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M0GVZ,
Sure it's correct, and doesn't depend on feed line length or antenna length.
I definitely agree that SWR does not equate to efficiency -except- in how efficiently power/signal is transferred to/from the antenna. It means nothing as far as the efficiency of the antenna it's self is concerned. A 50 ohm carbon resistor, or a dummy load, is a perfect example of that. Very nice SWR, but a terrible radiator.
The part that's important between a resonant and non-resonant antenna is the un-neutralized reactances present in that antenna. Reactances do not contribute to producing/ratiating power (or receiving it, same thing just different direction). That's why you want to get rid of those reactances -in- the antenna. And is the definition of resonance.
Some electrical lengths tend to produce a more 'useable' radiation pattern than others. More 'useable' because it put's a signal where you want it, or receives a signal from where you want to get it.
- 'Doc

<blockquote data-quote="W5LZ" data-source="post: 376780" data-attributes="member: 129">M0GVZ,Sure it&#039;s correct, and doesn&#039;t depend on feed line length or antenna length.&nbsp; I definitely agree that SWR does not equate to efficiency -except- in how efficiently power/signal is transferred to/from the antenna.&nbsp; It means nothing as far as the efficiency of the antenna it&#039;s self is concerned.&nbsp; A 50 ohm carbon resistor, or a dummy load, is a perfect example of that.&nbsp; Very nice SWR, but a terrible radiator.The part that&#039;s important between a resonant and non-resonant antenna is the un-neutralized reactances present in that antenna.&nbsp; Reactances do not contribute to producing/ratiating power (or receiving it, same thing just different direction).&nbsp; That&#039;s why you want to get rid of those reactances -in- the antenna.&nbsp; And is the definition of resonance.Some electrical lengths tend to produce a more &#039;useable&#039; radiation pattern than others.&nbsp; More &#039;useable&#039; because it put&#039;s a signal where you want it, or receives a signal from where you want to get it.&nbsp;- &#039;Doc</blockquote>

[QUOTE="W5LZ, post: 376780, member: 129"] M0GVZ, Sure it's correct, and doesn't depend on feed line length or antenna length. I definitely agree that SWR does not equate to efficiency -except- in how efficiently power/signal is transferred to/from the antenna. It means nothing as far as the efficiency of the antenna it's self is concerned. A 50 ohm carbon resistor, or a dummy load, is a perfect example of that. Very nice SWR, but a terrible radiator. The part that's important between a resonant and non-resonant antenna is the un-neutralized reactances present in that antenna. Reactances do not contribute to producing/ratiating power (or receiving it, same thing just different direction). That's why you want to get rid of those reactances -in- the antenna. And is the definition of resonance. Some electrical lengths tend to produce a more 'useable' radiation pattern than others. More 'useable' because it put's a signal where you want it, or receives a signal from where you want to get it. - 'Doc [/QUOTE]

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