bloggingRFID
Thought leadership on embedded RFID and networked RFID from representatives of SkyeTek - the leader in embedded RFID

HF vs UHF: Choosing the Right Frequency

May 21, 2008 13:31 by jpeifer
With all of our customers, this is usually the first question that we need to address, “Should I use HF or UHF?” The easy answer is, of course, UHF allows for longer range, HF requires proximity. I read an article the other day about a vendor that believed this and tag price was all they really needed to know, and they are now starting to think they made the wrong choice.

In later posts we will go into more detail, but for now here is a quick overview of differences in tags and in readers. HF tags typically have a large user memory bank, memory on the tag that a user can use however they please. Certain HF tags also use secure communications protocols, protecting data as it moves between the reader and tag, and can provide anti-counterfeiting measures for high value products. But security and memory come at a price, literally, with some tags costing more than $1 per tag.

On the other end, UHF tags are almost the complete opposite. Smaller memory, usually only enough for an Electronic Product Code (EPC), no secure protocols, and long read range, all for much cheaper than HF tags. However, UHF tags with large user memory are starting to gain traction, and some tag manufacturers have started making inductive UHF tags, which have a more restricted range, but are extremely inexpensive. As a result, I wouldn’t be surprised to start seeing UHF gaining popularity in more markets.

But the story doesn’t end there. HF readers are much cheaper than UHF readers, NFC phones are becoming more popular, and contactless payment is becoming more pervasive (been to Best Buy lately?) all support for HF. So what does all this mean? In my opinion, it comes down to this: if you have many items to tag and few read points (like in a warehouse), UHF is a more logical choice, but if you have many read points in many places (such as cell phones) or you are tagging high value items, HF will be more beneficial. There are always exceptions, but this is a good start to making sure you don't end up with millions of the wrong type of tags.
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RFID Implants for Humans

April 20, 2008 12:56 by gwalter

Some commentary from Sean Loving, SkyeTek Founder:

Now there’s a bad idea. When I first heard about the Baja Beach Club application I loved it, but I thought “Oh boy, this is going to freak out lots of people”. Then the Mexican judges started chipping themselves, then came the FDA approval for VeriChip, and recently the chipping of some US officials. I say go ahead and chip yourself if you want - but don’t even think about mandating implants on me, because I promise to take up arms against that kind of nonsense. In my opinion the worst thing about implanting humans with RFID is how it gives fearful people something more to worry about. Indeed, using RFID to track humans really touches a nerve, doesn’t it? For example I recently heard that RFID helped prevent an infant from being abducted from a North Carolina hospital. My first thought was “Hooray RFID”. But after a little research I learned it was the parents that were attempting to “abduct” their own child. Then I thought “Oh no, RFID has now been used to keep a child from its parents”. Alas, it’s no surprise that all these new uses of RFID are bringing such questions and controversy to the spotlight in the public debate over RFID.

Waving your phone over the cash register to pay for your groceries will happen. Uptaking a new song into your iPod by scanning an RFID tag will happen. Having your oven receive cooking instructions from an RFID tag in the food packaging will happen. But although implanting RFID in humans is unfortunately already happening, I am not concerned that this is a sign of Armageddon. As a member of the world society, I do agree completely that we should not allow ourselves to trick ourselves into fulfilling the prophecy of Revelation 13:16-18, as some of the anti-RFID Christians warn. And although Revelation, like all good prophecies, has deep meaning and wisdom, fear not people of Earth because RFID is not the mark of the beast. For soon enough there will be DNA scanners that can access the unique code that God put into each of us. And so this debate will shift again, this time with new Bible verses as supporting evidence.

No, I am not afraid of the end of the world, but I am concerned that more fear than good will come from the reckless use of RFID. In my opinion RFID scanners, like DNA scanners or the Internet or any technology, should be used for the good of people. So I want to shift the debate away from how we can outlaw RFID, to a more pragmatic debate on how we can best utilize this simple but powerful technology. The SkyeTek inbox is open for suggestions. As an industry leader, SkyeTek is unique among other RFID technology providers because we focus on humane, positive uses of RFID, intentionally attempting to avoid and prevent the misuse of the technology. Beyond the mundane applications like manufacturing and inventory control, some of my favorites so far have been ScripTalk the talking Rx pill bottle reader for the blind, the various children’s museums like EdVenture and the Exploratorium and Wiley’s Woods, and the DR-1000 that was designed to assist caregivers in eliminating mistakes at the hospital bedside.

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