Title :
Design of bandpass ceramic filter with double-mode resonator
Author :
Wu, Long ; Lee, Yi-Yeh ; Liang, Chich-Kwo
Author_Institution :
Dept. of Electr. Eng., Nat. Cheng-Kung Univ., Tainan, Taiwan
fDate :
9/1/1989 12:00:00 AM
Abstract :
The design of a bandpass ceramic filter using a double-mode resonator vibrating in trapped energy modes is presented. The filter characteristics are related to the dimensions of the piezoelectric ceramic plate and electrode, the spacing between two electrode pairs, and the mass loading effect of the electrode. On the basis of a systematic investigation of theories and experiments, the optimal configuration of the device is determined. The designed ceramic filter exhibits a center frequency of 10.7 MHz, a 3-dB bandwidth of about 150-350 kHz, insertion loss close to 0 dB, spurious response larger than 35 dB, and temperature stability within 30 p.p.m./°C
Keywords :
band-pass filters; crystal filters; 0 dB; 10.7 MHz; 150 to 350 KHz; bandpass ceramic filter; bandwidth; center frequency; ceramic plate dimensions; double-mode resonator; electrode pairs; electrode spacing; filter characteristics; insertion loss; mass loading effect; optimal configuration; piezoelectric ceramic plate; spurious response; temperature stability; trapped energy modes; Band pass filters; Bandwidth; Ceramics; Costs; Electrodes; Frequency; Piezoelectric materials; Resonator filters; Temperature; Vibrations;
Journal_Title :
Components, Hybrids, and Manufacturing Technology, IEEE Transactions on
