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The main difference between operation of a transmission lines and waveguide is that—
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- The latter are not distributed like transmission line
- The former can use stubs and quarter wave transformers unlike the latter
- Transmission lines use the principal mode of propagation and, therefore, don't suffer from low frequency cut-off
- Terms such as impedance matching and standing wave ratio can't be applied to waveguide
Correct Option: C
Transmission line does not suffer from cut-off frequency because wave travels in principle mode of operation. On other hand waveguide suffers from such problem.
