US4644361A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combination microstrip and unipole antenna
Assignee: NEC Corp
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Filing: 1985-05-16
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Granted: 1987-02-17
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Expires: 2005-05-16
Abstract
Abstract Unidirectivity is achieved in an antenna including a microstrip portion and a unipole portion. The microstrip portion includes a ground plane conductor, a radiation plane conductor dielectrically spaced from the ground plane conductor, and a conductive member connecting the radiation plane conductor to the ground plane conductor., The unipole portion of the antenna comprises a unipole coupled to the radiation plane conductor. The radiation fields of the microstrip and unipole portions intensify each other in a single direction to achieve unidirectivity.
Inventors
- 👤 Yukio Yokoyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:10
CPC Classifications
H; H01; H01Q; H01Q9/00; H01Q9/04; H01Q9/30; H01Q9/32; H01Q9/38; H01Q1/00; H01Q1/27; H01Q1/32; H01Q1/325; H01Q1/3291; H01Q21/00; H01Q21/29; H01Q9/0407; H01Q9/0421
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
63 words
A combination microstrip-unipole antenna, comprising: (a) a microstrip antenna portion having a ground plane conductor, a radiation plane conductor dielectrically spaced from said ground plane conductor, and a conductive member connecting said radiation plane conductor to said ground plane conductor; (b) a unipole antenna portion coupled to said radiation plane conductor; and (c) means for connecting said combination antenna to an external circuit.
Claim 2
Dependent Claim
63 words
A combination microstrip-unipole antenna, comprising: (a) a microstrip antenna portion having a ground plane conductor, a radiation plane conductor dielectrically spaced from said ground plane conductor, and a conductive member connecting said radiation plane conductor to said ground plane conductor; (b) a unipole antenna portion coupled to said radiation plane conductor; and (c) means for connecting said combination antenna to an external circuit.
Claim 3
Dependent Claim
38 words
The combination antenna of claim 1, wherein said microstrip antenna portion is proportioned relative to said unipole antenna portion in such a way as to make approximately equal the radiated power from said microstrip and unipole antenna portions.
Claim 4
Dependent Claim
56 words
The combination antenna of claim 1, wherein said radiation plane conductor comprises four side edges generally defining a parallelogram, one of said edges contacting said conductive member, and a pair of opposing edges extending away from said conductive member, said single antenna position being positioned on said radiation plane conductor approximately midway between said opposing edges.
Claim 5
Dependent Claim
27 words
The combination antenna of claim 3, wherein said unipole antenna portion is coupled to the side of said radiation plane conductor facing away from said ground plane.
Claim 6
Dependent Claim
23 words
The combination antenna of claim 1, wherein the length of said unipole antenna is one-quarter of the frequency used by the combination antenna.
Claim 7
Dependent Claim
14 words
The combination antenna of claim 1, wherein said unipole antenna includes a bent unipole.
Claim 8
Dependent Claim
19 words
The combination antenna of claim 6, wherein said bent unipole is shaped in the form of the letter "L".
Claim 9
Dependent Claim
51 words
The combination antenna of claim 1, wherein said connecting means comprises a coaxial cable having an inner conductor and an outer conductor coaxially disposed around said inner conductor, and wherein said inner conductor is connected to said radiation plane conductor and said outer conductor is connected to said ground plane conductor.
Claim 10
Dependent Claim
14 words
The combination antenna of claim 1, wherein said conductive member comprises a plane conductor.
References Cited (Backward Citations)
US4443802A
Cited
US4587524A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-02-16 | 1990-08-18 | 1991-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-02-16 | 1994-08-18 | 1995-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-02-16 | 1998-08-18 | 1999-02-17 | $7700.00 | Window Closed / Lapsed |