SU1721673A1 - Decoupler - Google Patents

Abstract

The invention can be used for isolating circuits in the microwave technique. The purpose of the invention is to impart circulatory properties. The device contains a myogose section of 1 groove waveguide. sections 4-6 of which form a three-bridge bridge by installing metal partitions 7 and 8 in section 4 and 6 and selecting transverse dimensions that ensure the distribution of section N and Hi2 waves in section 5 of a flute waveguide. The microwave signal entering arm 14 is divided at the input of section 4 into two equal, phase-shifted by 90 °, signals that are summed in phase at its output and excite in section 3 and 5 a wave of the type H11 of a flute waveguide, passing to the exit of the device. The microwave signal fed to section 2 enters shoulder 15, and shoulder 14 is diluted. , Microwave signal. filed in the shoulder 15, ultimately excites in the section 2 wave type Hi2. which, due to the chosen transverse dimensions, is leaky and absorbed by the absorbers 13, which ensures the achievement of the objective of the invention. 2 Il. (Ls

Description

I

-h

Yu

cЈ vl

Gj

The invention relates to microwave technology and is intended to be isolated in waveguide paths of the millimeter wavelength range.

The aim of the invention is to impart circulatory properties.

FIG. 1 shows the structural scheme of the decoupling device; in fig. 2 - the same, side view.

The developing device comprises a multisection segment 1 of a groove waveguide, the first 2 nd fifth sections, which are connected in series, the first and second metal partitions 7 and 8, which connect the middle of the grooves 9 of the second and fifth sections 4 and 6, the magnetized ferrite plate 10 and dielectric insert 11, which are installed in the second section 4, respectively, on its one side of one of the grooves 9 and in the slot 12 from the side of the magnetized ferrite plate 10, two microwave energy absorbers 13, which are installed in the slot 1 2 of the first section 2 at a distance of (3 ... 4) I from the grooves 9 and whose length is chosen within (8 ... 12) I, while the cross-sectional dimensions of the third section 3 are made with a smooth change, the first section 2 is satisfied lt-conditions

bi

C1

Od + lb2 ai 3-

where I am the length of the working wave,

ai, bi and ci are the widths of the groove waveguide, the grooves 9 and the slit 12 of the first section 2, respectively,

and the second, fourth and fifth sections 4, 5 and 6 are chosen from the conditions

B2

, + l2a2

L2b2

B a2V1 + bb22

where az, 02 and C2 are the widths of the groove waveguide, chute 9 and slit 12, respectively, of the second, fourth and fifth sections 4, 5 and 6, which form a three-limb bridge with shoulders 14 and 15 external to the device.

The developing device operates as follows.

When microwave signal is applied to arm 14, the field of the main type of a quasi-Nu rectangular waveguide is excited in it, which in the fourth section 5 excites two types of waves, the Нц and Hi2 waveguides. These waves, in turn, excite at the entrance of the second section A two independent waves due to the first metal partition 7, which

shifted in phase by 90 °. A wave passing a magnetized ferrite plate 10 and a dielectric insert 11 acquires an additional phase shift of 90

and at the output of the second section 4, an in-phase wave is added which passes the second section 4 without an additional phase shift. The total wave excites in the third section 3 a wave of the main type Nz groove

waveguide. As a result, a low loss microwave signal is transmitted to the first section 2, i.e. to the device output.

When applying a microwave signal in the first section 2 in it, and then in the third section 3

an Nc wave is excited. The first metal partition of the second section 4 divides this wave in phase into two independent and equal in amplitude waves, one of which, after passing through the magnetized ferrite plate 10 and the dielectric insert 11, acquires an additional phase shift of 270 °. This ensures, after the passage of the three-decimal bridge, the excitation of a wave in the arm 15 and the absence

signal (opening) in shoulder 14, i.e. achievement of circulatory properties.

When a microwave signal is applied to arm 15, antiphase waves appear at the output of the second section 4, which lead to excitation in the third and first sections 3 and 2 of the Hi2 type wave groove waveguide. The cross section of the first section 2 is selected so that this wave becomes leaky and is absorbed by the absorbers 13. As a result, arm 15

turns out to be unwound.

Claims (1)

DETAILED DESCRIPTION OF THE INVENTION A developing device comprising a multisectional section of a flute waveguide, in the first section of which opposite edges of the slit at a distance (3 ... 4) I have microwave energy absorbers with a length of (8 ... 12) from the gutters. I, and its lateral dimensions are chosen from the conditions D1 J , 5 + bbT2 V 3 where I am the length of the working wave, ai, from and C2 are the widths of the groove waveguide, the groove and the slot, respectively the first metal partition installed between the middle of the grooves of the second section, the dielectric liner and the magnetized ferrite plate which are respectively installed in the gap and On one of the side walls of one of the grooves of the second section, characterized in that, in order to impart circulatory properties, a third, fourth and fifth sections are inserted with a second metal partition connecting the middle of the grooves, the cross-sectional dimensions of the second fourth and the fifth sections, which are connected in cascade, are chosen the same from the conditions A 2A AND SHGGSHG A 2B 2aE “Vt. + bja 0 where 32, Ь2 and С2 widths of the groove waveguide, the groove and the slit, respectively, the third section is included between the first and second sections and its cross-sectional dimensions are smoothly modified, the dielectric insert is located with respect to the first metal partition on the magnetized ferrite plate The second, fourth, and fifth sections form a three-bridge bridge. Fig2