Patent US3587102A successfully refreshed from Google Patents.
US3587102A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Helicopter skid antenna
Assignee: United States Department of the Army
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Filing: 1969-12-31
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Granted: 1971-06-22
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Expires: 1989-12-31
Abstract
Abstract The struts which are disposed perpendicular to the roll axis of a helicopter for supporting the landing skids thereof are insulated from the helicopter fuselage. One of the struts has an antenna feed at its center, whereby the entire landing gear assembly functions as a folded dipole antenna or a loop antenna, depending on the operating frequency.
Inventors
- 👤 Watson P Czerwinski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:19
CPC Classifications
H; H01; H01Q; H01Q1/00; H01Q1/27; H01Q1/28
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
86 words
A combined landing gear and antenna for a helicopter, comprising; a plurality of struts attached to the underside of said helicopter parallel to each other and perpendicular to the roll axis of said helicopter, said struts being insulated from the body of said helicopter, a pair of skids attached to the ends of said struts, and antenna feed means at the center of one of said struts, whereby said struts form a folded dipole with capacitive loading or said entire landing gear forms a loop antenna.
Claim 2
Dependent Claim
86 words
A combined landing gear and antenna for a helicopter, comprising; a plurality of struts attached to the underside of said helicopter parallel to each other and perpendicular to the roll axis of said helicopter, said struts being insulated from the body of said helicopter, a pair of skids attached to the ends of said struts, and antenna feed means at the center of one of said struts, whereby said struts form a folded dipole with capacitive loading or said entire landing gear forms a loop antenna.
Claim 3
Dependent Claim
28 words
The apparatus of claim 1 wherein said struts are generally of arcuate shape and are attached to the underside of said helicopter by means of a dielectric block.
Claim 4
Dependent Claim
39 words
The apparatus of claim 1 wherein each of said struts comprises a single generally arcuate piece of tubular metal and said antenna is fed by means of a transformer in juxtaposition to the center of one of said struts.
Claim 5
Dependent Claim
63 words
The apparatus of claim 1 wherein each of said struts comprises separate parts, both being attached to a dielectric block mounted beneath the craft''s roll axis on the underside of the body thereof, the confronting parts of one of said struts forming a feed point for said antenna, and an antenna tuner connected between the confronting parts of the other of said struts.
Claim 6
Dependent Claim
38 words
The apparatus of claim 1 wherein said landing gear forms said folded dipole with capacitive loading in the very high frequency (VHF) region and wheRein said landing gear forms a loop antenna in the high frequency (HF) region.
Claim 7
Dependent Claim
45 words
A helicopter in which the landing gear thereof is of the skid type, means to insulate said landing gear from the fuselage of said helicopter, and means to couple a radio set to said landing gear, whereby said entire landing gear functions as an antenna.
Claim 8
Dependent Claim
45 words
A helicopter in which the landing gear thereof is of the skid type, means to insulate said landing gear from the fuselage of said helicopter, and means to couple a radio set to said landing gear, whereby said entire landing gear functions as an antenna.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-21 | 1974-12-21 | 1975-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-21 | 1978-12-21 | 1979-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-21 | 1982-12-21 | 1983-06-22 | $7700.00 | Window Closed / Lapsed |