Radio communication system
First Claim
Patent Images
1. A paging system for a structure having a common AC power network comprising:
- a transmitting unit including;
an oscillator for providing a radio frequency carrier wave;
a modulator for applying an information signal to said carrier wave;
a power amplifier for amplifying the signal modulated carrier wave;
a power supply for providing operating current to said transmitting unit from said AC power network;
connect/disconnect means for coupling said power amplifier output signal and said power supply means to said AC power network whereby said network radiates said coupled output signal through said structure; and
at least one receiving unit having an antenna and demodulating circuit for receiving and demodulating said radiated signal.
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Accused Products
Abstract
A paging system for use in a limited area such as an office, a factory building, a hotel, or other public building wherein the existing electrical supply network is used as the antenna of either the transmitter or the receiver. The electrical supply network is capacitively coupled to the transmitter in the preferred embodiment and in addition supplies power to the unit.
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Citations
6 Claims
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1. A paging system for a structure having a common AC power network comprising:
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a transmitting unit including; an oscillator for providing a radio frequency carrier wave; a modulator for applying an information signal to said carrier wave; a power amplifier for amplifying the signal modulated carrier wave; a power supply for providing operating current to said transmitting unit from said AC power network; connect/disconnect means for coupling said power amplifier output signal and said power supply means to said AC power network whereby said network radiates said coupled output signal through said structure; and at least one receiving unit having an antenna and demodulating circuit for receiving and demodulating said radiated signal. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification