A method for operating a stepped frequency radar system is disclosed. The method involves performing stepped frequency scanning across a first frequency range using frequency steps of a first step size, the stepped frequency scanning performed using at least one transmit antenna and a two-dimensional array of receive antennas, changing from the first step size to a second step size, wherein the second step size is different from the first step size, and performing stepped frequency scanning across a second frequency range using the at least one transmit antenna and the two-dimensional array of receive antennas and using frequency steps of the second step size.

Operating a stepped frequency radar system involves performing stepped frequency scanning across a frequency range using at least one transmit antenna and a two-dimensional array of receive antennas and using frequency steps of a fixed step size, processing a first portion of digital data that is generated from the stepped frequency scanning to produce a first digital output, wherein the first portion of the digital data is derived from frequency pulses that are separated by a first step size that is a multiple of the fixed step size, and processing a second portion of digital data that is generated from the stepped frequency scanning to produce a second digital output, wherein the second portion of the digital data is derived from frequency pulses that are separated by a second step size that is a multiple of the fixed step size, wherein the first multiple is different from the second multiple.

A radar detection system that estimates the received pulse frequency of a pulse in a received radar signal using a signal transmit frequency or one that uses frequency agility during a pulse duration. The radar detector system may include a radar detector that receives the radar signal from an antenna or antenna array. The receiver may be channelized, and each channel path may include Gaussian bandpass filter(s) centered at a different frequencies. The system includes an extended range radar detector that receives the signal in the channels and processing logic that processes the detected channel signals to identify the pulse frequency of emitters with or without frequency agility during a pulse duration. The frequency estimates of the pulse are based on calibrated amplitude differences in adjacent channels.

A radar detection system that estimates the received pulse frequency of a pulse in a received radar signal using a signal transmit frequency or one that uses frequency agility during a pulse duration. The radar detector system may include a radar detector that receives the radar signal from an antenna or antenna array. The receiver may be channelized, and each channel path may include Gaussian bandpass filter(s) centered at a different frequencies. The system includes an extended range radar detector that receives the signal in the channels and processing logic that processes the detected channel signals to identify the pulse frequency of emitters with or without frequency agility during a pulse duration. The frequency estimates of the pulse are based on calibrated amplitude differences in adjacent channels.

A radar, flying device including such a radar, processing method in a radar embedded in a flying device and associated computer program are disclosed. In one aspect, the radar includes a transceiver antenna including a plurality of radiating elements configured to transmit and receive an electromagnetic wave. The radar includes an antenna gain control unit, by activating/inhibiting radiating elements, in transmission and/or reception configured to keep the reception level of an electromagnetic wave below a determined threshold below the saturation zone of the antenna, as well as by activating/inhibiting radiating elements in reception, configured to compensate the amplitude variation of the ground/sea clutter, over the duration of the reception.

A radar, flying device including such a radar, processing method in a radar embedded in a flying device and associated computer program are disclosed. In one aspect, the radar includes a transceiver antenna including a plurality of radiating elements configured to transmit and receive an electromagnetic wave. The radar includes an antenna gain control unit, by activating/inhibiting radiating elements, in transmission and/or reception configured to keep the reception level of an electromagnetic wave below a determined threshold below the saturation zone of the antenna, as well as by activating/inhibiting radiating elements in reception, configured to compensate the amplitude variation of the ground/sea clutter, over the duration of the reception.

A radar device (1) includes a frequency conversion part (12) which converts a frequency of an echo signal obtained by reflecting a detection signal and receiving the reflected detection signal by an antenna (10), and amplifies a signal level thereof. The radar device (1) includes a path switching part (20) which outputs, as a calibration signal, to the frequency conversion part (12), the transmission signal output by the transmission signal generation part (11) at a timing while the transmission signal is output to the antenna (10). A gain adjustment part (23) changes an amplification gain of the frequency conversion part (12) on the basis of a signal level of the calibration signal input to the frequency conversion part (12) and a signal level of the calibration signal having been amplified by the frequency conversion part (12).

A radar device (1) includes a frequency conversion part (12) which converts a frequency of an echo signal obtained by reflecting a detection signal and receiving the reflected detection signal by an antenna (10), and amplifies a signal level thereof. The radar device (1) includes a path switching part (20) which outputs, as a calibration signal, to the frequency conversion part (12), the transmission signal output by the transmission signal generation part (11) at a timing while the transmission signal is output to the antenna (10). A gain adjustment part (23) changes an amplification gain of the frequency conversion part (12) on the basis of a signal level of the calibration signal input to the frequency conversion part (12) and a signal level of the calibration signal having been amplified by the frequency conversion part (12).

Methods and systems for monitoring a health parameter in a person using a radar system are disclosed. A method involves performing stepped frequency scanning below the skin surface of a person using at least one transmit antenna and a two-dimensional array of receive antennas, the stepped frequency scanning being performed using frequency steps of a first step size, changing the first step size to a second different step size in response to a change in reflectivity of blood in a blood vessel of the person, performing stepped frequency scanning below the skin surface of the person using the second step size after the step size is changed from the first step size to the second step size, and outputting a signal that corresponds to a blood pressure level in the person in response to the stepped frequency scanning at the first step size and at the second step size.

A voltage generator supplies a voltage to an electronic device of a Light Detection and Ranging (LiDAR) system. The voltage generator includes a clock source configured to generate a clock signal and a voltage source configured to generate a first voltage signal having a first voltage level. The voltage generator also includes a voltage multiplier coupled to the voltage source and the clock source. The voltage multiplier is configured to generate a second voltage signal having a second voltage level based on the first voltage signal and the clock signal. The second voltage level is higher than the first voltage level.