SU1583999A1 - Flexible waveguide - Google Patents

Abstract

The invention is intended for waveguide paths of the microwave and EHF bands. The goal is to provide bipolarization work on the EH 11 wave at small losses and to simplify the design. The flexible waveguide contains a round metal pipe (KMT) 1, having annular corrugations 2, the dimensions of which are chosen from the ratios R 0 / λ = 0.77-2.0

T / λ 0 = 0.22-0.51

A / λ 0 = (- 0.76 T / λ 0 + 0.55) + 0.77 (T / λ 0 + 0.21), where R 0 is the maximum radius of KMT 1

A - Corrugation depth 2

T - period of corrugation 2

λ - wavelength in free space

λ 0 - average wavelength in free space. With the indicated choice of dimensions, abnormally low insertion losses occur during double-polarization work. 2 Il.

Description

Phage. one

The invention relates to a technique of microwave frequencies and can be used in the waveguide paths of the centimeter and millimeter wavelengths.

The aim of the invention is to provide bipolarisation work on the ENP wave with small losses and to simplify the design.

FIG. 1 shows a flexible waveguide, longitudinal section; in fig. 2 - dependence of the insertion loss on the working type of the ENP wave on the size of a round metal pipe.

The flexible waveguide comprises a circular metal tube 1 having annular corrugations 2 and forming a side surface 3 of which is a smooth periodic function.

The dimensions of the round metal pipe 1 with an annular corrugation are chosen from the ratios

, 77., 2.0, (1)

, 22 ... 0.51 (2)

а / А о (-0.76 T / Ao + 0.55) $, 79 T / To + 0.21), (3) where RO is the maximum radius of the round metal pipe 1; and - the depth of the corrugation 2; T - period of the corrugation 2;

A is the wavelength in free space;

AO is the average wavelength in free space.

Flexible waveguide works as follows.

Due to the selected sizes Ro / A, the round metal tube 1 propagates the microwave signal on the EHC wave without significant multi-mode (number of types).

As can be seen from FIG. 2, at T / Ao 0.22 there is an abnormally low insertion loss mode, and at T / Ao 0.51 there is a lock mode for the EHC wave.

Low insertion loss is achieved.

also, when performing relation (3), simultaneously performing relations (2) and (3), the smallest value of insertion loss at the edges of the working range is ensured.

Ensuring the operation of a flexible waveguide on an ESC wave can be used for working on orthogonal polarizations, which makes it possible to increase the density of information flows. Work on the EHC wave also allows for simplification of the design of emitters,

Claims (1)

Claims of the invention A flexible waveguide comprising a circular metal pipe having annular corrugations and forming a lateral surface of which is a smooth periodic function, characterized in that, in order to reduce losses during an EHC working type, the dimensions of a metal pipe are chosen from the ratios Ro / r0.77 ... 2.0; T / Ao 0.22 ... 0.51; a / Ao (-0.76 T / Ao + 0, 55) ... (0.79 .21). where RO is the maximum radius of a round metal pipe; T - the period of the corrugation; a is the depth of the corrugation; And - wavelength in free space; AO is the average wavelength in free space.