Roger:
I¡¯ve always thought of the conventional antenna parameter measurement as the antenna being in series, i.e., Z load = Zs = Rs + Xs
Cebik notes that, with respect to modeling and looking at antennas that ¡°parallel ¡ circuits don¡¯t have much until it¡¯s, since they are only the converted counterparts of ¡ series circuits.¡±
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He does offer the case of looking at a beta or hairpin match, in which the matching section at the feedpoint is in parallel with the series feedline and load antenna, so clearly there is a place for conversion.
But could you expand a bit on situations in which you use the parallel model in general, or specifically to the sketch you posted?
No criticism implied, I¡¯m just looking for situations where parallel conversion might be advantageous, other than alternative S measurements using Y rather than Z, such as Jeff K6JCA has described below
Looking forward to your thoughts.
73
Ed McCann
AG6CX
