RU2795742C1 - Double waveguide t-junction folded in e-plane - Google Patents

Abstract

FIELD: microwave technology.

SUBSTANCE: double waveguide T-junction folded in the E-plane contains rectangular waveguides forming the H- and E-arms, rectangular waveguides forming the side arms connected to the first wall of the rectangular waveguide forming the H-arm, as well as a waveguide transition attached to the second wide wall of the rectangular waveguide forming the H-arm. In the rectangular waveguide forming the E-arm, an additional corner bend is introduced in the H-plane with a rotation angle of 0°<α≤90°, attached to the first wide wall of a rectangular waveguide forming the H-arm, within which there is a rib formed by the inner walls of the corner bend in the H-plane, while the angle between the longitudinal axes of the rectangular waveguides forming the H- and E-arms is 90°-α.

EFFECT: constructive simplification of the devices in which the invention is implemented, while maintaining the electrical characteristics.

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Description

The invention relates to radio engineering, namely to the elements of the waveguide path, and can be used in waveguide, antenna and microwave measuring technology.

The closest to the claimed technical solution is a double T-shaped bridge, rolled up in the E-plane, containing rectangular waveguides forming the H- and E-arms, rectangular waveguides forming the side arms connected to the first wall of the rectangular waveguide forming the H-arm ( Handbook of radar / Ed. M. Skolnik, vol. 2 - M: Sov. radio, 1977, p. 24, Fig. 17c).

The disadvantage of the prototype is the orthogonal arrangement of H - and E-shoulders, leading to an increase in the size of the layout of the waveguide path of small devices, which include a double waveguide tee, rolled up in the E-plane.

The authors were faced with the task of creating a double waveguide tee, folded in the E-plane, devoid of this drawback.

The technical result of the proposed double waveguide tee, folded in the E-plane, is a structural simplification of the devices in which it is included, while maintaining its electrical characteristics, is achieved due to the fact that a corner bend is additionally introduced into the rectangular waveguide forming the E-arm in the H-plane with a rotation angle of 0°<α≤90°, attached to the first wide wall of the rectangular waveguide forming the H-arm, within which there is a rib formed by the inner walls of the corner bend in the H-plane, while the angle between the longitudinal axes rectangular waveguides forming the H- and E-arms is 90°-α.

The narrow wall of the rectangular waveguide forming the E-arm, which is one of the inner walls of the corner bend in the H-plane, may coincide with the first wide wall of the rectangular waveguide forming the H-arm.

The edges of the side arms, waveguide transition and corner bend can have a radial conjugation

The inventive double waveguide tee, folded in the E-plane, has a set of existing features that are not known from the prior art for products of this purpose, which allows us to conclude that the criterion of "novelty" for the invention is met.

The inventive double waveguide tee, folded in the E-plane, according to the applicant and the authors, meets the criterion of "inventive step", because for specialists, it does not explicitly follow from the prior art, i.e. not known from available sources of scientific, technical and patent information at the date of application.

The essence of the proposed solution is explained with the help of drawings, where:

- in Fig. 1 shows an example of the design of a double waveguide tee, rolled up in the E-plane, in which the angle of rotation α=90°;

- in Fig. 2 shows a side view of a double waveguide tee folded in the E-plane (the boundaries of the corner bend in the H-plane are shown by a conventionally dotted line);

A double waveguide tee, rolled up in the E-plane, consists of a rectangular waveguide forming the H-arm 1, to the first wide wall of which a corner bend in the H-plane 2 is attached with a rotation angle α=90° and a connected rectangular waveguide forming the E-arm 3, the narrow wall of which, which is one of the inner walls of the corner bend in the H-plane 2, coincides with the first wide wall of the rectangular waveguide forming the H-arm 1, while the angle between the longitudinal axes of the rectangular waveguides forming the H-arm 1 and E- arm 3 is equal to 0°. Rectangular waveguides forming side arms 4 and 5 are connected to the first wide wall of the rectangular waveguide forming the H-arm 1, and the waveguide transition 6 is attached to the second wide wall of the rectangular waveguide forming the H-arm 1.

The device works as follows.

The microwave signal received at the input of a rectangular waveguide forming the H-arm 1 passes through it and is divided between the side arms 4 and 5 into two antiphase signals of the same amplitude. The microwave signal received at the input of a rectangular waveguide forming the E-arm 3 passes through it and enters the corner bend in the H-plane 2 with a rotation angle α=90°, where it changes the direction of its propagation. Next, the microwave signal is divided between the side arms 4 and 5 into two in-phase signals of the same amplitude. Rectangular waveguides forming H-arm 1 and E-arm 3 are decoupled. The matching of the rectangular waveguides forming the H-arm 1 and E-arm 3 is ensured by choosing the optimal dimensions of the waveguide transition 6 and the corner bend in the H-plane 2.

In the manufacture of a double waveguide tee, rolled in the E-plane, for example, by milling, it is possible to simultaneously manufacture rectangular waveguides forming side arms 4 and 5, as well as a waveguide transition 6 and a corner bend in the H-plane 2, while in the manufacturing process there are radial conjugations of the edges of the side arms 4 and 5, the waveguide transition 6 and the corner bend in the H-plane 2.

To confirm the correctness of the chosen technical solution, the enterprise manufactured a number of samples of double waveguide tees, rolled up in the E-plane, in which at least 10% VSWR does not exceed 1.10 in the operating frequency band.

Based on the tests carried out, it can be concluded that a double waveguide tee, rolled up in the E-plane, is not inferior in its electrical characteristics to analogues, but at the same time has an advantage in design and technological performance, which confirms the absence of a lack of a prototype and the compliance of the proposed solution with the criterion "industrial applicability" for the invention.

Claims (3)

1. A double waveguide tee, rolled up in the E-plane, containing rectangular waveguides forming the H- and E-arms, rectangular waveguides forming the side arms connected to the first wall of the rectangular waveguide forming the H-arm, as well as a waveguide transition docked to the second wide wall of the rectangular waveguide forming the H-arm, characterized in that the rectangular waveguide forming the E-arm additionally has a corner bend in the H-plane with a rotation angle of 0°<α≤90°, attached to the first wide wall of the rectangular waveguide , forming the H-arm, within which there is a rib formed by the inner walls of the corner bend in the H-plane, while the angle between the longitudinal axes of the rectangular waveguides forming the H- and E-arms is 90°-α. 2. A double waveguide tee, rolled up in the E-plane, according to claim 1, characterized in that the narrow wall of the rectangular waveguide forming the E-arm, which is one of the inner walls of the corner bend in the H-plane, coincides with the first wide wall of the rectangular waveguide , which forms the H-arm. 3. Double waveguide tee, folded in the E-plane, according to claim 1, characterized in that the ribs of the side arms, waveguide transition and corner bend have a radial conjugation.

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