Signal receiving system

Details Signal receiving system Signal receiving system

2006-08-01

2006-08-01

Dinh, Trinh (Department: 2821)

Communications: radio wave antennas

Antennas

With coupling network or impedance in the leadin

C342S361000

Reexamination Certificate

active

07084829

ABSTRACT:
A signal receiving system includes a variable directivity antenna having its directivity varied in accordance with a control signal applied thereto. A control signal generator generating the control signal is provided in a receiving apparatus. The receiving apparatus includes also a modulator operating to ASK (amplitude-shift-keying) modulate a carrier with the control signal from the control signal generator into an ASK modulated signal. The ASK modulated signal is applied through a transmission line to the variable directivity antenna, and a controller associated with the variable directivity antenna demodulates the ASK modulated signal to recover the control signal for use in varying the directivity of the variable directivity antenna.

REFERENCES:
patent: 4737793 (1988-04-01), Munson et al.
patent: 4926187 (1990-05-01), Sugawara et al.
patent: 6384767 (2002-05-01), Takase et al.
patent: SHO 63-38574 (1988-10-01), None

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