DISTRIBUTED-GAIN AMPLIFIER Russian patent published in 1999 - IPC

FIELD: radio engineering; radio communications transmitting devices. SUBSTANCE: according to invention, group of circulators and self-controlled power adder enabling addition of forward and backward waves in output transmission line are introduced in amplifier. The latter has N active elements, where N 3, N + 1 series-connected sections of input transmission line, ballast resistor, N - 1 circulators, and self-controlled power adder; input of first section of input transmission line functions as amplifier input; output of i section of input transmission line, where , is connected to input of i active element whose output is connected to input of (i + 1) section of output transmission line; first side of i circulator , except for i = N, is connected to output of (i + ) section of output transmission line; second side of i circulator is connected to input of (i = 2) section of output transmission line; third side of i circulator is connected to (i + 1) input of self-controlled power adder whose output functions as amplifier output. EFFECT: improved efficiency of amplifying microwave signals in broad frequency band. 4 dwg