Synthetic aperture radar system and methods
A compact synthetic aperture radar system and associated methods are disclosed.
1. An apparatus for acquiring and processing radar data, the apparatus comprising:
a radar antenna comprising a multilayer printed circuit board, the multilayer printed circuit board comprising a plurality of antenna elements including a plurality of transmit patches configured to directionally radiate a transmission signal and a plurality of receive patches configured to receive reflected images of the transmission signal;
the radar antenna further comprising an isolation element affixed to the multilayer printed circuit board and disposed between the transmit patches and the receive patches, the isolation element configured to electromagnetically isolate the receive patches from the transmit patches;
a radar transmitter operably connected to the radar antenna;
a radar receiver operably connected to the radar antenna;
an enclosure formed from a plastic material with a gimbal mount integrally formed therein, the enclosure comprising a transmitter chamber configured to cover at least a portion of the radar transmitter and a receiver chamber configured to cover at least a portion of the radar receiver, the enclosure formed from a 3-D printing process and electroplated to electromagnetically isolate the receiver chamber from the transmitter chamber;
a radome formed of a water repellent breathable fabric and configured to cover the radar antenna, the water repellent breathable fabric comprising a porous membrane capable of passing water vapor without passing liquid water and a fabric backing bonded to the porous membrane;
a radar data acquisition module configured to convert a demodulated radar return signal provided by the radar receiver to a digital baseband signal;
the radar data acquisition module configured to provide the digital baseband signal as a sequence of scanlines;
a radar data processing module comprising a video processor configured to receive the sequence of scanlines and programmed to compute Doppler shift data for a plurality of ranges from the sequence of scanlines, and estimate a vehicle pitch and yaw from the Doppler shift data;
the radar data processing module further configured to initiate an orientation adjustment of the radar antenna to compensate for the vehicle pitch and yaw.
2. The apparatus of claim 1 , wherein the target information comprises magnitude and phase information corresponding to at least one target.