Patent ID: 7986184

Claim:
A radiofrequency amplifier circuit constrained to a surface-mount-device package size and designed for amplifying a radiofrequency signal that includes base-band portion and a plurality of carrier signals, the carrier signals having frequency spacing that is greater than a bandwidth of a base-band portion of the radiofrequency signal, the circuit comprising: a radiofrequency transistor having a gate terminal and a drain terminal; a circuit output having a parasitic output capacitance; an electrical connection between the source-drain terminal and the circuit output; an internal shunt inductor providing compensation for the parasitic output capacitance; and a high-density capacitor providing capacitance sufficient to provide low effective impedance at frequencies near the frequency spacing and connected between the internal shunt inductor and a circuit ground, the high-density capacitor including a terminal with an outline containing three-dimensional structures, the terminal having a surface area about at least ten times of a planar surface of the same outline.