Patent US3579244A successfully refreshed from Google Patents.
US3579244A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Collapsible antenna employing flexible tape radiators
Assignee: TDK Micronas GmbH
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Filing: 1968-08-27
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Granted: 1971-05-18
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Expires: 1988-08-27
Abstract
Abstract A plurality of radiating elements fabricated of flexible thin steel is secured to a telescoping mast. A ground plane is formed of a plurality of similar steel members which are mounted in a plane perpendicular to the mast. Within the mast are cables and auxiliary electrical equipment. The radiating elements, the ground plane elements, and the mast are completely collapsible into a compact package.
Inventors
- 👤 Richard C Dempsey
- 👤 Francis E Lind
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:47
CPC Classifications
H; H01; H01Q; H01Q1/00; H01Q1/08; H01Q1/085
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
107 words
A collapsible antenna for mounting on a mast comprising: a plurality of radiating elements formed of a flexible material secured to said mast, said radiating elements being secured at one end to said mast and extending downwardly and outwardly therefrom a predetermined angle when operational; and a plurality of elements forming a ground plane formed of flexible material and secured to said mast at one end, said ground plane elements extending outwardly in a plane perpendicular to said mast when said antenna is operational, said flexible material comprising conductive tape which collapses to a closed position from an open position when said antenna is not in use.
Claim 2
Dependent Claim
107 words
A collapsible antenna for mounting on a mast comprising: a plurality of radiating elements formed of a flexible material secured to said mast, said radiating elements being secured at one end to said mast and extending downwardly and outwardly therefrom a predetermined angle when operational; and a plurality of elements forming a ground plane formed of flexible material and secured to said mast at one end, said ground plane elements extending outwardly in a plane perpendicular to said mast when said antenna is operational, said flexible material comprising conductive tape which collapses to a closed position from an open position when said antenna is not in use.
Claim 3
Dependent Claim
25 words
A collapsible antenna in accordance with claim 1 wherein said predetermined angle is 45*, said antenna being designed to transmit and receive circularly polarized waves.
Claim 4
Dependent Claim
23 words
A collapsible antenna in accordance with claim 1 wherein said radiating elements and said ground plane elements are made of thin flexible steel.
Claim 5
Dependent Claim
24 words
A collapsible antenna in accordance with claim 1 wherein said radiating elements and said ground plane elements are of concave shape along their length.
Claim 6
Dependent Claim
37 words
A collapsible antenna in accordance with claim 1 wherein said radiating elements are secured to said mast in planes parallel to said mast when stored and said ground plane elements are secured in overlapping arrangement when stored.
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) | 1974-05-17 | 1974-11-16 | 1975-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-17 | 1978-11-16 | 1979-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-17 | 1982-11-16 | 1983-05-18 | $7700.00 | Window Closed / Lapsed |