SU373802A1 - DIRECTED TAILOR - Google Patents

Description

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The invention relates to microwave radio engineering and can be used in measuring and antenna technology, in waveguide switching devices and paths where it is necessary to provide microwave power branching, high directivity and its adjustment.

Directional couplings with adjustable coupling elements are known, which contain primary and secondary rectangular waveguides connected by two coupling elements and a phase shifter.

The disadvantage of such directional couplers is poor directionality, the presence of movable contact connections in the current-carrying conductors of communication elements, and the presence of gaps in the junction of the waveguides.

In order to increase the directivity and the possibility of its adjustment at any point of the working range of the couplers without rebuilding the communication elements in the proposed device, the primary waveguide is made in the form of a loop having a contact area along the wide walls, and a segment is placed on the adjacent narrow walls of the waveguides of this section secondary waveguide, with communication elements located on its wall, which is common with both segments of the primary waveguide.

The drawing shows the proposed directional coupler.

In the proposed coupler, the waveguide sections 1 and 2 are paired and with the anti-pole ends connected to each other by a phase shifter 3. On a number of lying side surfaces of the paired segments there is a side section of the waveguide 4 with a load 5 at the end, and in its common with the paired waveguides / and 2 The walls of the communication hole 6 spaced along the axis of the waveguide are cut.

When the microwave wave passes through the waveguide path consisting of waveguide sections / and 2 and phase shifter 3, a wave is excited in the secondary waveguide 4, the propagation direction of which and its amplitude depend on the ratio between the phases of the signals passing the distance between the coupling elements mainly and in the secondary waveguide paths. Change with phase shifter 3 phase

signal in one of these paths, you can adjust the directivity and transient attenuation of the coupler.

The connection of the secondary waveguide 4 with the waveguide sections 1 and 2 can be carried out both through the narrow and through the wide walls of the rectangular waveguide, and can also be made combined.

The shape of the communication holes can be chosen round, in the form of slits, for example, cross-shaped.

Load 5 can be connected to any of the ends of the waveguide sections 1, 2 and 4.

Subject invention

A directional coupler containing primary and secondary rectangular waveguides connected by two couplings, and

a phase shifter, characterized in that, in order to increase the directivity, the primary waveguide is made in the form of a loop having a contact area along the wide walls, and a section of the secondary waveguide is placed on the adjacent narrow walls of the waveguide, and communication elements are located on its wall, common with both segments of the primary waveguide.

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