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| | Reading between the lines: RFIDs confront the venerable bar code - 10/14/2004 - EDN (Site not responding. Last check: 2007-10-08) |
 | | Conversely, high-frequency tags and readers are more expensive and burn more power than their low-frequency peers, and environmental factors, such as packaging, moisture, and nearby metallic items, adversely attenuate high-frequency devices' signals more than their low-frequency counterparts. |
 | | You also need to be aware, when specifying and designing RFID gear, that a frequency freely usable in some parts of the world may not apply in others or may require an expensive and time-consuming licensing process. |
 | | Unlicensed frequency bands are also subject to spectrum corruption, a factor that anyone who has tried to simultaneously operate a microwave oven, a cordless phone, a Wi-Fi access point and client, and a Bluetooth-paired set of equipment has experienced (Reference 2). |
| www.edn.com /article/CA468418 (4433 words) |
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