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Band-pass filter based on equivalent localized surface plasmons and its working method

A surface plasmon and bandpass filter technology, which is applied to waveguide devices, electrical components, circuits, etc., can solve the problems of filter planarization and high Q value cannot be realized at the same time, so as to reduce the size and facilitate Integrated, highly selective effects

Active Publication Date: 2021-04-02
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a bandpass filter based on equivalent localized surface plasmons and its working method, to solve the problem that filter planarization and high Q value cannot be realized simultaneously in the prior art, At the same time reduce the size of the filter to achieve the purpose of planarization and miniaturization of high-performance filters

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  • Band-pass filter based on equivalent localized surface plasmons and its working method
  • Band-pass filter based on equivalent localized surface plasmons and its working method
  • Band-pass filter based on equivalent localized surface plasmons and its working method

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Embodiment Construction

[0021] Embodiments of the invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0022] Studies have shown that Effective Localized Surface Plasmon Polaritons (Effective Localized Surface Plasmon Polaritons, ELSPs) can more effectively simulate real LSPs in the optical frequency band at low frequencies. Add a metal line on the upper and lower sides of the dielectric body, so that the interface between the dielectric body and the air can support the LSPs mode similar to that produced by metals in the optical frequency band under light wave irradiation, and only the dipole mode, so that the excellent height field of LSPs is localized The chemical characteristics continue to the microwave and terahertz frequency bands. We can use the dipole mode of ELS...

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Abstract

The invention discloses a band-pass filter based on equivalent localized surface plasmons and its working method. The band-pass filter includes a metal bottom plate at the bottom, a dielectric substrate at the middle layer, and microstrips symmetrical at both ends of the top layer. Line and dielectric resonator; wherein the dielectric resonator includes a rectangular parallelepiped dielectric body and two metal strips, the length of the two metal strips is equal to the length of the rectangular parallelepiped dielectric body, respectively located in the middle of the upper and lower sides of the dielectric body; two microstrips The wires are used as ports to connect to the metal strips under the two dielectric resonators for feeding. The working frequency of the band-pass filter of the invention varies with the length and dielectric constant of the dielectric resonator, is insensitive to the change of the cross-sectional size of the dielectric resonator, the thickness can reach the technical limit value, and the degree of planarization is high. The invention has the advantages of simple structure, small volume, high Q value, high selectivity, planarization and easy integration, and provides a brand-new thought and solution for the design and application of the filter.

Description

technical field [0001] The invention relates to a band-pass filter based on equivalent localized surface plasmons and a working method thereof, and belongs to the technical field of miniaturized band-pass filters. Background technique [0002] With the rapid development of wireless communication technology, spectrum resources are becoming more and more crowded, and the requirements for filter performance are getting higher and higher. Not only is the filter required to be compact and easy to integrate, but it is also required to have low insertion loss, high in-band selectivity, and high out-of-band rejection. Therefore, designing small, compact and high-efficiency filters is the focus of attention in the field of modern wireless communications. In the radio frequency to microwave frequency band, there are mainly waveguides, coaxial lines, microstrip lines and dielectric resonator filters. Microstrip line filters are easy to integrate with integrated circuits such as MMIC ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01P1/203
CPCH01P1/203H01P1/20309H01P1/20327H01P1/20
Inventor 李茁于亚茹刘亮亮季玉雷姜琦赵玙璠
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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