Electromagnetics wireless transmission of Energy

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SUMMARY

The discussion centers on the principles of wireless energy transmission using LC resonant tanks. It establishes that while an LC circuit can transmit energy at its resonant frequency, the energy received by a second LC circuit is not equal to that transmitted due to the spreading of the electromagnetic field, which follows the inverse-square law. The conversation emphasizes the importance of understanding these principles rather than relying on misinformation from unreliable sources, such as YouTube. Ultimately, the conclusion is that the second coil will not receive all the power radiated from the first coil.

PREREQUISITES
  • Understanding of LC resonant circuits
  • Knowledge of electromagnetic field propagation
  • Familiarity with the inverse-square law
  • Basic principles of wireless energy transmission
NEXT STEPS
  • Research the principles of LC circuit design and resonance
  • Study the inverse-square law in the context of electromagnetic fields
  • Explore practical applications of wireless energy transmission technologies
  • Investigate common misconceptions in wireless energy transmission
USEFUL FOR

Electrical engineers, physics students, and anyone interested in the principles and applications of wireless energy transmission.

bocchesegiacomo
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There is an LC resonant tank connected at a power source at the resonant frequency and far away from it there is Another LC circuit with the same resonant frequency connected to a multimeter.
Assuming that there is no resistance and that all components are ideal the second coil will receive all the power radiated from the first coil?
 
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Is this homework?

If you describes one of those tanks as a radio transmitter and the other one as a radio receiver, what would you say the answer is?
 
bocchesegiacomo said:
There is an LC resonant tank connected at a power source at the resonant frequency and far away from it there is Another LC circuit with the same resonant frequency connected to a multimeter.
Assuming that there is no resistance and that all components are ideal the second coil will receive all the power radiated from the first coil?
Of course not. The transmitted field is spread throughout space. Use the inverse-square law and ratio by the receive coil area.

Don't believe everything you read about wireless energy transmission (there is much more misinformation than good information about it), and don't believe what you see on YouTube.
 
berkeman said:
Of course not. The transmitted field is spread throughout space. Use the inverse-square law and ratio by the receive coil area.

Don't believe everything you read about wireless energy transmission (there is much more misinformation than good information about it), and don't believe what you see on YouTube.
But if there is a resonant circuit the field concentrates on the receiving coil
 
anorlunda said:
Is this homework?

If you describes one of those tanks as a radio transmitter and the other one as a radio receiver, what would you say the answer is?
I don't know
 
bocchesegiacomo said:
But if there is a resonant circuit the field concentrates on the receiving coil

bocchesegiacomo said:
I don't know

It sounds like you don't understand the answer that @berkeman gave you. He's correct.
 
The OP has his answer. Thread Closed.
 

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