CA2282891A1 - Communication system utilizing radiating transmission line - Google Patents

Communication system utilizing radiating transmission line Download PDF

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Publication number
CA2282891A1
CA2282891A1 CA002282891A CA2282891A CA2282891A1 CA 2282891 A1 CA2282891 A1 CA 2282891A1 CA 002282891 A CA002282891 A CA 002282891A CA 2282891 A CA2282891 A CA 2282891A CA 2282891 A1 CA2282891 A1 CA 2282891A1
Authority
CA
Canada
Prior art keywords
transmission line
communication system
audio
amplifier
signal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002282891A
Other languages
French (fr)
Other versions
CA2282891C (en
Inventor
Gerald Graham
Paul William Liber
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mine Radio Systems Inc
Original Assignee
Mine Radio Systems Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mine Radio Systems Inc filed Critical Mine Radio Systems Inc
Publication of CA2282891A1 publication Critical patent/CA2282891A1/en
Application granted granted Critical
Publication of CA2282891C publication Critical patent/CA2282891C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/36—Repeater circuits
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/155—Ground-based stations
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
    • H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/10—Adaptations for transmission by electrical cable

Abstract

A radio frequency communication system utilizing a radiating transmission line for simultaneously communicating audio and video signals is disclosed. The video signals convey video information and the audio signals convey narrow band computer data or audio information. The communication system also provides several separate channels allowing simultaneous audio communication between a plurality of mobile stations. The communication system is intended to be used in environments where radio waves do not propagate well, such as in underground mines. The communication system comprises at least one amplification unit connected to the radiating transmission line for periodically amplifying the audio and video signals. The amplification units have a separate amplifier for amplifying each of the signals and each amplifier is connected to the transmission line in parallel. The amplifiers utilize transistors operating in the linear region. The amplifiers used to amplify the signal which is being radiated by the transmission line has a limiting circuit to attenuate the signal prior to amplification in order maintain the signal within the linear region of the amplifier.
CA002282891A 1994-09-14 1994-09-14 Communication system utilizing radiating transmission line Expired - Fee Related CA2282891C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA002132036A CA2132036C (en) 1994-09-14 1994-09-14 Communication system utilizing radiating transmission line

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
CA002132036A Division CA2132036C (en) 1994-09-14 1994-09-14 Communication system utilizing radiating transmission line

Publications (2)

Publication Number Publication Date
CA2282891A1 true CA2282891A1 (en) 1996-03-15
CA2282891C CA2282891C (en) 2002-09-10

Family

ID=4154316

Family Applications (2)

Application Number Title Priority Date Filing Date
CA002282891A Expired - Fee Related CA2282891C (en) 1994-09-14 1994-09-14 Communication system utilizing radiating transmission line
CA002132036A Expired - Fee Related CA2132036C (en) 1994-09-14 1994-09-14 Communication system utilizing radiating transmission line

Family Applications After (1)

Application Number Title Priority Date Filing Date
CA002132036A Expired - Fee Related CA2132036C (en) 1994-09-14 1994-09-14 Communication system utilizing radiating transmission line

Country Status (1)

Country Link
CA (2) CA2282891C (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107968936B (en) * 2017-12-29 2023-09-29 长江勘测规划设计研究有限责任公司 Network transmission equipment applied to hydropower station underground factory building

Also Published As

Publication number Publication date
CA2132036C (en) 1999-12-14
CA2282891C (en) 2002-09-10
CA2132036A1 (en) 1996-03-15

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed

Effective date: 20140916