Dr. Slick wrote:
W5DXP wrote in message ...

What must be realized is that the s-parameter reflection coefficients
are *PHYSICAL* reflection coefficients while 'rho' is not a physical
reflection coefficient. s11 and 'rho' do not usually have the same
value. There are physical constraints on s11. The s11 physical
constraints do not apply to 'rho'. s11 is the square root of the
ratio of Pref to Pfwd under special conditions. 'rho' is the square
root of the ratio of Pref to Pfwd under all conditions. There's a
big difference. s11 does not usually equal 'rho' anywhere except
at a one-port load.

[s11]=rho, rho being just the magnitude of the s11.

I just told you that is not always true.

s11 is the reflection coefficient when a2=0

|rho| is the reflection coefficient when a2=a2

In a Z0-matched system with reflections, they are NOT equal.
--
73, Cecil http://www.qsl.net/w5dxp



-----= Posted via Newsfeeds.Com, Uncensored Usenet News =-----
http://www.newsfeeds.com - The #1 Newsgroup Service in the World!
-----== Over 100,000 Newsgroups - 19 Different Servers! =-----