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:
Sep. 22, 1998
Filed:
Apr. 28, 1995
Anthony J Estrada, San Diego, CA (US);
Qualcomm Incorporated, San Diego, CA (US);
Abstract
A filter comprising a plurality resonator stages between sequentially coupled between input and output ports. The resonator stages are arranged such that at least one non-sequential pair of stages are physically adjacent. The non-sequential pair of resonator stages are separated by a common internal wall, which defines a bypass coupling aperture therebetween. During operation of the filter, attenuation poles are formed in the filter response due to bypass coupling between the non-sequential pair of resonator stages through the bypass coupling aperture. The preferred U-shaped arrangement of the resonator stages enables the formation of attenuation poles, without using an external bypass connection, by permitting inductive or capacitive bypass coupling through the bypass aperture.