Patent EP0482287A1 successfully refreshed from Google Patents.
US4134119A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antenna test shield
Assignee: UK Secretary of State for Defence
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Filing: 1977-06-23
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Granted: 1979-01-09
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Expires: 1997-06-23
Abstract
Abstract Apparatus for transferring electromagnetic signal energy between a signal circuit and an antenna that extends outwardly from a ground-plane surface includes a conductive shield that substantially encloses the antenna to confine the signal energy and to exclude all others. The shield has an open end to admit the antenna and suction-cup means disposed around the opening to mechanically connect the apparatus to the surface. A plug of dielectric material inside the open end includes a through passage and a recessed portion that conforms to a base of the antenna and operates to align the antenna within the shield. Conductive mesh lines the recessed portion and is electrically connected to the shield. Flexible contacts extend inwardly from the shield and engage mounting screws in the antenna base to electrically connect the shield to the surface. A conductive sleeve is mounted on the free end of the plug in coaxial, energy transfer relation with a longitudinal portion of the antenna and is electrically connected to a feed-through connector on the shield for connection to the signal circuit.
Inventors
- 👤 Oscar A. Sandoz
- 👤 Keith E. Hooey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:42
CPC Classifications
H; H01; H01Q; H01Q1/00; H01Q1/27; H01Q1/28; H01Q1/282
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
124 words
A shielded signal coupler for transferring electromagnetic energy between a signal circuit and an antenna upstanding from a ground-plane surface, the coupler comprising: Shield means having electrically conductive walls defining a closed chamber, including end portions defining a first opening adapted to admit the antenna; means for electrically connecting said walls adjacent the first opening with the surface; coupling means disposed within the chamber in isolated relation with the walls and antenna and in coaxial, energy transferring relation with the antenna, said energy being shielded by an outer conductor of the coupling means and confined between the outer conductor and the antenna; and signal conduction means for communicating the energy between said circuit and the coupling means through a second opening in said walls.
Claim 2
Dependent Claim
124 words
A shielded signal coupler for transferring electromagnetic energy between a signal circuit and an antenna upstanding from a ground-plane surface, the coupler comprising: Shield means having electrically conductive walls defining a closed chamber, including end portions defining a first opening adapted to admit the antenna; means for electrically connecting said walls adjacent the first opening with the surface; coupling means disposed within the chamber in isolated relation with the walls and antenna and in coaxial, energy transferring relation with the antenna, said energy being shielded by an outer conductor of the coupling means and confined between the outer conductor and the antenna; and signal conduction means for communicating the energy between said circuit and the coupling means through a second opening in said walls.
Claim 3
Dependent Claim
33 words
A coupler as claimed in claim 1, further comprising solid dielectric means to isolate the coupling means from the walls and to retain the coupling means in said coaxial relation with the antenna.
Claim 4
Dependent Claim
25 words
A coupler as claimed in claim 2, further comprising means for mechanically securing the shield means to the surface in enclosing relation with the antenna.
Claim 5
Dependent Claim
27 words
A coupler as claimed in claim 3, wherein the coupling means comprises an electrically conductive sleeve disposed in coaxial relation with a longitudinal portion of the antenna.
Claim 6
Dependent Claim
32 words
A coupler as claimed in claim 4, wherein the shield means comprises a first metallic cylinder having a partly closed end that includes the first opening, and a fully open opposite end.
Claim 7
Dependent Claim
39 words
A coupler as claimed in claim 5, wherein the shield means further comprises a second metallic cylinder having a fully open end adapted to be secured within the open end of the first cylinder, and a closed opposite end.
Claim 8
Dependent Claim
22 words
A coupler as claimed in claim 6, wherein said end portions comprise metallic mesh conforming to a dielectric base of the antenna.
Claim 9
Dependent Claim
49 words
A coupler as claimed in claim 7, wherein the solid dielectric means is disposed upon said mesh around the first opening and includes a recessed portion at the free end of the plug adapted to securably receive one end of the sleeve in coaxial relation with the first opening.
Claim 10
Dependent Claim
50 words
A coupler as claimed in claim 8, wherein the signal conduction means comprises a feed-through coaxial connector disposed within the second opening and secured to the side walls of the first cylinder, and a metallic conductor connecting a center conductor of the connector to a tab portion of the sleeve.
Claim 11
Dependent Claim
53 words
A coupler as claimed in claim 9, wherein the means for mechanically securing the shield means comprises at least one suction cup mounted on the outside surface of the first cylinder and adapted to be held in suction relationship with said surface to hold the coupler in energy transferring relation with the antenna.
Claim 12
Dependent Claim
17 words
A coupler as claimed in claim 5, further comprising metallic mesh closing off said open opposite end.
Claim 13
Dependent Claim
16 words
A coupler as claimed in claim 10 wherein the solid dielectric means comprises a styrofoam plug.
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) | 1982-01-08 | 1982-07-10 | 1983-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-08 | 1986-07-10 | 1987-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-08 | 1990-07-10 | 1991-01-09 | $7700.00 | Window Closed / Lapsed |