Sampling circuit on silicon substrate for frequencies beyond 50 GHz

Receiver and Synchronization for UWB impulse radio signals

“…In this section, assume that the RF input signal is a 3rd order derivative 300 ps pulse width with a typical [3][4][5][6][7][8][9][10] GHz occuptation bandwidth. Its pulse shape is presented Fig.…”

“…In the frequency domain, this RF signal is equivalent to a several gigahertz occupation bandwidth B. Sampling at these frequencies requires new architecture [2], such as inter-digitalized ADC, one shot processing [3], optical systems [4], high speed diodes [5], [6], ... Nevertheless, since the pulses are repetitive, according to a fixed pulse repetition frequency FPRF, it is possible to recover the pulses shape, sampling them at a FS (sampling frequency) close to FPRF.…”

“…K= FPRF FPRF -FS (6) Particular limitations about this sampling offset should be noted [7]- [9]. According to the Nyquist relationship: t'ax (2B)' but in practice, we prefer to have at least: tli-max (5B)…”

Pulse generator for UWB communication and radar applications with PPM and Time Hopping possibilities

“…For example, with a NAND gate, when the two inputs RADAR with high output peak voltage [1], sampling at INAand INBare both in low state, the output is "high". With millimeter waves with very short fall/rise times and duration a XOR gate, the output is high only when INA and INB are in [2], TDR/TDT at millimeter waves [3], and recently wireless different states, the PRF will be twice the INA INB inputs communications with specific pulse shape (FCC part 15 frequency (Fig. 1).…”