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
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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
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VNWA 10kHz to 30MHz Evaluation
- Sum 10kHz to 1MHz and 1MHz to 30MHz files
- SimSmith File: SS-N20-VNWA-Sum.ssx
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VNWA Two Port Evaluation
- 12-term correction
- Export VNWA data function s_dm
- SimSmith File: SS-N20-VNWA-s_dm.ssx
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10kHz - 30MHz
SS-N20-VNWA-s_dm-2.ssx
VNWA Compare Direct, Balun, and 2-Port
Compare/ss-Compare.ssx
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
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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:
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SS-N20-SSTL-15M.ssx
AA-54 TL Open Condition Z
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- SS-N20-Open.ssx
- TL 1/4λ ~= 12.45MHz
- TL 1/2λ ~= 24.87MHz
- Antenna Effect 1/2λ ~= 26.22MHz
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