Eplane&Hplane

[mirok]

hi everybody

I have a problem about underestanding E-plane And H-plane
definition. I will be grateful If anybody can describe it easier for me or know any website which can be helpful.

tanx

 

[DNAT]

Mirok, picture a cartesian coordinate system with the origin on the floor in front of you, the x-axis pointing straight at you, the y-axis perpendiculalry to the right, and the z-axis rising vertically out of the floor.

The H-plane would then be the floor (plane formed by the x and y axes). The H-plane can be translated in a linear fashion only, up and down the z-axis, by changing the value of z. It remains "horizontal" to the plane formed by the x and y axes. It's also like a plane that would slice horizontally through the earth at a fixed lattitude.

The E-plane, on the other hand, would be a vertical wall, perpendicular to the floor, and pivoting about a pole aligned with the z-axis. The E-plane can be pivoted only (not translated like the H-plane), by changing the reference angle formed between x and y axes. It would also be like picking a vertical plane to pass from the North pole downwards through opposite lines of longitude (i.e.180 degrees apart at the equator) onwards to the South pole.

The polar equivalent: the H-plane is defined by Theta=pi/2 for all values of Phi (0 to 2pi). The E-plane is defined by Phi=constant (often a reference angle of zero radians but not necessarily so) and all values of Theta = -pi to pi.

Hope that helps.

Cheers,
DT

 

[VEBill]

Another way of looking at it...

The E-plane is the plane of the electric field produced by the antenna elements and it is in the same plane as the elements. Imagine a dipole antenna with the electric field lines running from one element to the other.

The H-plane is the plane of the magnetic field and it is orthoganal to the E-plane and therefore it is at 90 degrees to the plane of the elements. Imagine a dipole with the currents in the elements creating rings of magnetic field surrounding them - the rings will be orthogonal to the elements.

 

[VEBill]

Further to previous, the term "*The* E-plane" might be confusing at first glance since there are so darn many E-planes around an antenna (one at every possible angle).

But, once you decide on a particular direction of radiation to be considered further, then you've also selected *THE* E-plane.

 

[mirok]

The problem is that I cann't find any relation between the Eplan in horn antenna (which seems to be the reference for our definition)and the Eplane in other antennas like dipole antenna.

 

[VEBill]

For your horn antenna, perhaps the old memory aid for waveguide might help:

E - easy to bend
H - hard to bend

 

[jbartos]

Suggestion: Visit

http://www.tdkrfsolutions.com/antennas.htm

http://www.aticourses.com/antennas_tutorial.htm

http://www.ee.olemiss.edu/darko/dra-pcfaaa.pdf

etc. for more info