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.

Reply to thread

Message

Steve, would you not be one of the first to claim an aperture advantage for a .64 wave radiator over a .625 wave? If so, why then do you choose to ignore the characteristic with these images. We can't even be sure of the magnitude of current represented by the color representations. We might assume the amount of red and blue bloom is a measure of the magnitude of current flowing, but in my examples of Exnec5, I can make that look anything I want too just by clicking on the elevator that makes the red line currents look greater or less. How about checking the current distribution values for the antennas represented in each image?

Unless I'm totally wrong, it's like I try to say all the time, "...we can't always know the full story of any representation...just by looking at the pictures."

If nothing else, the Vector is at least 33% larger than the GM and is very effective at radiating the whole antenna in phase in the far field. I think we may also both agree...this factor alone may be the primary benefit for the GM over other 5/8 wave radiators, with the bottom 1/8 wave for the typical end fed 5/8 wave being out of phase, providing little or no contribution to far field RF.

I guess we could also argue if the red and blue are near field or far field as well? Let me know if I'm looking at these images and data wrong, OK?

<blockquote data-quote="Marconi" data-source="post: 260068" data-attributes="member: 903">Steve, would you not be one of the first to claim an aperture advantage for a .64 wave radiator over a .625 wave? If so, why then do you choose to ignore the characteristic with these images. We can&#039;t even be sure of the magnitude of current represented by the color representations. We might assume the amount of red and blue bloom is a measure of the magnitude of current flowing, but in my examples of Exnec5, I can make that look anything I want too just by clicking on the elevator that makes the red line currents look greater or less. How about checking the current distribution values for the antennas represented in each image?&nbsp;Unless I&#039;m totally wrong, it&#039;s like I try to say all the time, &quot;...we can&#039;t always know the full story of any representation...just by looking at the pictures.&quot; &nbsp;If nothing else, the Vector is at least 33% larger than the GM and is very effective at radiating the whole antenna in phase in the far field. I think we may also both agree...this factor alone may be the primary benefit for the GM over other 5/8 wave radiators, with the bottom 1/8 wave for the typical end fed 5/8 wave being out of phase, providing little or no contribution to far field RF.&nbsp;I guess we could also argue if the red and blue are near field or far field as well? Let me know if I&#039;m looking at these images and data wrong, OK?</blockquote>

[QUOTE="Marconi, post: 260068, member: 903"] Steve, would you not be one of the first to claim an aperture advantage for a .64 wave radiator over a .625 wave? If so, why then do you choose to ignore the characteristic with these images. We can't even be sure of the magnitude of current represented by the color representations. We might assume the amount of red and blue bloom is a measure of the magnitude of current flowing, but in my examples of Exnec5, I can make that look anything I want too just by clicking on the elevator that makes the red line currents look greater or less. How about checking the current distribution values for the antennas represented in each image? Unless I'm totally wrong, it's like I try to say all the time, "...we can't always know the full story of any representation...just by looking at the pictures." If nothing else, the Vector is at least 33% larger than the GM and is very effective at radiating the whole antenna [B][I]in phase[/I][/B] in the far field. I think we may also both agree...this factor alone may be the primary benefit for the GM over other 5/8 wave radiators, with the bottom 1/8 wave for the typical end fed 5/8 wave being out of phase, providing little or no contribution to far field RF. I guess we could also argue if the red and blue are [B][I]near field[/I][/B] or [B][I]far field[/I][/B] as well? Let me know if I'm looking at these images and data wrong, OK? [/QUOTE]

Top Bottom