Ultra-broadband lossy match amplifiers

The authors describe the design, fabrication, and performance of a three-stage lossy match amplifier with a gain of 8.0+or-0.6 dB and a return loss of better than 9 dB over the 2- to 32-GHz band. By using a novel m-derived low-pass network with cutoff frequency of greater than square root 2 times as high as that of a conventional network, the ultrabroadband lossy match amplifier has achieved a high gain-bandwidth product. The advantage of this novel network is that the gain can be increased without lowering the bandwidth by increasing the interstage network impedance of the lossy match amplifier.<>