US 12,436,258 B2
Radar measuring device and method with dual radar signal generation
Etienne Antide, Grenoble (FR); Mykhailo Zarudniev, Grenoble (FR); and David Lachartre, Grenoble (FR)
Assigned to COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES, Paris (FR)
Filed by COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES, Paris (FR)
Filed on Jul. 21, 2022, as Appl. No. 17/870,166.
Claims priority of application No. 21 08255 (FR), filed on Jul. 29, 2021.
Prior Publication US 2023/0082258 A1, Mar. 16, 2023
Int. Cl. G01S 13/34 (2006.01); G01S 7/35 (2006.01)
CPC G01S 13/348 (2013.01) [G01S 7/354 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A radar measuring device, comprising:
a first generator of a first periodic radar signal whose frequency varies linearly, over at least one portion Tramp of a period, in a frequency band;
a transmit antenna coupled to an output of the first generator and configured to transmit the first radar signal;
a second generator of a second periodic radar signal (1) whose frequency varies linearly, over said portion Trampof the period, in the frequency band, (2) which is generated with a constant phase or a same start-up phase as the first radar signal, and (3) has, relative to the first radar signal, a configurable delay τmix;
a receive antenna configured to receive at least one echo of the first radar signal; and
a mixer comprising a first input coupled to the receive antenna and a second input coupled to an output of the second generator, wherein:
the first generator includes a first polar modulator configured to receive, on a first input, a first periodic signal to be frequency modulated, receive, on a second input, a first control signal comprising a digital sequence of frequency samples, receive, on a third input, a clock signal, and perform a modulation of the first periodic signal by the first control signal at a frequency of the clock signal; and
the second generator includes a second polar modulator configured to receive, on a first input, the first periodic signal to be frequency modulated, receive, on a second input, a second control signal comprising said digital sequence of frequency samples delayed by the configurable delay τmix, which is equal to an integer number of periods of the clock signal, receive, on a third input, the clock signal, and perform a modulation of the first periodic signal by the second control signal at the frequency of the clock signal.