Compact Wideband Ltcc Bandpass Filter Exploiting Eighth-Mode Siw Loaded With Csrr

A compact eighth-mode substrate integrated waveguide (EMSIW) LTCC filter is proposed, its electrical size is reduced by a complementary split-ring resonator loaded on the EMSIW. The filter is fabricated on multilayer ceramic, which, make the filter further compact. The filter was fabricated and measured. Results show the filter operating at 12.7 GHz with about 20.4% bandwidth. The measured minimum insertion is 1.3 dB, with an attenuation level of more than 25 dB from 4 to 10.0 GHz. The volume of filter is only 5.0 X 5.0 X 0.6 mm(3). (C) 2014 Wiley Periodicals, Inc.