Built-in circuit elementferrite_antenna
Ferrite antenna
Coil on a ferrite rod, receives the magnetic field of the station: e = E·h_eff, h_eff = 2π·N·A·µ_eff/λ. Connect with a variable capacitor to form a resonant circuit.
Key data
- Category
- Radio
- Simulation model
- Built-in circuit element
- Reference prefix
- L
- Pins
- 2
- Land pattern
- Ferrite_Rod_D10_L60
Simulation model
The received AM station as an induced voltage (field strength × effective height of the rod) in series with the coil inductance and its resistance.
- Primitive
- FERRITE
Pins 2
| Pin | Name | Use |
|---|---|---|
| 1 | 1Passive pin | Coil end: to the tuning capacitor |
| 2 | 2Passive pin | Coil end: to the tuning capacitor |
Parameters 10
Inductance
LDefault250u H
Loss resistance
RDefault12 Ω
Quality factor Q = ωL/R ≈ 130 at 1 MHz
Turns
NDefault60
Rod diameter
DDefault10m m
Effective permeability
MUDefault80
Rod permeability µ_eff, typically 50–150 depending on length/diameter
Axis direction on the board
AXISDefault0 °
Direction of the antenna axis relative to the board (scene). Collinear axes couple most strongly, perpendicular axes not at all.
Local field strength
EDefault10m V/m
Medium wave: local station 10–100 mV/m, distant stations < 1 mV/m. 0 = no station
Transmitter frequency
FCDefault1M Hz
Tone frequency
FMDefault1k Hz
Modulation depth
MDefault50 %
PCB
Verified land pattern
Ferrite_Rod_D10_L60