Monolithic 2-18 GHz matrix amplifiers

The design and performance of two different monolithic 2-18-GHz matrix amplifiers are discussed. The first module, optimized for gain and return loss, yields gains of G=15.5+or-0.9 dB and a maximum return loss of RL=-12.0 dB. When these modules are cascaded to form a two- or three-stage amplifier, gains of G=31.4+or-1.4 dB and G=43.2+or-1.8 dB, respectively, are measured. For the second unit, designed for low noise and gain, noise figures of NF=4.15+or-0.85 dB and gains of G=17.1+or-1.25 dB are achieved.<
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