| 摘要 |
PURPOSE: A radar level measuring system with an improved floating ground structure is provided to improve the efficiency of outputting electromagnetic waves, to minimize a loss thereof, and to uniformly distributing capacitance throughout the whole surface of a PCB(Printed Circuit Board). CONSTITUTION: A radar level measuring system with an improved floating ground structure comprises an antenna(3) and a circuit unit(1). The antenna is positioned inside a tank for measuring the level of a tank of a vessel, thereby transceiving electromagnetic waves. The circuit unit generates electromagnetic waves received in the antenna and analyzes the same, thereby measuring the level of the inside of the tank. Parts of a circuit are seated in the circuit unit, and PCBs electrically connected to the circuit unit are formed into a multilayer. The whole substrate of the lowest layer of the PCB is float-grounded in a frame of the vessel without being connected to the circuit so that the capacitance is uniformly distributed throughout the PCB. |
