SU858123A1 - Broad-band transformer - Google Patents

Description

(54) BROADBAND TRANSFORMER

one

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

A wideband transformer is known, made in the form of two two-wire lines, the inputs of which are connected in parallel asymmetrically with respect to the common bus, and the outputs are sequentially symmetrical with respect to the common bus, providing a transformation ratio equal to two, and balancing: the transition from unbalanced with respect to the common bus voltage to twice the symmetrical l

The disadvantages of this device are the presence of asymmetry, which increases with an increase in the transformation ratio, and a lower upper limit frequency.

The closest in technical essence and the achieved effect is a broadband transformer.

Containing the 1st shielding and shielding conductors made each of an even number of consecutively connected sections, combined into two multi-wire lines, the first of which contains sections of conductors with odd order numbers, and the second with even order numbers, with the start of screening the conductor is connected to the common busbar, and the beginning of the shielded conductor is connected to an additional conductor, the portions of which are located in the aforementioned multi-wire lines |.

Claims (2)

A disadvantage of the known device is the limited functionality, due to the fact that the middle point of the symmetrical winding must be connected to a common bus and thus there may be no current balance in this winding. Such a transformer cannot be used, for example, at a distance from the ground, 3 (for connection at a height to the antenna), as well as in other cases, for example, in various physical devices where the midpoint of the center point of a symmetrical winding is unacceptable. The purpose of the invention is to expand the functionality. This goal is achieved by the fact that in a broadband transformer containing shielding and shielding conductors, each made of an even number of series-connected sections combined into two multi-conductor lines, the first 3 of which contain sections of wires (NIKOV with odd-numbered numbers, and in the second, with even numbers, the beginning of the shielding conductor is connected to the common bus, an additional two-wire line is introduced, and the end of the shielded conductor is connected to one m end of said first additional conductor hydrochloric two-wire line, another conductor is connected at both ends to the common bus. Moreover, the characteristic impedance equal to the additional two-wire line but between the characteristic impedance and the shadowed scr niruyuschim conductors Circuitry invention is represented.) 1 in the drawing. The broadband transformer contains shielded conductor I and shielded conductor 2, each made from an even number of sections (not indicated). The beginning of the shielding conductor 1 is connected to common bus 3 (beginnings are indicated by a dot). The plots of conductors 1 and 2 with odd sequence numbers are located in the multi-wire line 4, and the areas with even numbers and serial numbers are located in the multi-conductor line 5. The end of the screened conductor 2 is connected to one end of the first (internal screened conductor) additional two-wire conductor line 6, the other conductor of which is connected at both ends with the common bus 3. The beginning of the shielded conductor 2 and the other end of the first conductor of the line 6 form the symmetrical input 7 and 8 of the transformer, to which the symmetric connection is connected respect to the common bus 9. Starting iagruzka odd portion provodyu1ka t 4 forms an asymmetrical course of the transformer 10, to which connecting a voltage source 11. The device operates as follows obazom. Asymmetric with respect to common ini 3, the voltage V of the source 11 operates at the input of two multi-conductor inia 3 and 4, formed by the external surfaces of the shielding conductor 1. Under certain wave conductivities in these multi-conductor lines, the voltage from the source 11 is country-generated where N is the number of sections of line 1; M is the sequence number of a parcel with an odd sequence number to which source 10 is connected, and asymmetrical with respect to common bus 3 takes place at the end of shield conductor 1. Here, this voltage divides | with equally between two two-wire lines: line 6 and line formed by the inner surface of the shielding conductor 1 and shielded conductor 2. With the characteristic of the wave resistances and electrical lengths of these lines, the voltage at their outputs is summed up in the matched load 9, the resistance of which is two times for more wave resistance of the line 6. Thus, the load 9 is affected by a voltage symmetrical with respect to the common busbar 3, and the transformer winding, connected in parallel with the load 9, is symmetrical and does not have a grounded center. Claim 1. Broadband transformer containing shielding and shielded conductors made of each of an even number of series-connected sections combined into two multi-wire lines, the first of which contains sections of conductors with odd serial numbers, and the second with even even serial numbers , at the same time, the beginning of the shielding of the conductor is connected to a common length, characterized in that, in order to expand the functionality of the possibilities, an additional two-wire line is introduced, and an end of a shielded provodHHi connected to one end of said first additional conductor wire line, one conductor of which is connected at both ends to the common bus. . 2. The device according to claim 1, about 1 tl and which is that the characteristic impedance of the additional two-conductor water line is equal to the characteristic impedance between the shielding and the shielded conductors. Sources of information taken into account in the examination 1. US patent 3428886, cl. 333-33, 1969. 2. Authors certificate of the USSR 649050, cl. H 01 F 19/04, 1979.