US4069483A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coupled fed magnetic microstrip dipole antenna
Assignee: United States Department of the Navy
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Filing: 1976-11-10
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Granted: 1978-01-17
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Expires: 1996-11-10
Abstract
Abstract A coupled fed magnetic microstrip dipole antenna consisting of a thin eleically conducting, rectangular-shaped radiating element (resonator) and a nonradiating coupler formed on one surface of a dielectric substrate, the ground plane being on the opposite surface. The radiating element has one end shorted to the ground plane. There is only a single mode of oscillation. Oscillation takes place along the length of the radiating element, and the length determines the resonant frequency. The feed point is normally located at the end of the coupler; energy is in turn coupled to the radiating element. However, the feed point can be located along the uncoupled edge of the coupler. Input impedance matching is determined by a combination of the coupler length and the separation between the coupler and the radiating element, and also the feed location when fed along the uncoupled edge of the coupler.
Inventors
- 👤 Cyril M. Kaloi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:12
CPC Classifications
H; H01; H01Q; H01Q9/00; H01Q9/04; H01Q9/0407; H01Q9/045; H01Q9/0457; H01Q9/0421
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
187 words
A coupled fed magnetic microstrip dipole antenna having low physical profile and conformal arraying capability, comprising: a. a thin ground plane conductor; b. a thin rectangular microstrip radiating element and a separate thin rectangular-shaped microstrip nonradiating coupler alongside and spaced apart from said radiating element; c. said radiating element and non-radiating coupler being parallel to each other in the same plane and equally spaced from said ground plane; d. said radiating element and nonradiating coupler being electrically separated from said ground plane by a dielectric substrate; e. said radiating element being shorted to the ground plane at one end of the length thereof; f. said nonradiating coupler being fed from a coaxial-to-microstrip adapter, the center pin of said adapter extending through said ground plane and dielectric substrate to a feed point on said nonradiating coupler; g. the length of said radiating element determining the resonant frequency of said antenna; h. the antenna input impedance being variable to match most practical impedances by varying any of the coupler length and the distance between said radiating element and said nonradiating coupler without affecting the radiation pattern of the antenna.
Claim 2
Dependent Claim
187 words
A coupled fed magnetic microstrip dipole antenna having low physical profile and conformal arraying capability, comprising: a. a thin ground plane conductor; b. a thin rectangular microstrip radiating element and a separate thin rectangular-shaped microstrip nonradiating coupler alongside and spaced apart from said radiating element; c. said radiating element and non-radiating coupler being parallel to each other in the same plane and equally spaced from said ground plane; d. said radiating element and nonradiating coupler being electrically separated from said ground plane by a dielectric substrate; e. said radiating element being shorted to the ground plane at one end of the length thereof; f. said nonradiating coupler being fed from a coaxial-to-microstrip adapter, the center pin of said adapter extending through said ground plane and dielectric substrate to a feed point on said nonradiating coupler; g. the length of said radiating element determining the resonant frequency of said antenna; h. the antenna input impedance being variable to match most practical impedances by varying any of the coupler length and the distance between said radiating element and said nonradiating coupler without affecting the radiation pattern of the antenna.
Claim 3
Dependent Claim
38 words
An antenna as in claim 1 wherein the ground plane conductor extends at least one wavelength in each direction beyond the edges of the said radiating antenna element and said non-radiating coupler to minimize any possible backlobe radiation.
Claim 4
Dependent Claim
25 words
An antenna as in claim 1 wherein the feed point of said nonradiating coupler is at one end of the centerline along the length thereof.
Claim 5
Dependent Claim
24 words
An antenna as in claim 1 wherein a plurality of said couplers and radiating element are arrayed on one surface of said dielectric substrate.
Claim 6
Dependent Claim
17 words
An antenna as in claim 1 wherein the length of said radiating element is approximately one-fourth wavelength.
Claim 7
Dependent Claim
32 words
An antenna as in claim 1 wherein the feed point of said nonradiating coupler is along the uncoupled edge of the coupler, which is the edge farthest away from said radiating element.
Claim 8
Dependent Claim
23 words
An antenna as in claim 1 wherein said thin rectangular radiating element and coupler are formed on one surface of said dielectric substrate.
Claim 9
Dependent Claim
28 words
An antenna as in claim 1 wherein the antenna electrical characteristics are varied by varying the position of said nonradiating coupler alongside the length of said radiating element.
Claim 10
Dependent Claim
25 words
An antenna as in claim 1 wherein said radiating element is shorted to the ground plane by means of any of rivets and plated-through holes.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-01-16 | 1981-07-18 | 1982-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-16 | 1985-07-18 | 1986-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-16 | 1989-07-18 | 1990-01-17 | $7700.00 | Window Closed / Lapsed |