SU815772A1 - Broad-band transformer - Google Patents

Description

I

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

H3BecteH is a broadband transformer containing a conductor made of 2N (where N is an integer) of serially connected sections combined into two multi-conductor | 1 lines, the first of which contains odd sections of the conductor, and the second has its even sections, sending a wide working strip 1.

The known device is the closest to the proposed technical essence and the achieved result.

The disadvantage of it is that it cannot be used as a differential transformer by itself.

To form a differential device with two pairs of inputs. All the inputs are symmetrical with respect to the common bus, and the required transformation requires using the mentioned transformer and an additional transformer with galvanically developed windings, which complicates the design of the device and reduces its efficiency by summing up the power losses in both transformers.

The purpose of the invention is to expand the functional capabilities of the transformer while maintaining the extended operating frequency band.

This goal is achieved by the fact that in a broadband transformer

0 containing a conductor made of 2N series-connected sections, combined into two multi-line lines, in the first of the two odd-numbered sections of the conductor, and at its even sections, two additional conductors are introduced, each of which is made of 2H-series-connected sections, in the first multi-wire

The 0 lines contain odd sections of additional conductors, and the second one contains four even lines. their sections, with the beginning of additional conductors placed by the OO side of the middle of the main

5 guides ,. where Nim are integers ..

FIG. 1 shows the electrical circuit of the device in FIG. 2 shows an embodiment of the proposed device with N 2 and

0 M 1 in FIG. 3 - the same with N «2 and M 2; in fig. 4 is the same with N 3 and M 2. As can be seen from FIG. 1, the transformer contains a conductor 1, made from 2N unbreakable sections 1-1, 1-2, 1-3, 1-4 1- (H + 1), 1- {N + 4- 2), .. 1- ( 2N - 1), (the second numeral | for indicates the sequence number of the section. Combined in two multi-wire lines 2 and 3. In the first multi-wire line 2 there are odd sections 1-1, 1-3 ... 1- (2N- 1), and in the second numerical sections 1-2, 1-4 ... 1-2N. Two additional conductors 4 and 5 were inserted into the transformer, each of which is made of 2m sections, 4-1, 4-2, 4 -3, 4-4 4th, 4- (M + 1) ,,. 4- (2M-1), 4-2M and 5-1 5-2, 5-3, 5-4 ... 5 m, 5- (M + 1) ,. 5- (2M-1), 5-2M. The middle of the conductor, i.e., the beginning of the 1- (N + 1) circuit can be connected to the common bus 6. The beginning of the conductor 4 and the end of the conductor 5, the beginning of the conductor 5 and the end of the conductor 4 form, respectively, the first pair of inputs 7 and 8 symmetrical with respect to a common tire b. The ends of sections 4-I and 5-m form one of the inputs 9 of the other pair of inputs, and the ends of the sections of conductor 1 symmetrical with respect to the middle form the second input 10 of another pair of inputs. FIG. Figures 2, 3 and 4 show that some sections of conductors may be formed by the combined external conductors of coaxial lines, the internal conductors. Which serve as sections of conductors. Consider the operation of the device, starting with the simplest version of its implementation, according to FIG. 2. When connecting a generator with a balanced output to the terminals 10, the oscillations enter two identical lines connected in series. One of them is formed by the conductor 1-1 and the combined external conductors 1-3, or rather their outer surface, and the other by conductor 1-4 and the outer surface of the outer conductors of coaxial lines (1-2). Since the lines have equal lengths and equal wave resistances, oscillations of equal amplitude are applied to their outputs. The said lines are connected at their outlets in parallel and as a result of aife, terminals 11 and 12 produce a voltage equal to the voltage in each line, i.e. having a half amplitude (V / 2) with respect to the voltage V on the terminals 10. This the voltage is then again divided into two equal and the same voltage (U /), one comes in lines with conductors 4-1 and 5-1, and the other in similar lines with conductors 4-2 and 5-2. In this case, the clips 9 are equipotential and are considered short-circuited. Passing through the said lines, the voltages arrive at their outputs, which are asymmetrical relative to the common bus 6. Here, the voltages are summed in pairs, giving two symmetrical voltages of amplitude V / 2 on pairs of clamps 7 and 8 with those marked in FIG. 2 half rnost mi. Considering in a similar way the process of oscillation propagation from a source connected to terminals 9, we find that there is no voltage at terminals 10, and terminals 7 and 3 will have voltage of 180 degrees in comparison with those shown in FIG. 2. Consider now the devices of FIG. 3. When a flat terminal 10 of symmetric voltage V is applied, the waves equal to this voltage propagate along two identical two-wire lines: one formed by the outer surfaces of the outer conductors 1-1 and 1-3, and the other 1-2 and 1-4. Reaching the other ends of these lines, these voltages total the voltage 2, which is divided equally (V) between the lines with the internal conductors 4-1 5-1, 4-2 and 5-2. In this case, 9 turn out to be equipotential, the voltage between them is zero, and us can be considered short-circuited. Having entered the aforementioned lines of equal wave resistance, the oscillations reach to their outputs, where they are summed up in pairs and separated on loads connected to terminals 7 and 8. In order that the oscillation from the generator to the loads takes place without reflections, the wave impedance of the lines leaving the generator will be half as much as the wave impedance of each; coaxial line and four times smaller than each of the load resistors connected to terminals 7 and 8. In a similar way, the process of propagation of oscillations from a generator connected to clamp 9 can be considered. At atsm, the voltage is not on. the clamps 10 is zero, and in the loads on the clamps 7 and B, voltages differing in phase by 180 compared with the polarities shown in Fig. 3 are distinguished. 3 in the case of a generator at the terminals 10. In the device according to Lig. 4, the propagation of oscillations is similar. considered with reference to FIG. 3c, with the difference that the transforma- tion coefficient from clamps 10 to clamps 7 and 8 is 5/2. At the same time, in order to ensure complete coordination, we will implement the variant in which the wave impedance of each two-wire line from the wires to 1-1 and 1-5, 1-2 is equal to Tr / 3, where R is the input resistance at the terminals 10.

