NDLI: Characteristics and applications of antenna cable for highway advisory radio

Content Provider	IEEE Xplore Digital Library
Author	Okamoto, K. Watari, T. Kashimura, N.
Copyright Year	1987
Description	Author affiliation: Meisei University (Okamoto, K.)
Abstract	We developed a suitable antenna cable, for an AM advisory radio to broadcast traffic information, which can make a zonal service area along a road. This cable generates an inductive field by a current induced on an earth-return circuit from an RF energy transmitting inside of the coaxial cable, which has an open type outer conductor. The inductive field can be controlled easily by number of turns of helically formed inner and outer conductors. The antenna cable has two merits; one is that the electrical properties are little influenced when being buried either in the ground or covered by snow or water, and another is that the inductive field hardly interferes an adjacent AM radio service area thanks to its big attenuation of a field towards transverse direction of the cable axis. A transmitter of 10W, 1620kHz produces a field of not less than 70dBµV/m within an approx. 3km section through the antenna cable. Since the first system for Japan Highway Public Corp. was constructed in 1985, the antenna cable has been installed 64km in total and being in good service for traffic information.
Starting Page	5
Ending Page	12
File Size	456666
Page Count	8
File Format	PDF
DOI	10.1109/VTC.1987.1623516
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1987-06-01
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Road transportation Coaxial cables Conductors Radio broadcasting Circuits Radio frequency Directive antennas Snow Water Attenuation
Content Type	Text
Resource Type	Article

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Autophon's assignments at Gotthard highway N2

An Intercity Coaxial Cable Electronic Highway

Design and Characteristics of Coaxial Cables for Community Antenna Television

The highway advisory radio service

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Matching optimization of half-wavelength dipole antennas for portable radio applications

Highway communication system using guidance-cable

Experimental Site for Design of Broadband Circuit of Individual or Low Community TV Antenna

The S-Function Method or Measuring Attenuation of Coaxial Radio-Frequency Cable

Characteristics and applications of antenna cable for highway advisory radio

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