Patent US4990923A successfully refreshed from Google Patents.
US4990923A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Test pylon having low radar cross section
Assignee: Boeing Co
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Filing: 1989-06-29
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Granted: 1991-02-05
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Expires: 2009-06-29
Abstract
Abstract A pylon for supporting a test target in an anechoic chamber during a radar cross section measurement. The pylon includes an elongated support extending upwardly from a base to a tip on which the test target is mounted. The support inclines and curves in the direction of an interrogating radar signal, and its tip is smoothly faired to the test target. The tip is formed from a resilient, radar-absorbing material, and it is bent by internal actuating means to vary the angular orientation of the test target.
Inventors
- 👤 Thomas P. Delfeld
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 17:43
CPC Classifications
G; G01; G01S; G01S7/00; G01S7/02; G01S7/40; G01S7/4052; G01S7/4082; G01S7/4086
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
87 words
A pylon for supporting a test target during a radar cross section measurement, said pylon comprising an elongated support extending upwardly from a base to a tip on which said test target is mounted, said support being inclined in a first direction toward an interrogating radar signal, substantially the entire length of said support, including said tip curving smoothly in said first direction with said support being smoothly faired to said test target at said tip so that said pylon has a relatively low radar cross section.
Claim 2
Dependent Claim
87 words
A pylon for supporting a test target during a radar cross section measurement, said pylon comprising an elongated support extending upwardly from a base to a tip on which said test target is mounted, said support being inclined in a first direction toward an interrogating radar signal, substantially the entire length of said support, including said tip curving smoothly in said first direction with said support being smoothly faired to said test target at said tip so that said pylon has a relatively low radar cross section.
Claim 3
Dependent Claim
105 words
A pylon form supporting a test target during a radar cross section measurement, said pylon comprising an elongated support extending upwardly from a base to a flexible tip on which said test target is mounted, said support being inclined in a first direction toward an interrogating radar signal, the tip of said support curving smoothly in said first direction with said support being smoothly faired to said test target at said tip so that said pylon has a relatively low radar cross section, said pylon further including acutator means for bending the tip of said support to vary the angular orientation of said test target.
Claim 4
Dependent Claim
105 words
A pylon form supporting a test target during a radar cross section measurement, said pylon comprising an elongated support extending upwardly from a base to a flexible tip on which said test target is mounted, said support being inclined in a first direction toward an interrogating radar signal, the tip of said support curving smoothly in said first direction with said support being smoothly faired to said test target at said tip so that said pylon has a relatively low radar cross section, said pylon further including acutator means for bending the tip of said support to vary the angular orientation of said test target.
Claim 5
Dependent Claim
21 words
The pylon of claim 2 wherin said actuator means varies the angular orientation of said test target about its pitch axis.
Claim 6
Dependent Claim
21 words
The pylon of claim 2 wherein said actuator means varies the angular orientation of said test target about its yaw axis.
Claim 7
Dependent Claim
15 words
The pylon of claim 2 wherein said tip is formed of a flexible, radar-absorbing material.
Claim 8
Dependent Claim
70 words
A pylon for supporting a test target during a radar cross section measurement, said pylon comprising an elongated support extending upwardly from a base to a flexible tip on which said test target is mounted, said support being inclined in a first direction toward an interrogation radar signal, said pylon further including actuator means for bending the tip of said support to vary the angular orientation of said test target.
Claim 9
Dependent Claim
70 words
A pylon for supporting a test target during a radar cross section measurement, said pylon comprising an elongated support extending upwardly from a base to a flexible tip on which said test target is mounted, said support being inclined in a first direction toward an interrogation radar signal, said pylon further including actuator means for bending the tip of said support to vary the angular orientation of said test target.
Claim 10
Dependent Claim
21 words
The pylon of claim 6 wherein said actuator means varies the angular orientation of said test target about its pitch axis.
Claim 11
Dependent Claim
21 words
The pylon of claim 6 wherein said actuator means varies the angular orientation of said test target about its yaw axis.
Claim 12
Dependent Claim
15 words
The pylon of claim 6 wherein said tip is formed of a flexible, radar-absorbing material.
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) | 1994-02-04 | 1994-08-06 | 1995-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-02-04 | 1998-08-06 | 1999-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-02-04 | 2002-08-06 | 2003-02-05 | $7700.00 | Window Closed / Lapsed |