2.45GHz RFID reader

Why?

The readers are provided by the tag manufacturers.

...Jim Thompson

-- | James E.Thompson, P.E. | mens | | Analog Innovations, Inc. | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | Phoenix, Arizona Voice:(480)460-2350 | | | E-mail Address at Website Fax:(480)460-2142 | Brass Rat | |

| 1962 | I love to cook with wine. Sometimes I even put it in the food.

REASON: Our company will be a tag manufacturer

And where did the tag _design_ come from ?:-)

...Jim Thompson

-- | James E.Thompson, P.E. | mens | | Analog Innovations, Inc. | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | Phoenix, Arizona Voice:(480)460-2350 | | | E-mail Address at Website Fax:(480)460-2142 | Brass Rat | |

| 1962 | I love to cook with wine. Sometimes I even put it in the food.

Again... Why?

You will be among a million other tag and reader manufacturers in a well established marketplace.

If you are having to ask about the availability of chips to to do the R.F. side of the reader you are very likely unaware of the challenges you face in backsplatter tag energizing and reading.

I would hire a good R.F. consultant with prior experience in the art.

Read (:-)) between the lines... someone has reverse-engineered a tag chip, but forgot they needed to also steal a reader ;-)

SE Asia has no concern with patents or copyrights).

Scum!

...Jim Thompson

--
|  James E.Thompson, P.E.                           |    mens     |
|  Analog Innovations, Inc.                         |     et      |
|  Analog/Mixed-Signal ASIC's and Discrete Systems  |    manus    |
|  Phoenix, Arizona            Voice:(480)460-2350  |             |
|  E-mail Address at Website     Fax:(480)460-2142  |  Brass Rat  |
|       http://www.analog-innovations.com           |    1962     |
             
I love to cook with wine.      Sometimes I even put it in the food.

Well, ask the people who will be making the transmitters what format the tags transmit in (there is not only one) and go from there.

Thanks for all your replies, though almost useless. Is the purpose of this group to discuss circuit design? You might save your typing by ignoring my posts or saying 'Oh, it's secret and I will not tell you'. And a question: Are all of your chips or circuits invented by yourself and unique in the world?

ISO18000-4 is the best bet for the format, even though we are working on the Palomar protocol also. But RFID is a sensitive area - I doubt that you may not get many useful answers from people protecting their trade secrets.

Regards, Mikko

I failed to look at his name. I believe you are correct as to his intentions but with all the established players in this market, even in Asia, I fail to see how anyone can compete. Selling tags for EAS applications is like selling cloth's hangers. It's a penny here, penny there commodity.

Now active tags are a whole different story as you well know. I am currently working on a long range (100 meter+) Zigbee protocol design to work in a Mesh.

Yeah, and someone ostensibly posting under a Chinese name would likely as not carry all those nice trade secrets back to Cathay and next year, we'd all be deluged with trillions of RFID tags of Chinese manufacture. ;-)

--

"What is now proved was once only imagin'd." - William Blake, 1793.

the

challenges

art.

Great! Can you post the Pinyin? ;-)

Best regards, Spehro Pefhany

--
"it's the network..."                          "The Journey is the reward"
speff@interlog.com             Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog  Info for designers:  http://www.speff.com

It's a meaningless question. There are several RF tag protocols, and lots of special ones. You actually do need to find out what the RF tag transmits, in order to be able to specify a reciever.

Wo3 gao1 xing4 ji2 le!

I don't know about all, but many are. We made a passive tag for

870 MHz with 1kb flash memory and 4 m readout distance last year (with 0.5W radiated power, now the regulations allow more), but the ICs are not publicly available.

There may be several protocols, but *the* protocol at 2.45GHz is probably going to be ISO 18000-4. It would help, though, if Xiangyu specified what protocol he has in mind, ISO or something else. And whether it is a passive or active tag. At the time I started the

2.45GHz design I was not able to find complete RFID IC's and mis-used other short-range radio IC's instead. I know that at least Philips Semiconductors has been active with the ISO 18000 - they may have something publicly available by now.

Regards, Mikko

Another allegedly chinese one is "Man who waits for roast duck to fly into mouth must wait very, very long time".

Please figure out which RFID protocol you are interested in, then go through the IC manufacturer's catalogs (perhaps google) to find whether there are complete IC solutions available. What's available and what's not changes continuosly, and you get the most up-to-date answers only by looking yourself. If you can't find a complete solution, figure out which radio IC's can implement most of the functionality you will need, and design around those. It takes some work, but so it has taken for the rest of us, too.

Regards, Mikko

"Spehro Pefhany" schreef in bericht news: snipped-for-privacy@4ax.com...

Duibuqi, wo bu tai hui xie pinyin...

--
Thanks, Frank.
(remove 'x' and 'invalid' when replying by email)

Hi all, I'm depressive to see that my post brought a war. Sorry for my impoliteness in the 3rd post, though I was very angry then. I don't think this is a place to discuss whether or not we should do RF tag and reader. It is determined by the local market, national conditions and many other issues, and not the business of our engineers. My job is just to design a reader. I have some experiences in 13.56MHz RFID but nothing in UHF. After searching main IC manufactures' product web pages, I found little information of 2.45G transmitter chips, besides some power amplifiers. And in some BBS and forums, the popular topics are still on 13.56M. Being unfamiliar with this field, I want some information about my target. I don't want who can show me any schematics or design secrets. I've own power and intelligence to complete the task.

To Mikko Kiviranta: Special thanks to you for your valuable information. Our design is an ISO 18000-4 passive tag. It seems that major modules of reader should be implemented by discrete devices?

To some ones: Please don't induce a conclusion from empty. I confess that many reverse-engineerings are undertaking, in China, but also in the whole world, including US and EURO. But do you think one can produce a 2.45G chip just by copying? Or even, by some pestilent group posts?

To those who can speak Chinese: Wo3 hen3 gao1 xing4 zai4 zhe4 li3 neng2 kan4 dao4 zhong1 wen2 . Xi1 wang4 neng2 he2 ni3 men2 jiao1 peng2 you3. Na4 ge4 cheng2 yu3 de pin1 yin1 shi4: yi1 lao3 mai4 lao3

Hey, waster! I'm only trying to protect well-intentioned (though possibly gullible) original thinkers and patent-holders from the pestilence of foreign mass-imitation. GFY if you can't handle that.

--

"What is now proved was once only imagin'd." - William Blake, 1793.