A three-mode high-temperature superconducting filter

Abstract

The invention discloses a three-mode high-temperature superconducting filter. The three-mode high-temperature superconducting filter includes: a dielectric substrate and a high-temperature superconducting thin film layer on the dielectric substrate. The high-temperature superconducting thin film layer is placed on the A filter circuit is formed on the dielectric substrate, and the filter circuit includes: a first microstrip structure, a second microstrip structure, a third microstrip structure and a 50Ω feeder, wherein: the first microstrip structure is an interdigitated The coupling structure, the second microstrip structure is a step impedance structure; the 50Ω feeder line is symmetrically distributed on the outside of the first microstrip structure, and the second microstrip structure and the first microstrip structure are distributed on the inside of the first microstrip structure. Three microstrip structures; the end of the interdigitated coupling region of the first microstrip structure is provided with a second microstrip structure. The three-mode high-temperature superconducting filter in the embodiment of the present invention has the characteristics of low loss, wide stop band, small structure, flexible design, etc., and is suitable for making by using a high-temperature superconducting thin film with a high quality factor.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a three-mode high-temperature superconducting filter. Background technique [0002] In recent years, with the rapid development of modern wireless systems, spectrum resources have become increasingly tight, and the demand for high-performance, highly integrated circuits has increased. The filter is an important component of the communication RF front-end, and its characteristics directly determine the performance of the entire communication system. [0003] In order to achieve filtering performance with high selectivity and controllable bandwidth, the traditional method is to realize it by cascading multiple UIR resonators. This implementation needs to introduce multiple resonators, which requires a large circuit area and large insertion loss. In order to adapt to the development trend of miniaturized circuits on the basis of satisfying high performance, many scholars hav...

AI Technical Summary

Problems solved by technology

Compared with traditional filters, the high-temperature superconducting film and substrate of high-temperature superconducting filters have their unique electromagnetic characteristics. At the same time, the production cost of high-temperature superconducting is still relatively expensive. Research has not only scientific value but also broad commercial value

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