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....How about looking at the theroy behind all this for the correct answers.
....If the antenna is the correct match to the feed line (at the operating frequency), the feedline length makes no difference except for loss over it's length.
....If however the antenna is not a match, reflected power returns to the source also with second trip losses on the same feedline..
....Since there is wave length involved, in makes a different where in the line you measure and if you change the feedline length. Because you now have something that is frequency/length sensitive with return power just the same as the antenna demensions are sensitive. The feedline becomes part of the whole match situation depending on where in the line you look at it.
....Also add to this that the farther you get from a mismatched antenna the lower the return loss you will see on a meter because of the longer feedline losses.. So don't let it fool you that the return power ratio looks better. You are just seeing less return power on the meter due to the cable losses.
....It's not considereing the whole theroy for the two different situations that confuses people.
Good luck.

<blockquote data-quote="KM3F" data-source="post: 339099" data-attributes="member: 18805">....How about looking at the theroy behind all this for the correct answers.....If the antenna is the correct match to the feed line (at the operating frequency), the feedline length makes no difference except for loss over it&#039;s length.....If however the antenna is not a match, reflected power returns to the source also with second trip losses on the same feedline......Since there is wave length involved, in makes a different where in the line you measure and if you change the feedline length.&nbsp; &nbsp; &nbsp; Because you now have something that is frequency/length sensitive with return power just the same as the antenna demensions are sensitive. The feedline becomes part of the whole match situation depending on where in the line you look at it.....Also add to this that the farther you get from a mismatched antenna the lower the return loss you will see on a meter because of the longer feedline losses.. So don&#039;t let it fool you that the return power ratio looks better. You are just seeing less return power on the meter&nbsp; due to the cable losses.....It&#039;s not considereing the whole theroy for the two different situations that confuses people.Good luck.</blockquote>

[QUOTE="KM3F, post: 339099, member: 18805"] ....How about looking at the theroy behind all this for the correct answers. ....If the antenna is the correct match to the feed line (at the operating frequency), the feedline length makes no difference except for loss over it's length. ....If however the antenna is not a match, reflected power returns to the source also with second trip losses on the same feedline.. ....Since there is wave length involved, in makes a different where in the line you measure and if you change the feedline length. Because you now have something that is frequency/length sensitive with return power just the same as the antenna demensions are sensitive. The feedline becomes part of the whole match situation depending on where in the line you look at it. ....Also add to this that the farther you get from a mismatched antenna the lower the return loss you will see on a meter because of the longer feedline losses.. So don't let it fool you that the return power ratio looks better. You are just seeing less return power on the meter due to the cable losses. ....It's not considereing the whole theroy for the two different situations that confuses people. Good luck. [/QUOTE]

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