摘要:
An antenna feed device (100) having a first waveguide (102) and a second waveguide (104) separated from the first waveguide (102), each of which is assigned to feed one polarization of a dedicated antenna and each of said waveguides exhibit an overall L-shape form where at least one section of the L-shape of each waveguide is in parallel to the other, both having respectively a first (106) and a second (108) antenna end ending in one plane for connection to an ortho-mode transducer associated with the antenna, while the other sections of the two L-shape waveguides extend in opposite directions, having respectively a first (110) and a second (112) radio end, each of which ends with a single waveguide port for connection to a radio equipment and the waveguides arrangement yields an overall compact T-shape interconnection of the antenna and the radios dedicated to the orthogonal polarizations.
摘要:
A junction for connecting two waveguides having substantially a 90-degree angular offset between longitudinal symmetry axes of their cross-sections. The junction has a first interface and a second interface for connecting the waveguides, and at least a first transformer section and a second transformer section, both having cross-sections of substantially rectangular shape, and both having the 90-degree angular offset between longitudinal symmetry axes of their cross-sections. The first and second transformer sections are connected such that a T-shape connection is formed and the first transformer section has a first protruded ridge on its broad wall and the second transformer section has a second protruded ridge on its broad wall. The broad wall with the second ridge is connected to the top narrow wall of the first transformer section and the ridges are located such that they overlap.
摘要:
An ortho-mode transducer (100) comprising a first part (102) with a first port (106) for connecting a first rectangular waveguide (112) and a second port (108) for connecting a second rectangular waveguide (114). The signals in the two waveguides have orthogonal polarizations. The transducer also comprises a second part (104) with a third port (110)for connecting a common circular waveguide (116) in which the two orthogonal signals can be propagated. Symmetry axes of cross sections of the first and the second waveguides have orthogonal orientation. The first rectangular port (106) has its broad walls perpendicular to the circumference of the common circular waveguide (116) and the second rectangular port (108) has its broad walls alongside the circumference of the common circular waveguide. The first and second ports are connected to the third port in opposite positions via 90-degree bends (118, 120). In a coupling region a separating plate extends from a wall closing the common circular waveguide, wherein the separating plate is oriented perpendicular to the longitudinal axes of parts of the rectangular ports coupled to the common circular waveguide.
摘要:
A parabolic reflector for an antenna has a plurality of concentric annular sections arranged in series from a first annular section nearest a central axis of the reflector to a last annular section defining an outer perimeter of the reflector. Each section has a parabolic reflecting surface between inner and outer perimeters. The sections are configured such that the focal point associated with at least the last section lies inside an internal volume of the reflector and are arranged with respect to each other along the central axis, such that an overall depth of the reflector is substantially minimized. The inner perimeters of all the sections are preferably arranged to lie substantially on a plane which is perpendicular to the central axis. The outer perimeter of each section except the last section is preferably connected with the inner perimeter of the succeeding section by means of an annular strip. The strips may either each have an angle of inclination to the reflector central axis of between 0° and 3° or they may lie on respective cones running from the respective inner perimeters of the respective sections to which they are joined, to the furthest located focal point or ring.
摘要:
In a device for directional transmission and/or receiving of electromagnetic waves, including at least one antenna element and a dielectric lens, there is arranged between them a prefocusing dielectric body for avoiding overradiation of the lens. In order to simplify adjustment, the lens has an extended surface, is preferably pot-shaped, and forms, in conjunction with a baseplate, a hermetically sealed housing for unencapsulated ICs.