Many electric vacuum transmitters are installed in the form of a cabinet. The entire transmitter is a complete electromagnetic system. In addition to the interface of electromagnetic signals, various compatible problems must be solved in this system, whether it is thermal radiation or electromagnetic radiation. To meet the requirements of the transmitter system. The vacuum tube transmitters are each packaged into a housing by a transmitter unit, a high-voltage power supply and a PFC. The housing units are connected by cables. Each unit must meet the compatibility requirements of the transmitter system. Because the heat dissipation conditions between the housings are severe, With closed water cooling.
When designing the housing of the launch unit, hard aluminum is used as the panel material in order to meet the total mass and strength requirements. When assembled, some of the panels are not split and welded (durable aluminum friction stir welding), which improves the EMC tightness, the structural strength of the cabinet, and the space utilization inside the cabinet.
Electromagnetic vacuum transmitter electromagnetic interference path has conductive coupling, inductive coupling, common impedance coupling and radiation coupling. Inductive coupling is divided into electrically conductive inductive coupling and magnetic inductive coupling. Electrically conductive inductive coupling means that if there is a distributed capacitance between two wires, when the voltage on one wire is capacitively coupled to the other wire, it will interfere with the sensitive circuit connected to the wire, and the interference voltage It is related to the source voltage, frequency, distributed capacitance between two wires, and circuit impedance. These parameters determine the strength of the circuit.