Back to results
US 6,396,392 B1Granted
High frequency network communications over various lines
AssigneeWire21, Inc.
InventorCharles Abraham
Life of this patent
Estimating the term…
Abstract
An apparatus for high frequency electrical line communication includes a transmitter, a receiver, a modem, and a coupler at each of two or more locations along an electrical line. The couplers have capacitive circuits serially connected with an air-core or dielectric-core transformer. The capacitive circuits resonate with the transformer at a preselected frequency. The coupler eliminates noise and is matched to the characteristic impedance of the line at the preselected frequency, which linearizes communication on the line and allows high speed data and voice communication over long distances.
Claims54
A communications apparatus for communicating electric signals through one or more electric lines having a characteristic impedance comprising:
- a modulator which modulates the electric signals to produce a modulated carrier signal having a first preselected frequency greater than or equal to 200 MHz;
- a transmitter operatively connected to the modulator and having an output impedance, said transmitter transmitting the modulated carrier signal;
- a first coupler connected between the electric line and the transmitter, said coupler matching the output impedance of the transmitter to the characteristic impedance of the electric line and communicating the modulated carrier signal to the electric line without significant phase distortion;
- a receiver having an input impedance, said receiver receiving the modulated carrier signal;
- a demodulator electrically connected to the receiver, said demodulator producing a demodulated carrier signal having a second preselected frequency greater than or equal to 200 Mhz by demodulating the modulated carrier signal;
- a second coupler connected between the electric line and the receiver for matching the input impedance of the receiver to the characteristic impedance of the electric line and communicating the modulated carrier signal to the receiver without significant phase distortion;
- the first coupler comprising a first transformer having a non-magnetic core, said transformer communicating the modulated carrier signal to the electric line without substantial phase distortion, and a coupling capacitor, that resonates with the transformer at the preselected frequency;
- the second coupler comprises a second transformer having a non-magnetic core which communicates the modulated carrier signal to the receiver without substantial phase distortion, and a coupling capacitor which resonates with the transformer at the preselected frequency;
- the first coupler comprising:
- a first conductive plate;
- a second conductive plate spaced apart from the first conductive plate by the non-magnetic core;
- a capacitor adapted to be connected between the first conductive plate and the electric line, wherein the first conductive plate and the capacitor are matched to the characteristic impedance of the electric line at a preselected bandwidth;
- the second coupler comprising:
- a first conductive plate;
- a second conductive plate spaced apart from the first conductive plate by the non-magnetic core;
- and
- a capacitor adapted to be connected between the first conductive plate and the electric line, wherein the first conductive plate and the capacitor are matched to the characteristic impedance of the electric line at a preselected bandwidth.
14 more elements
A communications apparatus for communicating electric signals through one or more electric lines having a characteristic impedance comprising:
- a modulator which modulates the electric signals to produce a modulated carrier signal having a preselected frequency greater than or equal to 200 MHz;
- a transmitter operatively connected to the modulator and having an output impedance, said transmitter transmitting the modulated carrier signal;
- a coupler connected between the electric line and the transmitter, said coupler matching the output impedance of the transmitter to the characteristic impedance of the electric line and communicating the modulated carrier signal to the electric line without significant phase distortion;
- said coupler comprising:
- a transformer having a non-magnetic core;
- and
- a coupling capacitor that resonates with the transformer at the preselected frequency;
- and
- said transformer comprising:
- a first conductive plate;
- a second conductive plate spaced apart from the first conductive plate by the non-magnetic core;
- and the capacitor being adapted to be connected between the first conductive plate and the electric line, wherein the first conductive plate and the capacitor are matched to the characteristic impedance of the electric line at a preselected bandwidth.
9 more elements
A communications apparatus for communicating electric signals through one or more electric lines having a characteristic impedance comprising:
- a first modem which produces a first modulated carrier signal having a first preselected frequency greater than or equal to 200 MHz and demodulates a second modulated carrier signal having a second preselected frequency greater than or equal to 200 MHz;
- a first transmitter having an output impedance, said transmitter connected to the first modem and transmitting the first modulated carrier signal;
- a first receiver having an input impedance, said receiver connected to the first modem and receiving the second modulated carrier signal;
- a first coupler connected between the electric lines and the first transmitter and the first receiver, said first coupler matching the output impedance of the first transmitter and the input impedance of the first receiver to the characteristic impedance of the electric lines and communicating the first and second modulated carrier signals without substantial phase distortion;
- a second modem which produces the second modulated carrier signal and demodulates the first modulated carrier signal;
- a second transmitter having an output impedance, said transmitter connected to the second modem and transmitting the second modulated carrier signal;
- a second receiver having an input impedance, said receiver connected to the second modem and receiving the first modulated carrier signal;
- and
- a second coupler connected between the electric lines and the second transmitter and the second receiver, said second coupler matching the output impedance of the second transmitter and the input impedance of the second receiver to the characteristic impedance of the electric lines and communicating the first and second modulated carrier signals without substantial phase distortion.
6 more elements
A coupler for use in a communications apparatus for communicating electric signals through one or more electric lines having a characteristic impedance, said coupler comprising:
- a solid-state transformer having a primary side;
- a capacitor adapted to be connected between the primary side and the electric line, wherein the primary side and the capacitor are matched to the characteristic impedance of the electric line at a preselected bandwidth.
A method for communicating electrical signals to one or more electric lines having a characteristic impedance comprising:
- producing a modulated carrier signal having a preselected frequency greater than or equal to 200 Mhz;
- transmitting the modulated carrier signal using a transmitter having an output impedance;
- and
- coupling the modulated carrier signal to the electric line without significant phase distortion using a coupler that matches the output impedance of the transmitter to the characteristic impedance of the electric line;
- said coupler comprising a transformer having a non-magnetic core, said transformer communicating the modulated carrier signal to the electric line without significant phase distortion;
- and
- a coupling capacitor that resonates with the transformer at the preselected frequency,
- said transformer comprising:
- a first conductive plate;
- a second conductive plate spaced apart from the first conductive plate by the non-magnetic core;
- and said coupling capacitor being connected between the first conductive plate and the electrical line, wherein the first conductive plate and the capacitor are matched to the characteristic impedance of the electric line at a preselected bandwidth.
8 more elements
Dependencies are inferred from the claim text.