An RF/Microwave multiplier is a nonlinear device that efficiently produces output signals at integer multiples of the input signal frequency. The input frequency is called the ‘fundamental’ frequency, and the output signals at multiples of the fundamental are called the ‘harmonics’. Important metrics of a multiplier include the conversion loss between the fundamental and the desired harmonic, suppression of undesired harmonics, power required at the input, power generated at the output, and additive phase noise of the multiplier. Our surface mount MMIC doublers feature optimized chips packaged into an industry-standard ceramic QFN. Marki multipliers include balanced doublers, amplifier multipliers, and nonlinear transmission lines.