Multiple PLL oscillator and multiple CW radar used therefore

摘要

A multiple PLL oscillator for oscillating and outputting a plurality of frequencies having a predetermined step frequency, comprising a first and a second reference frequency sources, a switch for selecting the ore of outputs of the first and the second reference frequency sources alternatively and at predetermined time interval, and a PLL frequency synthesizer generating a millimeter wave oscillation output corresponding to each of the first and second reference frequency sources.