The characteristic impedance of the lines from conductors 1-3 and 1-5, 1-4 and 1-2 is 3R / 2, the impedances of all coaxial lines are 4R / 9, and the resistance of each of the loads at terminals 7 and 8 is equal to 8R / 9 .

In general, the device ne league. 1 conductors 1-L, 1-3 .... 1- (2N-1) of one multi-wire line 2 and conductors 1-2, 1-4 1-2 of the other multi-conductor line 3 form the transLormator part of the device, and conductors 4 and 5 - the differential part of the device, the same as the coaxial line in FIG. 2-4.

- As a result, we get a wideband di “G) Lorential trans“ o1; Lator with two pairs of symmetric inputs and with an arbitrary variable transL) Ornatsii.

lormula invention

A broadband TpaHcf opnaTop containing a wire made of

2N sequentially connected sections connected to two multi-wire lines, the first of which contains odd sections of the conductor and the second contains even areas of it, characterized in that, in order to expand the functional capabilities while maintaining an extended working band, two additional conductors are introduced of which is made of 2M series-connected sections, and in the first multi-conductor line are. odd sections of additional conductors, and in the second even their parts, and this beginning 5 additional conductors are placed from the middle of the main conductor, where Nim are integers, numbers.

Sources of information taken into account in the examination

1. USSR author's certificate 649050, CL. H 01 F 19/04, 1978.

Claims (2)

Claim A broadband transformer comprising a conductor · made of 2N post-series connected sections combined in two multi-wire lines, the first of which contains odd sections of the conductor, and the second contains even sections of the conductor, characterized in that, in order to expand the functionality while maintaining the expanded operating frequency band, two additional conductors are introduced, each of which is made of 2M series-connected sections, and in the first multi-wire line there are odd sections of additional conductors, and in the second even sections of them, m the beginning of the additional conductors are placed from the side of the middle of the main conductor, where N and M are integers, numbers.