UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - Radiation resistance and gain of ferrite antenna

regenfreak · 24th Feb 2021, 2:14 pm

I know Q and gain are not the same thing. That's why i have been looking for the mathematical relation between Gain = a function of variables like Q, frequency, ferrite geometry and properties. If you read G3RBJ's article, he has an equation for the induced voltage....

BBC TV white paper on ferrite by Poole. The methodology described here can be repeated with signal gen and a cheap spectrum analyzer(Meguro Loop test):

https://www.bbc.co.uk/rd/publications/whitepaper091

24th Feb 2021, 2:14 pm	#8
regenfreak Heptode Join Date: Nov 2018 Location: London SW16, UK. Posts: 655	Re: Radiation resistance and gain of ferrite antenna I know Q and gain are not the same thing. That's why i have been looking for the mathematical relation between Gain = a function of variables like Q, frequency, ferrite geometry and properties. If you read G3RBJ's article, he has an equation for the induced voltage.... BBC TV white paper on ferrite by Poole. The methodology described here can be repeated with signal gen and a cheap spectrum analyzer(Meguro Loop test): https://www.bbc.co.uk/rd/publications/whitepaper091 Last edited by regenfreak; 24th Feb 2021 at 2:36 pm.