Generating Ka-Band Signals Using an X-Band Vector Modulator
NASA’s Jet Propulsion Laboratory
Thursday, January 01 2009
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Advanced modulations can be selected by programming an FPGA.
A breadboard version of a transmitter for radio communication at a carrier frequency of 32 GHz (which is in the Ka band) utilizes a vector modulator operating at a carrier frequency of 8 GHz (the low end of the X band) to generate any of a number of advanced modulations that could include amplitude and/or phase modulation components. The 8-GHz modulated signal is mixed with a 24-GHz signal generated by an up-converter to obtain the desired 32-GHz modulated output.
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