Shadow antenna
阅读：924发布：2023-02-14
专利汇可以提供Shadow antenna专利检索，专利查询，专利分析的服务。并且A method and antenna means is provided for establishing a precision elevation relationship to facilitate piloting an aircraft. Essentially, a radar antenna is positioned on the aircraft at a location such that a physical portion of the aircraft itself intercepts part of the radar beam when the beam is directed towards the ground or towards a runway to thereby cast a shadow of such portion. In this respect, the physical portion of the aircraft causing the shadow essentially constitutes part of the antenna itself. The resulting radar picture from the antenna on a screen in the pilot''s cockpit will display the shadow relative to the ground or runway and the relative relationship of the shadow to the ground or runway establishes an elevation relationship on the radar screen for the pilot.，下面是Shadow antenna专利的具体信息内容。
1. A method of establishing an elevation relationship to facilitate piloting an aircraft approaching a runway along a precision glide path without the necessity of any ground control approach systems comprising the steps of: a. positioning a radar antenna on the aircraft at a location such that a physical portion of the aircraft itself intercepts part of the radar beam when the beaM is directed towards the runway to thereby cast a shadow of said portion; b. displaying the resulting radar picture from the antenna on a screen in the pilot''s cockpit so that the pilot can visually observe the resulting elevation relationship of the shadow relative to the outline of the runway; and, c. maneuvering the aircraft to maintain the observed shadow in a known elevation relationship to the runway as the aircraft approaches the runway corresponding to that relationship which results when the aircraft is on said precision glide path, whereby a wholly self-contained system on the aircraft provides the resulting elevational relationship.
2. An aircraft radar antenna means for displaying an elevation relationship to the pilot of the aircraft without the necessity of any ground control approach systems comprising, in combination: a. a radar antenna for directing a radar beam from the aircraft towards the ground; b. means mounting the antenna on the exterior of the aircraft in a position such that a physical portion of the aircraft itself intercepts a part of the radar beam to thereby cast a shadow of the portion on the ground; and c. a radar display screen in the pilot''s cockpit for displaying the resulting radar picture from the antenna, the position of the shadow relative to the ground as displayed on the screen establishing said elevation relationship, whereby a wholly self-contained system on the aircraft establishes the resulting elevational relationship.
3. An aircraft radar antenna means for displaying an elevation relationship to the pilot of the aircraft comprising, in combination: a radar antenna for directing a radar beam from the aircraft towards the ground; means mounting the antenna on the exterior of the aircraft in a position such that a physical portion of the aircraft itself intercepts a part of the radar beam to thereby cast a shadow of the portion on the ground; a radar display screen in the pilot''s cockpit for displaying the resulting radar picture from the antenna, the position of the shadow relative to the ground as displayed on the screen establishing said elevation relationship; an additional radar antenna operating independently of said first mentioned antenna providing a perspective radar picture, said additional antenna radiating a scanning beam from the aircraft which is swept across the same general area of ground towards which the beam of said first mentioned antenna is directed, the additional antenna being mounted on the aircraft in a different position from the first mentioned antenna so that no substantial physical portion of the aircraft which might cast a shadow intercepts the scanning beam; first and second receivers for the first mentioned and additional antenna signals respectively; mixer means connected to receive and combine the output signals from the first and second receivers and pass the combined signals to said radar display screen; and control means for distinguishing the output signals on said screen from each other.
4. An antenna according to claim 3, in which said control means constitutes gain controls on each of said receivers so that the relative intensities of the output signals displayed on said screen can be controlled whereby the shadow displayed on the screen can be faded out or brought into prominence relative to the overall picture provided by the scanning beam of said additional antenna.
5. An antenna according to claim 3, in which the position of the shadow on said screen relative to the display of the runway threshold on the perspective radar provides an indication of the desired precision glide slope angle to thereby enable the pilot to maintain the aircraft on the correct glide slope.
6. An antenna according to claim 3, in which the shape of the shadow as displayed on the perspective radar screen indicates any error in the set-in altitude in the perspective radar.
7. An antenna according to claim 3, in which the relative size of the runway to the shadow as Observed on the perspective radar indicates the approach progress or range of the aircraft with respect to the runway.
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