Design of a Sub-THz Phased Array Antenna Based on VO2 Switches for Beamforming

초록

In this work, a reconfigurable phased array antenna is designed for sub-terahertz (sub-THz) beamforming using vanadium dioxide (VO2) switches. As VO2 exhibits a thermally induced phase transition, a thermal management strategy is incorporated at both the unit-cell and array levels to suppress thermal crosstalk. A 2-bit true time delay (TTD) phase shifter operating at 105 GHz demonstrates the worst-case insertion loss of 5.88 dB. When integrated into a 4-element antenna array, the system achieves beam steering in the H-plane over an angular range of -18° to 18°.

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