Title :
A miniaturized monolithic dual band filter using ceramic lamination technique for dual mode portable telephones
Author :
Miyake, H. ; Kitazawa, S. ; Ishizaki, T. ; Yamada, T. ; Nagatomi, Y.
Author_Institution :
Matsushita Nittoh Electr. Co. Ltd., Kyoto, Japan
Abstract :
A miniaturized monolithic dual band filter is developed for dual mode portable telephones. By using a ceramic lamination technique, a 1 mm-thick 900 MHz filter and a 1.9 GHz filter are fabricated and stacked to be co-fired. The performance degradation due to the thickness and the dual band matching network are discussed. An experimental filter is constructed and shows very good performance.
Keywords :
UHF filters; cellular radio; ceramics; cordless telephone systems; impedance matching; laminates; passive filters; resonator filters; strip line filters; 1 mm; 1.9 GHz; 900 MHz; UHF filters; ceramic lamination technique; co-firing; dual band filter; dual band matching network; dual mode portable telephones; miniaturized monolithic filter; Band pass filters; Ceramics; Dual band; Electrodes; Frequency; Insertion loss; Lamination; Resonator filters; Stripline; Telephony;
Conference_Titel :
Microwave Symposium Digest, 1997., IEEE MTT-S International
Conference_Location :
Denver, CO, USA
Print_ISBN :
0-7803-3814-6
DOI :
10.1109/MWSYM.1997.602908
