A Pattern Reconfigurable Antenna for Wide-Angle Scanning Arrays at mm-Waves

This paper presents the design of an antenna array specifically tailored for wide-angle scanning in mm-wave applications. The proposed design utilizes a half-loop antenna topology optimized for edge-fire radiation, making it highly suitable for integration into mobile user equipment. Each array element features two independent ports supporting two distinct radiation pattern modes, enabling coverage of the angular ranges from ϕ = -90° to ϕ = 0° and from ϕ = 0° to ϕ = 90°, respectively. Extensive simulations demonstrate an impedance bandwidth spanning the entire n257 band. The 8-element linear array achieves a peak realized gain of 13 dBi. Furthermore, measurement results indicate a scan range from -80° to +80° with a scan loss of 3 dB and a side lobe level below -10 dB.