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I have removed the reference to resonance concerning transforming open circuits to short circuits. If it is mentioned in the article it needs to be explained at length what resonance means in this context. I originally started writing a section on resonance for this article, but then realised I was describing stubs, which is a different article. That article could certainly use the material and it is now on my to do list. It is not necessary to introduce the complication of resonance here. λ/4 is a function of frequency and a shorted length of transmission line resonates at the frequency where its length is λ/4. In other words, stating that the length is λ/4 is synonymous with stating that it is at its resonant frequency, making the introduction of the concept superfluous. The frequency dependance of λ/4 is explicitly stated in the next paragraph. SpinningSpark 18:07, 11 August 2009 (UTC)
The lede needs a definition of purpose. The whole article seems to avoid its purpose with sentences that do not complete. 174.118.142.187 ( talk) 14:39, 17 January 2013 (UTC)
I've don't think I've ever seen a clumsier and unhelpful introduction to an article. A significant use of quarter-wave transformers is to match a load to a source impededance and this is achieved when the quarter wave line impedance is the square-root of the product of the load and source impedances. It takes pen and paper to work that out from the article. BTW, as well as applications in network and circuit matching, that's how AR coatings work - with impedance replaced by refractive index. 86.162.175.214 ( talk) 16:46, 8 November 2023 (UTC)
![]() | A fact from Quarter-wave impedance transformer appeared on Wikipedia's
Main Page in the
Did you know column on 18 August 2009 (
check views). The text of the entry was as follows:
| ![]() |
![]() | This article is rated Start-class on Wikipedia's
content assessment scale. It is of interest to the following WikiProjects: | ||||||||||
|
I have removed the reference to resonance concerning transforming open circuits to short circuits. If it is mentioned in the article it needs to be explained at length what resonance means in this context. I originally started writing a section on resonance for this article, but then realised I was describing stubs, which is a different article. That article could certainly use the material and it is now on my to do list. It is not necessary to introduce the complication of resonance here. λ/4 is a function of frequency and a shorted length of transmission line resonates at the frequency where its length is λ/4. In other words, stating that the length is λ/4 is synonymous with stating that it is at its resonant frequency, making the introduction of the concept superfluous. The frequency dependance of λ/4 is explicitly stated in the next paragraph. SpinningSpark 18:07, 11 August 2009 (UTC)
The lede needs a definition of purpose. The whole article seems to avoid its purpose with sentences that do not complete. 174.118.142.187 ( talk) 14:39, 17 January 2013 (UTC)
I've don't think I've ever seen a clumsier and unhelpful introduction to an article. A significant use of quarter-wave transformers is to match a load to a source impededance and this is achieved when the quarter wave line impedance is the square-root of the product of the load and source impedances. It takes pen and paper to work that out from the article. BTW, as well as applications in network and circuit matching, that's how AR coatings work - with impedance replaced by refractive index. 86.162.175.214 ( talk) 16:46, 8 November 2023 (UTC)