Suppression method for group delay of coupled-cavity traveling-wave tube
A traveling wave tube and coupled cavity technology is applied in the field of suppressing the group delay of the coupled cavity traveling wave tube, which can solve the problems affecting the time synchronization accuracy, pseudorange measurement, and the influence of signal propagation delay, so as to meet the requirements of group delay. , to improve the degree of synchronization, to achieve the effect of suppression
Active Publication Date: 2018-05-18
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology
The requirements for the time accuracy of the amplifier are getting higher and higher, and the group delay of the amplifier will affect the delay of signal propagation, which in turn will affect the time synchronization accuracy and pseudo-range measurement
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[0018] The technical solution of the present invention will be further described below in conjunction with the accompanying drawings.
[0019] Such as figure 1 As shown, a method for suppressing the group delay of a coupled cavity traveling wave tube includes the following steps:
[0020] S1. Scanning and calculating the period length of the coupled cavity traveling wave tube to obtain its dispersion characteristic curves at different period lengths;
[0021] S2. Gradually increase the opening angle of the coupling slot of the coupling cavity traveling wave tube at a certain angle each time, and perform period length scanning calculation for each coupling cavity traveling wave tube with different coupling slot angles to obtain the opening angle of each different coupling slot and the dispersion characteristic curves of the coupled cavity traveling wave tube under different period lengths;
[0022] S3. Comparing each dispersion characteristic curve, a series of coupling cavit...
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The invention discloses a suppression method for group delay of a coupled-cavity traveling-wave tube. The method comprises the following steps of (S1) carrying out period length scanning calculation on the coupled-cavity traveling-wave tube to obtain dispersion characteristic curves thereof; (S2) gradually increasing coupling slot opening angles of the coupled-cavity traveling-wave tube and carrying out period length scanning calculation on the coupled-cavity traveling-wave tube under different coupling slot opening angles separately; (S3) obtaining coupled-cavity traveling-wave tube structures with the same phase speed under different coupling slot opening angles and period lengths; and (S4) carrying out beam-wave interaction calculation on the coupled-cavity traveling-wave tube structures obtained in the step (S3) separately and taking the structure with the minimum group delay under the coupling slot opening angle and the period length as the final structure of the coupled-cavity traveling-wave tube under the condition of meeting the output power requirements. According to the suppression method, the synchronization degree of electron beams and waves in the whole band is improved through reasonably controlling the coupling slot opening angles and the period lengths, so that suppression of the group delay is effectively achieved and the group delay requirements of a travelingwave tube amplifier on the coupled-cavity traveling-wave tube are met.
Description
technical field [0001] The invention belongs to the nonlinear field of coupling cavity traveling wave tubes, in particular to a method for suppressing group time delay of coupling cavity traveling wave tubes. Background technique [0002] Coupled cavity traveling wave tube is a microwave amplifier with high efficiency, high gain, high power, and good heat dissipation. At present, dozens of types of coupled cavity traveling wave tubes have been used in ship-borne, airborne missile-borne and ground military In electronic equipment, it is widely used in satellite, ground communication and remote sensing. With the increasing requirement of time synchronization precision in communication and other fields, the precision requirement has reached 1-2 ns. The requirements for the time accuracy of the amplifier are also getting higher and higher, and the group delay of the amplifier will affect the delay of signal propagation, and then affect the time synchronization accuracy and pseu...
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IPC IPC(8): H01J25/34H01J23/27
CPCH01J23/27H01J25/34
Inventor 胡玉禄郝晓宇胡权朱小芳杨中海李斌
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA