Patent US5557562A successfully refreshed from Google Patents.
US5448249A
Expired / Lapsed
US
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Antenna device
Assignee: Murata Manufacturing Co Ltd
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Filing: 1993-02-26
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Granted: 1995-09-05
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Expires: 2013-02-26
Abstract
Abstract In an antenna device according to the present invention, a circular ring-shaped dielectric substrate has a radiation electrode formed on its one main surface and a ground electrode formed on its other main surface. In a vacant space portion of the dielectric substrate, a circular convex portion of a first base member is fitted, with an electronic circuit being fixed in the circular convex portion. The radiation electrode and the electronic circuit are connected to each other by a feeder line. Since the electronic circuit connected with the microstrip antenna is accommodated within the vacant space portion of the dielectric substrate, a compact and thin antenna device may be obtained.
Inventors
- 👤 Yuichi Kushihi
- 👤 Yoshiyuki Sonoda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 08:05
CPC Classifications
H; H01; H01Q; H01Q23/00; H01Q9/00; H01Q9/04; H01Q9/0407
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
236 words
An antenna device which includes a microstrip antenna and an electronic circuit connected to said microstrip antenna, said microstrip antenna comprising: a circular, ring-shaped dielectric substrate having first and second main surfaces, an outer peripheral face, and an inner peripheral face, and formed with a vacant space portion defined by said inner peripheral face at a central portion of said dielectric substrate; a radiation electrode formed on said first main surface of said dielectric substrate so as to extend over at least said vacant space portion; a ground electrode formed at least on the second main surface of said dielectric substrate; and a feeder line for connecting said radiation electrode and said electronic circuit, wherein said radiation electrode has a circular shape with a diameter larger than an inner diameter of said dielectric substrate defined by the inner peripheral face thereof, thereby covering an entire circular opening on said first main surface, with part of an under surface of said radiation electrode contacting said first main surface of said dielectric substrate, said dielectric substrate being fixedly mounted on a first circular base member formed with a circular hollow convex portion which is fitted into said vacant space portion, said electronic circuit being fixed within said convex portion, with a second base member being further fixed on an under surface of said first base member, said electronic circuit being connected to external circuits through an input/output terminal.
Claim 2
Dependent Claim
236 words
An antenna device which includes a microstrip antenna and an electronic circuit connected to said microstrip antenna, said microstrip antenna comprising: a circular, ring-shaped dielectric substrate having first and second main surfaces, an outer peripheral face, and an inner peripheral face, and formed with a vacant space portion defined by said inner peripheral face at a central portion of said dielectric substrate; a radiation electrode formed on said first main surface of said dielectric substrate so as to extend over at least said vacant space portion; a ground electrode formed at least on the second main surface of said dielectric substrate; and a feeder line for connecting said radiation electrode and said electronic circuit, wherein said radiation electrode has a circular shape with a diameter larger than an inner diameter of said dielectric substrate defined by the inner peripheral face thereof, thereby covering an entire circular opening on said first main surface, with part of an under surface of said radiation electrode contacting said first main surface of said dielectric substrate, said dielectric substrate being fixedly mounted on a first circular base member formed with a circular hollow convex portion which is fitted into said vacant space portion, said electronic circuit being fixed within said convex portion, with a second base member being further fixed on an under surface of said first base member, said electronic circuit being connected to external circuits through an input/output terminal.
Claim 3
Dependent Claim
48 words
An antenna device as claimed in claim 1, wherein said input/output terminal is connected at its one end to a circuit pattern of said electronic circuit, and is led out of the antenna device downwardly at its other end, through an insulator provided in the second base member.
Claim 4
Dependent Claim
84 words
An antenna device as claimed in claim 1, wherein said input/output terminal is connected at its one end to a circuit pattern of said electronic circuit, and is led out of the antenna device laterally at its other end, through an insulator provided in a groove means defined by a concave groove extending through the second main surface side of said dielectric substrate in a radial direction, and a hollow convex groove formed in said first base member, and fitted into said concave groove.
Claim 5
Dependent Claim
65 words
An antenna device as claimed in claim 1, wherein said input/output terminal is connected at its one end to a circuit pattern of said electronic circuit, and is led out of the antenna device laterally at its other end, through an insulator provided in a stepped portion formed in the first base member in a position confronting the second main surface of said dielectric substrate.
Claim 6
Dependent Claim
89 words
An antenna device as claimed in claim 1, wherein said dielectric substrate is formed at its second main surface, with two concave grooves in positions confronting each other through 180°, and said first base member is also formed with two convex grooves for fitting with said concave grooves in positions corresponding thereto, said input/output terminal being connected at its one end to a circuit pattern of said electronic circuit, and led out of the antenna device laterally at its other end, through an insulator provided in said convex groove.
Claim 7
Dependent Claim
79 words
An antenna device as claimed in claim 1, wherein said input/output terminal is connected at its one end to a circuit pattern of said electronic circuit, and is led out of the antenna device laterally at its other end, through an opening formed in a side wall of the circular convex portion of the first base member, a concave groove formed in the dielectric substrate in a position confronting said opening, and an insulator provided in said concave groove.
Claim 8
Dependent Claim
84 words
An antenna device as claimed in claim 1, wherein said input/output terminal is connected at its one end to a circuit pattern of said electronic circuit, and is led out of the antenna device laterally at its other end, through an opening formed in a side wall of the circular convex portion of the first base member formed with a stepped portion, a concave groove formed in the dielectric substrate in a position confronting said opening, and an insulator provided in said concave groove.
