U-shaped slot type artificial surface plasmonband elimination filter

Abstract

AU-shaped slot type artificial surface plasmonband elimination filter belongs to a multiband band elimination filter. The band elimination filter comprises a flexible dielectric substrate, a periodic metal optical grating, a U-shaped slot, a coplanar waveguide and a coupled structure, wherein the periodic metal optical grating is printed on the flexible dielectric substrate; the periodic metal optical grating is connected with the coupled structure and the coplanar waveguide; the periodic metal optical grating is combined with the U-shaped slot; the U-shaped slot represents that a metal film is not printed. The U-shaped slot type artificial surface plasmonband elimination filter has the advantages that 1, the periodicity of the U-shaped slot is selected as 1,2 and 3, band elimination filtering of one-wave band, two-wave band and three-wave band of a microwave band can be realized; 2, the structure is simple, the manufacturing is convenient, and the periodic metal optical grating structure has strong constraint on an electromagnetic field; 3, the structure of combining the periodic metal optical grating with the U-shaped slot is smaller in size and flexible, and can be applied to a microwave integration circuit with a compact size and a special function; 4, the metal optical grating structure can be applied to microwave, millimeter wave and terahertz frequency band through changing the basic parameters.

Description

technical field [0001] The invention relates to a multi-band band-stop filter, in particular to a U-shaped slotted artificial surface plasmon multi-band band-stop filter. Background technique [0002] Band-stop filters play an extremely important role in modern communication and signal processing systems, and are indispensable functional devices in microwave and millimeter wave circuits and communication systems. [0003] Artificial surface plasmons are not restricted by the diffraction limit, so they can be used in miniaturized devices, and have important applications in surface technology and integrated circuits. The U-shaped slotted multi-band band-stop filter based on artificial surface plasmons has small size and flexibility, and can be applied to a synthetic integrated circuit with compact size and special functions. This sub-wavelength structure exhibits excellent guided wave characteristics, and can realize the transmission of electromagnetic waves along irregular s...

AI Technical Summary

Problems solved by technology

[0004] However, most of the existing traditional filters are transmissive or reflective filters, the thickness of which is mostly on the order of millimeters, and the transmissive or reflective areas are also relatively large.

It does not have the characteristics of compact size, flexibility, and lightness of this new type of filter, and it is difficult to synthesize a microwave integrated circuit with compact size and special functions; or the existing traditional type of filter is not like this new type of filter. Surface-transmission band-stop filters are so easily synthesized into microwave integrated circuits with compact size and special features

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