LLRF for SC Heavy Ion Linear Accelerators Paper study at USPAS17 Qi Chen IMPCAS and LBNL
Low Level RF block-diagram
Phase / Amplitude Detecting ● I & Q D e m o d u l a t o r RF LO
Some trigonometric equations
Low Level RF block-diagram
Phase / Amplitude Modulation ● I & Q Modulator RF LO
Some trigonometric equations
How mixer works Ideal Mixer (Multiplier) ● We need new frequency Input Output Signal Signal Local Oscillator
How to get 90° phase shift ● When a sinusoidal voltage is applied to either a simple capacitor or inductor, the resultant current that flows is "in quadrature" with the voltage.
Low Level RF block-diagram
Phase Diagram e d Q Value u t i l p m A Phase I Value
I & Q Modulation ● I & Q Modulator Output
Low Level RF block-diagram
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