Inductance and resistance

Inductance L = miu * N * N * l / S, L and permeability miu, turns N, coil length l (not wire length), coil area S (S = 0.785 times diameter. S is not a cross-sectional area of the wire) And so on. 
Resistance R = rou * l / s, where the resistance is related to the resistivity rou, the length l, and the cross-sectional area s of the winding wire. Therefore, the inductance is the same, and the resistance is not necessarily equal.

1. The magnetic permeability is the same, that is, the materials are the same. To achieve the same, you must also consider the core material, the skeleton material, etc. Your wonderland is already so different, of course, the resistance and inductance will also be very different.

2. The distance is mainly related to signal power and signal frequency. Of course, inductance and capacitors (including the influence of distributed capacitance and distributed inductance, depending on frequency) will form a resonant network that is conducive to radiating electromagnetic waves, regardless of the diameter of the wire How much you count, the key is resonance, which will help you get the most signals and radiate them. The best conditions for receiving are: one, the direction of the alignment signal, two, impedance matching, and three, polarization matching.

3. The same magnetic permeability, the inductance is proportional to the square of the number of turns N. It has little to do with the diameter of the wire.