TAPERED ATTENUATOR NETWORK FOR MITIGATING EFFECTS OF DIRECT CURRENT (DC) BIAS INDUCTOR SELF-RESONANCE IN TRAVELING WAVE AMPLIFIERS

摘要

The subject matter described herein includes a traveling wave amplifier having a tapered attenuator network for mitigating the effects of DC bias inductor self-resonance. One exemplary amplifier includes a plurality of gain stages connected in a ladder network for successively amplifying a forward traveling wave caused by an input signal to produce an output signal. The amplifier further includes a back termination coupled to the gain stages to absorb backwards traveling waves created by reflections from the gain stages and an output of the amplifier. The amplifier further includes an inductive DC bias circuit coupled to the gain stages near the back termination for providing DC bias to the gain stages. The amplifier further includes a tapered multi-section frequency selective attenuator network connected between the DC bias circuit and a first one of the gain stages for reducing the effect of self-resonance of the inductive DC bias circuit on the output signal.