MILLIMETER-WAVE GENERATION ON NONLINEAR TRANSMISSION-LINES

In recent years, nonlinear transmission lines (NLTLs) have successfull y been used to generate ultrashort electrical pulses and transients fr om a sinusoidal input signal. In the frequency domain, this pulse comp ression results from the generation of a large number of harmonies wit h suitable phase relationships. In this paper special examples of NLTL s are studied which are capable to produce millimeter wave signals at selected frequencies, here by second and third harmonic generation nod nonlinear active wave propagation effects. Bi-modal transmission line s are particularly discussed which provide the necessary dispersion fo r high conversion efficiencies.