A broadband static frequency divider up to 62GHz in InP DHBT with capacitive degeneration

Abstract

A broadband static frequency divider fabricated in a 165GHz f_t 0.8μm InP DHBT process is described. Capacitive degeneration technique is adopted, extending the operating bandwidth with little increase in power consumption and area occupancy. The device characteristics are analyzed to achieve high device f_t utilization. The chip occupies 0.484mm×0.44mm and consumes 380mW from dual supplies of -2.5V and -3.5V. The measured input-referred self-oscillation frequency (SOF) is 56GHz, and the output power locates in -5.87∼1.87dBm. With single-ended sine-wave input, the divider is operational in 2∼62GHz, exhibiting a 0.36-f_t frequency range.