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Micro-strip resonator and micro-strip filter

A microstrip filter and microstrip resonance technology, applied in resonators, waveguide devices, electrical components, etc., can solve the problems of weakening the parasitic coupling effect of non-adjacent resonators, achieve a wide range of frequencies, weaken parasitic coupling, etc. , Q value has little effect

Inactive Publication Date: 2010-06-16
INST OF PHYSICS - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the above technical problems, a microstrip resonator and a microstrip filter are provided, the purpose of which is to effectively weaken the influence of parasitic coupling between non-adjacent resonators and overcome the problems caused by traditional methods

Method used

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  • Micro-strip resonator and micro-strip filter

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Embodiment 1

[0037] The filter center frequency is 8GHz and the bandwidth is 100MHz. refer to Figure 4 , 5, using microstrip line, the microstrip line is a superconducting microstrip line, the upper layer of the microstrip conductor 3 and the lower layer of the ground plane conductor 1 are both YBCO high temperature superconducting thin films, and the middle is a single crystal dielectric with a dielectric constant of r slices to form a microstrip filter. The microstrip line selected in this embodiment adopts crystal medium MgO, and its dielectric constant r=9.7. In this embodiment, an asymmetric structure microstrip resonator ( Figure 5a ), the size of the resonator is 1.0mm×2.5mm, and the line width is 0.2mm; the positional relationship between the resonators can be changed by horizontal flipping, so that the coupling form between adjacent resonators can present electrical coupling ( Figure 5b ) or magnetically coupled ( Figure 5c ); By arranging these two arrangements together, ...

Embodiment 2

[0039] The filter center frequency is 2.450GHz and the bandwidth is 10MHz. Referring to Figures 5 and 7, using a microstrip line, the microstrip line is a superconducting microstrip line, the upper layer of the microstrip conductor 3 and the lower layer of the ground plane conductor 1 are both YBCO high-temperature superconducting films, and the middle layer is a dielectric constant of r A single crystal dielectric sheet forms a microstrip filter. The microstrip line selected in this embodiment adopts the crystal medium LaAlO3, and its dielectric constant r=23.65. Another asymmetric structure microstrip resonator ( Figure 7a ), the size of the resonator is 1.8mm×5.1mm, and the line width is 0.3mm; by flipping and changing the positional relationship between the resonators, the coupling form between adjacent resonators can be electrically coupled ( Figure 7b ) or magnetically coupled ( Figure 7c ); By arranging these two arrangements together, a 10th-order filter is forme...

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Abstract

The invention relates to a micro-strip resonator and a micro-strip filter. The micro-strip resonator has an asymmetrical structure and is formed by a micro-strip, wherein the micro-strip resonator is of a folded line shape and a starting section and a tail section of the micro-strip are iso-directionally arranged. Without complex design, the invention weakens the inter coupling between the resonators which are not adjacent so the frequency application scope of the filter is wider, the influence on a resonator Q value is small and the filter loss is not increased.

Description

technical field [0001] The invention relates to the field of microwave engineering, in particular to a microstrip resonator and a microstrip filter. Background technique [0002] In microwave engineering, microstrip filters (a passive device) are composed of multiple microstrip resonators and are used in various microwave devices (such as radars, mobile phone base stations, microwave communication devices, radio astronomy telescopes, etc.). To select a signal of a certain frequency, that is, use the filter to pass the required signal frequency smoothly (that is, pass through the passband of the filter), and suppress the unnecessary signal frequency (that is, pass the out-of-band suppression of the filter). [0003] Existing microstrip filters mainly use symmetrical resonators, and the coupling mode between adjacent resonators is fixed electrical coupling or magnetic coupling. Due to the serious parasitic coupling between non-adjacent resonators, This leads to poor filter pe...

Claims

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Application Information

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IPC IPC(8): H01P7/08H01P1/203
Inventor 高路孙亮李春光张强李翡王跃辉于涛郭进边勇波崔彬王佳何晓峰李娜张雪强黎红何豫生
Owner INST OF PHYSICS - CHINESE ACAD OF SCI
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