W-waveband pulse traveling-wave tube high-power combination system

Abstract

The invention belongs to the technical field of millimeter waves and particularly relates to a W-waveband pulse traveling-wave tube high-power combination system. The system comprises a waveguide power divider, a first adjustable attenuator, a first solid-state amplifier, a first isolator, a first traveling-wave tube amplifier, a second adjustable attenuator, a phase shifter, a second solid-state amplifier, a second isolator, a second traveling-wave tube amplifier and a waveguide power combiner. According to the W-waveband pulse traveling-wave tube high-power combination system, high-power combination of a W-waveband two-way pulse traveling-wave tube is achieved technically, the two ways are respectively provided with an isolator, and therefore the solid-state amplifiers can be prevented from being burnt; the same signal source power is divided into two through the power divider with the output phase difference of 90 degrees, a 90-degree phase difference exists between the two ways to prevent mutual interference and self excitation of the two traveling-wave tube amplifiers, and a 90-degree phase difference exists between two inputs of the power combiner to guarantee effective combination of two ways of power.

Description

technical field [0001] The invention belongs to the field of microwave and millimeter wave technology, and in particular relates to a W-band pulse traveling wave tube high-power synthesis system. Background technique [0002] In modern microwave and millimeter wave radar systems, the radar transmission power is a very important index to measure the performance of the radar system. The increase of transmission power means that the radar has a larger detection radius and stronger anti-interference ability. In order to pursue the high-power transmission of fully coherent pulse radar and imaging radar, electric vacuum devices represented by traveling wave tube amplifiers are widely used in the transmitter system of this type of radar. Due to the limitations of basic conditions such as technology and materials, the current output pulse power of a single traveling wave tube amplifier can only reach about 100-150W, which is difficult to meet the requirements of millimeter-wave rada...

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Problems solved by technology

In addition, with the increase of the frequency, the volume of the device is greatly reduced, and the requirements for processing precision and processing technology are higher, which increases the difficulty of system design. However, the biggest technical difficulty of the entire system is how to prevent high gain The self-excitation of the traveling wave tube amplifier and the backflow of electromagnetic wave energy at the output of the traveling wave tube amplifier, because in this case the burning of the traveling wave tube amplifier will occur

As far as the current investigation is concerned, there are no reports of successful development of high-power synthesis of high-power W-band pulsed traveling wave tube amplifiers at home and abroad.

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