A Simplified Hemispherical 2-D Angular Space Null Steering Approach for Linearly Polarization

A simplified two-dimensional (2-D) angular space null steering approach is presented in this letter for the linearly polarized (LP) null reconfigurable antenna (NRA) applications. In the proposed approach, a deep null of linear polarization in the radiation pattern can be achieved by combining a corner truncated patch with an omnidirectional radiating monopole. By tuning the amplitude ratio and phase difference of the two input signals, the resulting radiation pattern is able to generate a gain null that is steerable in the elevation and azimuth planes. Compared to the previous reported antenna structures, the proposed approach is easy in fabrication without using switching components. For the first time, we experimentally demonstrate the proposed approach by analyzing the null depth and the steering angle range.