Microwave and Millimeter-Wave Oscillators and Planar Power Combining Structuresfor QWITT and Gunn Diodes

摘要

Quantum well (QW) diode oscillators have recently been shown to have thepotential to generate power in the millimeter (mm) and sub-mm wave region. The small signal microwave impedance of a modified QW device called the quantum well injection transmit time (QWITT) diode is measured and compared with theoretical predictions. Based on the small signal impedance of the device, several QWITT oscillators were designed and fabricated. The highest power ever reported for a QW diode oscillator was obtained at about 8 GHz. Keywords: Quantum well oscillators, QWITT diode, Power combining, Quasi optical power combining. (r.r.h.)