"Rohit" wrote in message
oups.com...
Hi all,
I have placed 2 similar antennas (3 dB beamwidth = 90deg,
Polarization= LHC) on a PEC box with a small spacing between the 2.
Both antenna's are tilted and the first one is at 45deg and other at
135 deg from the horizontal so that both can cover 180 deg.

With this setup, in the simulation result i am observing heavy
distortion (about 10dB ripple or more) at 90 deg. What is the reason
for this heavy distortion. Is there any way i can remove the
distortion in the pattern without changing the antenna's position??

Thanks in advance,
Rohit


Hi Rohit

I consider your antenna to be one antenna with two driven elements.
Wherever the individual patterns from the elements overlap, they will add or
subtract depending on their relative phase.
Can you consider switching to alternately choose one element or the other?
Can you change the pattern shape so the patterns dont overlap? What are
your choices?

Jerry