SU546023A1

SU546023A1 - Broadband transformer

Info

Publication number: SU546023A1
Application number: SU2029293A
Authority: SU
Inventors: Евгений Францевич Войтон; Лев Зауменович Генфон
Original assignee: Предприятие П/Я А-7672
Priority date: 1974-06-03
Filing date: 1974-06-03
Publication date: 1977-02-05

Description

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Изобретение относитс к области радиотехники и может быть использовано в широкополосных транзисторных усилител х мощности ВЧ и ОВЧ диапазонов.This invention relates to the field of radio engineering and can be used in wideband transistor power amplifiers of the HF and VHF bands.

Известен широкополосный трансформатор, обмотки которого представл т собой отрезки в. ч. линий, намотанные на тороидальный ферритовый сердечник 1. В указанном устройстве дл получени эффекта преобразовани сопротивлений в. ч. линии, образуюи1.ие обмотки, соедин ют между собою последовательно и (или) параллельно и к образованному соединению подключают внешние подвод щие линии, согласованные по волновому сопротивлению с лини ми обмоток. Недостаток такого трансформатора заключаетс в использовании в нем в качестве в. ч. линий обмоток из скручеииых проводников. Это ие позвол ет использовать его дл преобразоваии низкоомных сопротивлений на больиюм уровне в. ч. мощности, а также в наличии соедииительиых проводников, служащих дл соединени между собой концов обмоток и обмоток к подвод щим лини м, которые, вл сь паразитными индуктивност ми, существенно снижают рабочую полосу частот трансформатора.A wideband transformer is known, whose windings are cuts. including lines wound on a toroidal ferrite core 1. In said device for obtaining the effect of converting resistance into. The lines forming the winding are connected to each other in series and (or) in parallel and external supply lines matched in impedance with the winding lines are connected to the formed connection. The disadvantage of such a transformer is its use as a c. including lines of windings from twisted conductors. This does not allow it to be used to transform low-impedance resistances at the pain level. of power, as well as in the presence of connecting conductors serving to interconnect the ends of the windings and the windings to the supply lines, which, being parasitic inductances, significantly reduce the working frequency band of the transformer.

Известен также щирокополосный трансформатор 2, содержащий ферритовый сердечник и обмотки, выполненные из согласованных ленточных линий, образованных двум полосами провод щего материала, разделенных диэлектриком , имеющих ввод, вывод и средний вывод. Этот трансформатор вл етс наиболее близким к изобретению по технической сущности и достигаемому результату.Also known is a broadband transformer 2 containing a ferrite core and windings made of matched ribbon lines formed by two bands of conductive material separated by a dielectric, having an input, an output, and an average output. This transformer is closest to the invention in its technical essence and the achieved result.

Его недостаток заключаетс в наличии соединительных проводников, служащих дл соединени между собой линий обмоток и обмоток к подвод щим лини м. Соединительные проводники, вл сь паразитными индуктивност ми , существенно снижают рабочую полосу частот трансформаторов.Its disadvantage lies in the presence of connecting conductors that serve to interconnect the lines of windings and windings to supply lines. The connecting conductors, being parasitic inductances, significantly reduce the working frequency range of transformers.

Цель изобретени - расширение рабочей полосы частот трансформатора.The purpose of the invention is to expand the operating frequency band of the transformer.

Указанна цель достигаетс тем, что обмотки трансформатора выполнены из одного отрезка линии, два конца нижней и верхней полос которой соединены между собой, образу средний вывод, а к двум другим концам и к середине линии подсоединены дополнптельиые отрезки двухпроводной ленточной линии, образующие ввод и вывод трансформатора.This goal is achieved by the fact that the transformer windings are made of one line segment, the two ends of the lower and upper bands of which are interconnected, forming the middle terminal, and the additional two-wire ribbon line segments are connected to the other two ends and the middle of the line. .

Суишость изобретени по сн етс на примере выполнени трансформатора с коэффициентом трансформации 4 : 1 (по сопротивлению ). Трансформаторы подобной конструкции могут быть выполнены и с другими коэффициентами траисформашп.The invention is illustrated by the example of a transformer with a 4: 1 transformation ratio (resistance). Transformers of a similar design can be performed with other traysformats coefficients.

Claims

FIG. 1 image broadband transformer in general; in fig. 2 - a section of the transformer in the place of input and the middle output; in fig. 3 - section of the transformer at the output; in fig. 4 is an electrical diagram of the proposed transformer. The broadband transformer contains 5 ferrite core 1, on which a winding is placed, made of one piece of a two-wire ribbon line, its wave resistance. The winding consists of two parts (halves) of the right 2 and left 3, formed by connecting to the middle of the winding line an additional segment of a rigid two-wire ribbon line 4, which is a low-impedance transformer. The connection of the output to the winding is made in such a way that the dielectrics of both lines are in the same plane, i.e. they are joined, and their strips of conductive material are fixed with an overlap (Fig. 3). Both halves of the ribbon line are wound 20 onto the core, with the connection point of pin 4 being the starting point of the winding. At the meeting point of the right and left windings, the two ends of the lower and upper bands of conductive material are interconnected to form the average lead of the transformer to which outlet 5 is connected. To the other two ends of the bands an additional piece of rigid two-wire ribbon line 6 is connected. Introduced 33 house transformer. Connecting input 6 to the winding and production in such a way that the dielectrics of the lines are located end-to-end, the conductive material strips of the winding and the input are overlapped (Fig. 2). frequencies. This advantage increases as the absolute values of the resistances transformed by the transformer decrease. For this reason, the proposed design is particularly effective in constructing broadband and ultra-wideband transistor power amplifiers of the HF and VHF bands, where the known transformers cannot practically be used. Claims of the Invention A broadband transformer comprising a ferrite core and windings made of matched ribbon lines formed by two bands of conductive material separated by a dielectric, having an input, an output, and an average output, characterized in that, in order to extend the working frequency range, said windings are made of one line segment, the two ends of the lower and upper bands of which are interconnected, forming the middle terminal, and additional lines are connected to the other two ends of the bands and to the middle of the line cutting the tape-wire lines forming input and output transformer. Sources of information taken into account during the examination: 1. US patent 3449704, cl. 336-175, 1969.

2.Hilbert W. Einigegrundzaliche Betrachtungen zu Breitband-Dbertragen, NTZ, 1966, Heft 9, S. 531, 533, Bild 66, 10-b (prototype)

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