http://www.rfidtoys.net/forum/ This is an XML content feed of; RFID Toys : Philosophy : Tech question on passive rfid’s Sat, 25 May 2013 20:24:15 +0000 Sat, 01 Jul 2006 07:37:14 +0000 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 10.11 360 www.rfidtoys.net/forum/RSS_post_feed.asp?TID=91 http://rfidtoys.net/images/RFIDToys.jpg http://www.rfidtoys.net/forum/ http://www.rfidtoys.net/forum/forum_posts.asp?TID=91&PID=429&title=tech-question-on-passive-rfids#429 Author: rfbase
Subject: 91
Posted: 01 July 2006 at 7:37am

As many in the business media, and government (FDA and DHS) are learning RFID is really a "family of technologies". While it is true that 13.56MHz RFID technology uses the H field, ~900MHz RFID technology in use by Wal-Mart utilizes the E field and the tag reflects the energy back to the reader (so called backscatter). Wal-Mart is investigating the use of H field at ~900MHz, but this technique has only recently been proposed (mostly to deal with liquids and metals).

Also, one doesn't refer to the RFID tag or reader as an "RFID". RFID stands for radio frequency identification, so would you really say to someone where can I buy some radio frequency identifications?" Not if English is your first language.

Consistent use of RFID terminology is required to ensure fruitful discussions. The privacy wackos love when people can't get their facts exactly correct because it allows for obfuscation and misinformation campaigns.
]]> Sat, 01 Jul 2006 07:37:14 +0000 http://www.rfidtoys.net/forum/forum_posts.asp?TID=91&PID=429&title=tech-question-on-passive-rfids#429 http://www.rfidtoys.net/forum/forum_posts.asp?TID=91&PID=406&title=tech-question-on-passive-rfids#406 Author: amal
Subject: 91
Posted: 21 June 2006 at 10:46am

check this post for some info about passive RFID: http://www.rfidtoys.net/forum/forum_posts.asp?TID=50&TPN =2

There are some other posts in here that also cover how it all works... just can't seem to find them right now ;)
]]> Wed, 21 Jun 2006 10:46:23 +0000 http://www.rfidtoys.net/forum/forum_posts.asp?TID=91&PID=406&title=tech-question-on-passive-rfids#406 http://www.rfidtoys.net/forum/forum_posts.asp?TID=91&PID=404&title=tech-question-on-passive-rfids#404 Author: Wakka
Subject: 91
Posted: 21 June 2006 at 10:41am

So how does the magnetic output of a reader actually "grab" ahold of a non-powered tag? I know it's by magnetic waves, but how does that work exactly? How does a magnetic wave (is 'wave' the righ word to use here?) power somethign enough for it to output a few bits of info?

Just curious because i'm sure people will be asking me this once i begin talking about rfid's with them
]]> Wed, 21 Jun 2006 10:41:25 +0000 http://www.rfidtoys.net/forum/forum_posts.asp?TID=91&PID=404&title=tech-question-on-passive-rfids#404