Dual-band Bandpass Filter with Folded Couple Lines and Pentagon Stubs

This paper proposes to present a dual-band bandpass filter with a folded coupled line. The utilization involves the adaptation of wideband concepts to be reconfigured into a dual-band format. A dual-band bandpass filter design is characterized by a pentagon stub that incorporates parallel coupled lines. The tapered lines are used for the input and output ports, which are matched with the bandpass filter. Two symmetrical sets are composed the proposed design, contributing to balanced and efficient performance in achieving dual-band functionality. In this paper, the overall dimensions of the component are 10.9×16.3 mm
²
. The material utilized for the filter is ARLON 25N The dual-tiequency range application is accepted with frequencies ranges between 2 - 4. 7 GHz and 9.8 - 11.9GHz.