Influence of Substrate Parameters on the Characteristics and Dimensions of the Filter with Microstrip Spiral Resonators

摘要

In modern radio systems frequency-selective microwave devices are widely used, a lot of them are microstrip bandpass filters. In this paper the filter is implemented with two identical rectangular spiral resonators. Using such resonators a filter having a relatively small size can be obtained. The influence of the substrate parameters on the size and characteristics of the frequency-selective device are provided. All filters are obtained as a result of computer modeling and are operable with good frequency selective.