Design of an in-package transmit-array for automotive applications:preliminary results

A packaged transmitarray (T A) antenna operating at 77 GHz is designed. The proposed configuration is based on a standard Quad Flat No-lead package (QFN) technology. The electromagnetic field radiated by a feed placed in the QFN is focused by the transmittarray antenna placed on the package cover. An analytical model is used to estimate the basic parameters of the proposed transmit-array like gain, directivity and spillover efficiency. The final design has then been optimized through full-wave simulations. Simulated gain is 18dBi at 77Ghz while the half power beamwidth is 22°. The proposed configuration is a good candidate for automotive highly integrated mid gain applications.