Micro-radar, micro-radar sensor nodes, networks and systems
First Claim
1. An apparatus, comprising:
- a micro-radar adapted to generate an antenna output of less than or equal to 10 milli-Watt (mW) through an antenna to an object and receive a Radio Frequency (RF) reflection off of said object, and adapted to respond to a first Digital to Analog Converter (DAC) output and a second DAC output, comprising;
a timing generator adapted to generate a transmit signal with a first edge in response to said first DAC output and a system clock; and
said timing generator adapted to generate a reception signal with a second edge in response to said second DAC and said system clock, where said second edge has a delay from said first edge that sweeps through a short delay to a long delay over a time interval;
said micro-radar generates a transmit RF burst in response to said first edge of said transmit signal for delivery to said antenna to generate said antenna output in response to said transmit pulse;
said micro-radar mixes a received RF reflection of said RF reflection and said transmit RF burst, in response to said second edge of said reception signal, to generate an Intermediate Frequency (IF) signal with a peak amplitude at a sweep delay Tm for a distance T0 of said object from said antenna; and
a frequency of said IF signal is one over a compression ratio multiplied by a carrier frequency of said antenna output, where said compression ratio is about one million.
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Accused Products
Abstract
A micro-radar is disclosed that is operated based upon two Digital to Analog Converter (DAC) outputs that control its internal timing and Intermediate Frequency (IF) signal frequency. Calibration and temperature compensation is done through estimating the duty cycle of the transmit signal and possibly the reception signal that stimulate a pulse generator to create the transmit pulse and the reception pulse and adjusting one or both DAC outputs. Sensor processors, wireless sensor nodes and wireline sensor nodes are disclosed for operating the micro-radar. An integrated circuit is disclosed implementing all or portions of the micro-radar. Access points, servers as well as systems that include but are not limited to a traffic monitoring system, a traffic control system, a parking management system and/or a production management system are also disclosed.
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Citations
20 Claims
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1. An apparatus, comprising:
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a micro-radar adapted to generate an antenna output of less than or equal to 10 milli-Watt (mW) through an antenna to an object and receive a Radio Frequency (RF) reflection off of said object, and adapted to respond to a first Digital to Analog Converter (DAC) output and a second DAC output, comprising; a timing generator adapted to generate a transmit signal with a first edge in response to said first DAC output and a system clock; and said timing generator adapted to generate a reception signal with a second edge in response to said second DAC and said system clock, where said second edge has a delay from said first edge that sweeps through a short delay to a long delay over a time interval; said micro-radar generates a transmit RF burst in response to said first edge of said transmit signal for delivery to said antenna to generate said antenna output in response to said transmit pulse; said micro-radar mixes a received RF reflection of said RF reflection and said transmit RF burst, in response to said second edge of said reception signal, to generate an Intermediate Frequency (IF) signal with a peak amplitude at a sweep delay Tm for a distance T0 of said object from said antenna; and a frequency of said IF signal is one over a compression ratio multiplied by a carrier frequency of said antenna output, where said compression ratio is about one million. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A method, comprising the step of:
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operating a micro-radar transmitting an antenna output through an antenna to an object and receiving a Radio Frequency (RF) reflection off of said object, further comprising the steps of; responding to a first Digital to Analog Converter (DAC) output to generate a transmit signal with a first edge and a duty cycle; responding to a second DAC output to generate a reception signal with a second edge at a delay from said transmit first edge, where said delay sweeps through a short delay to a long delay over a time interval; operating a RF transceiver/mixer (RFTM) to generate a transmit RF burst in response to said first edge of said transmit signal; generating a reception pulse in response to said second edge of said reception signal; and operating said RFTM to mix said transmit RF burst and a received RF reflection in response to said reception pulse to generate an Intermediate Frequency (IF) signal with a peak amplitude at a sweep delay Tm for a distance T0 of said object from said antenna. - View Dependent Claims (20)
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Specification