Self-Compensation of Alignment Tolerances for Series Capacitors in LTCC Filters with Stepped Impedance Resonators
Konferenz: GeMIC 2008 - German Microwave Conference
10.03.2008 - 12.03.2008 in Hamburg-Harburg, Germany
Tagungsband: GeMIC 2008
Seiten: 4Sprache: EnglischTyp: PDFPersönliche VDE-Mitglieder erhalten auf diesen Artikel 10% Rabatt
Höft, Michael (Panasonic Electronic Devices Europe GmbH, Zeppelinstr. 19, D-21337 Lueneburg, Germany)
Tamura, Masaya; Ishizaki, Toshio (2Panasonic Electronic Devices Co., Lt; 1006 Kadoma, Kadoma City, Osaka 571-8506, Japan)
In this paper a new self-compensation technique for series capacitors in LTCC (low temperature co-fired ceramic) filters is presented. The series capacitor is required for controlling coupling and transmission zero of the SIR (stepped impedance resonators) filter setup. The capacitor is realized by electrodes placed on two layers of the laminated multi-layer setup. Due to manufacturing tolerances in the layer alignment process, deviations are caused in the desired value of the series capacitor, which might deteriorate the filter performance. By proper shaping of the series capacitor electrodes in the connection region between the SIR, a selfcompensation of these alignment tolerances can be achieved.