Multilayer Low Pass Filter Using LTCC Technology[1]374 JOURNAL OF ELECTRONIC SCIENCE AND TECHNOLOGY OF CHINA, VOL. 5, NO. 4, DECEMBER 2007 Multilayer Low Pass Filter Using LTCC Technology Xi-Dan Chen, Ying-Li Liu, and Yuan-Xun Li AbstractThe implementation and characteristics of a compact lumped-element three-order low pass filter are presented in this paper. The filter with 120 MHz cut off frequency，as well as more than 20 dB of the attenuation above 360 MHz frequency band is successfully manufactured in an LTCC substrate with 40 μm layer thickness. The overall size of the filter is 2.0 mm×1.2 mm×0.9 mm. A good coincidence between the measured results and the full-wave electromagnetic designed responses is observed. Index Termslow pass filter, low temperature co-fired ceramic (LTCC), lumped-element filter , multilayer RF circuits. wide ……