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Multi-layer complementary structure terahertz band-pass filter based on frequency selective surface

A frequency selective surface, band-pass filter technology, applied in waveguide-type devices, electrical components, circuits, etc., can solve problems such as poor flatness and large insertion loss, and achieve low cost, low insertion loss, and obvious out-of-band suppression. Effect

Inactive Publication Date: 2014-01-01
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the insertion loss is large and the in-band flatness is poor

Method used

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  • Multi-layer complementary structure terahertz band-pass filter based on frequency selective surface
  • Multi-layer complementary structure terahertz band-pass filter based on frequency selective surface
  • Multi-layer complementary structure terahertz band-pass filter based on frequency selective surface

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Embodiment Construction

[0022] The present invention provides a four-arm ring-loaded complementary ELC terahertz bandpass filter based on a frequency selective surface, such as figure 1 , 2 As shown, it includes a signal input terminal 1, a substrate dielectric substrate 5, two frequency selective surface layers 3, 4 on the upper and lower surfaces of the substrate dielectric substrate, and a signal output terminal 2.

[0023] Two frequency selective surface layers are located on both sides of the substrate dielectric substrate 5, each frequency selective surface layer is composed of resonant units arranged in a periodic square, and the periodic resonant structure has N×N four arms arranged without spacing Ring-loaded CELCs units (resonant units), and N ≥ 30; the arrangement and shape of the resonant units on the two frequency selective surface layers are the same.

[0024] The resonance unit includes a square metal frame with a circular hollow in the middle, the side length of the square metal fram...

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Abstract

The invention provides a multi-layer complementary structure terahertz band-pass filter based on a frequency selective surface, and belongs to the technical field of electromagnetic wave transmission function devices. The filter comprises an underlay dielectric substrate and two frequency selective surface layers which are arranged on upper and lower surfaces of the underlay dielectric substrate; the two frequency selective surface layers are arranged oppositely with the same structure; each frequency selective surface layer comprises N*N resonance units arranged in a matrix, and N is more than or equal to 30. The filter is high in Q value, small in insert loss, flat in passband ripple, remarkable in out-of-band rejection, simple in structure and small in size, and is convenient to adjust and control and easy to process.

Description

technical field [0001] The invention belongs to the technical field of electromagnetic wave transmission functional devices, in particular to a terahertz bandpass filter. Background technique [0002] Terahertz (THz) waves usually refer to electromagnetic waves with a frequency range of 0.1THz to 10THz, which are between millimeter waves and infrared light, and have the characteristics of microwave and infrared light at the same time. They are characterized by moderate beam width and large system bandwidth. , which is very conducive to target detection imaging, high-speed and large-capacity communication. [0003] Artificial electromagnetic materials (Electromagnetic metamaterial) or composite materials (composite materials) can break through the limitations of the degrees of freedom in permittivity and permeability of existing materials in nature, and show great application potential in regulating electromagnetic waves. Artificial electromagnetic materials are designed in ...

Claims

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Application Information

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IPC IPC(8): H01P1/20
Inventor 兰峰杨梓强史宗君
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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