#20 Magnet Wire
SimSmith Transmission Line Evaluation

VNWA Measurements


  • 1:1 Voltage Balun = 2 x FT50-34 10T:10T
  • OSL Calibration at Balun balanced side.
  • Calibration L = non inductive 98.28Ω resistor
  • SimSmith File: SS-N20-VNWA.ssx
  • VNWA nominal values:
    • Zo = 64.5Ω
    • Vf = 0.79
    • k1 = 0.78
    • k2 = 0.024



VNWA k0 Evaluation

  • TL direct connect to VNWA calibration plane
  • 12kHz (VNWA IF) data point removed from s1p files
  • SimSmith File: SS-N20-VNWA-1M.ssx
  • k0 Calculation:
    • #20 DCR Specification = 10.15Ω/1000'
    • #20 DCR = 2.03Ω/200;
    • SimSmith k0 == 20 * log((Zo + DCR/2) / Zo)
    • #20 TL k0 = 20 * log((64.5 + 2.03/2) / 64.5) = 0.1356



VNWA 10kHz to 30MHz Evaluation

  • Sum 10kHz to 1MHz and 1MHz to 30MHz files
  • SimSmith File: SS-N20-VNWA-Sum.ssx



VNWA Two Port Evaluation

  • 12-term correction
  • Export VNWA data function s_dm
  • SimSmith File: SS-N20-VNWA-s_dm.ssx



10kHz - 30MHz
SS-N20-VNWA-s_dm-2.ssx



VNWA Compare Direct, Balun, and 2-Port


Compare/ss-Compare.ssx



2-Port OSL Calibration



2-Port Thru Calibration



AA-54 Measurements

  • Measured with AA-54 in stand alone mode (No Balun)
  • Download AA-54 using AntScope Software
  • AA-54 measured #20 Parallel TL parameters
    • k1 = 0.83 (dB matched loss at 1MHz / 100')
    • Vf ~= 0.78
    • Zo ~= 68Ω

SimSmith Loss Computations
SS-N20.ssx



SimSmith TL k1 match
SS-N20-SSTL.ssx



SimSmith TL k1 match to 15MHz

  • SimSmith File: SS-N20-SSTL-15M.ssx
  • AA-54 nominal loss value:
    • k1 = 0.86

SS-N20-SSTL-15M.ssx




AA-54 TL Open Condition Z
  • SS-N20-Open.ssx
  • TL 1/4λ ~= 12.45MHz
  • TL 1/2λ ~= 24.87MHz
  • Antenna Effect 1/2λ ~= 26.22MHz