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. 31, 2012
Filed:
Apr. 16, 2009
John D. Russell, Rochester, NY (US);
Thomas D. O'brien, Honeoye Falls, NY (US);
John D. Russell, Rochester, NY (US);
Thomas D. O'Brien, Honeoye Falls, NY (US);
Harris Corporation, Melbourne, FL (US);
Abstract
A tunable bandpass filter () is provided. An RF signal is provided at an input of the tunable bandpass filter, and a level shifted control signal (V, V) inputted to the tunable bandpass filter () switches a first arrangement and a second arrangement of one or more tuning portions (---) in or out of the tunable bandpass filter using a GaAs FET switch. The first arrangement is coupled to the second arrangement using an inductor (). An RF signal having a desired predetermined frequency at an output of the tunable bandpass filter () is produced by the switching. The tuning portions include the GaAs FET switch (), a first capacitor (-) connected at a first signal terminal of the GaAs FET switch and a second capacitor (-) connected between a second signal terminal of the GaAs FET switch and ground. Each of the tuning portions can be arranged in parallel with one another.