JPH0337321B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a waveguide connecting element (hereinafter referred to as a connecting element) in various radio wave devices such as radar and satellite communication equipment.

Prior Art Conventionally, flange connections have been used to connect waveguides. This involves cutting the two waveguides to be connected in a direction perpendicular to their length, bringing the cut surfaces into contact with each other, and then bolting the flanges welded to the ends of each waveguide. The waveguide is connected by tightening it with a nut.

Problems to be Solved by the Invention Non-ferrous conductive metals such as copper and aluminum are used as materials for the waveguide and the flange welded to the end of the waveguide. However, in order to weld these metal materials together, for example, argon welding is used for aluminum materials.
The cost of connecting waveguides using conventional methods is high because not only special welding equipment is required, but also skill is required for the welding work, and finishing processing after welding is also required. It was hot.

In addition, in order to prevent microwave reflection at the waveguide flange connection, it is necessary to make sure that the end faces of the waveguide are in complete contact and that there is no misalignment of the contact part. During removal and reassembly, it has required a great deal of skill and time to completely contact the end faces of the waveguides and prevent the contact portions from shifting.

In order to solve the above-mentioned problems, the present invention aims at providing a connecting element which makes it possible to connect a waveguide and a connecting element by simply inserting the waveguide to be connected.

Means for Solving the Problems The waveguide connecting element of the present invention is a waveguide connecting element in which the central part of the long side is divided into two so that the waveguide is clamped and fixed from the short side of the waveguide. A half-wavelength choke groove is formed near the end face of the waveguide connecting element, and a waveguide is inserted into the inner surface of the waveguide connecting element to enable connection between the two, and the waveguide connecting element is connected to the waveguide connecting element. A feature is that the inner bottom surface of the element is formed with a protrusion that fits into a groove formed in a direction perpendicular to the longitudinal direction of the waveguide.

Function To connect the waveguide to the connecting element, insert the waveguide into the lower divided body, and insert the groove formed perpendicularly to the longitudinal direction of the waveguide onto the inner bottom surface of the lower divided body. The upper divided body is connected to the lower divided body by fitting into the protrusion provided in the upper divided body, and the upper and lower short surfaces of the waveguide are clamped and fixed by the connecting elements.

Embodiment FIG. 1 shows an embodiment of the invention. The connection element 1 is made of a non-ferrous metal conductive metal such as aluminum die-casting,
The flange 2 of the lower divided body 1a is located at its longitudinal center.
It is divided into two such that a and the flange 2b of the upper divided body 1b are in contact with each other. Half-wavelength chiyoke grooves 5 are formed near the end faces of each of the lower divided body 1a and the upper divided body 1b. The waveguide 6 has an end face cut in a direction perpendicular to its length direction,
A groove 8 is provided near the end surface of the bottom surface 7 of the waveguide 6 in a direction perpendicular to the length direction of the waveguide 6.

Furthermore, a protrusion 4 that fits into the groove 8 is provided on the inner bottom surface 3 of the lower divided body 1a. To connect the waveguide 6 to the connecting element 1, the lower split body 1
The waveguide 6 is inserted into the inner surface of the upper divided body 1b, the groove 8 is fitted into the protrusion 4, and the flange 2 of the upper divided body 1b is inserted.
b in contact with the flange 2a of the lower divided body 1a,
Fix both flanges with bolts and nuts and attach the waveguide 6.
This is completed by clamping and fixing the upper and lower short surfaces of the connecting element 1.

To show the details of the half-wavelength chiyoke groove 5,
FIG. 2 shows a partial plan view of the lower divided body 1a with the waveguide 6 inserted into the lower divided body 1a, and a horizontal cross-sectional view of the vicinity of the end face of the waveguide 6.

A gap 9 starting from the end surface of the waveguide 6 is provided between the end face of the waveguide 6 and the vicinity of the end face, and the length d1 of this gap 9 is set equal to 1/4 wavelength. do. Further, a groove 10 continuous with the gap 9 is provided inside the lower division body 1a in a direction parallel to the waveguide 6 starting from the end point of the gap 9, and its length d2 is made equal to 1/4 wavelength. . The gap 9
The grooves 10 are similarly provided for the upper divided body 1b. The sum of the lengths d1 and d2 is equal to 1/2 wavelength, and therefore, the gap 9 and the groove 10 form a half-wavelength chain groove, so the connection point between the waveguide 6 and the connection element 1 ( No microwave reflection occurs at the connection point (hereinafter referred to as the connection point) 11.

Although the groove 10 is provided in parallel to the waveguide 6 in FIGS. 1 and 2, the groove 10 is
As long as the length of 0 is equal to 1/4 wavelength, it is clear from the effect of the half-wavelength chain yoke groove that there is no particular restriction on the direction.

FIG. 3 shows another embodiment of the present invention, in which the connecting element 1' is divided into a lower divided body 1a' and an upper divided body 1b' each having a U-shaped microwave passage on its inner surface. Other than that, this embodiment is the same as the embodiment shown in FIG.

Effects of the Invention When using the connecting element according to the present invention, after simply inserting the waveguide to be connected into the inner surface of the lower divided body of the connecting element, the upper divided body is attached to the lower divided body by bolts and nuts. Since all you have to do is connect the upper and lower end surfaces of the waveguide and secure them, the connection work is extremely simple compared to the conventional flange connection. Can be connected. Furthermore, there is no need for processing after connection, and no special welding equipment is required, so the cost of waveguide connection can be reduced. Furthermore, by fitting the groove provided on the bottom surface of the waveguide into the protrusion provided on the inner bottom surface of the lower divided body of the connection element, it is possible to prevent the waveguide from falling off from the connection element. can.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a connecting element and a partially cutaway perspective view of a waveguide according to an embodiment of the present invention, FIG. 2 is a plan view showing details of a half-wavelength chain yoke groove, and FIG. 3 is another embodiment of the present invention. FIG. 3 shows a perspective view of a connecting element and a partially cutaway perspective view of a waveguide according to the embodiment. 1, 1'... Connection element, 1a, 1a'... Lower divided body, 1b, 1b'... Upper divided body, 2a, 2b...
...Flange, 3...Inner bottom surface, 4...Protrusion, 5...
... Half-wavelength chain yoke groove, 6 ... Waveguide, 7 ... Bottom surface, 8, 10 ... Groove, 9 ... Gap, 11 ... Connection point.

Claims (1)

[Claims] 1. A waveguide connecting element in which the central part of the long side is divided into two so as to be clamped and fixed from the short side of the waveguide,
A half-wavelength channel groove is formed near the end face of the waveguide connecting element, and a waveguide is inserted into the inner surface of the waveguide connecting element to enable connection between the two, and 1. A waveguide connecting element, characterized in that the inner bottom surface of the tube connecting element is formed with a protrusion that fits into a groove formed in a direction perpendicular to the longitudinal direction of the waveguide.