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About RF Cafe

Kirt Blattenberger - RF Cafe Webmaster

Copyright: 1996 - 2024
Webmaster:
    Kirt Blattenberger,

    BSEE - KB3UON

RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling 2 MB. Its primary purpose was to provide me with ready access to commonly needed formulas and reference material while performing my work as an RF system and circuit design engineer. The World Wide Web (Internet) was largely an unknown entity at the time and bandwidth was a scarce commodity. Dial-up modems blazed along at 14.4 kbps while typing up your telephone line, and a nice lady's voice announced "You've Got Mail" when a new message arrived...

All trademarks, copyrights, patents, and other rights of ownership to images and text used on the RF Cafe website are hereby acknowledged.

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Look Deep into My Eyes
Kirt's Cogitations™ #151

RF Cafe University"Factoids," "Kirt's Cogitations," and "Tech Topics Smorgasbord" are all manifestations of my rantings on various subjects relevant (usually) to the overall RF Cafe theme. All may be accessed on these pages:

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Look Deep into My Eyes

Fingerprint and retina scanners are the security measures of choice by spy movie producers and even the U.S. government, but in South Korea and Japan, vein recognition is the preferred method. The system is widely used in Asia for cultural reasons, since hygiene is a prime concern there. No contact with the vein recognition scanner is required since it uses an infrared beam to map veins on the back of the hand. Fingerprint and retina scanners require the scanee to physically touch the device. Vein recognition will start appearing in North America later in 2004.
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