CN-122026048-A - Asymmetric response superconducting resonator loaded with vertical through holes and interdigital capacitors and superconducting filter based on resonator

CN122026048ACN 122026048 ACN122026048 ACN 122026048ACN-122026048-A

Abstract

The invention particularly relates to an asymmetric response superconducting resonator loaded with a vertical through hole and an interdigital capacitor and a superconducting filter based on the resonator, and belongs to the technical field of high-temperature superconducting circuits and microwave communication. The filter comprises a dielectric substrate, a high-temperature superconducting thin film layer and a circuit constructed on the dielectric substrate, wherein the circuit comprises four single-end grounding folding microstrip structures, an interdigital capacitor, a rectangular microstrip block grounding structure, a feeder auxiliary line, an input/output microstrip feeder line and a grounding through hole, and eight pole frequencies are provided by four grounding multimode resonators. The independent regulation and control of the odd-even mode frequency and the flexible control of the transmission zero point are realized by adjusting the width of the grounding structure of the rectangular microstrip block and the length and the position of the interdigital capacitor. The invention has the advantages of no need of additional topological structure, reduced device volume, low insertion loss, remarkably improved filter selectivity and out-of-band rejection performance, compatibility with the existing film technology, meeting the requirements of miniaturization and batch production, and outstanding industrialization potential.

Inventors

LU XILONG
Weng Bokai
ZHANG RUI
ZHOU SHIGANG
WEI GUANGSONG
LIU QINGYUE

Assignees

西北工业大学太仓长三角研究院

Dates

Publication Date: 20260512
Application Date: 20260306

Claims (10)

1. The utility model provides an asymmetric response superconducting resonator of loading vertical through-hole and interdigital electric capacity, its characterized in that includes the dielectric substrate and is located high temperature superconducting thin film layer on the dielectric substrate, construct the resonator structure on the high temperature superconducting thin film layer, the resonator structure includes single-end ground connection folding microstrip structure, interdigital electric capacity, rectangular microstrip piece ground structure and ground connection through-hole, wherein: the interdigital capacitor is integrated in the single-end grounded folding microstrip structure, and the grounding function is realized by connecting the rectangular microstrip block grounding structure with the grounding through hole.
2. The asymmetrical response superconducting resonator of claim 1, wherein the high-temperature superconducting thin film layer is made of yttrium barium copper oxide YBCO or bismuth strontium calcium copper oxide BSCCO.
3. The asymmetrically responsive superconducting resonator according to claim 1, wherein the single-ended grounded folded microstrip structure is of microstrip line meander design to reduce resonator volume.
4. A superconducting filter based on the resonator of claim 1, comprising a dielectric substrate and a high temperature superconducting thin film layer on the dielectric substrate, wherein a filter circuit is constructed on the high temperature superconducting thin film layer, and the filter circuit comprises a plurality of resonators, a first feeder auxiliary line structure, a second feeder auxiliary line structure, and an input and an output 50 Microstrip feed line, multiple resonators misoriented, input 50 The microstrip feed line is positioned at one side of the resonator and outputs 50 The microstrip feed line is positioned at the other side of the resonator, and the first feed line auxiliary line structure and the input 50 Microstrip feeder line connection, second feeder line auxiliary line structure and output 50 Microstrip feeder line connection.
5. A superconducting filter based on the resonator according to claim 4, wherein when the filter is a four-order transverse cross-coupling filter, the superconducting filter comprises four resonators, and the four resonators are respectively a first grounded multimode resonator, a second grounded multimode resonator, a third grounded multimode resonator and a fourth grounded multimode resonator from input to output, and the four resonators are all placed in parallel, wherein the first grounded multimode resonator and the rectangular microstrip block grounding structure of the third grounded multimode resonator are oriented in a consistent manner; the first feeder auxiliary line structure and the input 50 The microstrip feeder line is connected and positioned at the left side of the first grounded multimode resonator; The second feeder auxiliary line structure and output 50 The microstrip feeder is connected and positioned on the right side of the fourth grounded multimode resonator.
6. The superconducting filter according to claim 5, wherein the even mode frequency positions of the first grounded multimode resonator, the second grounded multimode resonator, the third grounded multimode resonator, and the fourth grounded multimode resonator are controlled by adjusting the widths of the rectangular microstrip patch grounding structures included in the first grounded multimode resonator, the second grounded multimode resonator, the third grounded multimode resonator, and the fourth grounded multimode resonator, and the grounding via radius.
7. The superconducting filter according to claim 5, wherein odd mode frequency positions of the first grounded multimode resonator, the second grounded multimode resonator, the third grounded multimode resonator, and the fourth grounded multimode resonator are controlled by adjusting lengths of interdigital capacitors included in the first grounded multimode resonator, the second grounded multimode resonator, the third grounded multimode resonator, and the fourth grounded multimode resonator, respectively.
8. The superconducting filter according to claim 5, wherein cross coupling is generated between the first grounded multimode resonator, the second grounded multimode resonator, the third grounded multimode resonator, and the fourth grounded multimode resonator by adjusting positions of interdigital capacitors included in the first grounded multimode resonator, the second grounded multimode resonator, the third grounded multimode resonator, and the fourth grounded multimode resonator, respectively, for providing and controlling transmission zeros outside a pass band of the filter and positions thereof.
9. The superconducting filter of claim 4, wherein the first feeder line structure is a meander line.
10. The superconducting filter of claim 4, wherein the second feeder line structure is a meander line.

