T68-2 30T #22 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

VNWA Bandwidth Fixture
120pF COG || 120pF C0G || 150pF Variable

SimSmith Bandwidth Q Evaluation

Example VNWA Bandwidth Q Measurement

Prototype Voltage Ratio Q Meter

Volt Meter Description
18/120 pF Capacitive Divider
Full Scale VOM = 7.6346Vrms at Capacitive divider input
For Full Scale Q = 250
AWG Vrms = 50/250 * 7.6346 = 1.5273Vrms
Direct Measured Q at 3.8MHz = 230 + 6.6 = 237 (7% Low)
Linearity Evaluation

RF Volt Meter Calibration: 3.36Vrms = 1.1Vdc
Peak DUT at 1.1Vdc, AWG Vrms = 0.715
Q = 3.36/0.715 * 50 + 6.6 = 242 (5% Low)

3dB Bandwidth Q = 241

SimSmith Model Voltmeter Calibration
Generator Power set for 1V at Block L

SimSmith Q Meter Model
Inductor DUT Q=255
Delta = 255 - 248.4 = 6.6