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$\begingroup$ I'd agree that a single-turn "small loop" is not resonant by construction. If you wind with multiple turns, it is possible to have enough inter-turn capacitance to hit its self-resonant frequency. Some multi-turn loops try to spread out turns to minimize inter-turn capacitance so as to allow more turns before reaching self-resonance. So many turns might require a lot of copper, resulting in lowish-Q resonance due to too-thin wire. With only self-capacitance, it is a single-frequency antenna. $\endgroup$

glen_geek
– glen_geek

2024-09-24 02:11:41 +00:00
Commented Sep 24, 2024 at 2:11
$\begingroup$ So, what's going to be the length of the wire for a small loop? How do I calculate the length of the wire for 850 kHz? $\endgroup$

user29605
– user29605

2024-09-25 12:04:10 +00:00
Commented Sep 25, 2024 at 12:04

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