RU2557474C1 - H01 wave exciter - Google Patents

Abstract

FIELD: radio engineering, communication.

SUBSTANCE: H01 wave exciter consists of an E-plane T-branch 1, the lateral arms 2 of which are bent in the E-plane on a circle, the centre of which coincides with the axis of a section of a circular waveguide 3. Each of the lateral arms 2 of the E-plane T-branch 1 is connected to the section of the circular waveguide 3 through rectangular waveguides 4, arranged with spacing λv. One end of the section of the section of the circular waveguide 3 is fitted with a loudspeaker 5. A mode filter 6 is mounted in the section of the section of the circular waveguide 3. The dimensions of the narrow walls of the rectangular waveguide 4 are selected based on a condition of equal-amplitude excitation of feed elements of the section of the section of the circular waveguide 3. For said design of the H01 wave exciter: b1 = 1.2b, b2 = b, where b is the size of the narrow wall of the lateral arm 2 of the E-plane T-branch 1.

EFFECT: structural simplification of the exciter with improvement of technical characteristics thereof.

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Description

The invention relates to the field of radio engineering, namely to waveguide and antenna technology, and can be used as a device in long trunk waveguide communication lines.

Known pathogen wave H01 in a circular waveguide. The design of this pathogen is based on the principle of smooth deformation of the cross-sectional shape of the waveguide and the structure of the electric field (Microwave Devices: Textbook. Manual / Edited by D.M.Sazonov. - M.: Higher School, 1988., p. 61).

The disadvantages of this design are:

- the technological complexity of manufacturing smooth transitions;

- large longitudinal dimensions of the pathogen;

- large insertion loss.

Closest to the claimed technical solution is the pathogen wave H01 in a circular waveguide. The design of this pathogen is based on the principle of dividing the power by 4 and parallel supply of the circular waveguide through communication elements located on the lateral surface of the circular waveguide, the geometric axes of which are located in mutually perpendicular planes to obtain the necessary structure of the electric field (Application US No. 2010/0123529, H01P 1/16, publ. 2010).

The disadvantages of this design:

- large transverse dimensions of the pathogen;

- the need to align the electrical lengths of the channels of the power divider;

- a high relative power level of other types of waves other than wave H01 at the output of the pathogen due to the absence of mode filtering.

The authors were faced with the task of creating a pathogen of the H01 wave, devoid of the listed disadvantages.

The technical result of the claimed pathogen wave H01 is its structural simplification while improving its technical characteristics.

The problem is solved due to the fact that the waveguide power divider contains an E-plane T-shaped branch, the lateral shoulders of which are bent in an E-plane in a circle, the center of which coincides with the axis of a segment of a circular waveguide; at the same time, n rectangular waveguides spaced at a constant increment multiple of an integer number of wavelengths that are power elements of the round waveguide are docked to each of the lateral shoulders of the E-plane T-shaped branch from the side facing the circular waveguide segment.

Equal-amplitude excitation of the power elements of the circular waveguide segment is provided by changing the size of the narrow walls of rectangular waveguides.

The lateral shoulders of the E-plane T-shaped branch and the power elements of the segment of the circular waveguide, the most remote from the E-plane T-shaped branch, are made in the form of E-plane waveguide bends.

The lateral shoulders of the E-plane T-branch are connected to matched loads.

An H01 wave exciter is additionally equipped with a mode filter installed in a segment of a circular waveguide.

The causative agent of the wave H01 is made in the form of a set of plates with recesses and holes that, when combined with each other, form a system of waveguide elements.

The inventive pathogen wave H01 has a combination of essential features not known from the prior art for products of this purpose, which allows us to conclude that the criterion of "novelty" for the invention.

The inventive pathogen wave H01, according to the applicant and the authors, meets the criterion of "inventive step", because unknown from available sources of scientific, technical and patent information at the filing date.

The essence of the proposed solution is illustrated using the drawings,

Where:

- in FIG. 1 shows a diagram of the pathogen wave H01;

- in FIG. 2 - section of the pathogen wave H01 along the longitudinal axis.

