Millimeter wave beam tilting array for radar system

A new kind of millimeter wave beam tilting array is designed and validated in this paper, the array is composed of four sub arrays to acquired high gain. Beam tilting radiation pattern is realized by the quasi-traveling wave operating structure. Absorbing patch is arranged at the end of every sub array for avoiding using matching resistor to improve the radiation efficiency of the array. The beam tilting radiation pattern forming theory is researched firstly and then a model is constructed and optimized with HFSS, a 32-elements array which operates in Ka band is fabricated and measured. The performance of the array is validated by good simulation and measurement results.