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What is Electrical Length?

The RF/microwave literature specifies that micro strip line is 43 degree at frequency of 5GHz. What does this mean? Let us understand this in detail below.

Electrical length =E= (l/Lambdaref) * 360 degree

E= T * Fref * 360 degree

This indicates that a line which is 1 ns long has an electrical length(E) of about 360 degree at frequency(Fref ) of 1GHz.

What is?

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RF and Wireless Terminologies