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US 6,989,781 B2Granted
Short-range radar system with variable pulse duration
AssigneeRobert Bosch GmbH
InventorDirk Steinbuch
Life of this patent
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Abstract
A short-range radar system includes short-range radar sensor means and means (41) for HF-impulse generator for the sensor means. The means for HF-impulse generation are embodied for emitting impulses with adjustable pulse duration (51, 53).
Claims5
A short-range radar system, comprising:
- short-range radar sensor means,
- means (41) for HF-impulse generation for the sensor means,
- wherein the means for HF-impulse generation emits impulses with adjustable pulse width of a transmitted pulse (51, 53) for operation in a first distance region, and wherein the means for adjustment of the pulse width of the transmitted pulse is embodied such that the pulse width of the transmitted pulse in a second distance region, which is farther away from the short-range radar system than the first distance region, increases with increasing distance, and
- wherein the means for HF-impulse generation has a step recovery diode-pulse generator (41) and means (43, 45, 46) for adjustment of a back-bias voltage.
1 more element
A method for operating a short-range radar sensor having the following steps:
- operating the short-range radar sensor with a substantially fixed HF-impulse width in a first distance region,
- operating the short-range radar sensor with a variable HF-impulse width in a second distance region outside of the first distance region, wherein the HF-impulse width in the second distance region is increased with increasing distance, and
- wherein for the HF-impulse generation, a step recovery diode-pulse generator is used, wherein said step recovery diode-pulse generator is terminated with a low-ohmic resistor, and wherein adjustment of the HF-impulse width takes place by adjustment of a back-bias voltage.
Dependencies are inferred from the claim text.