Description

Asymmetric response superconducting resonator loaded with vertical through holes and interdigital capacitors and superconducting filter based on resonator Technical Field The invention relates to the technical field of high-temperature superconducting circuits and microwave communication, in particular to an asymmetric response superconducting resonator loaded with a vertical through hole and an interdigital capacitor and a superconducting filter based on the same. Background Modern wireless communication and radar equipment continuously evolve towards miniaturization trend, and more harsh comprehensive indexes are provided for front-end filter devices. High temperature superconducting filters have been widely used in high performance filter designs due to their excellent characteristics, such as low insertion loss and high quality factor. In order to meet the miniaturization wave trend of the system, researchers continuously optimize various resonator topological structures, maintain excellent electrical performance while greatly compressing geometric dimensions, and further enable the filter to be widely deployed on platforms such as miniature radars. The traditional method for introducing transmission zero in the filter design mainly comprises the following two methods, namely a first method for realizing the transmission zero by introducing cross coupling and a second method for loading quarter wavelength branches. Introducing cross-coupling in the filter requires arranging the resonators in the filter into a specific layout, which limits the freedom of filter design. The method of loading quarter wavelength lines inevitably introduces an extra topological mechanism, thereby improving the design complexity and size. There is an urgent need to propose new methods and new structures for introducing transmission zeros. It should be noted that the information disclosed in the above background section is only for enhancing understanding of the background of the invention and thus may include information that does not form the prior art that is already known to those of ordinary skill in the art. Disclosure of Invention The method aims to solve the problems that the transmission zero point of the traditional high-temperature superconducting filter is limited in introduction mode (low in design freedom and increased in size due to dependence on specific cross coupling layout or additional branch lines), insufficient in selectivity and out-of-band rejection performance, difficult to independently regulate and control odd-even mode frequency, contradiction between structural integration and miniaturization and poor in process compatibility. The invention provides an asymmetric response superconducting resonator based on a loading vertical through hole and an interdigital capacitor and a superconducting filter based on the resonator. Other features and advantages of the invention will be apparent from the following detailed description, or may be learned by the practice of the invention. According to a first aspect of the present invention there is provided an asymmetrically responsive superconducting resonator loaded with vertical via and finger capacitance, comprising: The high-temperature superconductive thin film structure comprises a dielectric substrate and a high-temperature superconductive thin film layer positioned on the dielectric substrate, wherein a resonator structure is constructed on the high-temperature superconductive thin film layer, the resonator structure comprises a single-end grounded folding microstrip structure, an interdigital capacitor, a rectangular microstrip block grounding structure and a grounding through hole, wherein: the interdigital capacitor is integrated in the single-end grounded folding microstrip structure, and the grounding function is realized by connecting the rectangular microstrip block grounding structure with the grounding through hole. In some exemplary embodiments, the material of the high-temperature superconductive film layer is Yttrium Barium Copper Oxide (YBCO) or Bismuth Strontium Calcium Copper Oxide (BSCCO). In some exemplary embodiments, the single-ended folded microstrip structure employs a microstrip line meander design to reduce resonator volume. According to a second aspect of the present invention, there is provided a resonator-based superconducting filter comprising a dielectric substrate and a high temperature superconducting thin film layer on the dielectric substrate, the high temperature superconducting thin film layer having a filter circuit constructed thereon, the filter circuit comprising a plurality of resonators, a first feeder auxiliary line structure, a second feeder auxiliary line structure, and an input and an output 50Microstrip feed line, multiple resonators misoriented, input 50The microstrip feed line is positioned at one side of the resonator and outputs 50The microstrip feed line is positioned at the other side of the resonator, a