A Broadband High Suppression Frequency Doubler IC for Sub-Millimeter-Wave UWB Applications

Abstract

A broadband balanced frequency doubler has been demonstrated in 0.25-μm SOI SiGe BiCMOS technology to operate trom 22 GHz to 30 GHz. The measured fundamental frequency suppression of greater than 30dBc is achieved by an internal low pass LC filter. In addition, a pair of matching circuits in parallel with the LO inputs results in high suppression with low input drive power. Maximum measured conversion gain of ―6 dB is obtained at the input drive power as low as ― 1 dBm. The results presented indicate that the proposed frequency doubler can operate in broadband and achieve high fundamental frequency suppression with low input drive power.