You can now help support WorldwideDX when you shop on Amazon at no additional cost to you! Simply follow this Shop on Amazon link first and a portion of any purchase is sent to WorldwideDX to help with site costs.
The Feb 2025 Radioddity Giveaway Results are In! Click Here to see who won!

Reply to thread

Message

I realize the top portion of the mast below and near the feed point is out of phase just like you suggest. My model shows this 1/4 wavelength too. I was referring to the primary section of currents on the mast that is a 1/2 wavelength...and as noted in the exaggerated antenna view attached below.

IMO, the lobe I marked radiates constructively with the top 1/2 wave of the radiator. I am not suggesting this lobe makes much radiation or that one can expect it to be a detectable advantage however.

On the contrary my Sigma 4 model shows the opposite mast/coax radiation. See the 2nd exaggerated image of the S4 attached below...the current is on the opposite side of the image just as I mentioned earlier. I could had described myself better.

[QUOTE="Marconi, post: 549074, member: 903"] I realize the top portion of the mast below and near the feed point is out of phase just like you suggest. My model shows this 1/4 wavelength too. I was referring to the primary section of currents on the mast that is a 1/2 wavelength...and as noted in the exaggerated antenna view attached below. IMO, the lobe I marked radiates constructively with the top 1/2 wave of the radiator. I am not suggesting this lobe makes much radiation or that one can expect it to be a detectable advantage however. On the contrary my Sigma 4 model shows the opposite mast/coax radiation. See the 2nd exaggerated image of the S4 attached below...the current is on the opposite side of the image just as I mentioned earlier. I could had described myself better. [/QUOTE]

Top Bottom