Harmonic communication system
First Claim
1. A communication system comprising transmitting means for transmitting a signal having a preselected frequency;
- a remote station comprising;
station receiving means for detecting said transmitted signal,information means for generating an information signal,power means connected to said station receiving means for producing a power signal from said detected signal to energize said information means, said power means comprising only a first two-terminal diode network comprising only semi-conductor diode means polarized in a single direction for conducting current in only one direction from one to the other of said two terminals of said first network.response signal generating means connected to said station receiving means for producing a harmonic signal of said transmitted signal and for modulating said harmonic signal with said information signal to produce a response signal, said response signal generating means comprising only a second two-terminal diode network comprising only semiconductor diode means polarized in a single direction for conducting current in only one direction from one to the other of said two terminals of said second network.and radiating means for radiating said response signal;
and a receiving station comprising means for demodulating said response signal to obtain said information signal.
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Accused Products
Abstract
A communication system comprising a transmitter for radiating a carrier frequency signal, which may be modulated, to a data station. The station includes a rectifier for rectifying the received carrier signal to provide energy to the station elements. A data source at the station produces a data signal representative of the information to be transmitted. A harmonic generator produces harmonics of the carrier signal and the harmonic signal is modulated with the data or information signal. An antenna radiates the modulated harmonic signal to a receiver which demodulates the received signal to extract the information therefrom. Thus, a completely self-contained and economic system is provided, since the carrier signal per se supplies the energy to operate the data station.
Additionally, the communication system may include a carrier signal having an address encoded therein and the station may comprise an address decoder so that only a selected addressed station will transmit the desired data at any one time.
62 Citations
35 Claims
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1. A communication system comprising transmitting means for transmitting a signal having a preselected frequency;
- a remote station comprising;
station receiving means for detecting said transmitted signal, information means for generating an information signal, power means connected to said station receiving means for producing a power signal from said detected signal to energize said information means, said power means comprising only a first two-terminal diode network comprising only semi-conductor diode means polarized in a single direction for conducting current in only one direction from one to the other of said two terminals of said first network. response signal generating means connected to said station receiving means for producing a harmonic signal of said transmitted signal and for modulating said harmonic signal with said information signal to produce a response signal, said response signal generating means comprising only a second two-terminal diode network comprising only semiconductor diode means polarized in a single direction for conducting current in only one direction from one to the other of said two terminals of said second network. and radiating means for radiating said response signal; and a receiving station comprising means for demodulating said response signal to obtain said information signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
- a remote station comprising;
- 18. A method for transmitting information to a remote station having no source of energy therein comprising transmitting a signal having a preselected frequency to the remote station, detecting said preselected frequency signal at said remote station and producing a power signal from the detected signal by applying the preselected frequency signal to only a first two-terminal diode network comprising only semiconductor diode means polarized in only one direction, energizing an information signal generator with said power signal to generate an information signal, producing a harmonic signal from said transmitted signal by applying said transmitted signal to only a second two-terminal diode network comprising only semiconductor diode means polarized in only one direction, and modulating said harmonic signal with said information signal by applying said information signal to said second diode network.
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26. A communication system comprising a transmitter having carrier signal generating means for generating a carrier signal having a preselected frequency, transmitter modulating means for modulating said carrier signal with a modulation signal, said modulation signal comprising reference and clock signal portions, and radiating means for radiating said modulated carrier signal;
- at least one remote station for receiving said modulated carrier signal, said remote station comprising demodulating means for demodulating said carrier signal to obtain said modulation signal, counting means responsive to said reference signal for producing a reference count and for incrementing said reference count in response to each of said clock signals, code means responsive to a predetermined count for producing an enabling signal, a modulation signal generator for generating a station modulation signal in response to said enabling signal, and station modulating means for modulating a harmonic signal of said carrier signal with said station modulation signal; and
a receiving station for receiving said modulated harmonic signal, said receiving station comprising receiving means for demodulating said modulated harmonic signal to obtain said station modulation signal. - View Dependent Claims (27, 28, 29, 30, 31, 32, 33, 34, 35)
- at least one remote station for receiving said modulated carrier signal, said remote station comprising demodulating means for demodulating said carrier signal to obtain said modulation signal, counting means responsive to said reference signal for producing a reference count and for incrementing said reference count in response to each of said clock signals, code means responsive to a predetermined count for producing an enabling signal, a modulation signal generator for generating a station modulation signal in response to said enabling signal, and station modulating means for modulating a harmonic signal of said carrier signal with said station modulation signal; and
Specification