SU466606A1 - External excitation generator - Google Patents

Description

(54) GENERATOR WITH EXTERNAL EXCITATION

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The invention relates to radio engineering.

A generator with external excitation is known that allows transmitting power twice as high as the maximum allowable power for which the used power amplifiers are designed.

However, the gain of such a generator with external excitation does not exceed the gain of one of the power amplifiers, V: connected between the hybrid and the articulated.

The purpose of the invention is to increase the gain factor - in the proposed generator, the output arm of the output hybrid joint is connected to the idle shoulder of the input joint, and the useful load is connected to the idle shoulder of the output joint. As a result of the retransmission of the amplified signal, the gain of the generator with external excitation is quadrupled compared to the gain of one of the power amplifiers connected between the hybrid joints. In this case, an external excitation generator circuit allows transmitting power twice as much as the maximum permissible power to which the used power amplifiers are designed.

FIG. 1 shows a generator circuit with external excitation; pas figs. 2 - directional graph of the formation of an amplified signal.

Between hybrid joints 1 and 2, power amplifiers 3 and 4 are included. The idle arms of the hybrid joints are connected by conductor 5.

The input signal arrives D nleko 6 and is divided equally in the input hybrid joint 1 between shoulders 7 and 8. The junction signals are amplified and fed to shoulders 9 and 10 of the hybrid joint 2. In arm 11, a total signal is extracted, which

the conductor 5 is transmitted to the shoulder 12 of the input hybrid joint. Since arm 11 is also oriented relative to arm 6, as arm 13 relative to arm 12 (due to the symmetry of the circuit), the amplified signal

is again amplified and highlighted in shoulder. 13. The graphical interpretation of the above is presented in the form of a directional graph of the formation of the amplified signal in FIG. 2. Due to the double amplification of the signal, the resulting gain of the generator with external excitation is quadrupled compared to the gain of the power amplifier 3 or 4, and due to the separation of the signal into two drops, the transmitted power can double the maximum permissible value of the power amplifiers.

Subject invention

External Excitation Generator Containing Input and Output Hybrid Counts I- -1 -1 i-iZh

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and two power amplifiers connected between them, l and h-ya and u, in order to increase the gain, the output of the output hybrid articulation is connected to the iC by the input articulation arm, and the useful load is connected to the idle arm of the output articulation.

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