Evanescent mode power combiner in suspended stripline configuration

In the search for low cost continuously tunable high power diode oscillator at Ka-band (26-40 GHz) device, a new millimeter wave evanescent mode power combiner with Gunn diode oscillator at 35 GHz employing combination of suspended stripline and evanescent mode resonator is reported. With a 35 GHz diode rated at 100 mW, stable power output of more than 160 mW is achieved over a tunable bandwidth of 26-40 GHz. The oscillator is simple in fabrication, cost-effective and is amenable for integration with other planar circuits.