| 摘要 |
<p>1. Plane antenna allowing a mechanical scan and comprising an emission source (1) adapted to transmit a divergent beam (10) onto a collimating device (2), which transmits a collimated beam (11) having a predetermined linear direction of polarization (E), to a transmission network (8), which is constituted of dispersive linear networks (80), whose direction of radiation depends upon the transmission frequency, the antenna further comprising : - two plane and parallel guide means (3, 4) disposed on either side of the collimated beam (11) parallel to the direction of the linear polarization (E) of the beam and delimiting a guide medium (5) for the beam ; and - an adjustable reflexion device (6) disposed between the two plane guide means (3 and 4), the reflexion device being a plane mirror (6), whose reflexion plane (7) is perpendicular to the planes of the guide means (3, 4) ; characterized in that the height (h) of the mirror is inferior to the distance (d) which separates the two guide plates (3, 4), such that no friction occurs between the mirror (6) and the guide plates (3, 4) ; and in that transition means (14, Fig. 7) are provided and placed between the mirror (6) and the transmission network (8) and comprise microwave guides (14) of equal electric length, adapted to ensure the phases between the mirror (6) and the transmission network (8) to remain unaltered.</p> |
