Data processing: generic control systems or specific application – Generic control system – apparatus or process – Having operator control interface
Patent
1997-09-17
2000-10-24
Gordon, Paul P.
Data processing: generic control systems or specific application
Generic control system, apparatus or process
Having operator control interface
700 85, 700 86, 341 22, 343702, 343866, G05B 902
Patent
active
061380504
ABSTRACT:
An antenna system for a radio frequency ("RF") wireless keyboard includes a metallic plate as a part of the antenna system. The metallic plate is located within the wireless keyboard. A RF transmitter is coupled to the metallic plate and an antenna wire which form an the antenna loop. The antenna loop may also be directly integrated into the metallic plate by creating a cut-out space in the metallic plate. The antenna system may also include the metallic plate directly coupled with the RF transmitter so that the metallic plate is a whip or dipole antenna. The RF transmitter generates RF signals associated with particular keyswitches of the wireless keyboard. The antenna system transmits the generated RF signals to a RF receiver that resides separately from, and that communicates with, the wireless keyboard.
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Itakura, H. and Tsunekawa, K., "Analytical Study of a Planer Loop Antenna With U-shape Notch," IEEE, XP 000588504, pp. 1140-1143, Jun. 18, 1995.
Lazzarotto Sergio
Schneider Gerhard
Teodoridis Viron
Gordon Paul P.
Logitech Inc.
Patel Ramesh
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