EP0394714A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Identification device with inductive antenna coupling
Assignee: Texas Instruments Deutschland GmbH
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Filing: 1990-04-04
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Granted: —
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Expires: 2010-04-04
Abstract
Abstract The invention relates to an identification device (10) consisting of a transmitter and receiver section (12) and an antenna connected thereto via an antenna coupling (16). Known identification devices are awkward to handle and trouble-prone in particular under rough use conditions. The new identification device is to be suitable in particular for mobile use and remain functionable even under rough ambient conditions. For this purpose in the antenna coupling (16) a dividable transformer (18) is arranged, a first transformer half having a core (20) and a winding (21) being accommodated in the transmitter and receiver section (12) and a second transformer half having a core (22) and a winding (23) being accommodated in the antenna (14). The two windings (21, 23) are inductively coupled in the connected state of the transmitter and receiver section (12) and the antenna (14).
Inventors
- 👤 Bruno G. Viereck
- 👤 Josef Schuermann
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 08:15
CPC Classifications
H; H01; H01Q; H01Q1/00; H01Q1/27; H01Q1/273; H01Q1/12; H01Q1/22; H01Q1/24
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
101 words
Identification device (10) consisting of a transmitter and receiver section (12) and an antenna (14) connected thereto via an antenna coupling (16), characterized in that in the antenna coupling (16) a dividable transformer (18) is arranged, a first transformer half having a core (20) and a winding (21) being received in the transmitter and receiver section (12) and a second transformer half having a core (22) and a winding (23) being received in the antenna (14), and that the two windings (21, 23) are inductively coupled in the connected state of the transmitter and receiver section (12) and the antenna (14).
Claim 2
Dependent Claim
101 words
Identification device (10) consisting of a transmitter and receiver section (12) and an antenna (14) connected thereto via an antenna coupling (16), characterized in that in the antenna coupling (16) a dividable transformer (18) is arranged, a first transformer half having a core (20) and a winding (21) being received in the transmitter and receiver section (12) and a second transformer half having a core (22) and a winding (23) being received in the antenna (14), and that the two windings (21, 23) are inductively coupled in the connected state of the transmitter and receiver section (12) and the antenna (14).
Claim 3
Dependent Claim
21 words
Device according to claim 1, characterized in that the two cores (20, 22) are each formed by a pot core half.
Claim 4
Dependent Claim
124 words
Device according to claim 2, characterized in that the transmitter and receiver section (12) comprises an antenna mounting flange (30) which is sealed by a diaphragm (26), the first pot core half (20) being arranged immediately behind the diaphragm (26) centrally in the antenna mounting flange (30), that the antenna (14) is held at one side in an antenna support (32) which is likewise sealed with a diaphragm (28), the second pot core half (22) being disposed immediately behind the diaphragm (28) centrally in the antenna support (32), and that the antenna support (32) is connected by means of a coupling ring (34) to the antenna mounting flange (30) in such a manner that the two diaphragms (26, 28) lie closely against each other.
Claim 5
Dependent Claim
50 words
Device according to claim 3, characterized in that in a groove (36) encircling the antenna tube support (32) a stop ring (38) is received, the groove (36) having an axial distance from the diaphragm (28) which is smaller than the length of the outer surface of the coupling ring (34).
Claim 6
Dependent Claim
108 words
Device according to any one of claims 1 to 4, characterized in that in the transmitter and receiver section (12) an insert region (50) is cut which has a rectangular cross-section and into which a correspondingly shaped insert member (52) of the antenna (14) can be inserted, the first transformer half being disposed in a side wall (54) of the insert region (50) and the second transformer half being disposed in the insert member (52) in such a manner that in the connected state the two transformer halves lie opposite each other, and that the insert member (52) is adapted to be locked in the insert region (50).
Claim 7
Dependent Claim
27 words
Device according to claim 5, characterized in that in the detent position between the insert member (52) and the insert region (50) a cavity (60) is formed.
Claim 8
Dependent Claim
23 words
Device according to claim 5 or 6, characterized in that between the insert member (52) and antenna (14) a hood (62) is disposed.
Claim 9
Dependent Claim
48 words
Device according to any one of claims 5, 6 or 7, characterized in that at the wall of the insert member (52) lying opposite the second transformer half a projection (64) is formed in such a manner that in the detent position it defines an air gap (24).
Claim 10
Dependent Claim
88 words
Device according to any one of claims 1 to 3, characterized in that in the transmitter and receiver section (12) an insert region (70) of circular cross-section is formed into which a correspondingly formed insert member (72) of the antenna (14) can be inserted, the first transformer half being arranged centrally directly in the bottom (74) of the insert region (70) whilst the second transformer half is arranged centrally in the end wall (76) and that the insert member (72) can be locked in the insert region (70).
Claim 11
Dependent Claim
27 words
Device according to claim 9, characterized in that the insert member (72) can be locked in the insert region (70) by means of a bayonet fastener (78).
Claim 12
Dependent Claim
31 words
Device according to claim 9 or 10, characterized in that the second transformer half is spring-loaded within the insert member (72) to define an air gap (24) in the detent position.
Claim 13
Dependent Claim
100 words
Device according to claim 1 or 2, characterized in that the transmitter and receiver section (12) comprises an antenna mounting flange (90) which is sealed by a diaphragm (26), the first transformer half being disposed directly behind the diaphragm (26) centrally in the antenna mounting flange (90), that the antenna (14) is held on one side in an antenna support (92) which comprises a projecting edge (94) adapted to be placed onto the antenna mounting flange (90), and that the second transformer half is arranged in the bottom (96) surrounded by the edge (94) centrally directly behind a diaphragm (28).
Claim 14
Dependent Claim
28 words
Device according to any one of the preceding claims, characterized in that the antenna (14) is divided and can be bent and folded up about a joint (100).
Claim 15
Dependent Claim
31 words
Device according to claim 13, characterized in that the antenna (14) can be locked against bending by a tube member (102) internally displaceable in the region of the separation line thereof.
Claim 16
Dependent Claim
20 words
Device according to claim 1, characterized in that the two cores (20, 22) are each formed by an E core.
References Cited (Backward Citations)
No citation records indexed.
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