[SI-LIST] AW: Patch Antenna Design for UHF RFID reader
- From: "Havermann, Gert" <Gert.Havermann@xxxxxxxxxxx>
- To: si-list@xxxxxxxxxxxxx
- Date: Thu, 12 Mar 2009 16:45:12 +0100
Hi Vinod,
Ist been a while since I did my last patch antenna, but since noone is
responding I'll give it a shot.
I don't see a problem with a microstrip patch antenna at the given bandwidth
and RF power level. The gain might be hard to meet over the whole bandwidth,
but should be ok with proper simulation. I prefer microstrip patch antenna
because ist quite easy to build. For metal patch antennas you have to deal with
a lot of tolerances (btw Aluminum works good for those antennas).
If you use an 3D simulator (CST, HFSS...) most of them come with examples in
patch antenna design. Sometimes those are a great starting point. If you go
down the first option, take a look at GIL1000 PCB material. Ist perfect for
antennas, and might help you to get the gain up to where it belongs.
Just my 2ct
BR
Gert
Please visit us at the Hannover Messe from April 20 to 24, 2009.
You can find us in hall 11, stand C13.
http://www.hannovermesse.de/
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-----Ursprüngliche Nachricht-----
Von: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx] Im
Auftrag von Vinod Kumar
Gesendet: Donnerstag, 12. März 2009 08:12
An: si-list@xxxxxxxxxxxxx
Betreff: [SI-LIST] Patch Antenna Design for UHF RFID reader
Hi All,
I want to design a patch antenna for UHF RFID reader. There are two options:
1. A microstrip patch antenna but the bandwidth will be less with this antenna.
2. A patch antenna with metal plates which can provide more bandwidth.
My requirements are:
A circularly polarized patch antenna with 6~9 dBi gain and 865 - 867MHz
bandwidth cover. Antenna should be able to radiate +30dBm (1W) RF power.
Can anybody suggest which option will be good?
Also where can I find good application notes for patch antenna design?
One more doubt I have here is how to select the metal for 2nd option. Which
material will be best suited for this?
Regards,
Vinod
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