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difference between Wave Impedance, Intrinsic Impedance etc

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mevadapratik

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Impedance

Hello,

Can anybody tell me what is the difference between Wave Impedance, Intrinsic Impedance, Input Impedance and Characteristics Impedance?

Thank you

Pratik
 


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Re: Impedance

Thanks..........but it would be your great help if you can tell me the specific difference between them.....

Thank you.

Pratik
 

Re: Impedance

The first two are for a medium or a wave itself.
The third is of a transmission line.
The fourth is the thevenin equivalent impedance of a part of the circuit
--
Amr Ali
www.embedded-tips.blogspot.com
 

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Re: Impedance

ok...i get you....can u please tell me what is the difference between wave and intrinsic impedance???

Thank you
 

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Re: Impedance

Wave impedance is the ratio between electric fields and magnetic fields of a propagating wave. Intrinsic impedance is the impedance of the medium that the wave propagates in. It is a characteristic of the medium. The wave impedance is equal to the intrinsic impedance.
--
Amr Ali
www.embedded-tips.blogspot.com
 

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Re: Impedance

Are wave impedance and intrinsic impedance same???????????

Thank you
 

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Re: Impedance

Same value but different physical meaning. Please read the first link I sent you.
--
Amr
 

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Re: Impedance

Than you....i got it...
 

Re: Impedance

amraldo said:
Wave impedance is the ratio between electric fields and magnetic fields of a propagating wave. Intrinsic impedance is the impedance of the medium that the wave propagates in. It is a characteristic of the medium. The wave impedance is equal to the intrinsic impedance.
--
Amr Ali
www.embedded-tips.blogspot.com
Click to expand...


Thanks Ali,

I wants to add few more points..

Input Impedance+characterstics impedance we define for bounded medium.
Wave impedance+Intrinsic impedance we define for Unbounded medium.

For free space intrinsic & wave impedance are same
Thanks
 

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The wave impedance is equal to the intrinsic impedance of the medium only when "For a transverse-electric-magnetic (TEM) plane wave travelling through a homogeneous medium, the wave impedance is everywhere equal to the intrinsic impedance of the medium." Source Wikipedia.

free space is a homogeneous medium that's why we have intrinsic & wave impedance are same
 

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I saw many wrong replays here (For example: wave and intrinsic impedance have same value only in TEM mode). Stick on what is mentioned in genuine references like Pozar book. I have just checked wikipedia.org and it seemed authentic.
 
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