System for monitoring and controlling the power of a radio frequency (RF) signal in a short-range RF transmitter
First Claim
1. A system for monitoring and controlling a radio frequency (RF) signal in a RF transmitter, the RF transmitter comprising a RF signal generation unit for generating the RF signal and a power amplifier for amplifying the RF signal, the system comprising:
- a RF power monitoring unit coupled to an output stage of at least one component of the transmitter, for monitoring a power of the RF signal and for generating at least one alarm signal indicating a condition when the power meets a predetermined alarm criterion; and
a control unit coupled to the RF power monitoring unit for receiving the alarm signal and coupled to a control input of the RF signal generation unit for modifying a frequency of the RF signal in response to the alarm signal.
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Accused Products
Abstract
A system for monitoring and controlling the power of a Radio Frequency (RF) signal in a short-range RF transmitter. An RF signal-generation unit generates the RF signal. A power amplifier amplifies the RF signal. An impedance-matching network matches the output impedance of the power amplifier to input impedance of an antenna. One or more RF power monitors monitor the voltage amplitude of the RF signal at the output of at least one of the RF signal-generation unit, the power amplifier and the impedance-matching network. The one or more RF power monitors further generate at least one alarm signal, based on the voltage amplitude of the RF signal. A control unit modifies at least one operating parameter of at least one of the RF signal-generation unit and the power amplifier, based on the at least one alarm signal generated by the one or more RF power monitors.
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Citations
18 Claims
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1. A system for monitoring and controlling a radio frequency (RF) signal in a RF transmitter, the RF transmitter comprising a RF signal generation unit for generating the RF signal and a power amplifier for amplifying the RF signal, the system comprising:
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a RF power monitoring unit coupled to an output stage of at least one component of the transmitter, for monitoring a power of the RF signal and for generating at least one alarm signal indicating a condition when the power meets a predetermined alarm criterion; and a control unit coupled to the RF power monitoring unit for receiving the alarm signal and coupled to a control input of the RF signal generation unit for modifying a frequency of the RF signal in response to the alarm signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A communication unit, comprising:
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a power amplifier for amplifying a radio frequency (RF) signal; a RF power monitoring unit coupled to an input stage of the power amplifier, for monitoring a power of the RF signal and for generating at least one alarm signal indicating a condition when the power meets a predetermined alarm criterion; and a control unit coupled with to the RF power monitoring unit for receiving the alarm signal and coupled to a control input of the power amplifier for modifying at least one operating parameter of the power amplifier in response to the alarm signal, wherein the control unit is arranged to restart a telegram transmission of the RF signal after modifying the operating parameter. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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Specification