SU928427A2 - Broad-band tranformer - Google Patents

Description

(54) STANDBAND TRANSFORMER

I

The invention relates to radio engineering, in particular, to the design and manufacture of broadband high-frequency transformers.

According to the main author. St. No. 725095 is known for a broadband transformer with an integer number of transformation ratio, containing a conductor consisting of series-connected sections, the number of which is equal to twice the value of the transformation ratio, and combined into two multi-conductor lines, the first of which contains odd conductors, and the second even its parts, with the end of the conductor connected to the common bus, and in the first multi-wire line there is an additional conductor, the beginning of which is connected to the common bus. The known transformer has a simple structure and operates in a wide frequency band of 11.

The disadvantage of the known transformer is the inability to have galvanic isolation between the input and the output.

This isolation is implemented in it by installing additional isolating capacitors or an additional transformer. All this leads to a decrease in efficiency, complexity of the device and the narrowing of its operating range.

The aim of the invention is to increase the efficiency by providing galvanic isolation between the input and output of the device without complicating it and while maintaining the extended operating frequency band. That caAibiM expands the functionality of the transformer.

The goal is achieved by the fact that in a broadband transformer an additional conductor is introduced into the second multi-wire line, the beginning of which is connected to the end of the additional wire of the first multi-wire line.

The drawing shows the electrical circuit of the proposed device.

A broadband transformer contains a Yvodnik 1, the beginning of which (in the drawing, the beginning is marked by a dot) forms an input 3 of the transformer that is asymmetrical about the common spikes 2. Conductor 1 consists of 2N series-connected sections, combined into two multi-conductor lines 4 and 5. In the first line, there are odd numbered sections of conductor I in parallel: 1-1, 1-3, 1-5, ..., l- (2N -3), 1- (2N-1), and in the second line 5 - even parts of the conductor 1: 1-2, 1-4, 1-6, ..., l- (2N-2), 1-2N . In the first line 4 there is an additional conductor 6, the beginning of which is connected to the common bus 2, and its end is connected with the beginning of the added additional conductor 7 to the line 5, the end of which forms the output 8 of the transformer asymmetrical relative to the common bus 2.

The device works as follows.

Asymmetrical with respect to the common bus 2, the oscillation is fed to the input 8 and then propagates along the line formed by the conductors 7 and 1-2N, or rather the opposite surfaces of these conductors. Further, the oscillation propagates along the line from conductors 6 and 1-2 (2N-1), then along the line from conductors 1-2N and I- (2N-2), then along the line from conductors 1- (2N-1) and l - {2N-3) and so on until it reaches output terminal 3, where a transformed voltage from t-t is formed

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common busbar 2, N times the alternating voltage at terminal 8. The wave impedances of all sections of the line are chosen such as to ensure that the transformer matches the load. With this, as can be seen from the drawing, there is a galvanic isolation between clips 3 and 8, since each of them has its own way to a common SHIN6 2.

10 As a result, we obtain a matched transformer of simple design, providing complete coordination and galvanic isolation between the input and output.

Claims (1)

Invention Formula Broadband transformer auth. St. No. 725095, characterized in that, in order to increase the efficiency due to galvanic isolation between the input and the output, an additional conductor is introduced into the second multi-wire line, the beginning of which is connected to the end of the additional conductor of the first log-conductor line. Sources of information taken into account in the examination I. USSR author's certificate N 725095, cl. H 01 F 19/04, 10/30/78.