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I'll repeat the question...as I have no idea who you are replying to Freecell, but make a guess it is me.

"By what means is V and I phase changing in a 1/4 wave by 90 degrees to make it purely resistive ? (compared to any other antenna)"

Your statement makes some sense as I recall what you say as Delta match based on this concept I recall from the exams. However why is current vs volts phase shifting along length of the elements ? I would say VF but this is unlikely as that is a constant along the element assuming it is the same material and width.

As we know V and I are NOT in phase, they are 90 degrees out of phase with respect to each other.

How come this is not so in a 1/4 wave or a 1/2 wave centre fed dipole ?

These 2 waves are not in phase they are 90 degrees out of phase and at any point remain 90 degrees out of phase with respect to each other.

https://www.electronics-notes.com/articles/antennas-propagation/dipole-antenna/current-voltage-waveforms-distribution.php

Cannot post the image alone, sorry.

<blockquote data-quote="TheBlaster" data-source="post: 776145" data-attributes="member: 58745">I&#039;ll repeat the question...as I have no idea who you are replying to Freecell, but make a guess it is me.&quot;By what means is V and I phase changing in a 1/4 wave by 90 degrees to make it purely resistive ? (compared to any other antenna)&quot;Your statement makes some sense as I recall what you say as Delta match based on this concept I recall from the exams. However why is current vs volts phase shifting along length of the elements ? I would say VF but this is unlikely as that is a constant along the element assuming it is the same material and width.As we know V and I are NOT in phase, they are 90 degrees out of phase with respect to each other.How come this is not so in a 1/4 wave or a 1/2 wave centre fed dipole ?These 2 waves are not in phase they are 90 degrees out of phase and at any point remain 90 degrees out of phase with respect to each other.<a href="https://www.electronics-notes.com/articles/antennas-propagation/dipole-antenna/current-voltage-waveforms-distribution.php" target="_blank">https://www.electronics-notes.com/articles/antennas-propagation/dipole-antenna/current-voltage-waveforms-distribution.php</a>Cannot post the image alone, sorry.</blockquote>

[QUOTE="TheBlaster, post: 776145, member: 58745"] I'll repeat the question...as I have no idea who you are replying to Freecell, but make a guess it is me. "By what means is V and I phase changing in a 1/4 wave by 90 degrees to make it purely resistive ? (compared to any other antenna)" Your statement makes some sense as I recall what you say as Delta match based on this concept I recall from the exams. However why is current vs volts phase shifting along length of the elements ? I would say VF but this is unlikely as that is a constant along the element assuming it is the same material and width. As we know V and I are NOT in phase, they are 90 degrees out of phase with respect to each other. How come this is not so in a 1/4 wave or a 1/2 wave centre fed dipole ? These 2 waves are not in phase they are 90 degrees out of phase and at any point remain 90 degrees out of phase with respect to each other. [URL]https://www.electronics-notes.com/articles/antennas-propagation/dipole-antenna/current-voltage-waveforms-distribution.php[/URL] Cannot post the image alone, sorry. [/QUOTE]

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