SU1163461A1 - Device for combining powers of power amplifiers - Google Patents

Description

The invention relates to radio engineering and can be used, for example, in the ranges of high and especially high frequencies for adding equal powers of an arbitrary number of broadband generators with symmetrically, metric relative to the common bus outputs or for dividing the power of one generator between the same loads symmetrical with respect to the common bus.

Known broadband device of the addition of the power of electrical oscillations, designed to add the equal power of two generators with symmetric outputs PZ.

Using this device containing two multi-wire lines, as a component in the pairwise summation principle, it is possible to form a device for summing equal powers of a limited number of N = 2 * generators. The number of multi-wire lines is 2 (Ν-ΐ). Since in each of these lines there are losses of transmitted power, especially in those where the total power of several generators passes, the resulting efficiency of such a device is low. In addition, when a multi-wire line is placed on its magnetic core, the number of magnetic cores also increases with the number of generators, which leads to an increase in the overall size of the device.

The closest technical solution to the invention is an electric oscillator power combining device, containing N generators, AND decoupling resistors, two multi-wire lines and a payload, while the end of the first conductor of the first multi-wire line is connected to the beginning of the first conductor of the second multi-wire line, between the end of the second ^ the conductor of the first multi-conductor line and the beginning of the second conductor of the second multi-conductor line, the first generator is switched on, as well as between similar conductors The third and fourth, fifth and sixth, ... (2Ν-1) -th and 2Ν-ή multi-conductor lines are connected to the second, third, ..., генераth generator, respectively, and the remaining conductors of the previous lines are connected in pairs-cross with similar conductors of the subsequent lines in their Beginnings and in the ends; the last conductors of the pairs of lines are connected in parallel and connected to the payload *, between the equipotential outputs of the generators are included decoupling resistors that form two 4 ^- corners ^- , multi-wire lines, if necessary, work at low frequencies are placed in pairs on the магнит-magnetic cores [2_].

A disadvantage of the known device is the low efficiency due to the large number of multi-wire lines, in each of which, as well as in all the magnetic circuits on which they are located, there are power losses.

The purpose of the invention is to increase the efficiency of the device of addition of the power of the generators of electrical oscillations.

To do this, in the device of addition of the power of the oscillator, containing N generators, N decoupling resistors, two multi-wire lines and a payload, while the end of the first conductor of the first multi-wire line is connected to the beginning of the first conductor of the second multi-wire line, between the beginning of the second conductor of the second multi-wire line included the first generator, between the beginning of the first conductor of the first multi-wire line and the end of the first wire Ik of the second multi-wire line included the payload, the second, third, ..., Ν-th generators are connected respectively between the end of the third, fourth, ..., (Ν + +1) -th conductor of the first multi-wire line and the beginning of the third, fourth, ..., (Ν + 1) -th conductor of the second multi-wire line, beginning of the second, third, ..., (Ν-Ι) -γο, Ν-γο and (Ν + 1) -γο conductors of the first multi-wire line are connected respectively with the ends of the third, fourth, ..., Ν-th, (Ν + 1) -γο and second conductors of the second multi-wire line, and through decoupling resistors - corresponding but with the end of the fourth, fifth, ...,

(Ν + 1) -th, second and third prog3 1163461 4

watercraft second multi-line piny.

In addition, in each multi-wire line, the conductors from the second to (Ы + 1) -th are made in the form of internal conductors of segments of coaxial lines, and the outer conductors of segments of coaxial lines connected along the entire length form the first conductors of the corresponding

Multi-conductor lines

FIG. 1 ′ is a circuit diagram of the device; in fig. 2 is a schematic of an embodiment of the device in sections of 15 cuts of coaxial lines; in fig. 3 - private scheme; case of the device for Ν-З with transition to asymmetrical loading; 4 a schematic of the special case of the device 20.

for N = 4 with step-up transformer.

The device (Fig. 1 and 2) contains the first multi-wire line 1, consisting of the first conductor 1.1, 25 of the second conductor 1.2, ..., the Ν-th conductor 1Ν and (Ν + 1) -γο conductor

1. (Y + 1), the second multi-wire line, 2, consisting of the first conductor 2.1, the second conductor 2.2, ..., 30 Ν-th conductor 2Ν and (Ν + 1) -γο conductor 2. (Ν + 1) , first generator

3.1, the second generator 3.2 ..... M th

ZL / generator, the first decoupling resistor 4.1, the second decoupling resistor 4.2, M th decoupling resistor 4Ν, the outputs of the device 5 and 6, to which the payload 7. is connected. Dots denote the beginning of the conductors of multi-wire lines] and 2 (magnetic core is not shown).

A special case of the device (Fig. 3) contains an additional coaxial line 8, combined with the first multi-wire line 1 and connecting the unbalanced payload 7 to the outputs 5 and 6 of the device.

