TE<0>0n/TE<0>1n mode exciter

Abstract

The invention discloses a TE<0>0n / TE<0>1n mode exciter. In the TE<0>0n / TE<0>1n mode exciter, one end of a first rectangular waveguide (1-2) is connected with an input port (1-1), one end of the first rectangular waveguide (1-2) is connected with a first first-order matching step waveguide (1-3), one end of a second rectangular waveguide (1-4) is connected with the first first-order matching step waveguide (1-3), one end of the second rectangular waveguide (1-4) is connected with a second first-order matching step waveguide (1-5), a short-circuit surface is arranged at the other end of the second first-order matching step waveguide (1-5), one end of a third rectangular waveguide (1-8) is connected with the side wall of the second rectangular waveguide (1-4) through a coupling hole (1-7), one end of the third rectangular waveguide (1-8) is connected with a third first-order matching step waveguide (2-2), one end of a first round waveguide (2-5) is connected with the third first-order matching step waveguide (2-2), one end of the first round waveguide (2-5) is connected with a gradually-charging round waveguide (2-6), one end of the second round waveguide (2-7) is connected with the gradually-charging round waveguide (2-6), one end of the second round waveguide (2-7) is connected with an output port (2-1), and symmetric ridges with different sizes are arranged on the inner wall of the first round waveguide (2-5). The TE<0>0n / TE<0>1n mode exciter has the advantages of low reflection, high mode purity, and relatively wide working bandwidth.

Description

technical field [0001] The invention belongs to the field of microwave and millimeter wave technology, and in particular relates to a mode excitation device for cold measurement of a high-frequency system of a cyclotron amplifier, a cycloklystron and a cyclotron oscillation tube. Background technique [0002] Mode converters have important applications in microwave and millimeter wave communications, testing, and solid-state power combining. In recent years, great progress has been made in the development of cyclotron amplifiers (including cyclotron traveling wave tubes and cyclotron klystrons) and cyclotron oscillator tubes at home and abroad. The working mode output by the gyrotron cavity is generally not suitable for direct use, so the performance of the system cannot be verified. Therefore, it is often necessary to convert these modes into a form that is convenient for direct use through mode conversion, so it is necessary to design a mode exciter to control the gyrotron...

AI Technical Summary

Problems solved by technology

For example, the cross-shaped converter disclosed in "Journal of Vacuum Science and Technology, 2013, Vol. 33 (4), 309-314", although its operating frequency bandwidth is wide, the output The mode has high purity, but it needs to be produced by electroforming, the device is large in size and expensive

And the H-plane bending mode converter disclosed in ""Strong Laser and Particle Beam", 2014, Volume 26 (6)", the exciter conversion efficiency of this structure is above 95%, and the mode purity is above 98% The relative bandwidth can reach 4.2GHz. Although the bandwidth and mode purity are relatively high, the structure is simple but the flexibility is not enough, and it is inconvenient to convert to a higher-order mode.

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