Abstract
A study on the maximum size reduction percentage of 5G Hairpin Bandpass filter nonuniform transmission line resonator is presented in this paper. Size reduction is obtained by applying Nonumiform Transmission Lines theory on each λ/2 uniform transmission line resonator of the filter. To get the required compact-sized filter, some constraints should be applied to satisfy the matching condition in addition to meet the uniform transmission line filter design specifications. High Frequency Structure Simulator (HFSS) software and Computer Simulation Technology (CST) software are used in this study. At the best size reduction percentage, the designed filter shows good return and insertion loss : S 11 = S 22 12 = S 21 is approximately -0.29 dB (CST) and -0.46 dB(HFSS) at center frequencies, Fc = 6.9 GHz and 6.67 GHz , respectively.
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