| US 7,612,637 B2 | ||
| Built-in cross-coupled dielectric filter | ||
| Yuqing Zhao, Zhangjiagang (China) | ||
| Assigned to Caiqin Electronics Elements Co., Ltd., Jiangsu (China) | ||
| Filed on Jul. 03, 2007, as Appl. No. 11/822,233. | ||
| Claims priority of application No. 2006 1 0041057 (CN), filed on Jul. 21, 2006. | ||
| Prior Publication US 2008/0018418 A1, Jan. 24, 2008 | ||
| Int. Cl. H01P 1/205 (2006.01); H01P 7/04 (2006.01) | ||
| U.S. Cl. 333—206 [333/207; 333/222; 333/223] | 2 Claims |
| 1. A built-in cross-coupled dielectric filter comprising:
at least three sequentially welded coaxial dielectric resonators;
mutually coupled capacitors or mutually coupled inductors etched on pairs of opposing lateral surfaces of adjacent coaxial
dielectric resonators such that consecutive pairs of opposing lateral surfaces of adjacent coaxial dielectric resonators have
mutually coupled inductors and mutually coupled capacitors etched thereon in an alternating manner; and
an input port and an output port of the built-in cross-coupled dielectric filter are positioned at a first coaxial dielectric
resonator and a last coaxial dielectric resonator, respectively,
wherein the mutually coupled capacitors are formed by etching mutually-matched open-loop grooves on the opposing lateral surfaces
of the adjacent coaxial dielectric resonators, and the mutually coupled inductors are formed by etching mutually-matched straight-line
grooves on the opposing lateral surfaces of the adjacent coaxial dielectric resonators.
|