Design of compact ultra wide bandpass filter (UWBPF) with metamaterial - Comparison between different CSRRs

Abstract

In this paper, a compact size ultra-wide band pass and bandstop filter using composite right/left-handed (CRLH) transmission line loaded with complementary split ring resonators (CSRRs) in planar technology is presented. The bandpass filter resonating at two resonant frequency band is designed with transmission line loaded with short circuited stub is presented. The using resonant type CSRR metamaterial is implemented to convert the dual band to wide band is shown. Also a comparative study of different types of CSRR metamaterial with their equivalent circuit and their effect on the results is briefly discussed. The total dimension of Compact filter is 9.6×6.5 mm with microstrip line which is above the Roger 3010 substrate gives the passband from 5 GHz to 12 GHz with the return loss of 15dB which is 3GHz improvement in bandwidth comparing with the reference paper. Such small device with wide bandwidth can be easily integrated into the communication systems requiring high data rates.