Wideband distributed power amplifier utilizing metamaterial transmission line conception with impedance transformation

A power amplifier used in a wideband radio frequency (RF) circuit implemented in an integrated circuit (IC), the power amplifier comprising:

• a transistor operating in a range of frequencies from a lower operating frequency to a higher operating frequency to provide a relatively linear gain between the lower operating frequency and the higher operating frequency;
• an input metamaterial transmission line coupled to a gate terminal of the transistor, wherein the input metamaterial transmission line includes a first inductor-capacitor (LC) circuit formed based on metamaterial, wherein the first LC circuit resonates at a first resonant frequency equaled to or higher than the higher operating frequency;
• and
• an output metamaterial transmission line coupled to a drain terminal of the transistor, wherein the output metamaterial transmission line includes a second LC circuit and a third LC circuit to form a composite metamaterial transmission line, wherein the second LC circuit resonates at a second resonant frequency equaled to or lower than the lower operating frequency, and wherein the third LC circuit resonates at a third resonant frequency equaled to or higher than the higher operating frequency.