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August 14th 03, 12:43 AM
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Coax Cable vs Freqency
where does that come from?
"Reg Edwards" wrote in message ... For anyone who may be interested. Typical of RG-58 and RG-11 type cables. Zo = Ro - jXo Xo is always negative. Angle of Zo in degrees. Always negative. VF = relative velocity. Freq Ro jXo Angle VF ------ ------ ------ ------ ------ 50 Hz 967 -965 -44.95 0.034 1 kHz 220 -213 -44 0.151 10 kHz 80 -58 -36 0.41 100 kHz 56 -9.3 -9.5 0.59 1 MHz 52.4 -2.4 -2.7 0.63 10 MHz 50.7 -0.76 -0.86 0.65 100 MHz 50.2 -0.23 -0.27 0.66 Smith Chart calculations begin to be inaccurate around 2 MHz and below. So do SWR meters. |
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