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Hi Raphael, This sounds very interesting. Can you give an example of a passive network that can match a small loop to a 50Ohm load across a wide band? Even matching on 2 amateur bands with the same

Hi Martin, The second part of our discussion – the mismatch loss that gets defined differently as: t (tau) = 4 ( R rad + R loss ) x R load/ | Z antenna + Z load |^2 Here we have an

I hope I did not create more confusion… Sent: Wednesday, November 2, 2022 6:39 AM To: [email protected] Subject: Re: [loopantennas] Optimizing Small Untuned Loop Antennas Hi Raphael,

Hi Raphael, Can you confirm the following statements, in order to improve my understanding of some basic concepts. I assume that by efficiency you mean radiation efficiency (ratio of the radiated

Sigh. I've got what I need to know. IF you read through that thread (doubtful you did, and understanding, comprehending being the next step up) then I need not add any more. Thank you for your

Correction in wording – instead of number of loops read number of turns… Sent: Tuesday, November 1, 2022 1:20 PM To: [email protected] Subject: Re: FW: [loopantennas] Optimizing Small

Martin, Regardless the type of loop antenna untuned or tuned the radiation resistance gets calculated the same way because the radiation resistance is: R rad.= 31200 x (NxA / wavelength of

Hello Jim, STLcalc uses the formula presented in the 24th edition of the Antenna Book, and that is based on the Kraus equation as you have have noted. I keep the loop length, including the loop

Unfortunately, I'm now even more confused... But it think this is simply due to the definitions and how they are being used. A quick question. If we have a 'broadband' un-tuned loop, and then tune

Curious ... what formula does STLcalc use? Here is a discussion where the Kraus equation has been found to be incorrect in yielding the loop feedpoint

Check my qrz.com

Simon,? yes, but I would say "... can be...",? depending on given constraints... Building a low-loss TX loop is quite a challenge! Michael 2E0IHW

Hi Michael Tx loops are MUCH better than shrivelled up verticals and hence no space for useful radials on low bands.. See my qrz.com Simon g0zen

glug, glug, glug.... I am out of my depth here :-) TX loops : last chance saloon if in real-estate penury.? Might be better or worse than a shrivelled vertical etc. RX loops : whatever maths and

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Mike, My point was not who likes or dislikes small loop antennas but for any antenna can be calculated or estimated the gain figure or its antenna factor. During my dialog with well respected Martin

Rafael, The article is about a shielded tuned loop with a split capacitor matching to 50 Ohm. 30dB loss on 7MHz compared to a full size dipole is not bad at all for a receive only antenna. Maybe a

Good evening Martin, I found for you a paper published by Duffy at his blog https://owenduffy.net/antenna/shieldedloop/index.htm Please read this article especially at its end where he points out

The attachments on my earlier posts regarding Linux updates were stripped somewhere along the way. So I have placed the attachments for both Linux Mint and Raspberry Pi OS in the following Dropbox

The mentioned article/file is uploaded as “Antenna_Paper_Part3.pdf” Sent: Sunday, October 30, 2022 3:37 PM To: [email protected] Subject: Re: [loopantennas] Optimizing Small Untuned Loop