A 2mm-band frequency tripler built on quartz was formed by anti-parallel Schottky-barrier varactor diode pair. Its equivalent circuit model had been built and the component parameters were obtained. Then the tripler was designed and realized. Its input signal was fed in by a K connector, and the output signal was fed out by a WR-8 waveguide. When the output signal frequency is between 112.8 GHz and 118.2 GHz, the best conversion loss is 16 dB and the output power is larger than 0 dBm with maximum 2.05 dBm at 118 GHz. The tripler module can supply good local oscillation source for the meteorological measurements.