Communications: radio wave antennas – Antennas – Balanced doublet - centerfed
Patent
1976-01-28
1977-07-05
Murray, Richard
Communications: radio wave antennas
Antennas
Balanced doublet - centerfed
179 1555T, 343178, H04B 100
Patent
active
040342956
ABSTRACT:
A radio communication system for simultaneous telecommunication between a calling station and a called station, in which an aural signal to be transmitted from the calling station is divided by sampling pulses in the form of clock pulses of low frequency and is then suitably compressed with respect to the time axis to produce periodic signal-free time regions in the compressor output, so that an aural signal similarly compressed with respect to the time axis and transmitted from the called station can be received within these signal-free time regions. The received aural signal is expanded with respect to the time axis so that the original aural signal output of the microphone in the called station can be reproduced and applied to the speaker in the calling station. A zero cross synchronizing circuit is connected to the compressor to attain zero cross synchronization of the time-divided compressed aural signal and such aural signal is applied to the transmitter.
REFERENCES:
patent: 3827052 (1974-07-01), Tanaka
patent: 3846827 (1974-11-01), Eppler, Jr.
patent: 3950617 (1976-04-01), Dildy, Jr.
Hayashi Setsuo
Kotezawa Katsutaka
Onodera Toshimi
Shimanuki Fujio
Chiba Communications Industries, Inc.
Murray Richard
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