Filter to suppress harmonics for an antenna
AssigneeStarkey Laboratories, Inc.
InventorStephen Paul Flood
Life of this patent
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Abstract
Disclosed herein, among other things, are systems and methods for filtering to suppress harmonics for a hearing assistance device antenna. One aspect of the present subject matter includes a hearing assistance system for a wearer including a wireless radio frequency (RF) transceiver, an antenna and a filter connected between the RF transceiver and the antenna. According to various embodiments, the filter is configured to suppress harmonics for the antenna, and configured to maintain impedance and prevent inversion of impedance presented to the RF transceiver from the antenna.
Claims20
A hearing assistance device, comprising:
- a microphone;
- a wireless radio frequency (RF) transceiver including antenna match circuitry;
- hearing assistance electronics connected to the microphone and the RF transceiver;
- an antenna;
- and
- a balanced low pass filter connected between the antenna match circuitry of the RF transceiver and the antenna such that the low pass filter does not impede the transceiver's ability to tune the antenna, the filter configured to suppress harmonics and attenuate generated harmonics for the antenna to prevent inversion of impedance and to provide a symmetrical impedance load presented to the RF transceiver from the antenna.
A method, comprising:
- providing a balanced low pass filter connected between antenna match circuitry of an RF transceiver and an antenna of a hearing assistance device including a microphone and hearing assistance electronics connected to the microphone and the RF transceiver, the filter configured to suppress harmonics and attenuate generated harmonics for the antenna to prevent inversion of impedance and to provide a symmetrical impedance load presented to the RF transceiver from the antenna, wherein the filter does not impede the transceiver's ability to tune the antenna.
Dependencies are inferred from the claim text.