Frequency selective surface-based terahertz broadband band-pass filter

A frequency-selective surface, band-pass filter technology, applied in the field of terahertz filters, can solve the problems of narrow frequency range, broken medium, affecting filter performance, etc., to achieve reduced processing difficulty, high processing speed, and in-band pass rate. high effect

Inactive Publication Date: 2018-08-21
BEIJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

The frequency selective surface filter with a single-layer structure is relatively easy to achieve filtering performance, but the frequency range corresponding to the bandpass or bandstop is often very narrow
The FSS cascade with multi-layer metal hole structure can realize the band-pass filter characteristics of flat top and steep cut-off, but this structure has great difficulty in adjusting the distance between layers, and there are great difficulties in processing: on the one hand, The pattern of the

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  • Frequency selective surface-based terahertz broadband band-pass filter
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  • Frequency selective surface-based terahertz broadband band-pass filter

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[0025] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangement of the components and steps, the numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the invention unless specifically stated otherwise.

[0026] Meanwhile, it should be understood that, for the convenience of description, the dimensions of various parts shown in the accompanying drawings are not drawn in an actual proportional relationship.

[0027] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

[0028] Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, techniques, methods, and apparatus should be considered part of the specific...

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Abstract

The invention discloses a frequency selective surface-based terahertz broadband band-pass filter. The filter comprises a frequency selective surface layer which is of a single layer structure; the outer surface of the frequency selective surface layer is made from a metal material; multiple through holes are formed in the frequency selective surface layer, and arranged in the frequency selective surface layer at equal intervals, a periodic through hole array is formed, and frequency-selecting is conducted on a terahertz wave through coupling of the terahertz wave and the periodic through holearray. The terahertz broadband band-pass filter has the single-layer frequency selective surface structure of a porous structure, the in-band pass rate is high, the structure is simple, and the processing difficulty is greatly lowered; polarized light x and polarized light y have the same band-pass filter property, and the polarization insensitivity is achieved; due to the fact that the size and thickness of a periodic unit are large, laser drilling and other technologies can be adopted for completion, and the processing speed is high.

Description

technical field [0001] The present invention relates to the technical field of terahertz filters, in particular to a terahertz broadband bandpass filter based on a frequency selective surface. Background technique [0002] Terahertz (THz) waves generally refer to electromagnetic waves with a frequency of 0.3 to 3 THz (or a wavelength of 0.1 to 1 mm). Terahertz waves have important research value and application prospects in basic research disciplines such as physics, chemistry, and life sciences, as well as applied disciplines such as medical imaging, security inspection, product testing, space communication, and weapons guidance. It is difficult for conventional materials to generate electromagnetic responses, especially magnetic responses, in the terahertz band, and there are many blank spots in scientific research and technical applications in the terahertz band. Artificial electromagnetic materials can break through the limitations of the degree of freedom in changing t...

Claims

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Application Information

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IPC IPC(8): H01P1/20
CPCH01P1/20H01P1/2002
Inventor 亓丽梅武明静陈智娇姚远俞俊生
Owner BEIJING UNIV OF POSTS & TELECOMM
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