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1. 发明授权

US4684952A Microstrip reflectarray for satellite communication and radar cross-section enhancement or reduction 失效
标题翻译：用于卫星通信和雷达横截面增强或减少的微带反射阵列
公开(公告)号：US4684952A
公开(公告)日：1987-08-04
申请号：US423307
申请日：1982-09-24
申请人： Robert E. Munson , Hussain A. Haddad , John W. Hanlen
发明人： Robert E. Munson , Hussain A. Haddad , John W. Hanlen
IPC分类号： H01Q3/00 , H01Q3/46 , H01Q21/06 , H01Q1/38
CPC分类号： H01Q21/065 , H01Q3/46
摘要： A passive array of resonantly-dimensioned microstrip antenna radiator patches are closely spaced (i.e., less than one-tenth wavelength) above a ground plane and individually associated with transmission line segments terminated so as to cause the overall array to receive an incident r.f. electromagnetic field, to convert the received field into r.f. electrical currents which flow along the transmission lines and are absorbed by the terminations or reflected therefrom. In the latter case, the reflected r.f. energy is re-transmitted in a predetermined direction as a re-directed r.f. electromagnetic field. The presently preferred embodiment is a relatively thin, flexible and thus conformable layered structure formed by selectively etching conductive material from one side of a metallically cladded dielectric sheet. For satellite communication, a flat reflectarray may be associated with a primary r.f. transmitter/receiver structure disposed at a focal area or spot of the reflectarray having an appropriately phased aperture (e.g., parabolic). For radar cross-section enhancement or reduction, the reflectarray aperture is phased so as to retro-reflect incident r.f. fields or so as to scatter, otherwise misdirect or absorb (e.g., by using lossy resistive transmission line terminations) the incident r.f. field.
摘要翻译：共振尺寸的微带天线辐射体贴片的无源阵列在接地平面之上紧密间隔（即，小于十分之一波长），并且单独地与终止的传输线段相关联，以使整个阵列接收入射的r.f。电磁场，将接收的场转换成r.f. 沿着传输线流动并被终端吸收或从其反射的电流。在后一种情况下，反射的r.f. 能量作为重定向的r.f以预定的方向重新传送。电磁场。目前优选的实施例是通过从金属包覆的电介质片的一侧选择性地蚀刻导电材料而形成的相对薄的，柔性的并且因此适形的分层结构。对于卫星通信，平坦的反射阵可能与主要的r.f相关。发射器/接收器结构设置在具有适当定相孔（例如，抛物面）的反射阵列的聚焦区域或光点处。对于雷达横截面增强或减小，反射阵列孔径被分阶段反射以反射入射r.f。场或散射，否则误导或吸收（例如，通过使用有损电阻式传输线终端）事件r.f. 领域。

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