Reply to:   RE>UTP - Unshielded Twisted Pair

Twisted pair equations

d = diameter or wire
s = separation of wires centers
er= effective relative dielectric constant of medium between wires

Z = {120/(er^.5)}*ln(2*s/d)

Michael Royer
Senior Agency Compliance Engineer
BABT Approvals Liaison Engineer
N.E.T.  (Network Equipment Technologies)
800 Saginaw Drive 
Redwood City, CA 94063
Voice: 415-780-4218
Fax:     415-780-5004
[email protected]

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List-Post: [email protected]
Date: 3/27/97 9:40 AM
To: Michael Royer
From: [email protected]
Anyone have a general equation for calculating the 
characteristic impedence for a twisted pair? 
 
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