US4829591A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable radio
Assignee: NEC Corp
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Filing: 1986-08-19
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Granted: 1989-05-09
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Expires: 2006-08-19
Abstract
Abstract A portable transceiver has a narrow band square microstrip antenna connected to a first radio receiver, a wideband sleeve or whip antenna connected to an associated duplexer, and a second radio receiver and a transmitter both connected to the wideband antenna via the duplexer. The square microstrip antenna if formed of a conductive emission plate and a conductive ground plate joined by a conductive connector plate. A housing enclosing the transceiver has an earphone and microphone set in its front side, the microstrip antenna under its back side, and the wideband sleeve or whip antenna mounted upright on its top side.
Inventors
- 👤 Kazuya Hashimoto
- 👤 Hiroshi Asazawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:13
CPC Classifications
H; H01; H01Q; H01Q1/00; H01Q1/12; H01Q1/22; H01Q1/24; H01Q1/241; H01Q1/242; H01Q21/00; H01Q21/28; H01Q9/00; H01Q9/04; H01Q9/0407; H01Q9/0421; H01Q9/30
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
125 words
A portable transceiver comprising a housing having a wideband antenna attached to and projecting from a first housing side, a narrow band antenna enclosed within said housing at a first location which is removed from said wideband antenna, transmitter and receiver transducers mounted on said housing at locations opposing said first location, a first receiver circuit means coupled to reproduce signals picked up by said narrow band antenna and to apply them to said receiver transducer, a duplexer means, a second receiver circuit means and a transmitter circuit means coupled through said duplexer means to said wideband antenna, said second receiver circuit means being coupled to said receiver transducer so that diversity reception is performed, said transmitter circuit means being coupled to said transmitter transducer.
Claim 2
Dependent Claim
125 words
A portable transceiver comprising a housing having a wideband antenna attached to and projecting from a first housing side, a narrow band antenna enclosed within said housing at a first location which is removed from said wideband antenna, transmitter and receiver transducers mounted on said housing at locations opposing said first location, a first receiver circuit means coupled to reproduce signals picked up by said narrow band antenna and to apply them to said receiver transducer, a duplexer means, a second receiver circuit means and a transmitter circuit means coupled through said duplexer means to said wideband antenna, said second receiver circuit means being coupled to said receiver transducer so that diversity reception is performed, said transmitter circuit means being coupled to said transmitter transducer.
Claim 3
Dependent Claim
24 words
The transceiver of claim 1 wherein said narrow band antenna includes a ground plate connected via a connector plate to a conductive emission plate.
Claim 4
Dependent Claim
15 words
The transceiver of claim 2 wherein said narrow band antenna is a square microstrip antenna.
Claim 5
Dependent Claim
45 words
The transceiver of claim 3 wherein said transmitter and receiver transducers are at spaced locations on said housing which induces a user to hold a particular end of said housing, and said first location is at a position which is remote from said particular end.
Claim 6
Dependent Claim
13 words
The transceiver of claim 4 wherein said wideband antenna is a sleeve antenna.
Claim 7
Dependent Claim
13 words
The transceiver of claim 4 wherein said wideband antenna is a whip antenna.
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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) | 1992-05-08 | 1992-11-07 | 1993-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-08 | 1996-11-07 | 1997-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-08 | 2000-11-07 | 2001-05-09 | $7700.00 | Window Closed / Lapsed |