DocumentCode :
1635453
Title :
New approach for configuring a parallel-planar dual-band bandpass filter by employing multilayered LTCC technologies
Author :
Takagi, Yuta ; Satoh, Kei ; Narahashi, Shoichi
Author_Institution :
NTT DOCOMO Inc., Yokosuka, Japan
fYear :
2012
Firstpage :
147
Lastpage :
150
Abstract :
This paper describes a new approach for configuring a parallel-planar dual-band bandpass filter (DBPF) by employing multilayered low temperature co-fired ceramic (LTCC) technologies. This approach achieves the required frequency responses for the parallel-planar DBPF while retaining flexibility in selecting two center passband frequencies without the need for precise alignment between resonators in the filter packaging, which was required in a previously proposed parallel-planar DBPF. A cavity is implemented in the LTCC to avoid degradation in the unloaded Q-factors of the resonators. Evaluation results based on the frequency responses of 90 fabricated samples using a 0.8-/2.3-GHz band BPF show that there is only a slight deviation in the frequency responses of the parallel-planar DBPF.
Keywords :
band-pass filters; cavity resonator filters; ceramic packaging; cavity; center passband frequencies; filter packaging; frequency 0.8 GHz; frequency 2.3 GHz; frequency responses; low temperature co-fired ceramic technologies; multilayered LTCC technologies; parallel-planar dual-band bandpass filter; resonator Q-factors; Band pass filters; Couplings; Dual band; Frequency measurement; Passband; Q factor; Resonant frequency; Bandpass filters; dual-band; low temperature co-fired ceramic (LTCC); resonator filters;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Radio and Wireless Symposium (RWS), 2012 IEEE
Conference_Location :
Santa Clara, CA
ISSN :
2164-2958
Print_ISBN :
978-1-4577-1153-4
Type :
conf
DOI :
10.1109/RWS.2012.6175396
Filename :
6175396
Link To Document :
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