A novel array structure for the meter-wave radar

The elevation angle estimation for meter-wave radar is easily affected by the indirect signal of the low elevation signal. However, the indirect signal is coherent with the direct signal. A novel array structure was designed to improve the estimation performance for the meter-wave radar. The presented array consists of two different non-uniform arrays without ambiguity, and the algorithm was amended. The narrow beamwidth is obtained to differentiate the closed signals using the whole array. The coherent direct angle and indirect angle can be estimated exploiting the partial sensors. Simulation experiments' results show that compared with the uniform linear array, the new array structure greatly improves the estimation performance for meter-wave radar.