January 1997
Beginner
435 pages
18h 29m
English
Content preview from Microwave and Wireless Communications Technology
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50 MICROWAVE TRANSMISSION LINES
where
D = diameter of the outer conductor
d = diameter of the inner conductor
Shielded Parallel Line
276 /
Zo = ~ log 2A
1-B2 /
I+B 2
(4-6)
where
A =s/d
B =s/D
Stripline
Go
377 T
w
(4- 7A)
where
et = relative dielectric constant of the printed wiring board (PWB)
T = thickness of the printed wiring board
W = width of the stripline conductor
The relative dielectric constant (et) used here differs from the normal dielectric
constant of the material used in the PWB. The relative and normal dielectric con-
stants move closer together for larger values of the ratio W/T.
EXAMPLE 4-2
A stripline ...
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