Wave transmission lines and networks – Plural channel systems – Having branched circuits
Reexamination Certificate
2005-05-24
2005-05-24
Lee, Benny (Department: 2817)
Wave transmission lines and networks
Plural channel systems
Having branched circuits
C333S219100, C333S202000
Reexamination Certificate
active
06897741
ABSTRACT:
A small dielectric duplexer using a small TM mode dielectric resonator having a low loss is formed. On the transmission side thereof, TM double mode dielectric resonators and a TM triple mode dielectric resonator are arranged in a line so that their opening surfaces face the same direction. On the receiving side thereof, TM single mode dielectric resonators and a TM triple mode dielectric resonator are also arranged in the same direction in a similar manner as the transmission side. The external dimensions of the plurality of these dielectric resonators are made uniform by selecting a dielectric having a dielectric constant according to the degree of multiplexing. The opening surfaces of the cavities are covered by a panel having input/output terminals, an antenna connection terminal and input/output loops and by a panel having coupling loops. In this manner, a small dielectric duplexer with uniform external dimensions and a low loss is formed.
REFERENCES:
patent: 5638037 (1997-06-01), Kurisu et al.
patent: 5783979 (1998-07-01), Andoh et al.
patent: 5831496 (1998-11-01), Sonoda et al.
patent: 5898349 (1999-04-01), Hattori et al.
patent: 6072378 (2000-06-01), Kurisu et al.
patent: 1269913 (2000-10-01), None
patent: 05-121904 (1993-05-01), None
patent: 07-226608 (1995-08-01), None
patent: 11-145704 (1999-05-01), None
patent: 11274811 (1999-10-01), None
patent: 2000-022405 (2000-01-01), None
patent: 2000-68708 (2000-03-01), None
patent: 2001-144504 (2001-05-01), None
patent: WO 9912224 (1999-03-01), None
Ji-Fuh Liang, et al., “Mixed Modes Dielectric Resonator Filters”, IEEE Translation on Microwave Theory and Techniques, IEEE Inc. , New York, vol. 442, No. 12 (Dec. 1994).
Ji-Fuh Liang, et al., “Mixed Modes Dielectric Resonator Loaded Cavity Filters,” IEEE MTT-S International Microwave Symposium Digest, San Diego, IEEE, vol. 2, May (1994).
European Search Report dated Jul. 28, 2003.
Chinese Office Action issued Apr. 2, 2004.
Japanese Examination Report issued Jun. 8, 2004 (w/ English translation of relevant portions).
Ando Masamichi
Kubo Hiroyuki
Dickstein , Shapiro, Morin & Oshinsky, LLP
Lee Benny
Murata Manufacturing Co. Ltd
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