摘要:
A waveguide adapter is arranged between a rectangular waveguide with a single cross-section and an elliptical waveguide which allows for the propagation of a fundamental wave type and higher wave types. The adapter includes a longitudinal channel which allows for the propagation of higher types of waves at least on one part of the length thereof and consists of various stages with different cross-sections. The adapter also has waveguide gates which are used to couple higher waves of the elliptical waveguide. The stages of the waveguide adapter in which the higher wave types are propagated have an elliptical cross-section.
摘要:
An antenna system for small basic transmitter-receiver stations of a communications system for mobile radio operators, with at least one transmission channel and one reception channel which operate on separate frequencies, with at least two antennas which are embodied for redundant reception (reception diversity). Each antenna is used as a transmission antenna for at least one channel. The transmitting operation is carried out without redundancy so that each antenna is fed by a different transmission channel, and the reception diversity is realized so that at least one antenna is set to receive a channel which is associated with the transmission channel of another antenna. The antenna system can be employed in mobile radio networks, in particular the D- net and the E-net. Advantages of the antenna system are low cost, low transmission loss, and high channel flexibility, and above all, the prevention of system interferences as a result of intermodulation products.
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:
The present invention relates to a transition arrangement comprising two surface-mountable waveguide parts and a dielectric carrier material with a metallization and a ground plane provided on a respective first main side and second main side Surface-mountable waveguide parts comprise a first wall, a second wall, and a third wall, which second and third walls are arranged to contact a part of the metallization, all the walls together essentially forming a U-shape, the surface-mountable waveguide parts also comprising respective bend parts. The metallization on the first main side is removed such that a first aperture and a second aperture are formed, the apertures being enclosed by a frame of via holes electrically connecting the ground plane with the metallization, the bend parts being fitted such that the apertures permit passage of a microwave signal propagating via the bend parts. Then the dielectric carrier material itself acts as a waveguide transition between the first aperture and the second aperture.
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 polarization separating filter, which can be integrated into a planar hollow waveguide circuit, is comprised of a central hollow waveguide (1), in which two orthogonal, linearly polarized waves can be propagated, where one end of the central hollow waveguide (1) is closed by a short circuit wall (2) and in the vicinity of the short circuit wall (2), two waveguides (3, 4) are coupled to two opposing walls of the central hollow waveguide (1), in an at least approximately identical cross sectional plane extending perpendicular to the longitudinal axis of the hollow waveguide. The hollow waveguides (3, 4) coupled at the end of the central hollow waveguide (1) are rotated in relation to each other in terms of their cross sections so that the fields in them are oriented orthogonally to each other.
摘要:
A junction for orthogonally oriented waveguides including a transformation stage which has a first oblong opening for connecting a first waveguide which is designed to carry a first ground wave type, and a second oblong opening for connecting a second waveguide which is designed to carry a second ground wave type. The first oblong opening and the second oblong opening are oriented orthogonally with respect to each other. The transformation stage has an essentially right-angled geometry with a height, a width and a depth, where the height and the width are chosen such that both the first ground wave type and the second ground wave type are propagated in the transformation stage.
摘要:
A waveguide switch having a stator and an electrically conducting movable element, the stator having waveguide paths between waveguide terminal pairs, each path being switchable to conducting or nonconducting with the help of the movable element for high-frequency waves. To permit lower requirements regarding manufacturing tolerances, the movable element is designed as a septum in a gap in the stator and extends in the waveguide path, which is switched to nonconducting, in parallel to its E plane. This divides the waveguide path into two partial waveguides, which run in parallel with one another and, in comparison with the switched-to-conducting state of the waveguide path, have smaller cut-off wavelengths.
摘要:
The present invention relates to a transition arrangement comprising two surface-mountable waveguide parts and a dielectric carrier material with a metallization and a ground plane provided on a respective first main side and second main side Surface-mountable waveguide parts comprise a first wall, a second wall, and a third wall, which second and third walls are arranged to contact a part of the metallization, all the walls together essentially forming a U-shape, the surface-mountable waveguide parts also comprising respective bend parts. The metallization on the first main side is removed such that a first aperture and a second aperture are formed, the apertures being enclosed by a frame of via holes electrically connecting the ground plane with the metallization, the bend parts being fitted such that the apertures permit passage of a microwave signal propagating via the bend parts. Then the dielectric carrier material itself acts as a waveguide transition between the first aperture and the second aperture.