Every wire is a transmission line and/or antenna depending
on its surroundings (like whether it's parallel, orthogonal or
remote from the ground plane). Ones you might ignore at
100kHz may not be trivial at 5GHz, so where you get your
tutorials (and how stale, or where focused) probably factors
into whether they have "constructive or destructive
interference" in your cranium.
Every wire is a transmission line and/or antenna depending
on its surroundings (like whether it's parallel, orthogonal or
remote from the ground plane). Ones you might ignore at
100kHz may not be trivial at 5GHz, so where you get your
tutorials (and how stale, or where focused) probably factors
into whether they have "constructive or destructive
interference" in your cranium.
You need to read about this Subject in google, and ask when you get any doubt on particular section. These questions are very broad questions. Can't explained everything in posts.