Large-Signal Performance of Resonant Tunnelling Diodes in K-Band Oscillators

The large signal behaviour of resonant tunnelling diodes (RTD) in K-band oscillators is investigated in order to optimize the RF-output power of RTD-based voltage controlled oscillators. Circuit simulations based on a scaleable large-signal RTD model are presented and different approaches to increase the RF-power are proposed. A new differential RTD-VCO-circuit in InP RTD/HBT technology with a wide tuning range is introduced, employing balanced RTD-pairs.