A W-Band Frequency Quadrupler MMIC

In this paper, a W-band frequency quadrupler MMIC in a commercially available 0.1-μm GaAs PHEMT process is presented. The MMIC integrates a Q-band frequency doubler followed by a Q-band driver amplifier, a W-band frequency doubler, and a W-band driver amplifier. Measured results show that, the presented frequency quadrupler exhibits a maximum output power of 17 dBm with a 3-dB bandwidth from 84 to 100 GHz. Thanks to the balanced topology of the frequency doublers and the high-pass characteristic of the W-band driver amplifier, the unwanted harmonic suppression is better than 50 dBc within the entire bandwidth. The chip size is 1.45 × 1.25 mm
²
including all pads.