The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 20, 1996
Filed:
Jan. 27, 1995
Masato Takayama, Kanagawa, JP;
Yasufumi Amari, Tokyo, JP;
Sony Corporation, Tokyo, JP;
Secom Corporation Limited, Tokyo, JP;
Abstract
An inductive radio communication system in which two sets of parallel lines are provided so as to be separated from each other at a predetermined distance therebetween along the track of a mobile unit, and a loop antenna having a double loop structure and attached on the mobile unit is disposed between the two sets of parallel lines. The loop antenna is arranged such that currents flow in the respective loops in opposite directions to each other at a certain instant. Levels of signals transmitted from the loop antenna to the parallel lines through electromagnetic coupling are added to each other when the signal levels are applied to the primary side of a level converting transformer, and then the output of the transformer is transmitted to a receiver of the ground station side, whereby the undesirable noises radiated to the outside is reduced and the coupling level between the antenna and the parallel lines through electromagnetic coupling is improved.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile