A V-band switched-beam transmit-array antenna

A high-directivity switched-beam antenna in the V-band is presented and includes a circularly-polarized transmit-array realized in a low-cost printed technology associated with a focal source array integrated on high-resistivity silicon. The measurements show a maximum gain of 12.1 dBi, a 3-dB gain-bandwidth of 57.8-70GHz, and an axial ratio below 5dB. The antenna exhibits five beams pointing from -22 degrees to +23 degrees in one plane, its size of 25x25x10mm(3) is compatible with the integration in different multimedia communication devices.