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Cecil, W5DXP wrote:
"For instance, at a conjugate match point where 100+j100 is seen looking in one direction and 100-j100 is seen looking in the opposite direction, there seems to be a "localized" exchange between +j100 and -j100 that can adversely affect the value indicated by an SWR meter placed between these values." If we have a resonant LC circuit, there is only resistance to limit current. If the resonant circuit is a series combination, we can place a certain voltage of the resonant frequency across the series combination. Voltage across either L or C can be much larger than the applied voltage as the reactive Z`s are equal and opposite. This leaves the applied voltage equal to (I)(R). Some day I hope to see Chipman`s analysis. Transmission lines have distributed inductance and capacitance. A "conjugate match point" seems an oxymoron to me. A conjugately matched circuit demonstrates this condition no matter where it is sliced to look in both directions. A resonant length of transmission line with reflections will have more loss than a similar matched line simply because the msatched line has no opportunity to lose some of the reflected energy. Seems to me, we correct power factor at a load to eliminate reactive current in the power line. We are resonating the load and eliminating a reflection from the load. If loss from reflected power is trivial, we don`t need to worry with matching at the load and can match at the sending end of the line to get the power we need. Best regards, Richard Harrison, KB5WZI |
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