Back to results
US 7,116,954 B2Granted
Tunable bandpass filter and method thereof
AssigneeKyocera Wireless Corp.
InventorStanley S. Toncich
Life of this patent
Estimating the term…
Abstract
The present invention provides a tunable bandpass filter and method thereof. In a preferred embodiment, the tunable bandpass filter uses variable ferro-electric capacitors to adjust both the passband and the notch across the normal operating range of a wireless communications device. The tunable bandpass filter is capable of providing a tuning range over a desired frequency range with low I.L. and high out-of-band rejections.
Claims9
A tunable bandpass filter comprising:
- a first resonator;
- a capacitive component connected to the first resonator, wherein the capacitive component causes a notch in a frequency response of the tunable bandpass filter, and wherein the capacitive component has variable capacitance;
- a second resonator connected to the capacitive component;
- a first variable capacitive block comprising a first variable ferro-electric capacitor, the first variable capacitive block connected to the first resonator;
- a second variable capacitive block comprising a second variable ferro-electric capacitor, the second variable capacitive block connected to the second resonator;
- and,
- a control circuit connected to the first variable capacitive block, the second variable capacitive block, and the capacitive component, wherein the control circuit is configured to tune a passband and to vary the notch of the tunable bandpass filter.
4 more elements
Dependencies are inferred from the claim text.