Definition
A hollow metal tube, usually rectangular in cross-section, used to carry high-frequency radio energy (microwaves) between components in a radar or microwave communication system. The inside surfaces reflect the electromagnetic waves and channel them along the length of the tube with very low loss.
Plain English
A hollow metal pipe that carries radar signals from one part of the system to another, the way a pipe carries water.
Context Anchor
Seen in aircraft weather radar and radar maintenance discussions, especially when describing how radar energy gets to and from the antenna.
Derivation
Literally a 'guide' for electromagnetic 'waves.' The name describes its job: it guides radio waves along a controlled path instead of letting them radiate freely into space.
Why Pilots Care
Allows reliable operation of radar systems used for weather detection and navigation.
Analogy
Think of it like a flashlight beam being sent through a mirrored tube — the energy bounces along the inside walls and comes out the far end, instead of spreading in all directions.
Intuition Check
A wave guide is not a guidebook, display, or navigation aid. In this context, it is a physical metal path that carries radar energy.
Example Sentence 1
The technician inspected the wave guide between the radar transmitter and the nose antenna for cracks and moisture.
Example Sentence 2
Proper alignment of the wave guide ensures maximum signal strength in the weather radar system.