Quadrature frequency multiplier

摘要

Quadrature frequency multiplier comprising a frequency doubler included in a quadrature signal path, said frequency doubler receiving a quadrature input signal and providing a quadrature output signal of a frequency, which is double that of said input signal. An array of such frequency doublers allow to derive from an input quadrature signal of a frequency fin, quadrature signals at frequencies mutually differing by a multiplication factor of 2<n>. To derive quadrature signals at a frequency in between, the invention makes use of a quadrature image frequency cancelling mixer stage having first and second quadrature inputs coupled to said quadrature signal path across said frequency doubler and providing a quadrature signal at a quadrature output having a frequency corresponding to the sum or difference of the frequencies of the signals at said first and second quadrature inputs and differing from the frequencies of the signals occurring in said quadrature signal path. <IMAGE>