A Broadband Static Frequency Divider up to 62 GHz in InP DHBT with Capacitive Degeneration

Abstract

A broadband static frequency divider fabricated in a 165 GHz f_t 0.8 µm 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 devicef_t utilization. The chip occupies 0.484 mm×0.44 mm and consumes 380 mW from dual supplies of -2.5 V and -3.5 V. The measured input-referred self-oscillation frequency (SOF) is 56 GHz, and the output power locates in -5.87∼1.87 dBm. With single-ended sine-wave input, the divider is operational in 2∼62 GHz, exhibiting a 0.36-f_t frequency range.