Receiver control in a communication device by antenna de-tuning in strong signal conditions, and method therefor
First Claim
1. A communication device comprising:
- an antenna for receiving a signal;
a receiver circuit having an input coupled to the antenna and an output, the receiver circuit demodulating the signal which is received by the antenna and having a signal strength measuring circuit for generating a signal strength indicator signal representing a strength of the signal received by the antenna;
a controller coupled to the receiver circuit for receiving as input the signal strength indicator signal and generating a tuning signal in response thereto; and
an antenna tuning circuit coupled to the controller and responsive to the tuning signal for tuning the antenna to a reduced gain level when the strength of the signal received by the antenna is indicative of strong signal conditions, wherein the controller comprises a micro-controller having a memory for storing a table of tuning signal voltages for tuning the antenna to a range of gain values at a given operating frequency dependent on the signal strength of the signal received by the antenna.
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0 Petitions
Accused Products
Abstract
A communication device (100) including an antenna (110) for receiving a signal. A receiver circuit (12) is coupled to the antenna (110) and demodulates the signal which is received by the antenna (110). A signal strength measuring circuit (126) is coupled to the antenna (110) and generates a signal strength indicator signal representing a strength of the signal received by the antenna (110). A controller (130) is coupled to the receiver circuit (120) for receiving the signal strength indicator signal and generating a tuning signal in response thereto. An antenna tuning circuit (140) is coupled to the controller (130) and is responsive to the tuning signal for tuning the antenna (110) to a reduced gain level when the strength of the signal received by the antenna (110) is indicative of strong signal conditions.
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Citations
9 Claims
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1. A communication device comprising:
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an antenna for receiving a signal; a receiver circuit having an input coupled to the antenna and an output, the receiver circuit demodulating the signal which is received by the antenna and having a signal strength measuring circuit for generating a signal strength indicator signal representing a strength of the signal received by the antenna; a controller coupled to the receiver circuit for receiving as input the signal strength indicator signal and generating a tuning signal in response thereto; and an antenna tuning circuit coupled to the controller and responsive to the tuning signal for tuning the antenna to a reduced gain level when the strength of the signal received by the antenna is indicative of strong signal conditions, wherein the controller comprises a micro-controller having a memory for storing a table of tuning signal voltages for tuning the antenna to a range of gain values at a given operating frequency dependent on the signal strength of the signal received by the antenna. - View Dependent Claims (2, 3, 4, 5)
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6. A method for tuning an antenna in a communication device comprising steps of:
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receiving a signal; measuring a strength of the signal that is received and generating a signal strength indicator signal representative thereof; determining whether the strength of the signal is indicative of a strong signal condition; and tuning an antenna in the communication device so as to reduce a gain of the antenna when it is determined that the strength of the signal is indicative of a strong signal condition, wherein the step of tuning further comprises retrieving a voltage for a tuning signal from a stored table of tuning signal voltages which are designed to tune the antenna to a range of gain values at any given operating frequency dependent on the strength of the signal received by the antenna. - View Dependent Claims (7, 8)
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9. In combination, an antenna for receiving a signal;
- a receiver circuit coupled to the antenna for demodulating the signal which is received by the antenna and generating a signal strength indicator signal representing a strength of the signal received by the antenna;
a controller coupled to the receiver circuit for receiving as input the signal strength indicator signal and generating a tuning signal in response thereto; and
an antenna tuning circuit coupled to the controller and responsive to the tuning signal for tuning the antenna to a reduced gain level when the strength of the signal received by the antenna is indicative of strong signal conditions, wherein the controller uses a memory for storing a table of tuning signal voltages for tuning the antenna to a range of gain values at a given operating frequency dependent on the signal strength of the signal received by the antenna.
- a receiver circuit coupled to the antenna for demodulating the signal which is received by the antenna and generating a signal strength indicator signal representing a strength of the signal received by the antenna;
Specification