finding a 50Ohm 13.56MHz antenna for RFID reader

[antnovice]

I am trying to build an RF-ID reader into an existing demo kit. Trouble is, the antenna supplied (connected via 50Ohm co-ax cable) with the reader is too big to squeeze inside the demo-kit case.
I need to find a 50Ohm 13.56MHz pcb-antenna that is max 5cm x 10cm or preferably is flexible so it can be squeezed in. Any ideas where I can get one, or how I might improvise. I am not an expert in this field - we are a software company primarily!

 

[VEBill]

Provide an Internet link to the demo kit so that we can determine details. Does it transmit? How much power? Is self interference going to be an issue?

 

[antnovice]

The Demo kit is a Personal Shopping Assistant (PSA) - see

http://www.multichannelretail.com/download/PSA_RFID_Login.jpg

for a picture. This picture has a RFID reader in the side - now we need a reader-antenna to be on the top - ie just under the outer skin of the case to the side of the screen. Output power from the reader is 200mW. I don't know if self-interference is an issue. We just need a 50Ohm 13.56MHz antenna to fit. Any ideas?

 

[nbucska]

I think a ferrit antenna would be the simplest solution
tuned to the output frequency and designed to be 50 Ohm

<nbucska@pcperipherals.com>

 

[antnovice]

Thanks for your inputs. I have resolved this problem - I found a supplier (

http://www.insidecontactless.com)

who supplied me with a small 50Ohm PCB antenna which works very well.