1. Basic concepts

1.1 Ratings

• Coordinate system

  A rectangular guide of cross-section a _g , b _g (a _g > b _g ) will be described in a coordinate system (x, y, z) such that x is the guide axis, y carries the long side and z is directed along the short side. The direction z > 0 is also the direction in which the antenna radiates. The radiating plane is located at z = 0.

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