Amplifonix, a division of Spectrum Microwave, is a manufacturer of Hybrid, Bi-Polar and GaAs FET Low- to Medium-Power Amplifiers, PIN Diodes, GaAs FET Switches and Voltage Controlled Oscillators (VCO) that operate in the frequency range of a few kHz to 3,000 MHz. The company was founded by Dr. Arthur Riben in 1980. The company's original charter was to be a second source to amplifier manufacturers in the low frequency spectrum, commonly called the IF or RF sections of a system. The product line now includes over 5,000 customer specified amplifiers, switches, and VCOs, which are modifications of standards or new exclusive designs for customer applications.
In June, 2011, Spectrum Microwave was acquired by API Technologies.