RU1793495C - Waveguide rotary joint - Google Patents

Abstract

The invention relates to microwave technology and can be used in rotating antenna devices. An object of the invention is to expand the operating frequency band and increase the level of transmitted power. The waveguide rotating joint contains two full-wave coaxial transitions 1 and 2 in the form of binary waveguide power dividers, the wide walls of the waveguide outputs of which are located in circles coinciding with the bases of the cylinders forming a coaxial line 15. The waveguide-coaxial transitions 1 and 2 are inverted one to the other by coaxial outputs 14, are arranged on one axis and rotatably mounted relative to one another. 3 ill. ; .

Description

The invention relates to microwave technology and can be used in rotatable antenna devices. .

Known waveguide rotating joints (ed. St. No. 724018, CL H 01 P 1/06, 1976) are mainly based on the use of two waveguide-coaxial junctions oriented towards each other, and the rotation is carried out along the coaxial with the wave main type - TEM. Significant disadvantages of such joints are insufficient broadband and limiting the level of transmitted power, which is due to the maximum permissible transverse dimensions of the coaxial. The small diameter of the center hole further limits the possibility of arranging a multi-channel rotating joint.

The purpose of the invention is to provide a waveguide rotating joint having increased broadband and operability at elevated power levels with a relatively large central opening.

The essence of the invention lies in the fact that the excitation of the coaxial wave TEM. type is implemented by a binary type waveguide power divider.

In FIG. 1 is a side view of the device; in FIG. 2,3- views of individual nodes from above.

The rotating joint consists of two identical bases 1 and 2, two intermediate sections 3 and 4 and a bearing 5.

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Each of the bases 1 and 2 is a four-channel power divider in which the input waveguide 6 is divided in the E-plane into two channels 7 and 8, oriented in a circle. These channels may contain smooth or step transitions 9 to a greater height of the waveguide. At a distance of one quarter of the circle from the entrance 6, both output channels are turned towards each other and are again divided in the same way into two channels 10 and 11, which go to a circle coinciding with the average diameter of the coaxial line. In this case, one of the channels 10 changes 5 directions by 180 °. This is necessary so that the output channels of the divider 12 and

13 were in phase. Each of the output channels ends with a 90 ° bend in the H plane. The resulting system of waveguide channels 12 and 13, the wide walls of which coincide with the circles of the coaxial line 15, through matching channels

14 quarter-wavelength excites the main wave in the coaxial line 15

5 TEM type. The width of the waveguide channels 14 is selected from transition matching conditions.

To ensure contactless transfer of microwave energy from the bottom of the device to the upper, movable relative to the bottom, half-wave chokes 16 and 17 are used, which are structurally made in the intermediate sections 3 and 4. Bearing 5 mechanically connects both halves of the joint into a single device and provides free rotation.

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Claims (2)

1. A waveguide rotating joint containing two waveguide-coaxial junctions facing each other with coaxial outputs located on one axis and mounted to rotate one relative to the other, characterized in that, in order to expand the working frequency band and increase the level of passage cabbage power, waveguide-coaxial transitions are made in the form of binary waveguide power dividers, the wide walls of the waveguide outputs of which are located on circles coinciding with the bases of the cylinders forming a coaxial line. 2. The articulation according to claim 1. differs in that, in order to reduce the dimensions, the binary waveguide power dividers are made E-planar.