A linear IR-UWB MIMO radar array

A linear impulse radio ultra wideband MIMO radar array is presented. The IR-UWB imaging array is true time delay based. The imaging system is implemented using an impulse radio radar transceiver which is realized in 90 nm CMOS technology. The transceiver has programmable coarse, medium and fine delay lines which facilitate an electronic beamsteering with high resolution. A calibration circuit and scheme for precise delay adjustment of antenna elements are presented. Tapered slot Vivaldi antennas are used in both of the transmit and receive arrays. The MIMO radar array is modeled in MATLAB. Using the accurate calibration procedure, measurement results agree very well with the simulation results. A clutter map removal method is used for reducing the antenna elements cross-talk effect and the static variations to improve the image quality. The effects of different array parameters such as inter element spacing and number of transmit and receive antenna elements on the array pattern in terms of resolution and signal to noise ratio are studied to optimize and enhance the MIMO radar array performance.