High Frequency/High Perm CP antenna - RF Cafe Forums
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: High Frequency/High Perm CP antenna
Posted: Mon Nov 06, 2006 12:12 pm
Joined: Wed Jul 20, 2005
I am trying to design a CP patch
antenna at 24 GHz. The antenna is to be fed by CPW
and is EM coupled into the patch on the other side.
The substrate that I am using has a high permitivity
value of 12.9. I am using HFSS and would consider
myself an experienced user so I am confident the
of the values of axial ratio I am getting (which
is at best about 10dB)
I have tried chopping
the corners, alternating the angle of the feed,
alternating the type of feed (cap or inductive),
putting slots in the patch but all to no avail.
Is there something fundamental I am missing that
means I can't generate CP with the parameters set
More than 10,000 searchable pages indexed.
Your RF Cafe
single-handedly redefining what an engineering website should be.
Progenitor & Webmaster
(Seize the Day!)
My USAF radar shop