FreeLists / si-list / [SI-LIST] Re: Diode Termination

["Shuo Jiao" <shuojiao@xxxxxxxxxx>]

Hi Ria,

As you have known, the "I" stands for the incident wave, and the "R"
stands for the reflected wave. The "T" stands for the transmitted wave.

R =3D T - I states the relationship between the three types of the wave.
It is like the sunshine incident on a plane water surface. The sunshine
in the water is the transmitted light wave while the incident and the
reflected light waves are above the water surface. The polarization of
dialect in microwave books can give you a more detailed and accurate
story about that by math.

About the "Exiting", I take it as that the transmitted wave enter the
load from the transmission line.

Regards,

Shuo=20
-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx]
On Behalf Of Ria R
Sent: Friday, December 14, 2007 12:21 PM
To: si-list@xxxxxxxxxxxxx
Subject: [SI-LIST] Diode Termination

All,
  I have a question on something I read about diode termination.
  Howard Johnson in one of his answers to a diode termination question
says the following:
One  equation  of interest regarding the  theory  of diode  terminations
is  the  relation  between  the incident   signal   amplitude
traveling   down   a transmission line (I), the amplitude of  the
signal reflected  at  the  end  of  a  line  (R),  and  the amplitude of
the signal that exits the line  and  is apparent at the load (T). =20

I am clear about "I" and "R". But what does "T" mean? I thought there
was just signal incident and signal reflected. Is there a signal
"Exiting"??

Also, if this is explained, the next question is, what does he mean by:

In  English,  the signal at the end of the  line  is the   superposition
of  whatever  came   in,   plus whatever  bounced back toward the
driver. This  same equation  may  be  re-written to express  "R"  as  a
function of "T" and "I":
  =20
       R =3D T - I

Can someone please clarify the above equation??

Thanks in advance.

Regards,
Ria.


=20
________________________________________________________________________
____________
Never miss a thing.  Make Yahoo your home page.=20
http://www.yahoo.com/r/hs

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