Wireless communication RF circuit and communication...

Details Wireless communication RF circuit and communication... Wireless communication RF circuit and communication...

2006-11-07

2006-11-07

Nguyen, Duc M. (Department: 2618)

Telecommunications

Transmitter and receiver at separate stations

Near field

C455S042000, C455S084000, C455S078000, C340S010100

Reexamination Certificate

active

07133641

ABSTRACT:
A wireless communication RF circuit includes a transmitting-and-receiving antenna, a modulator circuit, an SPST switching circuit, and a demodulator circuit, which are arranged in a sequence. Upon signal reception, the SPST switching circuit is switched ON, and the demodulator circuit extracts a signal wave from a signal received by the antenna and outputs the signal wave to a control circuit. Upon signal transmission, the SPST switching circuit is switched OFF, and the modulator circuit mixes transmission data supplied from the control circuit with a carrier and outputs the carrier to the antenna. Only a single antenna is required. Upon signal reception, the influence of the modulator circuit is negligible. Upon signal transmission, the SPST switching circuit is switched OFF, thus the effect of the demodulator circuit is negligible, which greatly reduces loss.

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