An adjustable metal wire terahertz wave direct modulator loaded outside the cavity

A metal wire and terahertz technology, which is applied in the field of externally loaded adjustable metal wire terahertz wave direct modulators, can solve problems such as application limitations and large parasitic capacitances, and achieve low modulation depth, large modulation bandwidth, and ease of use. processing effect

Active Publication Date: 2020-06-16
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The quasi-vertical planar Schottky diode has a large parasitic capacitance, and its application in the terahertz frequency band is limited

Method used

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  • An adjustable metal wire terahertz wave direct modulator loaded outside the cavity
  • An adjustable metal wire terahertz wave direct modulator loaded outside the cavity
  • An adjustable metal wire terahertz wave direct modulator loaded outside the cavity

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Experimental program
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Embodiment Construction

[0027] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0028] This embodiment provides an adjustable metal wire terahertz wave direct modulator loaded outside the cavity, and its overall structure schematic diagram is shown in figure 1 As shown, it includes a rectangular waveguide 1, a dielectric substrate, a resonant structure 2, a Schottky diode 3, a grounding stub 4 and a filter feed structure 5; the dielectric substrate runs through the wall of the rectangular waveguide cavity and is placed on the long side of the rectangular waveguide (E plane ); the lower surface of the dielectric substrate is plated with metal; the rectangular waveguide is provided with a rectangular air window at the penetration of the dielectric substrate on one side close to the filter feed structure 5, and the width of the rectangular air window is greater than or equal to the width of the dielectric substrate;

[0029] The upper...

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Abstract

The invention discloses an adjustable metal wire terahertz wave direct modulator loaded outside a cavity, and belongs to the technical field of electromagnetic functional devices. It includes a rectangular waveguide, a dielectric substrate, a resonant structure, a Schottky diode, a grounding stub and a filter feed structure; the dielectric substrate runs through the wall of the rectangular waveguide cavity and is placed on the long side of the rectangular waveguide; the upper surface of the dielectric substrate is from the inside of the rectangular waveguide to the The outside of the rectangular waveguide is a resonant structure, a Schottky diode and a filter feed structure in sequence. The invention is a two-dimensional planar structure, which can be realized by means of micro-processing, has mature technology, is easy to manufacture, and avoids difficult processing brought about by the design scheme of the complex three-dimensional structure. The invention has large modulation bandwidth, modulation depth and extremely low insertion loss, and can work under normal temperature, normal pressure and non-vacuum conditions, so the modulator of the invention has good practical application prospects.

Description

technical field [0001] The invention belongs to the technical field of electromagnetic functional devices, and in particular relates to an adjustable metal wire terahertz wave direct modulator loaded outside a cavity. Background technique [0002] The research of dynamically controlled or tunable terahertz devices is currently a hot direction and a development trend of future device research. The research of tunable devices based on metamaterials is usually based on different external conditions such as electric field, magnetic field, temperature, optical excitation, etc. to change the frequency or amplitude of the resonance point. For example, the electrical conductivity of photoconductive semiconductor materials is controlled by laser or the resistance of superconducting materials is controlled by temperature to design tunable THz modulators. This is more cost-effective than the previous method of obtaining tunability by changing the size of the structure. It does not req...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/00G02F1/01
Inventor 侯旭张雅鑫杨梓强张亭梁士雄
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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