QT designed instrumentation -microwave



general info on microwaves
10MHz distribution amplifier with low phasenoise

more info
phase readout (and stabilisation) of microwave generators
(example shows 10MHz generator spacing, has changed to 1MHz spacing now) view the basic experimental application

more info on the sampling concept

example reading of a 20GHz signal, recorded with 10sec persistance
showing the phasestability of the readout:


Phase readout rack, with 6 samplingheads (inputs A...F)  voltage controlled sampling delay input and 10MHz ref
  
dc-block (5kHz-2GHz)

cryogenic Bias-Tee's 5Hz-2.5GHz (connected to gate)

circuit
room-temperature Bias-Tee 10kHz->3Ghz with d.c.monitor out (SSPD application) bottom/top view
 
S21: green: cable only, yellow: cable+bias-tee
S11: red:cable only, blue: cable+bias-tee
circuit
BalUn (balanced output produces 2 opposite phase signals from 1 input signal)
phase error <8deg from 100MHz to >1GHz
tunable bandpass filters