EP0940880A1 - Radio relay apparatus - Google Patents

Abstract

A waveguide (8) is inserted axially into a part (7) which is directly or indirectly rigidly connected to the reflector (2) of a directional antenna. A flange (9) on the waveguide butts axially on one side against the part (7) via a spring element (10). The spring element may form an electrical connection.

Description

State of the art

The invention is based on the genus, as in independent claim 1 specified.

1.Guter elektrischer Kontakt an der Hohlleiterschnittstelle, um gute elektrische Anpassung, wenig Störstrahlung und wenig Gewinnverlust zu erreichen.

2.Guter mechanischer Kontakt, damit angreifende Lasten (Schnee/Eis, Wind, Gewicht...) sicher über die Halterung abgeleitet werden können.

Short-range directional radio devices are very often built in an integrated version (FIG. 1). The device is located directly on the antenna and is firmly connected to it.
Two things must be guaranteed:

1. Good electrical contact at the waveguide interface in order to achieve good electrical adaptation, little interference radiation and little loss of profit.

2. Good mechanical contact, so that attacking loads (snow / ice, wind, weight ...) can be safely discharged via the bracket.

Now that the two contact levels of device and antenna including pathogens are not identical lies here a mechanical overdetermination.

Usually this problem is mechanical Overdetermination solved in that the dimensions which the Determine electrical contact level, provide oversize to be sure to make electrical contact guarantee. It is accepted that either the mechanical connection was not clearly defined Has contact relationships or that there is a permanent deformation at the weakest point of the Contact level is coming.

Advantages of the invention

The subject of the application with the features of claim 1 has the following advantage:
Both good electrical and mechanical contact are made without the disadvantages mentioned above.

Advantageous further developments are in the dependent Claims specified, the characteristics of which, to the extent useful, can be combined with each other.

drawing

Figur 1:

ein Richtfunkgerät für Kurzstrecken,

Figur 2:

ein Ausschnitt aus Figur 1 als Explosionszeichnung,

Figur 3:

derselbe Ausschnitt im zusammengebauten Zustand.

An embodiment of the invention is shown in the drawing and explained in more detail below. The same reference numerals are used for substantially the same parts in several figures. Schematic is shown in

Figure 1:

a directional radio for short distances,

Figure 2:

2 shows a detail from FIG. 1 as an exploded drawing,

Figure 3:

the same cutout when assembled.

Description of the embodiment Structure of the preferred embodiment:

The directional radio shown in FIG. 1 has a housing 1 and an integrated directional antenna that consists of a Reflector 2 and an exciter 3, which is mechanical is rigidly and electrically connected to a waveguide 4, which, like the reflector 2, is rigid with the housing 1 connected is. There is one in front of the reflector 2 Cover 5 to protect against snow and ice.

As FIG. 2 shows, there is a rigid housing 1 Adapter plate 6, on which a part 7 during assembly is rigidly attached (see Figure 3), which in turn is rigidly connected to the reflector 2 of the directional antenna. The waveguide 4 rigidly arranged in the housing 1 becomes mechanically rigid and electrical with a waveguide 8 connected, which leads to pathogen 3. On the waveguide 8 a flange 9 is attached. Between this and the part 7 is a spring element 10 in the form of a metallic one Spring ring provided.

When assembling (compare Figure 3) now result two mechanical contact planes 11 and one electrical (and mechanical) contact level 12.

Function of the preferred embodiment:

When assembled, one rigidly takes care of the Exciter-connected, axially aligned guide surface 13 in the flange 9 for a defined axial guidance and Centering in a suitable recess of part 7. At the same time, the pretensioning of the spring element 10 good electrical contact between the flange 9 and the part 7 and thus achieved with the reflector 2, at good mechanical contact at the same time. The contact pressure this waveguide interface can via the spring force the spring ring 10 can be adjusted. The geometry of the involved parts is designed so that the exciter 3 in its target position in relation to the reflector (Parabolic mirror) is located during the travel f of the Spring ring has not yet reached its maximum. The Manufacturing tolerances that occur are now determined by a slight displacement of the exciter 3 relative to the reflector 2 balanced, the electrical contact through the Spring ring 10 is retained. The mechanical tolerances in total, the position tolerance of the pathogen, based on the parabolic mirror, do not exceed.

Claims (4)

Directional radio with housing (1) and integrated directional antenna, which consists of a reflector (2) and an exciter (3) which is mechanically rigid and electrically connected to a waveguide (8) which, like the reflector (2), is indirectly rigid with the housing (1) is connected,
characterized, that the waveguide (8) is guided axially in at least one part (7) which is directly or indirectly rigidly connected to the reflector (2), and that a flange (9) which is provided on the waveguide (8) is axially supported on one side via a spring element (10) against a part (7) which is directly or indirectly rigidly connected to the housing (1). Directional radio according to claim 1, characterized in that the spring element (10) establishes an electrical connection. Directional radio according to claim 2, characterized in that the spring element (10) is a spring ring. Directional radio according to one of the preceding claims, characterized in that the forces of the spring element (10) on the side of the flange facing the exciter (3) (9) are directed.

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