EP0383292A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Electronic circuit device
Assignee: Fujitsu Ltd
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Filing: 1990-02-14
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Granted: —
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Expires: 2010-02-14
Abstract
Abstract An electronic circuit device comprises a printed circuit board (3) having a first surface on which a circuit pattern (6) is formed on which components (7) are mounted and a second surface on which a ground plane (5) is formed, a coupling stub (15) being formed in part of the circuit pattern; and a plane antenna having an antenna element (1), formed on one surface of a dielectric substrate (2). The printed circuit board (3) and the plane antenna are unified such that the second surface of the printed circuit board (3) and the other surface of the dielectric substrate (2) are opposed to each other and the coupling stub (15) is placed in position to be coupled to the antenna element (1).
Inventors
- 👤 Hideo Sugawara
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 09:21
CPC Classifications
H; H01; H01Q; H01Q9/00; H01Q9/04; H01Q9/0407; H01Q9/045; H01Q9/0457
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
122 words
An electronic circuit device comprising: a printed circuit board (3) having a first surface on which a circuit pattern (6) is formed on which components (7) are mounted and a second surface on which a ground plane (5) is formed, a coupling stub (15, 18, 20) being formed in part of said circuit pattern; a plane antenna (14) having an antenna element, formed on one surface of a dielectric substrate (2, 12), said printed circuit board (3) and said plane antenna (14) being unified such that the second surface of said printed circuit board and the other surface of said dielectric substrate are opposed to each other and said coupling stub is placed in position to be coupled to said antenna element.
Claim 2
Dependent Claim
122 words
An electronic circuit device comprising: a printed circuit board (3) having a first surface on which a circuit pattern (6) is formed on which components (7) are mounted and a second surface on which a ground plane (5) is formed, a coupling stub (15, 18, 20) being formed in part of said circuit pattern; a plane antenna (14) having an antenna element, formed on one surface of a dielectric substrate (2, 12), said printed circuit board (3) and said plane antenna (14) being unified such that the second surface of said printed circuit board and the other surface of said dielectric substrate are opposed to each other and said coupling stub is placed in position to be coupled to said antenna element.
Claim 3
Dependent Claim
27 words
The electronic circuit device according to claim 1, in which said antenna element has a square shape which measures half the wavelength of the service frequency band.
Claim 4
Dependent Claim
28 words
The electronic circuit device according to claim 1, in which said antenna element has a rectangular shape whose one side measures half the wavelength of the service frequency.
Claim 5
Dependent Claim
27 words
The electronic circuit device according to claim 2, in which said coupling stub is a quarter-wavelength-long open stub provided parallel to one side of said antenna element.
Claim 6
Dependent Claim
27 words
The electronic circuit device according to claim 2, in which said coupling stub is a quarter-wavelength-long shorted stub provided parallel to one side of said antenna element.
Claim 7
Dependent Claim
26 words
The electronic circuit device according to claim 2, in which said coupling stub comprises two stubs provided parallel to two adjoining sides of said antenna element.
Claim 8
Dependent Claim
32 words
The electronic circuit device according to claim 1, in which said dielectric substrate on which said antenna element is formed, is formed of part of a case surrounding said printed circuit board.
Claim 9
Dependent Claim
82 words
The electronic circuit device according to claim 1, in which said components mounted on said printed circuit board include a variable capacitance diode connected to said antenna element via a matching circuit and a signal generating circuit coupled to said variable capacitance diode for generating data to be transmitted, an unmodulated wave received by said plane antenna being phase modulated by said variable capacitance diode whose capacitance varies with the data from said signal generating circuit and transmitted outside said plane antenna.
References Cited (Backward Citations)
No citation records indexed.
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