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Dear Mr. Richard Clark,
I would like to much appreciate your comments which guided Miss Emma and the rest of us, TheDAG members, to consider the Hentenna as a parallel combination of two shorted transmission line segments, a fact which definitely lacked our attention! Now, it is interesting to note that this two Transmission Line pieces in parallel present a theoretical SWR = oo, independently of any parameter. This result embarrasses somewhat the view of the Hentenna | ... | fed at an opportunistic point for the purpose of matching to the source | ... Besides that, a Richwire-MoM simulated Hentenna model gives a computed directivity of ~3dBd, which obviously is rather something more than | ... | a classic, skeletal cavity resonator that leaks | ... After these, it seems more appropriate to ascribe "Hen" to the fact that a rather slim Hentenna, externally looked almost as a lambda/2 dipole, gives a computed directivity twice as much as of its dipole counterpart with a surprising 90 degrees rotated Linearly Polarized Pattern in the direction of its maximum, relatively to the well known polarization of its counterpart, for the same orientation of both. But enough with the theory. Practical conclusions are expected to result from the comparison of the measurements between the two, under construction, models: the initially given and the -hopefully- improved one. Once again, thank you very much for your time and help. Sincerely yours, pez SV7BAX TheDAG |
#13
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A Study of Hentenna : Analysis, Simulation, Construction and Antenna
FunkTechnikPlus # Journal
Théorie-Expérimentation-Métrologie-Logiciel-Applications open transactions on independent scientific engineering research Issue 12 - Year 4 A Study of Hentenna : Analysis, Simulation, Construction and Antenna Pattern Measurements E. A. Babli, N. I. Yannopoulou, P. E. Zimourtopoulos https://www.otoiser.org/index.php/ftpj/article/view/64 Paper 26 Download https://www.otoiser.org/index.php/ft...download/64/56 Current Issue 17 - Year 6 - Sunday 30 September 2018 https://www.otoiser.org/index.php/ft...iew/2018.09.30 Next Issue 18 - Year 6 - Thursday 31 January 2019 https://www.otoiser.org |