Receiver with programmable gain for UWB radar

摘要

A receiver for an ultra wideband (UWB) pulse radar system includes a programmable gain network (PGN) block coupled to process a received UWB radar signal. The programmable PGN block includes programmable attenuator having an output coupled to an input node of a UWB low noise amplifier (LNA), and a fast acting power limiter is between the input node and a system ground and/or a power supply node for the radar system. A sampling unit is coupled between an output of the LNA and a processor. The processor implements an attenuation algorithm, wherein the processor is coupled to the programmable attenuator, and provides attenuation control signals to dynamically control a gain or attenuation of the programmable attenuator, such as based on a distance from a transmitting antenna to the product material.

主权项

1. A receiver for an ultra wideband (UWB) pulse radar system, comprising:
a programmable gain network (PGN) block coupled to process a received UWB radar signal, said programmable PGN block including a programmable attenuator having an output coupled to an input node of a UWB low noise amplifier (LNA), and at least one power limiter between said input node and a ground node for said radar system or a positive supply node for said radar system, and a sampling unit coupled between an output of said LNA and a processor, said processor implementing an attenuation algorithm, wherein said processor is coupled to said programmable attenuator and provides attenuation control signals to dynamically control an attenuation of said programmable attenuator.