A waveguide is a structure that directs electromagnetic waves, typically in the microwave and optical frequency ranges. It serves as a conduit for waves propagating from one point to another, often used in various applications such as telecommunications, radar, and fiber optics. ### Key Characteristics of Waveguides: 1. **Structure**: Waveguides can be made from various materials, including metals (for microwave frequencies) and dielectrics (as seen in optical fibers).
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