Inclined seam separating type multi-band band elimination filter for artificial surface plasmons

Abstract

The invention discloses an inclined seam separating type multi-band band elimination filter for artificial surface plasmons, and belongs to the multi-band band elimination filters. According to the filter, a periodic metal grating is printed on a flexible medium substrate, wherein the periodic metal grating is connected with a coupling structure and a coplanar waveguide; a fine inclined seam and the periodic metal grating are combined, and the fine inclined seam is not printed with a metal film; the coplanar waveguide is a guide wave transmission structure; mutual transformation between guide waves which are transmitted by the coplanar waveguide and the artificial surface plasmons which are transmitted on the periodic metal grating is realized through the coupling structure; the periodic metal grating is an artificial surface plasmon transmission line. The fine inclined seam and the periodic metal grating are combined, and the periodic metal grating is separated at macro level. The inclined seam separating type multi-band band elimination filter has the advantages that: the surface transmission type filter has a relatively small dimension and high flexibility, and can be applied to a compound integrated circuit with a compact dimension and a special function; base parameters are changed, so that the inclined seam separating type multi-band band elimination filter can be applied to microwave, millimeter-wave and terahertz frequency bands.

Description

technical field [0001] The invention relates to a band-stop filter, in particular to an artificial surface plasmon multi-band band-stop filter with inclined slit separation. 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 slant-slit artificial surface plasmon multi-band band-rejection filter has small size and flexibility, and can be applied to a synthesized 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 surface...

AI Technical Summary

Problems solved by technology

[0004] However, most of the existing traditional filters are transmissive or reflective filters, and their thickness is mostly on the order of millimeters, and the projection area or reflection area is 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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