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Hi ,
I have for your small update, the smaller UHF tag on metal has the size 15x15x1,5mm, what is exciting , the tag is possible read with output power of a reader 100mW
Hi,
Yes, it is possible the detail information is available only under NDA. Please see a picture it is an application is marking of metal bottles .
UHF RFID tag is place directly on metal , thickness is only 1mm.
Hi,
My recomendation is software wilp-d , I think it is excelent sw for start , please check WIPL-D* --** High Frequency Electromagnetic Modeling and Simulation Software, what more in demo you can make full designe of small antennas.
More information about a patch antenna you can find on pages...
Hi,
Yes, I have tested, I have used a silver ink or special ink - mix of aluminiun + cooper.
The resuts are not bad, the performance of the antenna strond depent on the permitivity of a paper.
Please check the book RFID-enabled Sensor Design ISBN-10: 1-60783-981-4 , page 153-160 where you can...
Your question is not easy, as I far not on the market is not sw that will be able to analyze RFID system as a complex system . There is a lot of questions.
You have to split your task on some parts.
Create EM field on the base of your antennas , create model of vehicles , probability of moving...
Hi,
EM4298 is ISO18000-6 type A, B and C (EPC C1G2) communication standard compliant, frequency is 860-960MHz.
I do not have exactly the price, the final price of the UHF reader with EM is 180Eur, consequently I do not think that the price will be too high.
If you want I can ask the price.
I do...
Hi FvM,
My reply has two separate parts as I understand long88's question
1) you are right the picture is a simple λ/2 dipole
I fully agree with you that a yagi antenna is good solution for some (special) UHF RFID applications, this solution need only a little bit space around a yagi...
Hi,
I have attached the datasheet .
"Which type of wire for helix winding ?" It is the right question. I can only say please try Cu dia 0.5-1.2mm or Cu band.
Hi,
My recomendation is the book The RF in RFID , Daniel M.Dobkin page 241-283 , (special 282-283). I have done some antennas for readers, all depend what do you expect from the antenna (suitable is for an example dipol+ one element if you need the size the small asap)
Here is one...
Hi ,
1) use logarithmic spiral as a monopol, wire 0,8mm dia about 30mm
2) see page 287, book the RF in RFID Daniel M.Dobkin where you can find the solved example of a near-fied antenna
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