风冷大功率固态发射机结构设计

Structure Design of Air-cooling High Power Solid-state Transmitter

固态发射机输出功率大,热耗高,电磁环境严酷,调试、运行和维护过程中人员介入多,因此,结构设计需重点解决提高设备可靠性和提升用户体验两大关键问题。文中提出模块化和快速插拔的总体结构方案,从峰值功率、平均功率和屏蔽效能三方面进行大功率射频连接器选型,从空间屏蔽和能量吸收两方面进行电磁防护,采用叠层和柔性形态的汇流条进行大电流馈电。这些方法和措施解决了发射机因输出功率大而出现的互联环节易打火和易发生电磁干扰的问题。在热设计满足散热需求的条件下,提出串接除尘器和封闭式环控两种除尘方法。从声源噪声控制、声传播过程消声与吸声以及声接收者保护三方面介绍了风冷发射机的降噪措施。

The solid-state transmitter has high output power,high heat consumption and tough electromagnetic environment.A large number of personnel or engineers are involved in the processes of debugging,operation and maintenance.Therefore,the structure design should focus on two key issues of improving equipment reliability and improving user experience.The overall structure schemes of modularization and quick plugging are proposed in this paper.High power RF connectors are selected according to peak power,average power and shielding effciency.Electromagnetic protections are carried out from both space shielding and energy absorption.The bus bars with laminated and flexible form are used for high current feeding.These methods and measures have solved the problems that the transmitter is easy to ignite during connection and is prone to electromagnetic interference due to its high output power.Under the condition that the thermal design meets the heat dissipation requirement,two dust removal methods of series dust collectors and closed loop control are also illustrated.The noise reduction measures of air-cooling transmitter are introduced from noise control of sound source,noise elimination and absorption during sound propagation process,and sound receiver protection.