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Its not the length of the antenna that matters, it is the length of the individual elements. If the elements are electrically 1/2 wavelength long, or shorter than, and you have one on either side of the center feed point, all of both sides will be in phase. It isn't until one or both elements are longer than 1/2 wavelength that you begin to have out of phase currents. The only reason that two 1/4 wavelength elements is commonly used is it is easy to match to a feed line with reasonable SWR. This type of setup (the full wavelength antenna) will require some tuning, and when used on ham radio will most often use parallel feed line running to an antenna tuner for said tuning.

And Needle Bender, that second link above has a bunch of errors in it, you should find a better resource. Pretty much everything on that page is wrong.

The DB

<blockquote data-quote="The DB" data-source="post: 572658" data-attributes="member: 21346">Its not the length of the antenna that matters, it is the length of the individual elements.&nbsp; If the elements are electrically 1/2 wavelength long, or shorter than, and you have one on either side of the center feed point, all of both sides will be in phase.&nbsp; It isn&#039;t until one or both elements are longer than 1/2 wavelength that you begin to have out of phase currents.&nbsp; The only reason that two 1/4 wavelength elements is commonly used is it is easy to match to a feed line with reasonable SWR.&nbsp; This type of setup (the full wavelength antenna) will require some tuning, and when used on ham radio will most often use parallel feed line running to an antenna tuner for said tuning.And Needle Bender, that second link above has a bunch of errors in it, you should find a better resource.&nbsp; Pretty much everything on that page is wrong.<a href="http://hittman.us" target="_blank">The DB</a></blockquote>

[QUOTE="The DB, post: 572658, member: 21346"] Its not the length of the antenna that matters, it is the length of the individual elements. If the elements are electrically 1/2 wavelength long, or shorter than, and you have one on either side of the center feed point, all of both sides will be in phase. It isn't until one or both elements are longer than 1/2 wavelength that you begin to have out of phase currents. The only reason that two 1/4 wavelength elements is commonly used is it is easy to match to a feed line with reasonable SWR. This type of setup (the full wavelength antenna) will require some tuning, and when used on ham radio will most often use parallel feed line running to an antenna tuner for said tuning. And Needle Bender, that second link above has a bunch of errors in it, you should find a better resource. Pretty much everything on that page is wrong. [URL='http://hittman.us'][COLOR=#000000]The DB[/COLOR][/URL] [/QUOTE]

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