Design of microstrip parallel-coupled line band pass filters for the application in fifth-generation wireless communication

This article presents the design of microstrip parallel-coupled line bandpass filters (bpfs) for fifth-generation wireless communication application. the bpfs are designed and optimized at center frequencies of 5,15,and 28 ghz via the use of keysight's advanced design system (ads) 2015 simulator. initial lumped-element bpfs are presented prior to the realization using microstrip parallel-coupled line technique with the implementation of rogers ro4003c substrate. both performances are compared and discussed. the microstrip parallel-coupled line bpfs have optimal average performance of 8.59% bandwidth with insertion loss of 1.53 db and return loss greater than 12 db.