Use of modified operating mode of gallium arsenid Gunn diodes in the 35–47 GHz millimetre-range generators

Impedance and operating temperature of Gunn diodes (GD) used in the modified mode (MM) are the same as in the transit-time mode. The MM may be realized in GD with the thin base layer (L<;1.5μm), where the value of strong field domain equates, or exceeds, the base length. Extended frequency range and high efficiency of GD working in MM have allowed using GD efficiently in the following types of GD generators (GDG): GDG with output frequency F_out=35 GHz (with tuning range 1 GHz) with output power P_out>;120 mW, I_oper=0.5-0.55 A and U_oper=4.5-5 V; GDG with F_out= 37 GHz with P_out>;140 mW, I_oper<;0.7A and U_oper<;6 V; and GDG with F_out=47 GHz with P_out>;100 mW, I_oper=0.5-0.55 A and U_oper=4.5-5 V.