The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 19, 2010
Filed:
Oct. 04, 2007
Yun Hee Cho, Gyunggi-do, KR;
Yun Hwi Park, Gyunggi-do, KR;
Yun Hee Cho, Gyunggi-do, KR;
Yun Hwi Park, Gyunggi-do, KR;
Samsung Electro-Mechanics Co., Ltd., Gyunggi-Do, KR;
Abstract
There is provided a multi-layered band pass filter capable of improving a stop characteristic out of a pass band and reducing the entire size of the filter. The multi-layered band pass filter includes a ceramic laminated body having at least first to fifth dielectric layers laminated sequentially therein; first and second resonators having symmetrical patterns of first and second inductors formed on the first dielectric layer, and symmetrical patterns of first and second capacitors formed on the second dielectric layer so that they are at least partially overlapped with the patterns of the first and second inductors; a pattern of first and second load capacitors electrically capacitively coupled respectively to ends of the first and second resonators formed on the third dielectric layer; a pattern of first and second notching capacitors electrically capacitively coupled respectively to the other ends of the first and second resonators formed on the third dielectric layer; and first and second ground planes formed respectively on the fourth and fifth dielectric layers, wherein each of the patterns of the first and second inductors is composed of a low impedance portion formed of wide-width lines and a high impedance portion formed of meander-type narrow-width lines from the low impedance portion.