Multi-vector outphasing provides high power, low harmonics

This paper describes a further development of the Chireix-Doherty principle of the Linear Amplification using Non-Linear Components (LINC). The proposed multi-vector topology facilitates the design of the high power, high frequency DC/AC inverters, operating with the resonant load, with the sinusoidal output waveform and easily controlled amplitude by combining the output power of multiple identical high efficiency switchmode inverters with the individual phase shift control. The targeted cancellation of the higher harmonics in the inverter output current allows using of the output series filter with wider bandwidth decreasing the inverter output impedance and improving the output voltage phase stability. The most important outcome of the inverter output current cleanup is a significant reduction of the conduction losses per switch which is extremely important for the high temperature applications.