Re: NEC-LIST: How to put source, load, and transmission line in series?

Rick, I have extensively modelled transmission lines.

1) To put a load in series with a source, put a jumper across the
transmission line and three segments on the jumper. Put the source
on the center segment; and half the load on the two outer segments.
Things start to go wrong for transmission line impedances less than
300 ohms (transmission line conductor too close).

2) Put a lot of segments on the parallel conductors of the
transmission line, segment size the same as the spacing between the
lines. If the transmission line is too long use the taper option.
Place the load on the short segment connecting the ends of the
transmission line conductors, and use two sources, a source on the
bottom end of each conductor forming the two conductor transmission
line.

But I question what you want to do? If the transmission line is
feeding a balance load --- okay use a voltage source. If the
transmission line is feeding a load which is not balanced, use (2)
above, and current sources.

73, John S. (Jack) Belrose, VE2CV, VE2KPG, VY9CRC

>I want to drive a transmission line with a voltage source, but
>put a load in series with the source. If I construct a short
>floating segment and put the source and transmission line on
>it, I can drive the transmission line directly from the source
>with no series load. Now, if I make a small loop from four
>segments and put the transmission line on one segment, the
>load on another segment, and the source on another segment,
>I don't get the right result. Is this supposed to work?
>Any other workarounds? (I am using EZNEC).
>
>Rick Karlquist N6RK
>
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