100 GS/s Equivalent Time Sampling Receiver for UWB Radar Applications

This paper presents the design of an ultra-wideband (UWB) sub-nanosecond equivalent time sampling (ETS) receiver. It has been developed as a part of a novel silent speech radar application working at frequencies between 500 MHz and 5 GHz. The system is based on commercial-off-the-shelf (COTS) components such as a programmable delay chip (PDC), track and hold amplifier (THA) and an analog to digital converter (ADC). The receiver system has been fabricated on PCB, optimized and tested. The resulting system accepts a LVPECL sampling clock up to 250 MHz and features an analog input bandwidth of 5 GHz and an equivalent sampling rate of up to 100 GS/s.