T80-2 36T #20 Q Measurement

VNWA S11 Fixture

VNWA S11 Measurement

Arbitrary Calibration using Female SDR-Kit BNC Calibration Kit
Amphenol 031-5329-52RFX Fixture delay = 26ps
Log frequency, 200 points, 20s sweep
Measurement is temperature sensitive, Calibrate just before measurement

VNWA S11 Measurement
Arbitrary Calibration using Female SDR-Kit BNC Calibration Kit Amphenol 031-5329-52RFX Fixture delay = 26ps Log frequency, 200 points, 20s sweep Measurement is temperature sensitive, Calibrate just before measurement

SimSmith Subtract Winding Capacitance Approximation

Prototype Q-Meter Analysis

Prototype Q-Meter Results in file QMdata
330pF C0G added at 2.5, 2, and 1.6 MHz
SimSmith Parameters:

L.file = VNWA S11 file
C1.F = negative wire capacitance
R1M = Wire resistance at 1MHz
Rp = Parallel core loss resistance
file = Q-Meter Q results file
err = correction factor to match VNWA S11

SimSmith Q equations:

Qrs = MHz / (R1M * MHz^0.5)
Qrp = Rp / MHz

SimSmith Traces:

Red Q = VNWA S11 corrected Q measurement
Black 1/(1/Qrs+1/Qrp) = Parallel of Qrs and Qrp
Blue (QMD+5)*err = Q meter measured data
50Ω Generator Q error ~=5 at Q=250

VNWA Bandwidth Fixture

VNWA Bandwidth Measurement

VNWA Q Complex Realtime Expression Evaluator