JPS584325Y2 - Waveguide circulator with ferrimagnetic fixing mechanism - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a waveguide circulator that is provided with a ferrimagnetic material fixing mechanism for use inside the waveguide circulator used in microwave communication equipment and the like.

Conventionally, the method for positioning the ferrite in a waveguide-type circulator is as shown in Fig. 1, by pasting the upper and lower surfaces of the ferrite 2 to two dielectric bodies with adhesive (see Fig. 2), and attaching the tube wall 3 that will become the circulator. A jig was used to position it in the center, and it was fixed there by pressing it with adhesive.

Further, as shown in FIG. 3, insert the screw 6 shown in FIG. 4 into the tap 4 provided at the center of one of the tube walls 3 of the circulator, and press the dielectric 1 assembled in FIG. 2. It was fixed.

The structure shown in Figure 1 is used for split waveguides, and the structure shown in Figure 3 is used for integrated waveguides, depending on the manufacturing method of the waveguide. There is.

In these mounting methods, when the dielectric 1 is attached to the ferrite 2 with an adhesive, the dielectric 1 may be misaligned or the adhesive may protrude, which adversely affects the characteristics of the circulator.

Furthermore, a positioning jig is required when fixing these to the center of the tube wall 3 of the circulator, and an adhesive or the like is required for bonding to the tube wall, resulting in poor work efficiency.

An object of the present invention is to provide a waveguide circulator with a ferrite fixing mechanism that eliminates these drawbacks and allows alignment of the central axes without adhesive bonding.

1 The present invention will be explained in detail with reference to the drawings below.

FIG. 5 is a side sectional view of an embodiment of the present invention, and FIG. 6 is an assembled view of the ferrite and dielectric shown in FIG.

As shown in the figure, the dielectrics 1 and 1' are cap-shaped to sandwich the ferrite 2, and one of the dielectrics 1' is provided with a protrusion 10 at its center.

Since the ferrite 2 is sandwiched between the dielectrics 1 and 1', the ferrite 2 and the dielectrics 1 and 1' do not come apart.

As shown in FIG. 5, they are inserted into a recess 11 provided at the center of the circulator tube wall 3' with the dielectric protrusion 10 aligned, and are pressed and fixed against the circulator tube wall 3.

Therefore, there is no need to use an adhesive or a positioning jig, and since no adhesive is used, there is no effect on electrical retention.

FIG. 7 is a side sectional view of another embodiment of the present invention, FIG. 8 is an assembled view of the ferrite 2 and dielectrics 1 and 1', and FIG. 9 is a detail of the stepped screw 13 used in FIG. 7. It is a diagram.

The difference between this embodiment and FIG.
It has a structure in which it is fixed by aligning the stepped portion 13 of the stepped screw 4 and screwing it in.

As explained above, the present invention eliminates the use of positioning jigs and adhesives when fixing ferrite, and it can be easily fixed without worrying about misalignment between the ferrite and dielectric, resulting in good workability. Also, electrically stable characteristics can always be obtained.

[Brief explanation of drawings]

Figures 1 and 3 are side sectional views of the ferrite fixing structure of a conventional circulator, Figure 2 is an assembly diagram of the ferrite and dielectric used in Figure 1, and Figure 4 is a side view of the screw used in Figure 3. , FIGS. 5 and 7 are side sectional views of the first and second embodiments of the present invention, FIGS. 6 and 8 are assembly views of the ferrite and dielectric of FIGS. 5 and 7, FIG. 9 is a side view of the stepped screw used in FIG. 7. In the figure, 1, 1'... cap-shaped dielectric,
2... Ferrite, 3, 3'... Circulator tube wall, 4... Circulator center tap, 6... Screw, 10...・Protrusion, 11... Recessed part, 12... Dielectric hole, 13... Stepped part, 14... Stepped part .

Claims (2)

[Scope of utility model registration request] (1) A ferrimagnetic plate whose screen surface is held by a dielectric plate is inserted between the tube walls of the waveguide branch section where at least three rectangular waveguides serving as input and output ends are branched. In the waveguide type circulator, each of the dielectric plates is formed to cover a part of the side surface perpendicular to the ferrimagnetic plate surface, and the dielectric plate is formed to cover the tube wall and the dielectric plate surface facing the tube wall. A ferrimagnetic body fixing mechanism characterized in that each of the ferrimagnetic substances is provided with a concave portion or a convex portion facing the concave portion, and the ferrimagnetic substance is positioned on the tube wall by fitting these concave portions and convex portions. Waveguide type circulator. (2) The utility model registration according to claim (1), wherein the convex portion of the tube wall is formed by cutting the tip of a screw that is attached to the tube wall and fixes the dielectric plate. Waveguide type circulator with ferrimagnetic material fixing mechanism.