LAUSR

A scheme is proposed for generating low-phase-noise oscillatory signals in sub-millimeter-wave frequencies, which utilizes the dynamics of a traveling pulse rotating in a closed system of oscillators, which consists of transmission lines periodically loaded with resonant-tunneling diodes (RTDs) that is coupled with evenly spaced straight RTD lines. The spatial extendedness of the oscillator component results in an effective method of self-injection locking, by which the phase noise is reduced significantly. Herein, the principle of operation is described with its numerical/experimental validation, together with the potential to generate harmonic signals. To detect pulse dynamics definitely, the experiment was carried out in MHz frequencies utilizing tunnel diodes in place of RTDs.