Design of Series- fed Patch Array with Modified Binomial Coefficients for MIMO Radar Application

In this paper, we propose a collocated antenna configuration having three transmitter and five receiver arrays for automotive MIMO Radar application. The individual antenna arrays consist of a seven-element series fed array with the feed provided at the edge. We introduce a modified-binomial coefficient-based excitation scheme to achieve improved side-lobe level (SLL) in series-fed patch arrays with edge feeding. The proposed MIMO configuration exhibits low SLL less than 16 dB and a wide field-of-view (FoV) of about 80° in the azimuth plane, along with satisfactory angular resolution (5.82°) and low cross-polar level (30 dB), rendering it extremely suitable for automotive medium-range radar (MRR) application.