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Rectangular waveguide resonant cavity filled with metal mushroom metamaterial

A rectangular waveguide and metal-filled technology, applied in the information field, can solve problems such as unfavorable communication and radar low-loss applications, difficulty in integration, and dielectric loss

Active Publication Date: 2021-09-07
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003]In order to improve the Q value of the resonator, the traditional waveguide resonator, such as the rectangular resonator, is often filled with air, but this brings too large volume and is difficult to integrate The problem
On the other hand, in order to reduce the size of the cavity, a medium with a high dielectric constant can be filled in the cavity, thereby reducing the resonant frequency of the resonant cavity, but on the other hand, filling the medium also brings additional dielectric loss
This dielectric loss is often much greater than the conductor loss, resulting in a greatly reduced overall Q value of the resonator, which does not take advantage of the low-loss applications of communications and radar

Method used

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  • Rectangular waveguide resonant cavity filled with metal mushroom metamaterial
  • Rectangular waveguide resonant cavity filled with metal mushroom metamaterial
  • Rectangular waveguide resonant cavity filled with metal mushroom metamaterial

Examples

Experimental program
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Effect test

Embodiment 1

[0032] see Figure 1 ~ Figure 3 , a rectangular waveguide resonant cavity filled with a metal mushroom superstructure material, comprising a rectangular waveguide resonator, the rectangular waveguide resonant cavity is filled with a metal mushroom superstructure material 1: select one inside the rectangular waveguide resonant cavity with the upper and lower The metal surface is parallel to the middle plane, and a metal mushroom superstructure material 1 is filled in the middle plane. The metal mushroom superstructure material 1 is composed of several rectangular metal mushroom patches 2, and each piece of rectangular metal mushroom patch 2 is different. connected, and each of the rectangular metal mushroom patches 2 realizes metal interconnection with the lower surface of the cavity through the metal pillar 3 located in the center, forming an overall structure in the shape of a mushroom.

[0033] The rectangular resonant cavity proposed in this embodiment has a simple structur...

Embodiment 2

[0035] This embodiment is basically the same as Embodiment 1, and the special features are as follows:

[0036] In this embodiment, the background medium inside the cavity of the rectangular waveguide resonator is air 4 . In order to achieve the requirement of low dielectric loss.

[0037] In this embodiment, when the overall size of the cavity is fixed, by adjusting the height from the middle plane to the lower surface of the cavity, the unit period size of the metal mushroom metamaterial 1, the size of the rectangular metal mushroom patch 2, and the metal post 3 diameter and height of any one or several parameters to realize the control of resonant frequency and Q value of the resonant cavity.

[0038] In this embodiment, the number of the metal pillars 3 is 1 or any reasonable integer greater than 1.

[0039] In this embodiment, the metal mushroom patch 2 of the metal mushroom superstructure material 1 can be, but not limited to, a square metal patch, a rectangular metal ...

Embodiment 3

[0043] In this example, see Figure 1~3 , the rectangular waveguide resonant cavity filled with metal mushroom superstructure material, as can be seen from the figure, the internal length of the cavity is L=40mm, the width W=40mm, and the height H=5mm. Select a middle plane parallel to the upper and lower metal surfaces inside the cavity, and its height to the lower surface of the cavity is H2=3.74mm, and a metal mushroom superstructure material 1 is designed in the middle plane, and the metal mushroom superstructure material 1 contains 4×4 units. Each unit includes a rectangular metal mushroom patch 2 and a metal post 3 located in the center of the rectangular metal mushroom patch 2 , and the rectangular metal mushroom patch 2 realizes metal interconnection with the lower surface of the cavity through the metal post 3 .

[0044] The periodic dimension of the metal mushroom metamaterial 1 is pL=pW=10mm. The rectangular metal mushroom patch 2 is a square metal patch, the late...

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Abstract

The invention discloses a rectangular waveguide resonant cavity filled with a metal mushroom metamaterial, and compared with a traditional rectangular resonant cavity, the resonant cavity has a smaller electrical size. The rectangular waveguide resonant cavity does not involve a filling dielectric material, so dielectric loss does not exist, and compared with a rectangular waveguide resonant cavity filled with the dielectric material, the rectangular waveguide resonant cavity has a very high Q value. By applying the metal mushroom metamaterial, the size of the resonant cavity is far smaller than the wavelength, in addition, the Q value of the resonant cavity is evaluated based on a port S parameter method, and it is found that compared with a traditional rectangular waveguide resonant cavity filled with common Rogers series dielectric materials, the Q value of the novel resonant cavity is improved by 109%. The rectangular waveguide resonant cavity filled with the metal mushroom metamaterial disclosed by the invention is simple in structure, easy to realize and obvious in miniaturization effect, has a very high Q value and very low economic cost, and can well meet current engineering application requirements.

Description

technical field [0001] The invention relates to the field of information technology, and proposes and discloses a rectangular waveguide resonant cavity filled with a metal mushroom superstructure material, which is a miniaturized high-Q rectangular waveguide resonant cavity in the microwave frequency band, and the resonant cavity can be used for mobile communication and Miniaturized radar RF front-end. Background technique [0002] With the development of modern mobile communication and miniaturized radar technology, the size of the corresponding RF front-end equipment is gradually reduced. Among many radio frequency and microwave devices, microwave resonant cavity is a very important device. In addition to requiring a smaller size, the microwave resonator also needs to have lower loss, which requires a microwave resonator that is both miniaturized and has a high Q value. Generally speaking, it is difficult for a circuit composed of discrete components to achieve a high Q ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01P7/10
CPCH01P7/10
Inventor 徐晓非孙飞虎皮卡娅
Owner SHANGHAI UNIV
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