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freqzt
Joined: 13 Sep 2006
Posts: 123
Helped: 2
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 18 Apr 2007 3:32 cheap and best designs for rfid reader |
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Hi all,
I want to design an antenna for RFID reader. This reader works at 2.4 GHz. The bandwidth is 2.4 - 2.4835 GHz. What is the best antenna should I build? The antenna pattern must directional pattern. The simulator that available in my laboratory is HFSS and Micro-Stripes. It must be done in 1 month starting from now. I really need your help.
If anyone has the example of the antenna that i need, you can share it here.
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elmolla
Joined: 14 Jul 2005
Posts: 133
Helped: 16
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19 Apr 2007 15:02 best rfid reader |
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You're talking of a very small bandwidth, you can use any small bandwidth antenna.
The main problem is you need directivity, you can use a printed Yagi-Uda or just go for a microstrip phased array to get the directivity you need.
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19 Apr 2007 15:02 Ads |
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Azulykit
Joined: 18 Feb 2007
Posts: 851
Helped: 103
Location: All over the Map.
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09 May 2007 4:49 Re: the best antenna for RFID reader (it's not tag RFID) |
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If I had to get something really fast I would purchase a standard gain horn from someone like MI Technologies. You can add a coax to waveguide transition if a coaxial feed is more convenient.
The advantage here is that it is done and well documented. The gain will be in the vicinity of 15 dBi and the antenna will be very strong and relatively easy to mount. You would really have to work to damage it.
Once you have some additional time you could design something else. I know this is a design forum but I like to think of our job as solving problems quickly.
try looking here: h**p://www.mi-technologies.com/catalog/antennas/s12ghorn.pdf
A search on standard gain antennas would probably come up with a dozen other sources.
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