Advanced Qualification · A-007 Feedlines and matching · A-007-009-008
Compared with coaxial cable, microstripline:
- A must have much lower characteristic impedance
- B must have much higher characteristic impedance
- C has poorer shielding
- D has superior shielding
Correct answer: C — has poorer shielding. From the official ISED question bank, verified word for word.
Why
Microstripline is a flat conductor printed on top of a circuit board with a ground plane underneath, leaving the top side open to the air. The full explanation — and one for every question — is in Pro.
Practise this section
Feedlines and matching at the advanced level: transmission line theory, impedance transformation, stubs and matching networks.