Interesting antenna. Off the top of my head, at RF, I’d say there’s no difference in the resistive component of impedance; you’re still talking about a 5-ohm material. The reactive component probably does have to be modeled.
The big issue I see is that, unless all the component wires are precisely the same length, you’re going to get interference at multiple locations, varying with frequency. The small mismatches in reactance are going to induce eddy currents. And even if they are precisely the same length, considering skin effect, I don’t see how this arrangement adds any efficiency over a simple single-line radiator. But I could be totally wrong. 73 de N5OL Sent from my iPhone > On Jan 16, 2020, at 8:56 AM, Rick Hiller via BVARC <[email protected]> wrote: > > I am in the midst of analyzing a Ham market HF antenna. Still building the > EZNEC model, but working it thru the gray matter. > > Case: Take a 1/2 wl dipole antenna -- center fed. Each side is made up of > multiple, equal length wires that are each insulated, parallel, and closely > spaced. The wires are connected/common at the center feed point, but open at > the far end. > > If, at this length, each wire's material DC resistance is 5 ohms....does > using multiple wires in parallel, as described above, 1) lower the total RF > material resistance, as resistors in parallel....or 2) does it stay the same > or 3) does it become additive? > > Any comments would be appreciated. I've got my hypothesis, but wishing > additional input. > > Thanks and 73 ...Rick W5RH > > -- > Rick Hiller > e-mail: [email protected] > Cell: 832-474-3713 > Physical: 9031 Troulon Drive > Houston, TX 77036 > ________________________________________________ > Brazos Valley Amateur Radio Club > Get on the air - 146.94 Repeater > Volunteer now for the Houston Hamfest > > BVARC mailing list > [email protected] > http://mail.bvarc.org/mailman/listinfo/bvarc_bvarc.org
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