A microstrip line with alumina substrate εr = 9 has a strip width w – McqOptions

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1.	A microstrip line with alumina substrate εr = 9 has a strip width w = 3 mm. Substrate thickness h = 0.5 mm.What is the approximate characteristic impedance of the line, assuming TEM wave propagation and negligible fringing field?
A.	50 Ω
B.	26 Ω
C.	21 Ω
D.	10 Ω
Answer» D. 10 Ω

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