Talk:Dielectric resonator
Latest comment: 5 years ago by 130.246.58.72 in topic Resonant frequency
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Needs a picture
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I can't find a public domain image of a dielectric resonator. There are none on Commons. Can anyone help out? Cheers, ChetvornoTALK 00:19, 23 August 2013 (UTC)
- You could take an image from a US patent. In general, the images are public domain and are freely available online. There are quite a lot of patents on dielectric resonators, you just need to be careful not to pick something too unusual. There are also some drawings by me at Waveguide filter#Dielectric resonator filters. Feel free to use anything useful. I would be happy to create new images for this article if you indicate what you want a drawing of. SpinningSpark 10:41, 23 August 2013 (UTC)
- Thank you, that's a lot of help. I'll look at the patent drawings. Maybe if I pick one out, you could vet it, make sure it's a representative design? since it sounds like you know more about this topic than I do. Thanks for the offer of a drawing; I could probably draw an svg illustrating common resonators. Meanwhile, I'll use one of your great waveguide filter drawings. By the way, the Waveguide filter article, which you seem to have rewritten, is a really excellent example of a technical article. It's a better article about waveguides than Waveguide (electromagnetism). Thanks again for the help. --ChetvornoTALK 06:10, 24 August 2013 (UTC)
- I wrote waveguide filter from scratch and it is currently nominated for FA. Feel free to make comments and/or support there. I probably don't know as much you think, but the most common shape would seem to be a squat cylinder with or without a central hole. That is, the article's orgiginal description as "puck shaped" seems good. Longer cylinders, square bars and cylindrical dumbells also occur along with flat pieces intended for planar technologies. Where did you get "spherical from"? I marked it {{citation needed}} as it seems highly unusual. SpinningSpark 07:29, 24 August 2013 (UTC)
- Yeah, thanks for catching that. I was thinking of a YIG oscillator. The YIG sphere doesn't function as a normal dielectric resonator. --ChetvornoTALK 17:42, 24 August 2013 (UTC)
- I put it in as a see also. SpinningSpark 21:24, 24 August 2013 (UTC)
- Yeah, thanks for catching that. I was thinking of a YIG oscillator. The YIG sphere doesn't function as a normal dielectric resonator. --ChetvornoTALK 17:42, 24 August 2013 (UTC)
- I wrote waveguide filter from scratch and it is currently nominated for FA. Feel free to make comments and/or support there. I probably don't know as much you think, but the most common shape would seem to be a squat cylinder with or without a central hole. That is, the article's orgiginal description as "puck shaped" seems good. Longer cylinders, square bars and cylindrical dumbells also occur along with flat pieces intended for planar technologies. Where did you get "spherical from"? I marked it {{citation needed}} as it seems highly unusual. SpinningSpark 07:29, 24 August 2013 (UTC)
- Thank you, that's a lot of help. I'll look at the patent drawings. Maybe if I pick one out, you could vet it, make sure it's a representative design? since it sounds like you know more about this topic than I do. Thanks for the offer of a drawing; I could probably draw an svg illustrating common resonators. Meanwhile, I'll use one of your great waveguide filter drawings. By the way, the Waveguide filter article, which you seem to have rewritten, is a really excellent example of a technical article. It's a better article about waveguides than Waveguide (electromagnetism). Thanks again for the help. --ChetvornoTALK 06:10, 24 August 2013 (UTC)
Resonant frequency
editThe Theory of Operation section gives an expression for the resonant frequency of the TE01n mode which doesn't include n. This implies that all longitudinal modes have the same frequency. Can this be correct? Don't the longitudinal modes follow a dispersion relation as in a metallic cavity resonator? 212.159.76.165 (talk) 18:05, 17 January 2019 (UTC)
- I don't know offhand if the expression is correct, but it includes L, the length of the resonator, which is related to n. SpinningSpark 22:34, 17 January 2019 (UTC)
- That is probably true but then the relationship between L and n should be given. I modeled a simple dielectric resonator and the expression seems to be for the frequency of the TE010 mode but I can't find a reference to back that up.