复杂电磁环境下的T/R组件设计

T/R module design in complex electromagnetic environment

为使高频高速大功率收发(T/R)组件在复杂电磁环境下可靠稳定工作,本文对组件的开关控制、组件电源与地、组件布局与屏蔽等进行分析,提出了注意要点,并给出了设计方法。在T/R组件开关控制设计中,通过一对延迟与共轭延迟电路保证收发时间长于驱动开关时间,解决共模干扰问题;通过脉宽检测及最高切换速度约束,解决差模干扰问题;在组件电源与地的分析中,着重强调了接地间距不超过信号波长的1/20。在布局与屏蔽的设计中,着重分析了腔体谐振波长。文中给出了实例模块,并就上述3点设计要点进行了对照分析,达到在复杂电磁环境下T/R组件稳定可靠工作的目的。

In order to make the high-frequency high-speed high-power transceiver component Transmitter and Receiver(T/R)work reliably and stably in complex electromagnetic environment,the design of component switching control,component power supply and ground,component layout and shielding are analyzed,the points of attention are suggested,and the design method is put forward.In the T/R component switching control design,the common mode interference problem is solved by a pair of delay and conjugate delay circuits to ensure that the transceiver time is longer than the driving switching time.The differential mode interference problem is solved by pulse width detection and maximum switching speed constraint.In the analysis of power supply and ground,the ground spacing is emphasized to not exceed one-twentieth of the signal wavelength.In the design of layout and shielding,the cavity resonance wavelength is analyzed in emphasis.Example modules are given and the above three design points are analyzed against each other to finally achieve stable and reliable operation in complex electromagnetic environments.