Contact US

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here




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.


RE: Eplane&Hplane

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.


RE: Eplane&Hplane

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.

RE: Eplane&Hplane

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.

RE: Eplane&Hplane

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.

RE: Eplane&Hplane

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

E - easy to bend
H - hard to bend

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members! Already a Member? Login


Low-Volume Rapid Injection Molding With 3D Printed Molds
Learn methods and guidelines for using stereolithography (SLA) 3D printed molds in the injection molding process to lower costs and lead time. Discover how this hybrid manufacturing process enables on-demand mold fabrication to quickly produce small batches of thermoplastic parts. Download Now
Design for Additive Manufacturing (DfAM)
Examine how the principles of DfAM upend many of the long-standing rules around manufacturability - allowing engineers and designers to place a part’s function at the center of their design considerations. Download Now
Taking Control of Engineering Documents
This ebook covers tips for creating and managing workflows, security best practices and protection of intellectual property, Cloud vs. on-premise software solutions, CAD file management, compliance, and more. Download Now

Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close