Claim 9
Dependent Claim
92 words
An antenna device as claimed in claim 1, wherein said input/output terminal is connected at its one end to a circuit pattern of said electronic circuit, and is led out of the antenna device laterally at its other end, through an opening formed in a side wall of the circular convex portion of the first base member, a concave groove formed in the dielectric substrate in a position confronting said opening with said ground electrode being removed at a portion for said concave groove and an insulator provided in said concave groove.
Claim 10
Dependent Claim
130 words
An antenna device as claimed in claim 1, wherein said input/output terminal is connected at its one end to a circuit pattern of said electronic circuit, and is led out of the antenna device laterally at its other end, through an opening formed in a side wall of the circular convex portion of the first base member, a first concave groove formed in the dielectric substrate in a position confronting said opening with said ground electrode being removed at a portion for said first concave groove, and an insulator provided in said first concave groove, said dielectric substrate being also formed with another concave groove in a position confronting said first concave groove through 180°, with said ground electrode being also removed at a portion for said another concave groove.
Claim 11
Dependent Claim
70 words
An antenna device as claimed in claim 1, wherein said input/output terminal is connected at its one end to a circuit pattern of said electronic circuit, and is led out of the antenna device downwardly at its other end, through an insulator provided in the second base member, said electronic circuit being fixedly mounted on said second base member within said circular hollow convex portion of said first base member.
Claim 12
Dependent Claim
71 words
An antenna device as claimed in claim 1, wherein said input/output terminal is connected at its one end to a circuit pattern of said electronic circuit, and is led out of the antenna device downwardly at its other end, through a porcelain insulator provided in the second base member, said ground electrode formed on said second main surface being further provided on an outer peripheral side surface of said dielectric substrate.
Claim 13
Dependent Claim
233 words
An antenna device which includes a microstrip antenna and an electronic circuit connected to said microstrip antenna, said microstrip antenna comprising: a dielectric substrate having first and second main surfaces, an outer peripheral face, and an inner peripheral face, and formed with a vacant space portion defined by said inner peripheral face at a central portion of said dielectric substrate; a radiation electrode formed on said first main surface of said dielectric substrate so as to extend over at least said vacant space portion; a ground electrode formed at least on the second main surface of said dielectric substrate; and a feeder line for connecting said radiation electrode and said electronic circuit, wherein said dielectric substrate has a circular flat plate shape closed on its first main surface, said radiation electrode having a circular shape with a diameter larger than an inner diameter of said dielectric substrate defined by the inner peripheral face thereof with, an under surface of said radiation electrode contacting said first main surface of said dielectric substrate, said dielectric substrate being fixedly mounted on a first circular base member formed with a circular hollow convex portion which is fitted into said vacant space portion, said electronic circuit being fixed at a ceiling portion thereof to an under surface of said base member, with a second base member being further fixed on an under surface of said first base member.
Claim 14
Dependent Claim
233 words
An antenna device which includes a microstrip antenna and an electronic circuit connected to said microstrip antenna, said microstrip antenna comprising: a dielectric substrate having first and second main surfaces, an outer peripheral face, and an inner peripheral face, and formed with a vacant space portion defined by said inner peripheral face at a central portion of said dielectric substrate; a radiation electrode formed on said first main surface of said dielectric substrate so as to extend over at least said vacant space portion; a ground electrode formed at least on the second main surface of said dielectric substrate; and a feeder line for connecting said radiation electrode and said electronic circuit, wherein said dielectric substrate has a circular flat plate shape closed on its first main surface, said radiation electrode having a circular shape with a diameter larger than an inner diameter of said dielectric substrate defined by the inner peripheral face thereof with, an under surface of said radiation electrode contacting said first main surface of said dielectric substrate, said dielectric substrate being fixedly mounted on a first circular base member formed with a circular hollow convex portion which is fitted into said vacant space portion, said electronic circuit being fixed at a ceiling portion thereof to an under surface of said base member, with a second base member being further fixed on an under surface of said first base member.
Claim 15
Dependent Claim
74 words
An antenna device as claimed in claim 12, wherein an input/output terminal is connected at its one end to a circuit pattern of said electronic circuit, and is led out of the antenna device downwardly at its other end, through an insulator provided in the second base member, said ground electrode formed on said second main surface of said dielectric substrate being further formed over an entire inner surface of said inner peripheral face.
Claim 16
Dependent Claim
63 words
An antenna device as claimed in claim 12, wherein an input/output terminal is connected at its one end to a circuit pattern of said electronic circuit, and is led out of the antenna device downwardly at its other end, through an insulator provided in the second base member, said ground electrode being formed only on said second main surface of said dielectric substrate.
References Cited (Backward Citations)
US3710337A
Cited
US4208660A
Cited
US4218682A
Cited
US4401988A
Cited
US4823136A
Cited
US4987425A
Cited
US5142698A
Cited
JPH0262703A
Cited
US5023624A
Cited
US5019829A
Cited
US5030961A
Cited
US5083132A
Cited
US5210542A
Cited
US5309163A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-09-04 | 1999-03-06 | 1999-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-09-04 | 2003-03-06 | 2003-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-09-04 | 2007-03-06 | 2007-09-05 | $7700.00 | Window Closed / Lapsed |