Radar transmit bandwidth augmentation
| DWPI Title: Radar system for emitting very high instantaneous bandwidth (IBW) radar signal, has second path of first transmit channel that has second mixer adapted to mix second analog intermediate frequency (IF) signal with second LO 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 e.g. synthetic aperture radar (SAR) system for airborne vehicle. Can also be used in imaging, weather, autonomous vehicle (AV) navigation etc. |
| Advantage: The radar system can generate data with higher range resolution compared to results that can be generated by conventional radar systems based upon the very high instantaneous bandwidth (IBW) radar signal. |
| Novelty: The system (100) has a first path of a first transmit channel (102) including a first local oscillator (LO) adapted to generate a first LO signal. A second path of the first channel has a first attenuator and a first phase shifter adapted to operate in conjunction to form a first modified analog signal, where a radar signal is based upon a first radio frequency (RF) signal (106), the first modified signal, a second analog RF signal, and a second modified signal. The system combines the first RF signal with the first signal and combines the second RF signal and the second signal. The radar system is adapted to implement a synthetic aperture radar (SAR) function. |
| Filed: 7/1/2024 |
| Application Number: US18760319A |
| Tech ID: SD 15166.1 |
| 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. |
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