屏蔽暗室

暗室分为电波暗室，微波暗室，雷达防真测试暗室。

An-echoic chamber is divided into an-echoic chamber,microwave an-echoic chamber and radar anti fidelity test an-echoic chamber.

应用范围 RANGE OF APPLICATION

主要用于辐射无线电骚扰(EMI)和辐射敏感度(EMS)测量，电波暗室的尺寸和射频吸波材料的选用主要由受试设备(EUT)的外行尺寸和测试要求确定，分1m法、3m法或10m法。

It is mainly used for the measurement of radiated radio disturbance(EMI)and radiation sensitivity(EMS).The size of an-echoic chamber and the selection of RF absorbing materials are mainly deter-mined by the external dimension and test requirements of EUT,which can be divided into 1m method,3M method or 10m method.

性能指标 PERFORMANCE INDEX

屏蔽范围：30MHz~18GHz

· 吸波材料反射损耗：30MHz~18GHz≥15dB

· 屏蔽室屏蔽性能

测试方法按GB12190-90标准

· 归一化场地衰减±4dB, 场均允许0~6dB，符合GJB2926-97标准。Shielding range:30MHz~18GHz

·Reflection loss of absorbing material:30MHz～18GHz≥15dB 

·Shielding performance of shielding room

The test method is in accordance with the standard of gb12190-90.The normalized site attenuation is±4dB,and the field is allowed to be 0~6dB,which conforms to gjb2926-97 standard.

结构组成 STRUCTURAL COMPOSITION

· 屏蔽室：屏蔽室由屏蔽壳体、屏蔽门、通风波导窗及各类电源滤波器等组成。

· 吸波材料：

(1)单层铁氧体片：工作频率范围30mHz~100mHz。

(2)锥形含碳海绵吸波材料。

· 其他：主要有信号传输板、转台、天线、监控系统。

·Shielding room:the shielding room is composed of shielding shell,screen door,ventilation wave guide window and various power filters.

·Absorbing materials:

(1)single layer ferrite sheet:working frequency range:30MHz～100MHz.

(2)Conical carbon sponge absorbing material.

·Others:mainly signal transmission board,turntable,antenna,monitoring system.