Patent US3396549A successfully refreshed from Google Patents.
Patent US3429255A successfully refreshed from Google Patents.
US5451965A
Expired / Lapsed
US
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Flexible antenna for a personal communications device
Assignee: Mitsubishi Electric Corp
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Filing: 1993-07-08
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Granted: 1995-09-19
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Expires: 2013-07-08
Abstract
Abstract An antenna for a portable radiotelephone which is configured in consideration of the nature of the electromagnetic wave and of the antenna-user relation in order to improve antenna performance in terms of received gain and directivity. Specifically, this is a multi-directional antenna configuration, including two or more planes of antenna oriented in different directions, for receiving electromagnetic waves in various angles or directions. The invention deals with at least two different cases in order to achieve satisfactory reception by a portable radiotelephone: when an antenna is relatively close to the user or a virtual ground, it should be provided normal to the user, and on the other hand, at another angle or parallel to the user when relatively far from the user or virtual ground.
Inventors
- 👤 Wataru Matsumoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:00
CPC Classifications
H; H01; H01Q; H01Q1/00; H01Q1/12; H01Q1/22; H01Q1/24; H01Q1/241; H01Q1/242; H01Q1/243; H01Q7/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
136 words
A loop antenna disposed substantially within a housing of a personal communications device and oriented with respect to a virtual ground plane, comprising: a first partial-loop antenna having a plurality of ends, the first partial-loop antenna having a directivity which is oriented to substantially cross said virtual ground plane; a second partial-loop antenna having a plurality of ends, a directivity of said second partial-loop antenna being oriented in a direction different from that of said first partial loop antenna; and a plurality of conductors for connecting said plurality of ends of said first and second partial-loop antennas; wherein at least one of said first and second partial-loop antennas is symmetric about an axis, said loop antenna further comprising a microphone disposed along said axis substantially in a center of said at least one symmetric partial-loop antenna.
Claim 2
Dependent Claim
136 words
A loop antenna disposed substantially within a housing of a personal communications device and oriented with respect to a virtual ground plane, comprising: a first partial-loop antenna having a plurality of ends, the first partial-loop antenna having a directivity which is oriented to substantially cross said virtual ground plane; a second partial-loop antenna having a plurality of ends, a directivity of said second partial-loop antenna being oriented in a direction different from that of said first partial loop antenna; and a plurality of conductors for connecting said plurality of ends of said first and second partial-loop antennas; wherein at least one of said first and second partial-loop antennas is symmetric about an axis, said loop antenna further comprising a microphone disposed along said axis substantially in a center of said at least one symmetric partial-loop antenna.
Claim 3
Dependent Claim
136 words
A loop antenna disposed substantially within a housing of a personal communications device and oriented with respect to a virtual ground plane, comprising: a first partial-loop antenna having a plurality of ends, the first partial-loop antenna having a directivity which is oriented to substantially cross said virtual ground plane; a second partial-loop antenna having a plurality of ends, a directivity of said second partial-loop antenna being oriented in a direction different from that of said first partial loop antenna; and a plurality of conductors for connecting said plurality of ends of said first and second partial-loop antennas; wherein at least one of said first and second partial-loop antennas is symmetric about an axis of symmetry, said antenna further comprising a matching capacitor disposed along said axis of symmetry within the at least one symmetric partial-loop antenna.
Claim 4
Dependent Claim
136 words
A loop antenna disposed substantially within a housing of a personal communications device and oriented with respect to a virtual ground plane, comprising: a first partial-loop antenna having a plurality of ends, the first partial-loop antenna having a directivity which is oriented to substantially cross said virtual ground plane; a second partial-loop antenna having a plurality of ends, a directivity of said second partial-loop antenna being oriented in a direction different from that of said first partial loop antenna; and a plurality of conductors for connecting said plurality of ends of said first and second partial-loop antennas; wherein at least one of said first and second partial-loop antennas is symmetric about an axis of symmetry, said antenna further comprising a matching capacitor disposed along said axis of symmetry within the at least one symmetric partial-loop antenna.
Claim 5
Dependent Claim
126 words
A loop antenna disposed substantially within a housing of a personal communications device and oriented with respect to a virtual ground plane, comprising: a first partial-loop antenna having a plurality of ends, the first partial-loop antenna having a directivity which is oriented to substantially cross said virtual ground plane; a second partial-loop antenna having a plurality of ends, a directivity of said second partial-loop antenna being oriented in a direction different from that of said first partial loop antenna; and a plurality of conductors for connecting said plurality of ends of said first and second partial-loop antennas; wherein at least the second partial-loop antenna is symmetrically disposed about an axis of symmetry and includes at least two matching capacitors symmetrically disposed about the axis of symmetry.
Claim 6
Dependent Claim
126 words
A loop antenna disposed substantially within a housing of a personal communications device and oriented with respect to a virtual ground plane, comprising: a first partial-loop antenna having a plurality of ends, the first partial-loop antenna having a directivity which is oriented to substantially cross said virtual ground plane; a second partial-loop antenna having a plurality of ends, a directivity of said second partial-loop antenna being oriented in a direction different from that of said first partial loop antenna; and a plurality of conductors for connecting said plurality of ends of said first and second partial-loop antennas; wherein at least the second partial-loop antenna is symmetrically disposed about an axis of symmetry and includes at least two matching capacitors symmetrically disposed about the axis of symmetry.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-09-18 | 1999-03-20 | 1999-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-09-18 | 2003-03-20 | 2003-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-09-18 | 2007-03-20 | 2007-09-19 | $7700.00 | Window Closed / Lapsed |