Radar transmit bandwidth augmentation
| DWPI Title: Radar system for forming a very high instantaneous bandwidth radar signal on the basis of multiple radio frequency signals used in a variety of applications such as imaging, comprises digital signal generator, which generates first digital signal |
| Abstract: Various technologies pertaining to forming a very high instantaneous bandwidth (IBW) radar signal based upon several radio frequency (RF) signals that have sub-bands of the frequency band of the radar signal are described herein. A radar system is configured to address local oscillator leakage across multiple transmit channels of the radar system, such that the radar signal has a relatively constant or other desired amplitude and phase across frequencies of the radar signal. In addition, the radar system is configured to compute a correction signal that pre-distorts each of the sub-frequency channels such that upon combining enables the generation of desired amplitude and phase response across a transmitted pulse. |
| Use: Radar system for forming a very high instantaneous bandwidth radar signal on the basis of multiple radio frequency signals used in a variety of applications such as imaging, weather, autonomous vehicle navigation, etc. |
| Advantage: Radar system ensures to generate data with higher range resolution compared to results that is generated by conventional radar systems. The feed forward loop is connected to the output of the transmit channel, and phase of the local oscillator (LO) in the feed forward loop is adjusted until the system LO leakage is minimized. |
| Novelty: The radar system (100) comprises a first transmit channel (102), which includes a first mixer to output a first analog radio frequency (RF) signal (106) with a first RF band. A first local oscillator (LO) is adapted to generate a LO first frequency. A first digital signal is generated by a digital signal generator. A second transmit channel includes a second mixer that outputs a second analog RF signal with a second RF band. A second LO is adapted to generate a second LO frequency different from the first LO frequency. A second digital signal is generated by the digital signal generator. The digital signal generator is adapted to control the amplitudes and shifts phases of the first digital signal and the second digital signal based upon a computed system LO leakage. |
| Filed: 11/9/2021 |
| Application Number: US17522385A |
| Tech ID: SD 15166.0 |
| This invention was made with Government support under Contract No. DE-NA0003525 awarded by the United States Department of Energy/National Nuclear Security Administration. The Government has certain rights in the invention. |
| Data from Derwent World Patents Index, provided by Clarivate All rights reserved. Republication or redistribution of Clarivate content, including by framing or similar means, is prohibited without the prior written consent of Clarivate. Clarivate and its logo, as well as all other trademarks used herein are trademarks of their respective owners and used under license. |