Method and apparatus for coupling transceiver to power line carrier system

Patent 4697166 Issued on September 29, 1987. Estimated Expiration Date:

August 11, 2006. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

ELF communications system using HVDC transmission line as antenna
Patent #: 3993989
Issued on: 11/23/1976
Inventor: Held , et al.

Coupling arrangement for power line carrier systems
Patent #: 4066912
Issued on: 01/03/1978
Inventor: Wetherell

Method and apparatus for the two-way transmission of pulses
Patent #: 4097692
Issued on: 06/27/1978
Inventor: Felix

Filtering device for high-voltage power lines used as high-frequency transmission media Patent #: 4136319
Issued on: 01/23/1979
Inventor: Bourde

Inventors

Assignee

Nippon Colin Co., Ltd.

Application

No. 06/896111 filed on 08/11/1986

US Classes:

375/258, Transformer coupling333/167, Frequency domain filters utilizing only lumped parameters340/310.13, Noise reduction (e.g., filtering)340/538, Combined with power line340/538.12, Noise reduction (e.g., filtering)375/219, TRANSCEIVERS375/259SYSTEMS USING ALTERNATING OR PULSATING CURRENT

Examiners

Primary: Crosland, Donnie L.

Attorney, Agent or Firm

Hamilton; Gary W.

International Classes

H04B 3/54 (20060101)
H04B 3/56 (20060101)

Abstract

A method and apparatus for efficiently coupling a transceiver to an AC power line transmission system. The preferred embodiment of the coupling system comprises a line coupling network and first and second filter ports. The first filter port is connected to a resonant circuit having bandpass filtering characteristics adapted to the specific needs of the transmitter portion of the transceiver. The second filter port is isolated from the low impedance of the AC power line and is connected to a high quality factor filter having bandpass filtering characteristics adapted to the specific needs of the receiver portion of the transceiver.