Yuanxun Ethan Wang, UCLA


Time-varying transmission lines (TVTL) and filters consist of passive transmission-lines and resonators in which the inductance or capacitance is modulated by the voltage of an electromagnetic wave called pump wave – hence the “time-varying” aspect. They can be used as fundamental building blocks that to create RF front-ends that are capable of advanced signal processing. The operation of these circuits possess both passive and active characteristics. They are fundamentally low loss and low noise – comparable to that of passive components. while the parametric gain of the time-varying operation can be used to compensate for the loss of the passive components and improve the overall noise performance.

Novel tunable peak amplifiers and tunable bandpass filters are designed, fabricated and tested to demonstrate the feasibility of implementing such dynamic RF front-ends for advanced signal processing that is needed for Cognitive-IoV with Simultaneous Sensing and Communications.