Because of the high maintenance needed to monitor and filter spammers from the RF Cafe Forums, I decided that it would
be best to just archive the pages to make all the good information posted in the past available for review. It is unfortunate
that the scumbags of the world ruin an otherwise useful venue for people wanting to exchanged useful ideas and views.
It seems that the more formal social media like Facebook pretty much dominate this kind of venue anymore anyway, so if
you would like to post something on RF Cafe's
page, please do.
Below are all of the forum threads, including all
the responses to the original posts.
Post subject: odd 3D IE3D simulation of a patch - help
Posted: Wed Apr 05, 2006 3:50 pm
Joined: Wed Apr 05, 2006 3:34 pm
I use IE3D to do my patch simulation.
Recently I did a test where I simulated a
simple patch antenna (it was at about 1GHz) and looked at the 3D radiation pattern, I saw that the
pattern is ending at the XY plane where the field is ZERO, than I changed the first layer so it won't be
a metal strip and drew a new ground plane, the simulation result where almost the same. and now for the
surprise: I added a thick layer of air under the ground plane (hoping it will help me get a pattern at
the negative Z direction) and what I got is a better Gain result! (over 1 dB better) and still no
radiation to the -Z direction.
Can anyone help me understand why? why the results were better
with a thick air layer under the ground, and more important why or how I can get a radiation resault in
the -Z direction.
(for port I used the "probe to patch" option with the ground plane as negative
and the patch as the positive).