W-band microstrip oscillator using gunn diode

摘要

A microstrip oscillator (16) uses a Gunn diode (36) as its active element for operation in the W-Band. A microstrip shunt resonator (28) is dimensioned to resonate the Gunn diode at either its fundamental frequency or second harmonic frequency while a matching circuit, including a quarter wavelength transformer (158) and a coupled microstrip transformer (62), is employed to match the complex impedance of the Gunn diode device to the load. A radial hat (54) on the Gunn diode (36) effetively prevents radiation of electromagnetic energy from the system to thereby maximize the energy delivered to the load while, at the same time, functioning as a transformer element.