SU1506487A1 - Symmetry transformer - Google Patents

Abstract

The invention relates to radio engineering. The purpose of the invention is to expand the range of operating frequencies. The balancing transformer contains windings 1 and 2, made of segments of coaxial cable with conductors, windings 3 - 6, common bus 8 and two dielectric plates. An electrical voltage applied from the source to input 7 passes through a length of winding 1 and is applied between the end and the beginning of a winding formed by the conductors of windings 1 and 2 symmetrical with respect to the common bus 8, which results in a magnetic flux with the main axis 12 EMF occurs in the windings 3 - 6. The EMF of the windings 3 and 4, adding to the voltage on the external conductors of the windings 1 and 2, form the output voltage at the output 9, symmetrical with respect to the common bus 8. It has a combined magnet between the windings 1 - 4 spot and electrical bond causes the frequency-dependent nature of the coefficients. transmission and input impedance of the transformer. The introduction of windings 5 and 6 creates an additional connection between windings 1-4. This allows the frequency transformers to be adjusted x-ki, which expands the range of its operating frequencies. 4 hp f-ly, 2 ill.

Description

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The invention relates to radio engineering, in particular to broadband radio frequency transformers, designed to match an asymmetrical relatively common bus source with a symmetrical load, for example, an antenna.

The purpose of the invention is to expand the range of operating frequencies.

FIG. 1 shows a symmetrical transformer, a view along the axis of the main magnetic flux; Fig. 2 is the same, the cross section and the winding connection circuit.

A symmetrical transformer contains the first 1 and second 2 windings, made of coaxial cable lengths, as well as the third 3, fourth 4, fifth 5 and sixth 6 windings, input 7, common bus 8 and output 9. Beginning of windings 1-6 indicated by dots. The position of the turns of the windings 1-6 is fixed using dielectric plates 10 and 11.

Balun transformer operates as follows.

The source electrical voltage applied to input 7 passes through the section of the coaxial cable of the first winding 1 and is applied between the end of the outer conductor of the coaxial cable cut of the first winding 1 and the beginning of the outer conductor of the coaxial cable cut of the second winding 2, i.e. between the end and the beginning of the symmetrical with respect to the common bus winding formed by these conductors. As a result, a magnetic flux is formed with the main axis 12, under the action of which EMF occurs in the windings 3-6., The EMF of the windings 3 and 4 are added to the voltage on the external conductors of the coaxial cable sections of the windings 1 and 2, respectively, and form the output voltage at the output 9, symmetrical with respect to common bus 8. The combined magnetic and electrical coupling between windings 1-4 determines the frequency-dependent nature of the transmission coefficient and input impedance of the balancing transformer. The introduction of additional windings 5 and 6 creates an additional connection between the windings, which makes it possible to adjust the frequency characteristics of the balancing transformer,

those. expands the range of operating frequencies.

With the proposed connection of the windings 1-6, the leads of the windings 3 and 4 connected to the output 9 are located on the inner turns, and the windings 5 and 6 connected to the common bus 8 are located on the outer turns of the respective flat spiral coils. In the case of connection of windings 1-6 for a balancing transformer, the following features are characteristic: high-impedance transformable resistances, the higher value of the transformation ratio and the transformation of low-impedance impedances.

Claims (5)

1. A balancing transformer containing first and second windings made of coaxial cable, as well as third and fourth windings, with the beginning of the central conductor of the coaxial cable of the first winding being the input of the balancing transformer, the end of the central conductor of the coaxial cable- 1 of the first winding is connected from the beginning of the central and external conductors of the coaxial cable of the second winding, the ends of which, as well as the beginning of the external conductor of the coaxial cable segment ate the first coil are connected to a common bus, a first terminal of the third and fourth windings second vgood are output balancing transformer, which is characterized by the fact that, in order to expand the range of operating unified heel and pole windings, the connection point of which is connected to the common bus, the second terminal of the third and first end of the fourth winding are connected to the end of the outer conductor of the coaxial cable of the first winding and the beginning of the outer conductor of the coaxial cable of the second winding, respectively and the second terminal of the sixth windings are connected to the middle of the third and fourth windings, respectively, while the segments of the coaxial cable and the conductors of the windings are made in the form of flat spiral coils waist coils whose planes five parallel, with a coil placed in the bones ki, but the second plane is a coil The type of winding is concentric inside the first winding, in the third plane the coil of the sixth winding is concentric inside the coil of the second winding, in the fourth plane - the coil of the fourth winding. 2. The transformer according to claim 1, which is based on the fact that the beginnings of the first, fourth and fifth windings are located on the outer layer, and the beginnings of the second, third and sixth windings are on the inner layer of the corresponding flat spiral coil. 3. The transformer according to claim 1, characterized in that the beginning of the first, fourth and sixth windings ten 15h laid on the outer layer, and the beginning of the second, third and fifth windings on the inner layer of the corresponding flat spiral coil. 4. A transformer according to claim 1, characterized in that the beginnings of the first, third and sixth windings are located on the outer layer, and the beginnings of the second, fourth and fifth windings are on the inner layer of the corresponding flat spiral coil. h 5. A transformer according to claim 1, in accordance with the fact that the beginning of the first, third and fifth windings of the wire placed on the outer layer, and the beginning of the second, fourth and sixth windings on the inner layer of the corresponding flat spiral coil. Symmetric% HecuMMemputfHud bok 1