25-07-2024, 04:29 PM
See
https://en.wikipedia.org/wiki/LC_circuit
Inductance of a 1 turn circular loop, that's not big enough to act like a folded dipole:
https://www.allaboutcircuits.com/tools/w...alculator/
(Hexagon and Octagon are approximately circular)
And for square:
https://www.allaboutcircuits.com/tools/r...alculator/
(a Diamond = square)
If there are nearly by multiple turns N, then it's approximately that answer x N squared. The inductance reduce as the turn spacing increases swn to a minimum of xN for loops in series.
Putting loops in parallel gives Q x N, and negligible change in inductance.
Rule of thumb:
https://www.edn.com/estimating-wire-loop...-thumb-15/
(needs adblock disabled to scroll)
https://en.wikipedia.org/wiki/Loop_antenna
Not such a good idea, but simple. Larger is better. https://swling.com/blog/2020/04/diy-how-...l-antenna/
There are loads of not very good articles.
A nanoVNC or similar will help you get the turns ratio right for 50 Ohms on a transformer used as a balun. The resistance ratio is turns ratio squared.
https://en.wikipedia.org/wiki/LC_circuit
Inductance of a 1 turn circular loop, that's not big enough to act like a folded dipole:
https://www.allaboutcircuits.com/tools/w...alculator/
(Hexagon and Octagon are approximately circular)
And for square:
https://www.allaboutcircuits.com/tools/r...alculator/
(a Diamond = square)
If there are nearly by multiple turns N, then it's approximately that answer x N squared. The inductance reduce as the turn spacing increases swn to a minimum of xN for loops in series.
Putting loops in parallel gives Q x N, and negligible change in inductance.
Rule of thumb:
https://www.edn.com/estimating-wire-loop...-thumb-15/
(needs adblock disabled to scroll)
https://en.wikipedia.org/wiki/Loop_antenna
Not such a good idea, but simple. Larger is better. https://swling.com/blog/2020/04/diy-how-...l-antenna/
There are loads of not very good articles.
A nanoVNC or similar will help you get the turns ratio right for 50 Ohms on a transformer used as a balun. The resistance ratio is turns ratio squared.
