US4748449A
Expired / Lapsed
US
⏱️ 0.0 years remaining
RF absorbing ablating apparatus
Assignee: General Dynamics Mission Systems Inc
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Filing: 1984-04-02
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Granted: 1988-05-31
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Expires: 2004-04-02
Abstract
Abstract A microwave absorbing ablating material is used as the ablative covering between the transmitting and receiving antennas while a standard ablating material, allowing the transmission of signals, is placed about the antennas. This allows signals to be transmitted from and received by the object covered by RF absorbing ablating material while preventing the transmission of signals transversely through the material. The RF absorbing, ablating material is made by combining an RF absorbing material with an ablating material in sufficient quantities to absorb and dissipate any signals that may be exposed to the ablative material.
Inventors
- 👤 James F. Landers, Jr.
- 👤 R. Gordon Graham
- 👤 Theodore Harp, III
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:25
CPC Classifications
H; H01; H01Q; H01Q1/00; H01Q1/52; H01Q1/521; H01Q1/525; H01Q17/00
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
71 words
An RF absorbing, ablating apparatus comprising: a body; a transmission device being attached to said body; a receiving device being attached to said body and spaced from said transmission device; an ablating material including ethylenetetrofluoroethylene covering said transmission and receiving devices; and an RF absorbing ablator covering said body between said ablating material covering said transmission and receiving devices, said absorbing ablator including ethylenetetrofluoroethylene having an RF absorbing material mixed therewith.
Claim 2
Dependent Claim
71 words
An RF absorbing, ablating apparatus comprising: a body; a transmission device being attached to said body; a receiving device being attached to said body and spaced from said transmission device; an ablating material including ethylenetetrofluoroethylene covering said transmission and receiving devices; and an RF absorbing ablator covering said body between said ablating material covering said transmission and receiving devices, said absorbing ablator including ethylenetetrofluoroethylene having an RF absorbing material mixed therewith.
Claim 3
Dependent Claim
19 words
The RF absorbing, ablating apparatus of claim 1 wherein said RF absorbing material is comprised of Carbonyl Iron Powder.
Claim 4
Independent Claim
80 words
A method of preventing RF signals from being transmitted through an ablating material from a transmission antenna to a receiving antenna located on the surface of an airborne vehicle which comprises the steps of: providing an RF absorbing material; combining said RF absorbing material with an ablating material including ethylenetetrofluoroethylene forming an RF absorbing, ablating material; placing said RF absorbing, ablating material between said transmission and receiving antenna; and placing ablating material including ethylenetetrofluoroethylene over said transmission and receiving antenna.
Claim 5
Independent Claim
80 words
A method of preventing RF signals from being transmitted through an ablating material from a transmission antenna to a receiving antenna located on the surface of an airborne vehicle which comprises the steps of: providing an RF absorbing material; combining said RF absorbing material with an ablating material including ethylenetetrofluoroethylene forming an RF absorbing, ablating material; placing said RF absorbing, ablating material between said transmission and receiving antenna; and placing ablating material including ethylenetetrofluoroethylene over said transmission and receiving antenna.
Claim 6
Dependent Claim
23 words
The method of claim 3 wherein said RF absorbing, ablating material is placed on a ground plane between said transmission and receiving antenna.
Claim 7
Dependent Claim
71 words
An RF absorbing, ablating apparatus comprising: a body; a transmission device being attached to said body; a receiving device being attached to said body and spaced from said transmission device; an ablating material covering said transmission and receiving devices, said ablating material being comprised of ethylenetetrofluoroethylene; and an RF absorbing ablator covering said body between said ablating material covering said transmission and receiving devices, said RF absorbing ablator comprising Carbonyl Iron.
Claim 8
Dependent Claim
71 words
An RF absorbing, ablating apparatus comprising: a body; a transmission device being attached to said body; a receiving device being attached to said body and spaced from said transmission device; an ablating material covering said transmission and receiving devices, said ablating material being comprised of ethylenetetrofluoroethylene; and an RF absorbing ablator covering said body between said ablating material covering said transmission and receiving devices, said RF absorbing ablator comprising Carbonyl Iron.
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) | 1991-05-31 | 1991-11-30 | 1992-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-05-31 | 1995-11-30 | 1996-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-05-31 | 1999-11-30 | 2000-05-31 | $7700.00 | Window Closed / Lapsed |