EP0746054A1
Expired / Lapsed
EP
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Antenna device and communication apparatus incorporating the same
Assignee: Murata Manufacturing Co Ltd
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Filing: 1996-05-23
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Granted: —
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Expires: 2016-05-23
Abstract
Abstract An antenna device has a dielectric block; a radiating electrode (1a) disposed in said dielectric block; and a coupler electrode (2b) disposed in said dielectric block so as to be electromagnetically coupled to said radiating electrode (1a). The antenna device has a reduced size despite the use of a dielectric material having a comparatively small dielectric constant, by virtue of the fact that the radiating electrode (1a) and the coupler electrode (2b) are arranged inside the dielectric block.
Inventors
- 👤 Kazunari Murata Manufacturing Co. Ltd. Kawahata
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 17:02
CPC Classifications
H; H01; H01Q; H01Q9/00; H01Q9/04; H01Q9/0407; H01Q9/045; H01Q9/0457; H01Q1/00; H01Q1/12; H01Q1/22; H01Q1/24; H01Q1/241; H01Q1/242; H01Q1/243
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
39 words
An antenna device, comprising: a dielectric block; a radiating electrode (1a; 3a, 3b) disposed in said dielectric block; and a coupler electrode (2b; 4b) disposed in said dielectric block so as to be electromagnetically coupled to said radiating electrode.
Claim 2
Dependent Claim
18 words
An antenna device according to Claim 1, wherein said radiating electrode (1a; 3a, 3b) is a planar electrode.
Claim 3
Dependent Claim
17 words
An antenna device according to Claim 1, wherein said coupler electrode (2b; 4b) is a planar electrode.
Claim 4
Dependent Claim
31 words
An antenna device according to Claim 3, wherein a major surface of said coupler electrode (2b; 4b) extends substantially in parallel with a major surface of said radiating electrode (1a; 2a).
Claim 5
Dependent Claim
31 words
An antenna device according to Claim 1, wherein said radiating electrode (1a; 3a, 3b) is extended to the exterior of said dielectric block so as to be accessible from the exterior.
Claim 6
Dependent Claim
30 words
An antenna device according to Claim 1, wherein said coupler electrode (2b; 4b) is extended to the exterior of said dielectric block so as to be accessible from the exterior.
Claim 7
Dependent Claim
91 words
A communication apparatus, comprising: a transmission/receiving control unit (24); a transmitter circuit (22) connected to said transmission/receiving control unit (24); a receiving circuit (23) connected to said transmission/receiving control unit (24); a power supply unit (25); and an antenna device; wherein said antenna device comprises: a dielectric block; a radiating electrode (1a; 3a, 3b) disposed in said dielectric block; and a coupler electrode (2b; 4b) disposed in said dielectric block so as to be electromagnetically coupled to said radiating electrode (1a; 3a, 3b) and connected to said power supply unit (25).
Claim 8
Dependent Claim
82 words
An antenna device, comprising: a dielectric block; radiating electrode strips (1a; 3a, 3b) disposed in said dielectric block; and coupler electrode strips (2b; 4b) disposed in said dielectric block so as to be electromagnetically coupled to said radiating electrode strips (1a; 3a, 3b); said radiating electrode strips (1a; 3a, 3b) and said coupler electrode strips (2b; 4b) being laminated alternately such that at least one of said radiating electrode strip (1a; 3a, 3b) is interposed between said coupler electrode strips (2b; 4b).
Claim 9
Dependent Claim
26 words
An antenna device according to Claim 8, wherein said plurality of radiating electrode strips includes at least a pair of radiating electrode strips having different areas.
Claim 10
Dependent Claim
43 words
An antenna device according to Claim 8, wherein at least one of said radiating electrode strips (1a; 3a, 3b) is connected to a radiating electrode which is extended to the exterior of said dielectric block so as to be accessible from the exterior.
Claim 11
Dependent Claim
37 words
An antenna device according to Claim 8, wherein said coupler electrode strips (2b) are connected to a coupler electrode which is extended to the exterior of said dielectric block so as to be accessible from the exterior.
Claim 12
Dependent Claim
74 words
An antenna device according to Claim 10, wherein at least one said radiating electrode strip includes: a first portion disposed (3a) in the vicinity of said coupler electrode strips (4b) so as to be electromagnetically coupled with said coupler electrode strips; and a second portion (3b) disposed in the vicinity of an outer surface of said dielectric block and forming a substantially smaller electromagnetic coupling with said coupler electrode strips than said first portion.
Claim 13
Dependent Claim
25 words
An antenna device according to Claim 12, wherein said first and second portions (3a, 3b) are connected to each other through a bridging strip (3c).
Claim 14
Dependent Claim
26 words
An antenna device according to claim 13, wherein said first portion (3a), said second portion (3b) and said bridging strip (3c) form a U-shaped conductor strip.
Claim 15
Independent Claim
185 words
A method of producing an antenna device, comprising the steps of: preparing a first dielectric ceramics green sheet (1); forming a radiating electrode pattern (1a; 3a, 3b) on said first dielectric ceramics green (1) sheet by applying a radiating electrode forming material thereon; preparing a second dielectric ceramics green sheet (2); forming a coupler electrode pattern (2b; 4b) on said second dielectric ceramics green sheet (2) by applying a coupler electrode forming material at a position where said coupler electrode pattern forms an electromagnetic coupling with said radiating electrode pattern when said first dielectric ceramics green sheet is superposed on said second dielectric ceramics green sheet; forming a laminated structure by alternately laminating at least one said first dielectric ceramics green sheet (1) and at least one said second dielectric ceramics green sheet (2); applying, to an outer surface of said laminated structure, a first external electrode material (1b; 3d) in electrical connection to said radiating electrode; applying, to an outer surface of said laminated structure, a second external electrode material (2a; 4a) in electrical connection to said coupler electrode; and firing said laminated structure.
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