A Tunable Dielectric Resonator Oscillator with Phase-Locked Loop Stabilization for THz Time Domain Spectroscopy Systems

Precision microwave measurement systems require highly stable oscillators with both excellent long-term and short-term stability. Compared to components used in laboratory instruments, dielectric resonator (DRO) offer low phase noise greatly reduced mechanical complexity. To further enhance performance, phase-locked loop (PLL) stabilization can be eliminate drift provide precise frequency control. In this work, the design of a low-cost DRO concept is presented its performance evaluated through simulations measurements. An open-loop −107.2 dBc/Hz at 10 kHz offset 12.8 GHz output demonstrated. Drift are by PLL, so that very jitter under 29.6 fs achieved over entire operating bandwidth.