| US 7,583,950 B2 | ||
| High linearity tunable bandpass filter | ||
| John D. Russell, Rochester, N.Y. (US); and Thomas D. O'Brien, Honeoye Falls, N.Y. (US) | ||
| Assigned to Harris Corporation, Melbourne, Fla. (US) | ||
| Filed on Oct. 05, 2006, as Appl. No. 11/539,048. | ||
| Prior Publication US 2008/0085694 A1, Apr. 10, 2008 | ||
| Int. Cl. H04B 1/16 (2006.01); H04B 1/10 (2006.01) | ||
| U.S. Cl. 455—339 [455/290; 455/307] | 10 Claims |
| 1. A tunable bandpass filter comprising:
an autotransformer to provide impedance step-up at an input of the tunable bandpass filter;
an autotransformer to provide impedance step-down at an output of the tunable bandpass filter;
two or more tuning portions arranged in parallel to one another, each tuning portion being comprised of two or more tuning
elements and at least one GaAs FET switch to switch said two or more tuning elements in and out of the tunable bandpass filter;
at least one inductive element coupling the tuning portions together; and
at least one terminal to receive a control signal to turn the GaAs FET switch on or off.
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