Planar superconducting microstrip resonator

A resonator and microstrip technology, applied in the field of resonators, can solve the problems of increasing the volume of the resonator, increasing the resonator, reducing the parasitic coupling, etc., and achieving the effect of compact overall area, small volume, and small electromagnetic radiation.

Active Publication Date: 2009-09-30
INST OF PHYSICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, for f=300MHz, 0.5mm thick dielectric MgO (ε r =9.67), ε re =6.44,λ g =394mm; for f=300MHz, 0.5mm thick medium LaAlO3 (ε r =23.6), ε re =15.14,λ g =257mm, it can be seen that its length is very large, even if the commonly used bending form is adopted, the volume of the resonator cannot be significantly reduced, and it cannot be placed on a 2-3 inch superconducting film sub

Method used

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Example

[0037] First embodiment

[0038] Refer to figure 1 , 2 , Using a complete microstrip line, the microstrip line is a superconducting microstrip line, the upper microstrip conductor 3 and the lower ground plane conductor 1 are both high-temperature superconducting films, the middle is the dielectric constant ε rSingle crystal dielectric sheet. It forms a three-part structure consisting of a group of interdigital capacitors, a group of double helix inductances in parallel, and a group of block capacitors formed with ground in series. In this embodiment, the selected microstrip line adopts the crystal medium LaAlO3, and its dielectric constant ε r =23.6, the rectangular shape of the block capacitor is selected in this structure, the insert finger capacitor is equal in length and width, and there are two double spiral inductors, which can minimize the volume of the resonator and maximize the use of space. Insert finger capacitor lines The curves of the double spiral inductors are equa...

Example

[0046] Second embodiment

[0047] A complete superconducting microstrip line is used to form a three-part structure consisting of a group of interdigital capacitors, a group of double helix inductances in parallel, and a group of bulk capacitors formed with ground in series. In this embodiment, the block capacitor has a straight line, the interdigital capacitor has the same length and equal distance, the interdigital capacitor line is a broken line, the double helix inductor has three turns, and the curves of the double helix inductor are all equal width and equal distance, such as Figure 3b Shown.

[0048] With the exception of this embodiment, the maximum side length of the ring is 6.4mm, the maximum side width is 5.2mm, the line width of the microstrip line is 0.4mm, the distance between the inner and outer loop lines is 0.3mm, and the distance between the open ends of the inner and outer loops is 0.12mm.

Example

[0049] The third embodiment

[0050] A complete superconducting microstrip line is used to form a three-part structure consisting of a group of interdigital capacitors, a group of double helix inductances in parallel, and a group of bulk capacitors formed with ground in series. In the triangle selected for the block capacitor in this embodiment, the inserted finger capacitors are of unequal length and width, and there are two double spiral inductors, and the curves of the double spiral inductors are all unequal widths and unequal distances.

[0051] With the exception of this embodiment, the maximum side length of the ring is 6.0mm, the maximum side width is 5.2mm, the line width of the microstrip line is 0.5mm, the distance between the inner and outer loop lines is 0.3mm, and the distance between the open ends of the inner and outer loops is 0.12mm.

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Abstract

The invention relates to a planar superconducting microstrip resonator which comprises a microstrip line comprising an upper-layer superconducting film, a lower-layer superconducting film and a monocrystal medium positioned between the upper-layer and the lower-layer superconducting films, finger-inserting capacitors, a double-helix curved inductor and a blocky capacitor formed together with the ground, wherein the finger-inserting capacitors are parallel to the double-helix curved inductor, and the finger-inserting capacitors are connected with the double-helix curved inductor in parallel, and the finger-inserting capacitors and the double-helix curved inductor which are connected in parallel are connected with the blocky capacitor in series. The planar superconducting microstrip resonator has small volume and less electromagnetic radiation. The planar superconducting microstrip resonator can be used for designing and manufacturing a narrowband superconducting band-pass filter with high performance.

Description

technical field [0001] The invention relates to a resonator, in particular to a planar superconducting microstrip resonator. Background technique [0002] In microwave engineering, superconducting microstrip resonators can form different orders of planar superconducting filters (a passive device), which are used in various microwave devices (such as radars, mobile phone base stations, microwave communication devices, radio astronomy telescopes) etc.), used to select a signal of a certain frequency. In the front end of various microwave receiving systems, filters are often used to suppress unwanted signal frequencies so that the required signal frequencies can pass through smoothly. High-temperature superconducting filter is a planar device made of high-temperature superconducting materials, which is composed of several planar resonators arranged according to certain rules. For a band-pass filter made of ordinary metal, it is usually called a narrow-band filter if the relat...

Claims

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Application Information

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IPC IPC(8): H01P7/08
Inventor 于涛李春光张强孙亮李翡王跃辉高路郭进边勇波黎红张雪强罗强顾长志何豫生
Owner INST OF PHYSICS - CHINESE ACAD OF SCI
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