Radio transmitter/receiver for wireless local area network

Details Radio transmitter/receiver for wireless local area network Radio transmitter/receiver for wireless local area network

1995-05-11

1998-11-17

Chin, Stephen

Pulse or digital communications

Systems using alternating or pulsating current

Angle modulation

455 86, 375295, H04L 2710

Patent

active

058387307

ABSTRACT:
A wireless local area network includes a radio transmitter/receiver for transmitting and receiving in accordance with the FCC rules for the ISM band. The receiver/transmitter supports spread spectrum frequency hopping in the 2.4 GHz ISM band and can be tuned to one of e.g. 82 different frequencies spaced at 1 MHz intervals. The radio transmitter/receiver is a low cost, low power, small size unit located on a printed circuit board in a PCMCIA form factor. Third order mixers are used in combination with a switched prescaler for a low cost and compact frequency control system capable of rapid switching of the radio between transmitting and receiving functions. No special shielding is needed between the frequency control circuitry and the receiver IF circuitry.

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