Dielectric filter having input/output electrodes connected to el

Wave transmission lines and networks – Plural channel systems – Having branched circuits

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33135, 33208, 33212, H01P 1213, H01P 120

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061338087

ABSTRACT:
The invention provides a dielectric filter and a dielectric duplexer each having a high degree of freedom in terms of the direction and position of a lead electrode and having a high mutual bonding strength among resonators against bending stress. At both ends of an insulating substrate, lead electrodes are formed. TE-mode dielectric resonators are connected in series with electrically conductive adhesive such as solder and are secured to the substrate again with electrically conductive adhesive. A respective input and output electrode of each of the resonators is connected to a corresponding lead electrode on the substrate with electrically conductive adhesive. The lead electrodes can be routed in any way on the surface of the substrate, and thereby the lead directions and the lead positions can freely be changed.

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patent: 6002306 (1999-12-01), Arakawa
patent: 6002307 (1999-12-01), Arakawa
patent: 6020800 (2000-02-01), Arakawa et al.
"Spurious Free D.R. Te Mode Band Pass Filter" Abdelmonem A. et al., IEEE MTT-S International Microwave Symposium Digest, San Diego, May 23-27, 1994, vol. 2, May 23, 1994, Kuno H. J. & Wen C.P. (Editors), pp. 735, right-hand column, line 10-line 17, figure 1.
"Novel Dielectric Waveguide Components-Microwave Applications of New Ceramic Materials" Yoshihiro Konishi, Proceedings of the IEEE, vol. 97, No. 6, Jun. 1, 1991, pp. 726-740, XP000262350, figures 11, 13 and 31.
Patent Abstracts of Japan, vol. 11, No. 195 (E-518), Jun. 23, 1987 & JP 62 023204 A (Oki Electric Ind. Co. Ltd.), Jan. 31, 1987, abstract.
European Search Report dated May 25, 1998.

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