Radio frequency communication devices and methods
AssigneeInfineon Technologies AG
InventorsMikael Bergholz Knudsen, Peter Bundgaard, Jan-Erik Mueller
Life of this patent
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Abstract
One embodiment relates to a radio frequency (RF) communication device. The RF communication device includes an antenna interface coupled to an antenna that exhibits a time-varying impedance. The RF communication device also includes a test interface coupled to RF test equipment that exhibits a test impedance. A tuning circuit in the RF communications device selectively provides a matched impedance to either the time-varying impedance or the test impedance based on feedback derived from the test interface. Other methods and systems are also disclosed.
Claims25
A radio frequency (RF) communication device, comprising:
- an antenna interface adapted to be coupled to an antenna that exhibits a time-varying impedance;
- a test interface adapted to be coupled to RF test equipment that exhibits a test impedance;
- and
- a tuning circuit adapted to selectively provide a matched impedance to either the time-varying impedance or the test impedance based on feedback derived from the test interface.
A radio frequency (RF) communication device comprising:
- an antenna interface associated with a tuning circuit that is adapted to provide a time-varying impedance that is matched to an antenna;
- a test interface associated with a fixed test impedance that is matched to RF test equipment;
- and
- a test switch that selectively couples the tuning circuit or the test impedance to a transmission and reception node based on feedback derived from the test interface.
A method of testing a radio frequency (RF) communication device, comprising:
- monitoring a test interface of the RF communication device for a condition;
- providing a test impedance at the t interface while the condition is met;
- and
- providing a time-varying impedance at an antenna interface to match a time-varying impedance at an antenna if the condition is not met.
A method of testing a radio frequency (RF) communication device, comprising:
- monitoring a test interface of the RF communication device to determine whether a test cable is detected;
- and
- transmitting data while providing a time-varying impedance at an antenna interface if the test cable is not detected, where the time-varying impedance of the antenna interface is matched to a time-varying impedance at an antenna coupled to the antenna interface.
A radio frequency (RF) communication device, comprising:
- antenna interface means for coupling to an antenna that exhibits a time-varying impedance;
- test interface means for coupling to RF test equipment that exhibits a test impedance;
- and
- tuning means for selectively providing a matched impedance to either the time-varying impedance or the test impedance based on feedback derived from the test interface means.
Dependencies are inferred from the claim text.