IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0467845
(1990-01-22)
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발명자
/ 주소 |
- Miller, Jr., William McE.
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출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
13 인용 특허 :
3 |
초록
▼
An airborne surveillance platform utilizes a low aspect ratio delta-shaped aircraft having a radar-transparent hull. The antenna is located within, and stationary relative to, the hull. The antenna comprises planar or linear phased arrays arranged to scan in a continuous 360 degree pattern in all az
An airborne surveillance platform utilizes a low aspect ratio delta-shaped aircraft having a radar-transparent hull. The antenna is located within, and stationary relative to, the hull. The antenna comprises planar or linear phased arrays arranged to scan in a continuous 360 degree pattern in all azimuthal directions or in a continuous 180 degree pattern in all forward azimuthal directions. Planar phased arrays can be arranged to scan in a continuous pattern in the range from zenith to nadir or in portions of that range. In the case of forward direction scanning, the antenna arrays are located immediately inside the radar-transparent leading edges of the aircraft hull, thereby allowing a large cargo space within the hull between the antenna arrays. Access to the cargo space is provided through an opening in the trailing edge.
대표청구항
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1. An airborne surveillance platform comprising an aircraft hull having a delta-shaped platform with a narrow nose at one corner, first and second radar-transparent leading edges extending respectively from the nose to the opposite corners, and a trailing edge extending between said opposite corners
1. An airborne surveillance platform comprising an aircraft hull having a delta-shaped platform with a narrow nose at one corner, first and second radar-transparent leading edges extending respectively from the nose to the opposite corners, and a trailing edge extending between said opposite corners, the platform being substantially symmetrical about a plane of symmetry extending from said narrow nose to the midpoint of the trailing edge, ellipse-like cross-sections transverse to said plane through substantially all of the length of the hull, a maximum height dimension in said plane perpendicular to the chord in said plane at a location spaced from said trailing edge and from said nose, said ellipse-like cross-sections progressively decreasing in height, measured in said plane, throughout substantially the entire distance from the cross-section of maximum height toward said trailing edge, and a phased array antenna physically stationary relative to the hull, said antenna being arranged to scan horizontally, while the aircraft is in level flight, in all forward azimuthal directions within an arc of at least 180 degrees symmetrical about said plane of symmetry, and being fixed in a position substantially entirely within the interior of said hull so that substantially all radiant energy received by said antenna passes through said hull. 2. An airborne surveillance platform according to claim 1 in which said antenna comprises a first antenna element arranged to scan through said first leading edge, and a second antenna element arranged to scan through said second leading edge. 3. An airborne surveillance platform according to claim 2 in which said first antenna element is arranged lengthwise along the first leading edge on the inside thereof, and said second antenna element is arranged lengthwise along the second leading edge on the inside thereof. 4. An airborne surveillance platform according to claim 3 in which said first antenna element is situated sufficiently close to said first leading edge, and said second antenna element is situated sufficiently close to said second leading edge, to provide an interior cargo space located within the hull between said antenna elements, the hull having means providing an access opening near said trailing edge leading to said cargo space. 5. An airborne surveillance platform according to claim 3 in which said first antenna element is situated sufficiently close to said first leading edge, and said second antenna element is situated sufficiently close to said second leading edge, to provide an interior cargo space located within the hull between said antenna elements, the hull having means providing an access opening in the underside of the hull near said trailing edge, the access opening leading to said cargo space. 6. An airborne surveillance platform according to claim 3 in which said first and second antenna elements are linear phased arrays. 7. An airborne surveillance platform comprising an aircraft hull having a delta-shaped platform with a narrow nose at one corner, first and second radar-transparent leading edges extending respectively from the nose to the opposite corners, and a trailing edge extending between said opposite corners, the platform being substantially symmetrical about a plane of symmetry extending from said narrow nose to the midpoint of the trailing edge, ellipse-like cross-sections transverse to said plane through substantially all of the length of the hull, a maximum height dimension in said plane perpendicular to the chord in said plane at a location spaced from said trailing edge and from said nose, said ellipse-like cross-sections progressively decreasing in height, measured in said plane, throughout substantially the entire distance from the cross-section of maximum height toward said trailing edge, and a phased array antenna physically stationary relative to the hull and fixed in a position substantially entirely within the interior of said hull so that substantially all radiant energy received by said antenna passes through said hull, the antenna comprising a first linear phased array extending lengthwise along the inside of said first leading edge, and a second linear phased array extending lengthwise along the inside of said second leading edge.
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