E-plane and H-plane

A radiation pattern is the variation of the field intensity of an antenna as an angular function with respect to the axis. Also, the radiation pattern is a graphical depiction of the relative field strength transmitted from or received by the antenna.

A radiation pattern is usually represented graphically for the far-field conditions along the electrical field and the magnetic field vectors, along the direction of maximum radiation or E-plane and H-plane

The E-plane and H-plane are reference planes for linearly polarized antennas.

E-Plane

For a linearly polarized antenna, this is the plane containing the electric field vector and the direction of maximum radiation. The electric field or "E" plane determines the polarization or orientation of the radio wave. For a vertically-polarized antenna, the E-plane usually coincides with the vertical/elevation plane. For a horizontally-polarized antenna, the E-Plane usually concided with the horizontal/azimuth plane.

H-plane

In the case of the same linearly polarized antenna, this is the plane containing the magnetic field vector and the direction of maximum radiation. The magnetic field or "H" plane lies at a right angle to the "E" plane. For a vertically-polarized antenna, the H-plane usually coincides with the horizontal/azimuth plane. For a horizontally-polarized antenna, the H-plane usually coincides with the vertical/elevation plane.


Diagram showing the relationship between the E and H planes for a horizontally polarized directional yagi antenna.

Diagram showing the relationship between the E and H planes for a verticall polarized omnidirectional dipole antenna.

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