Broadband re-configurable RF transmitter
AssigneeHCL Technologies Limited
InventorsRavi Kishore, Kumaralingam Ramamoorthy, Ajeet Pal, Kameswara Rao Balijapalli
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Abstract
An RF transmitter system operating on a broader frequency range and providing a higher output power dynamic range is described. Low power RF signal is produced from a baseband signal using a quadrature modulator and using a broadband local oscillator signal. A microcontroller system controls the RF transmitter by selecting frequency range to be produced by the frequency synthesizer, selecting appropriate amplification path for producing the required output power, controlling the power detection sections for providing precise automatic power and automatic gain control.
Claims46
A re-configurable broadband radio frequency transmitter system operating on a broad frequency range and providing a wide output power dynamic range comprising:
- a quadrature modulator for generating low power RF signal from a baseband signal;
- a broadband local oscillator with multiple frequency selection paths for generating and re-configuring said operating frequency;
- an amplification path selection and digital variable attenuator-DVA setting for reconfiguring to desired output power;
- multiple radio frequency power detection sections for precise detection and generation of desired output power level;
- a radio frequency power detection section for automatic power control and automatic gain control;
- a reference frequency section for providing the reference frequency to frequency synthesizer;
- and
- a microcontroller for receiving sending signals for re-configuring the radio frequency transmitter.
A method for operating on a broad frequency range and providing a wide output power range in an radio frequency transmitter, said method comprising of:
- generating low power radio frequency signal from a baseband signal using a quadrature modulator;
- generating and re-configuring operating frequency using a broadband local oscillator with multiple frequency paths;
- selecting amplification path and digital variable attenuator-DVA setting for reconfiguring RF transmitter to desired output power;
- detecting power and generating desired output power level using multiple RF power detection module;
- providing reference frequency to a frequency synthesizer using a reference frequency section;
- and
- receiving and sending signals for re-configuring and controlling the radio frequency transmitter from a microcontroller.
Dependencies are inferred from the claim text.