Back of the envelope calculations
Estimate the wire delay
- Twisted pair: ~ 8.5 in/ns
- Coaxial cable: ~ 8 in/ns
- Microstrip: ~ 7 in/ns
- Stripline: ~ 5.5 in/ns
Check if the wire is short
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- If yes, wire will act like wire
- If no, wire may act like a transmission line