Title :
A Ku-band low-loss stripline low-pass filter for LTCC modules with low-impedance lines to obtain plural transmission zeros
Author :
Ohwada, T. ; Ikematsu, H. ; Oh-hashi, H. ; Takagi, T. ; Ishida, S.
Author_Institution :
Mitsubishi Electr. Corp., Kanagawa, Japan
Abstract :
A Ku-band low temperature co-fired ceramic (LTCC) multi-layered stripline low-pass filter (LPF) is presented. By employing a low-impedance line as an inductive element in the resonator, plural transmission zeros can be obtained near passband. Therefore, the presented LPF realizes excellent attenuation characteristics despite a small number of resonators. The LPF has extremely low insertion loss and compact dimensions, an especially thin profile, and is suitable for RF-modules. An LPF with dimensions of 0.9 mm/spl times/0.9 mm/spl times/0.4 mm has been fabricated, and measured results show the validity of the proposed structure.
Keywords :
ball grid arrays; low-pass filters; poles and zeros; radio transmitters; resonator filters; strip line filters; 0.4 mm; 0.9 mm; BGA transmitter modules; Ku-band low-loss stripline low-pass filter; LTCC modules; RF-modules; attenuation characteristics; compact dimensions; inductive element; low insertion loss; low temperature co-fired ceramics; low-impedance lines; plural transmission zeros; thin profile; Distributed parameter circuits; Filtering theory; Impedance; Insertion loss; Low pass filters; MMICs; Packaging; Power transmission lines; Stripline; Thermal conductivity;
Conference_Titel :
Microwave Symposium Digest, 2002 IEEE MTT-S International
Conference_Location :
Seattle, WA, USA
Print_ISBN :
0-7803-7239-5
DOI :
10.1109/MWSYM.2002.1012167
