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AssigneeThales
InventorsPascal Cornic, Philippe Laviec, Bernard Liabeuf, Francisco Melero
Estimating the term…
The present invention relates to an ultrawideband radar. It also relates to a modulator, in particular for switching microwaves over a very short duration. The radar includes a modulator modulating a carrier microwave, this modulator including: a microwave mixer (21) means for generating a modulation signal (23). The microwave enters on one input of the mixer and the modulation signal (22) on the other input of the mixer, the output signal from the mixer being provided to the transmission means of the radar. Advantageously, the modulation signal may be pulsed and of very short duration. A local oscillator (1), operating as a free oscillator, provides the microwave to be modulated. The invention applies in particular in respect of aiding the parking of motor vehicles. More generally, it applies in respect of all applications which require low-cost high distance resolution radar detection.
A radar comprising a modulator modulating a carrier microwave, this modulator including:
The radar as claimed in any one of the preceding claims, characterized in that it comprises a local oscillator (1), operating as a free oscillator, providing the microwave to be modulated.
The radar as claimed in any one of the preceding claims, characterized in that a transmit antenna (3) is linked to the output of the mixer (21).
The radar as claimed in any one of the preceding claims, characterized in that it comprises a receive antenna (5) linked to the input of at least one microwave mixer (6, 61, 62) whose other input receives the carrier wave, the demodulated signal obtained at the output of the mixer being intended for the processing circuits (23, 72, 73, 74).
The radar as claimed in any one of the preceding claims, characterized in that the means (23) for generating a modulation signal provide several pulses per recurrence period.
The radar as claimed in any one of the preceding claims, characterized in that the means (23) for generating the pulses are a digital circuit moreover comprising the reception signals processing circuits (71, 72, 73, 74).
The radar as claimed in any one of the preceding claims, characterized in that it processes the distance bins in a periodic manner.
The radar as claimed in any one of the preceding claims, characterized in that the antennas (3, 5) each consist of an array of patches.
A microwave modulator, characterized in that it includes at least:
Dependencies are inferred from the claim text.