Tunable C-section phaser for dynamic analog signal processing

Abstract

This paper proposes a tunable phaser consisting of a conventional C-section incorporating two small-value varactors. Theoretical analysis shows that the varactors add a transmitting pole to the frequency response of the phaser and that this pole addition leads to a wide passband in addition to the group delay tunability provided by the varactors. A proof-of-concept design example is provided. Such a tunable phaser is expected to find wide applications in dynamic Real-Time Analog Signal Processing (R-ASP).