Resonant Lines for Device Measurement, 10 MHz – 3.5 GHz

[The following information was originally presented at Capacitor and Resistor Technol. Symp., New Orleans, 1999]

 

Background

  • Used since WWII (Westphal & VonHippel, MIT)
  • ASTM standard F752-82 (expired)
  • Boonton 34A
  • Still useful, applicable to higher and lower frequencies…

Three_lines

 

Equivalent Circuits

Equivalent_circuits

 

Q-factor Interpolation

60 cm line (BEC 34A s/n 176) …

Q_sn_176

15 cm line…

Q_15_cm

We tried three different interpolation rules …

Q_interp

Fixture Resistance

  • Should go according to skin depth (f1/2)
  • A good test of the interpolation rule for QOC

R_fixt

Device Measurements

18 pF EIA 0306…

18_pf

… one sample measured with three resonant lines.

Download copy of original CARTS 1999 Resonant Line Paper

 

 

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