As an example, the H01 wave exciter having four batteries is considered.

The causative agent of wave H01 consists of an E-plane T-branch 1, the side arms 2 of which are bent in an E-plane in a circle, the center of which coincides with the axis of a segment of the circular waveguide 3. Each of the side arms 2 of the E-plane T-branch 1 is connected with a segment of a circular waveguide 3 through rectangular waveguides 4 located at a step of λ _in . A short circuit 5 is installed at one end of the circular waveguide 3 segment. A mode filter 6 is installed in the circular waveguide 3 segment.

The dimensions of the narrow walls of the rectangular waveguides 4 are selected from the condition of equal-amplitude excitation of the power elements of the segment of the circular waveguide 3. For this implementation of the pathogen of the wave H01: b1 = 1.2b, b2 = b, where b is the size of the narrow wall of the lateral shoulder of 2 E-plane T-shaped branches one.

The device operates as follows.

The microwave signal is fed to the input of the E-plane T-shaped branching 1 and is divided into two opposite-phase signals of the same amplitude, which along the lateral shoulders 2 of the E-plane T-shaped branching 1 enter rectangular waveguides 4 and excite in the section of a circular waveguide for 3 s short circuit 5 wave H01. The position of the short circuit 5 is selected from the condition of the most optimal matching and excitation of the minimum number of spurious wave types. Then wave H01 propagates along a segment of a circular waveguide 3, in which a mode filter 6 is installed, filtering spurious wave types.

To reduce the dimensions of the device and increase the degree of integration, the waveguide elements are made in the form of a set of plates with recesses and holes that, when combined, form a system of waveguide elements. In addition, this set of plates can be placed in a segment of a circular waveguide 3, to the output of which an input waveguide of rectangular cross section with wave H10 is connected, which contributes to the maximum degree of integration.

To confirm the correctness of the chosen technical solution, prototypes of the H01 Ka wave exciter were made, for which the following technical characteristics were obtained:

- VSWR - not more than 1.2;

- loss - 0.1 dB.

Based on the tests performed, it can be concluded that the H01 wave exciter is not inferior to its analogs in electrical characteristics, but it has an advantage in design because it has a small length, provided that the cross section minimally extends beyond the diameter of the circular waveguide.

The company has developed a set of design documentation for the inventive pathogen wave H01. An experimental batch of products was produced that successfully passed the tests, which confirms the compliance of the proposed solution with the criterion of "industrial applicability" for the invention.

Claims (6)

1. The causative agent of the wave H01, containing a segment of a circular waveguide, on one side of which a short circuit is installed, as well as a waveguide power divider connected to a segment of a circular waveguide through batteries located on the side wall of a segment of a circular waveguide, characterized in that the waveguide power divider contains E -planar T-shaped branching, the lateral shoulders of which are curved in the E-plane in a circle, the center of which coincides with the axis of the segment of the circular waveguide; at the same time, n rectangular waveguides spaced at a constant increment multiple of an integer number of wavelengths that are power elements of the round waveguide are docked to each of the lateral shoulders of the E-plane T-shaped branch from the side facing the circular waveguide segment. 2. The causative agent of the wave H01 according to claim 1, characterized in that the equal-amplitude excitation of the power elements of the segment of the circular waveguide is provided by changing the size of the narrow walls of the rectangular waveguides. 3. The causative agent of the wave H01 according to claim 1, characterized in that the lateral shoulders of the E-plane T-shaped branching and the power elements of the circular waveguide segment, as far as possible from the E-plane T-shaped branching, are made in the form of E-plane waveguide bends. 4. The causative agent of the wave H01 according to claim 1, characterized in that the lateral shoulders of the E-plane T-shaped branching are connected with matched loads. 5. The causative agent of wave H01 according to claim 1, characterized in that it additionally includes a mode filter installed in a segment of a circular waveguide. 6. The causative agent of the wave H01 according to claim 1, characterized in that it is made in the form of a set of plates with recesses and holes that, when combined, form a system of waveguide elements.

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