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how to design LO for rf frequency of 20 to 2700 MHz

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rsunni

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how to design LO for rf frequency of 20 to 2700 MHz
 

Having one VCO with this wide range (almost three decades) is imossible.
One posibility is to mix two oscillators, one having fix frequency (let’s say on 5GHz), with a VCO (from 5GHz to 7.7GHz). In this way the resulting frequency is from 0 to 2700MHz.
 

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