|
 |
Which? Substrate - RF Cafe Forums
|
| Role
|
|
Post subject: Which? Substrate
Posted: Wed Dec 28, 2005 2:01 pm
|
|
|
|
|
Hello,
Please please could someone please suggest
an ideal substrate to use on a single element microstrip
patch for wireless-LAN applications, resonating
at about 2.44Ghz and also why its ideal.
I also want to play with two-element stacked
microstrip patch antennas and was hoping someone
could tell me wat the common substrates for this
are. Low cost substrate is a primary factor in both
cases. Thank you so much.
|
|
| |
|
 |
|
Johnny |
|
Post subject:
Posted: Wed Dec 28, 2005 2:20 pm
|
|
|
|
FR-4 is used almost exclusively, and is very inexpensive.
Check with any of the board fab houses. A couple
advertise on RF Cafe (no, I'm not one of them).
From a quick look here are the ones I see (might
as well support them since they essentially pay
for this website). Sorry if I missed a couple. I
think they all specialize in quick turn-around and
even small quantities. Electronic Prototypes
http://www.electronicprototypes.com/
Procyon PCB
http://www.procyonpcb.com/American Standard
Circuits
http://www.asc-i.com/Gator CAD
http://www.gatorcad.com/Johnny G.
in beautiful Wisconsin
|
|
| |
|
|
|
|
Guest |
|
Post subject:
Posted: Thu Dec 29, 2005 9:00 am
|
|
|
|
|
If use FR4 for a patch antenna you will be very
dissapointed in the results. FR4 material is a cheaply
made material that has loosely held tolerances for
dielectric constants and losses. You need to use
a microwave material like Rogers 5880.
|
|
| |
|
|
|
|
jives |
|
Post subject:
Posted: Fri Dec 30, 2005 10:19 am
|
|
Joined: Thu Jul 28, 2005
6:18 pm
Posts: 3 |
|
It also depends on the bandwidth you want and the
physical size you're looking for. I would recommend
Rogers 5880 or Rogers 6010 duroid, though they aren't
very cheap in terms of cost. If you're doing this
as part of a university research project, you may
be able to have them give you some free samples
which will be large enough to fabricate the antenna.
(Actually, I've done this before and they were very
accomodating).
|
|
| |
|
|
|
|
Karthik |
|
Post subject:
Posted: Fri Dec 30, 2005 1:32 pm
|
|
|
|
|
Hi,
FR4 may not be the best material to use.
You would find that the efficiency of the antenna
would be low compared to other substrates like Rogers
5880 if both the feed network and the patch are
on FR4. If you are trying something like an aperture
coupled patch, then, you could have the feed strucuture
on a lower loss material and the patch/radiating
element on FR4, though this would just be complicating
the design.
|
|
Posted 11/12/2012
|
|
|
|
|
