Hello experts! What is stubs in regards with transmission lines? I don't find any precise and point to point definition of it. Every where book tries to make us understand with a concept of 4 to 5 lines and this makes me confused. Please tell me the very precise and easiest definition of it. And why we use them? PS: I don't know where to post microwave or telecommunication's question that's why I posted in the General Physics category. Thank you.