EP0693733A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Short-distance communication antennas and methods of manufacture and use of same
Assignee: Dexerials Corp
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Filing: 1995-06-28
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Granted: —
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Expires: 2015-06-28
Abstract
Abstract A short-distance communication antenna (14, 16) can satisfactorily transmit and receive an information signal within a regulation range of the radio law. The short-distance communication antenna is provided on a card reader/writer (1) and enables the card reader/writer to communicate with a non-contacting information card (2) without being limited by the direction of the non-contacting information card upon reception. An embodiment of the antenna comprises a plurality of magnetic poles (40a, 40b), disposed on a magnetic member (40), to and from which a magnetic flux is transmitted and received. A coil (41) for transmitting and/or receiving the information signal is mounted on at least one of the magnetic poles. Another embodiment of the antenna includes a housing (335) having an aperture (334a) to and from which a magnetic flux is transmitted and received, and a coil (336), for transmitting and/or receiving the information signal, mounted on said housing. Furthermore, there are also provided methods of manufacturing and using the above short-distance communication antenna. The magnetic flux of the communication antenna is closed and a communication area is limited.
Inventors
- 👤 Susumu C/O Sony Chemicals Corporation Yanagibori
- 👤 Masahiro C/O Sony Chemicals Corporation Fujimoto
- 👤 Katsuhisa C/O Sony Chemicals Corporation Orihara
- 👤 Shoshichi C/O Sony Chemicals Corporation Saitoh
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 19:52
CPC Classifications
H; H01; H01Q; H01Q7/00; H01Q7/04; G; G06; G06K; G06K19/00; G06K19/06; G06K19/067; G06K19/07; G06K19/077; G06K19/07749; G06K19/07773; G06K19/07777; G06K19/07779; G06K19/07781; G06K7/00; G06K7/10; G06K7/10009; G06K7/10316; G06K7/10336
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
84 words
A communication antenna (14, 16) provided on a card reader/writer (1) for transmission and/or reception of an information signal by said card reader/writer (1) to and/or from a non-contacting information card (2) by electromagnetic induction, the antenna (14, 16) comprising: a magnetic member (40) having a plurality of magnetic poles (40a, 40b) and by which a magnetic flux is transmitted and received; and a coil (41) mounted on at least one of said magnetic poles (40a, 40b) for transmitting and/or receiving said information signal.
Claim 2
Dependent Claim
71 words
A communication antenna (14, 16) provided on a card reader/writer (1) for transmission and/or reception of an information signal by said card reader/writer (1) to and/or from a non-contacting information card (2) by electromagnetic induction, the antenna (14, 16) comprising: a housing (335) having an aperture (334a) by which a magnetic flux is transmitted and received; and a coil (336) mounted on said housing for transmitting and/or receiving said information signal.
Claim 3
Dependent Claim
71 words
A communication antenna (14, 16) provided on a card reader/writer (1) for transmission and/or reception of an information signal by said card reader/writer to and/or from a non-contacting information card (2) by electromagnetic induction, the antenna (14, 16) comprising: a housing (335) having an aperture (334a) by which a magnetic flux is transmitted and received; and a conductive coil (336) wound around a magnetic member (348) located inside said housing (335).
Claim 4
Dependent Claim
20 words
A communication antenna according to claim 2 or claim 3, wherein said housing (335) has a slit (337) formed therethrough.
Claim 5
Dependent Claim
39 words
A communication antenna according to claim 4, wherein said housing has a plurality of apertures (334a, 334b) and wherein said slit (337) is formed through said housing (335) so as to connect said apertures (334a, 334b) to each other.
Claim 6
Dependent Claim
24 words
A communication antenna according to any one of claims 2 to 5, wherein said coil (336) is formed of a flat type wire conductor.
Claim 7
Dependent Claim
62 words
A communication antenna (14, 16) provided on a card reader/writer (1) for transmission and/or reception of an information signal by said card reader/writer (1) to and/or from a non-contacting information card (2) by electromagnetic induction, the antenna (14, 16) comprising: a loop antenna (61) having a plurality of loops (63A, 63B) arranged such that current flows through adjacent loops in opposite directions.
Claim 8
Independent Claim
43 words
A method of manufacturing a communication antenna (14, 16), the method comprising the step of: winding an antenna conductor around a plurality of bobbins (202, 203) disposed with a predetermined spacing while said antenna conductor is alternately reciprocated between said bobbins (202, 203).
Claim 9
Dependent Claim
49 words
A method according to claim 11, wherein said bobbins (202, 203) are mounted on a reciprocable work table and wherein said antenna conductor is wound around said bobbins (202, 203) by an arm (208) having a reciprocating antenna conductor supply head (207) to which said antenna conductor is supplied.
Claim 10
Dependent Claim
135 words
A communication antenna (14, 16) provided on a card reader/writer (1) for transmission and/or reception of an information signal by said card reader/writer (1) to and/or from a non-contacting information card (2) by electromagnetic induction, the antenna comprising: a first antenna conductor (92); a second antenna conductor (93); and an adjustment strip (101); said first and second antenna conductors being formed on upper and lower surfaces (91a, 91b) of a substrate (91) of insulating material to form conductor patterns defining a plurality of loops (95A, 95B), said adjustment strip (101) being formed on a surface (91a, 91b) of the substrate (91), and said conductor patterns formed on the upper and lower surfaces of the insulating substrate (91) being connected via a through-hole (94) such that current flows in opposite directions through adjacent loops (95A, 95B).
Claim 11
Independent Claim
46 words
A method of using a communication antenna according to any one of claims 1 to 3, 7 and 10, wherein the antenna is disposed such that the magnetic flux direction of said antenna extends along the direction in which said non-contacting information card (2) is moved.
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