A special case of the device (figure 4) contains additional lines 9 and 10, combined respectively with the first 1 and second 2 multi-wire lines, and connecting the increased load 7 to the outputs 5 and 6 of the device, forming a step-up transformer.

Consider the operation of the device (Fig. 2), since here the segments “.

coaxial lines specify the process of propagation of fluctuations in the summation. If oscillations of the 3.1-3Μ generators are equal-amplitude and biased, then, having entered coaxial lines with (internal) conductors 1.2-1 / Ν + 1) and 2.2-2 / Ν + 1), these oscillations will reach, without reflection, the outputs of these lines. Since decoupling resistors 4.1-4M are connected in a closed ring, the sum of the voltages on them is zero, and with identical generators 3.1-3Ν the voltages on them are equal. This means that the voltage across each decoupling resistor 4.1-4N is zero. Accordingly, these resistors 4.1-4 N can be considered short-circuited. Therefore, the outputs of the coaxial lines are connected in parallel and connected to the payload 7. If the resistance value of the load 7 is equal, and the wave resistance of each coaxial line

ABOUT

equal to ~ 2 then all coaxial lines are matched, and each of the generators' 3.1-3 N is also loaded on the matched load K. As a result, in the operating mode, the longitudinal stresses on all the conductors of the coaxial lines are the same and this does not prevent them from being placed on a common magnetic core.

To determine the magnitude of the junction between the 3.1-ZMi generators confirming from these positions the validity of using one magnetic circuit, we apply the eigenvector method and the corresponding eigenvalues. For each of these vectors, except the in-phase one, which has already been considered as an operating mode, at load 7 the voltage is zero and this load 7 can be considered as short-circuited. Each of the decoupling resistors 4.1-4H is connected for these modes to series-connected outputs of two pairs of coaxial lines, for example, resistor 4.1 - to coaxial lines with (internal) conductors 1.2, 1 / + 1) and 2.2, 2.3. If the magnitude of each of the decoupling resistors 4.1-4 M is equal to K, then matching is provided for each of the eigenvectors (non-working effects of 3.1-3I generators) '

eleven

and the interchange between the generator ma.

When exposed to all vectors except the first one (common-mode) voltage on all conductors of coaxial lines is zero and therefore there is no induction in the magnetic circuit. This means that the voltages on the conductors of the lines are unique for all possible generator modes 3.1-3., And therefore both multi-wire lines 1 and 2 can be placed on a single magnetic core.

Without changing the operation of the device, it is possible to connect the beginning of the conductor 2.1 to the common bus and connect the payload 7 (Fig. 3) to the outputs 5 and 6 via a coordinated additional coaxial line 8 (impedance ~) and that. best accomplish the payload

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7 asymmetrical with respect to a common tire.

Similarly, without disturbing

5 of the device, it is possible to connect a larger load 7 to the outputs 5 and 6 (Figure 4) through additional lines 9 and 10 (wave impedance> by connecting their inputs paral lel ^10, and outputs -. Successively load size is 7 in this case C. this device without

• an additional magnetic circuit combines a transformer of resistance ¹³ and, in addition, galvanic isolation between payload 7 and generators 3.1 (3b) is provided.

Thus, in the proposed

20, due to the reduction in the number of multi-wire lines and, accordingly, the number of magnetic cores, the power losses are reduced, i.e. efficiency increase.

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Claims (2)

1. DEVICE OF DEVELOPMENT OF POWER OF ELECTRIC GENERATORS-. KIH VIBRATIONS, containing N generators, N decoupling resistors, two multi-wire lines and a payload, with the end of the first conductor of the first multi-wire line connected to the beginning of the first conductor of the second multi-wire line, between the end of the second conductor of the first multi-wire line and the beginning of the second conductor of the second multi-wire line includes a first generator, characterized in that, in order to increase efficiency, between the beginning of the first conductor of the first multi-wire line and the end of the first conductor of the second multi-wire line, the payload is turned on, second, third, ..., Νth generator connected, respectively, between the end of the third, fourth, ..., (Ν + 1) th conductor of the first multi-wire line and the beginning of the third, fourth, ..., (Ν + 1) -γο conductor of the second multi-wire line, beginning of the second, third, ..., (Y-1) -th, Ν-th and (Ν + +1 ) -th conductors of the first multi-wire line are connected respectively to the ends of the third, fourth, ..., Ν-th, (Ν + 1) -th and second conductors of the second multi-wire line and through decoupling resistors - respectively to the ends of the fourth, fifth, .. ., (Ν + 1) _th? the second and third conductors of the second multi-line. 2. Device by π. 1, characterized in that in each multi-wire line the conductors from the second to (Ν + 1) -th are made in the form of internal conductors of segments of coaxial lines, while the external conductors of segments of coaxial lines are connected along the entire length and form the first conductors of the corresponding multi-wire lines. zi η 1163461 > one 1163461 2