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:
Jul. 04, 2006
Filed:
Nov. 23, 2004
Ramon A. Gomez, San Juan Capistrano, CA (US);
Lawrence M. Burns, Laguna Hills, CA (US);
Sung-hsien Chang, Irvine, CA (US);
Carl W. Pobanz, Topanga, CA (US);
Ramon A. Gomez, San Juan Capistrano, CA (US);
Lawrence M. Burns, Laguna Hills, CA (US);
Sung-Hsien Chang, Irvine, CA (US);
Carl W. Pobanz, Topanga, CA (US);
Broadcom Corporation, Irvine, CA (US);
Abstract
A printed bandpass filter is mounted on a precision substrate to eliminate the need for post-fabrication tuning. The filter input is capacitively coupled to a series of quarter wavelength resonators and the filter output. The quarter wavelength resonators are printed as spirals to reduce filter size. The resonators define the bandpass characteristics of the filter. The filter also weakly couples the input signal to the filter output in a manner to cancel the signal image. Mechanical clips mitigate thermal stress on solder connections when the precision substrate is mounted on a second printed circuit board.