Design and Experimental Investigation of a Tunable Band-Pass Filter on a Symmetrical Coplanar Line

Abstract

An approximate calculation of a band-pass filter based on a symmetric coplanar line and an experimental study of the calculated filter layout with the aim of comparing the theoretical and experimental results are carried out. A layout of a tunable band-pass filter, whose operating frequency without current in the windings of a compact magnetic system was 7380 MHz, was experimentally investigated. The tuning range of the filter layout when the voltage on the windings varies from -1.2 V to +1.2 V is 6960 - 7620 MHz, and its width is 560 MHz.