Tuning a single and dual band band-stop filter by using Spurline

Abstract EN

In recent years, scientists and researchers have become increasingly interested in working to increase the efficiency of filters to operate in many frequencies, to reduce the number and the size of electric circuits, which is known as tuning.

Researchers have used many designs to achieve this goal.

In this paper, we used a type of design called Spur line prototype, and we used it to create a new design for the band stop filter, because most of the previous studies used this type to design band pass filters.

The filter was designed to prevent a single band, and we were able to drive equations for the design of this type of filter.

We designed these filters in two frequencies, one at 3.25GHz and the other at 5.25Ghz.

The results from the measurements had a good agreement with the simulation results, with the rejection level being less than 20dB.

Tuning was obtained when we applied volts on filter 3.25Ghz, and we used the same equation and method to design dual band stop filter to operate on frequencies 3.25GHz and 5.25GHz.

The measurement results we obtained were identical to the simulation results, with S 21 being less than 25dB.