Farran Technology Limited

Sean Cremin

Jason Lynch

An upconverter receives an intermediate frequency (IF) modulated signal on a port () and a local oscillator carrier signal at a port (). A comb generator (-) generates a comb-like waveform from the carrier signal, the waveform having a peak for each of a number of multiples of the carrier fundamental. A bandpass filter () selects one of the comb peaks and there is further multiplication at a quadrupler (). The modulated signal (IF) and the multiplied carrier are mixed in a mixer () to provide a high frequency upper sideband (LO+IF) output. The output is transmitted in a waveguide () which is integral with the casing () and which performs high frequency filtering by virtue of its shape.

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Cork, Ireland

Sean Cremin