W-band millimeter-wave antenna measurement system using an optical fiber link millimeter-wave generator

Abstract

We have newly developed a W-band millimeter wave signal generator using an optical second-order harmonic generation technique for a LiNbO3 Mach-Zehnder optical intensity modulator. For generating the millimeter wave from 75 GHz to 110 GHz, our developed signal generation technique uses the signal generator from 18.75 GHz to 27.5 GHz, a microwave amplifier, the LiNbO3 Mach-Zehnder optical intensity modulator, and a photodiode. The system can generate the millimeter wave signal level of more than −30 dBm. We demonstrated antenna radiation pattern measurement for a standard gain horn antenna and an open-ended waveguide probe.