Abstract:
As a key component of the RF front-end of a communication system, the performance of filters is very important. In the radio Astronomy observation frequency, the surface resistance of the high-temperature superconducting (HTS) thin film material is more than two orders of magnitude lower than that of ordinary metal. Therefore, high-performance filters is designed and fabricated by using HTS material. Because the demand of anti-interference in the radio telescope is more and more urgent, the study of notch-band filters has attracted much attention. The research team has long been engaged in research in notch-band filters and has achieved some research results. This paper introduces the study and design of notch-band filters on different resonator structure types and frequency properties.