireless transceiver front-end systems usually use filters and antennas in conjunction to provide the functions of filtering out interference signals and radiating or receiving electromagnetic waves. Coordinating or merging the filter and antenna into a filter antenna can further improve the miniaturization of the antenna system, reduce the additional loss caused by impedance matching and switching, and improve the performance of the working bandwidth. However, in the filter antenna array, it may be affected by near-field coupling or surface waves, and there is mutual coupling between the channels of different filter antenna elements. The backward mutual coupling will lead to the deteriorat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q1/52
CPCH01Q1/523
Inventor 吴林晟毛军发
Owner SHANGHAI JIAOTONG UNIV