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[binyaocsu@163.com]

The waveguide has a broad wall and a narrow wall.

For the TE10 module, all of the books or papers to explain the E-plane and H-plane, the E-field is normal to the broad wall.

For example, on the page of the following link, it is said that the electric field is normal to the broad wall and the magnetic field line is normal to the short wall.
https://www.microwaves101.com/encyclopedias/waveguide-primer

Is it fixed in the rectangular waveguide?


Thanks a lot.

[admin]

E-plane, whether antennas or waveguides, means the plane that contains the E-field direction and the direction of propagation (two orthogonal directions define a plane).

The long wall will define the longest half-wavelength that will fit the boundary conditions within the waveguide. The boundary conditions are that the E-field (tangential) to metal must be zero. The longest half-wavelength is the lowest frequency that will propagate. So for the TE10 mode (not module), the E-field will always be normal to the longest wall.