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"Roy Lewallen" wrote:
All the power produced by the transmitter arrives at the antenna less whatever is lost as heat in the transmission line. There are no waves of average power bouncing back and forth on a transmission line. Mathematically separating the power moving down the line into "forward" and "reverse" components doesn't mean that waves of average power actually exist. ____________ Roy, I have been involved with the evaluation and repair of FM and TV broadcast antenna systems where the initial problem was a failure in the antenna, which then produced a high mismatch between it and the main transmission line. The allegedly non-existent nodes along the transmission line for this condition did a fine job of melting holes in the inner conductor and Teflon insulators of 3-1/8" OD (and larger) rigid transmission line, at 1/2-wavelength intervals over a considerable length of that line. What other phenomenon do you believe caused such a result? RF |
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