Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1990-07-25
1992-07-07
Kostak, Victor R.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358186, 358 83, H04N 718
Patent
active
051287552
ABSTRACT:
A wireless, real time video system provides a low power video transmitter wherein the base band video signal generated by the video camera directly modulates a radio frequency carrier signal to produce a very narrow band transmitter signal that is transmitted through a circularly polarized patch radiating antenna to a receiving antenna at a remote receiver site. The transmitted signal is picked up by the receiver antenna to be passed through a narrow band preselector filter to a low noise amplifier. The amplified signal is then applied to a mixer along with a fixed local oscillator frequency that is demodulated to reconstruct the original base band video signal for use in operating a video monitor or recorder connected by hard wired cable to the receiver unit. Both the transmitter and the receiver employ a phase locked loop and narrow ban filters to confine the transmitted signal and the receiver response within a very narrow frequency band to optimize the transmitter efficiency and prevent generation of and interference from extraneous signals.
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Kostak Victor R.
Wireless Technology, Inc.
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