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This work presents the design and performance of a ×6×3 frequency multiplying chain which covers the frequency range from 207 to 220 GHz. The chain consists of an E-band sextupler, a four-way power-combined amplifier which delivers 300 mW output power and a 220 GHz balanced power-combined frequency tripler. Each way of the tripler circuit includes two anti-series mounted GaAs Schottky diode chips in which each diode has three anodes in series. The chain delivers maximum output power of 23.8 mW at 210 GHz with efficiency of 6.8 % and its output power is higher than 15 mW from 208.8 to 217.2 GHz. The chain has sufficient power to pump a 425 GHz heterodyne receiver and is possible to be used as a transmitting source for 220 GHz security detection systems.

A 210 GHz Power-Combined Frequency Multiplying Source with Output Power of 23.8 mW