Measuring FT140-43 3T Ferrite Loss

Using an Uncalibrated AA-54 Antenna Analyzer

Lack of calibration at inductor results with an approximation. Yre = R / (R^2 + X^2) At 14 MHz, Yre = 320.6 / (320.6^2 + 186.1^2) = 0.002333 dB = 10 * Log10(0.02 / (Yre + 0.02)) dB = 10 * Log10(0.02 / (0.002333 + 0.02)) = -0.479 dB

Using AA-54 with AntScope and OSL Calibration

Yre = R / (R^2 + X^2) At 14 MHz, Yre = 202.7 / (202.7^2 + 220.1^2) = 0.002264 dB = 10 * Log10(0.02 / (Yre + 0.02)) dB = 10 * Log10(0.02 / (0.002264 + 0.02)) = -0.466 dB Measurement using a 2 Port VNA

Alternate UHF 50Ω Calibration Load

2 X 100Ω NonInductive Metal Film Resistor Mouser Order ten, select two which equal 50Ω in parallel.