【摘要】 为模拟电磁波在自由空间的传输状态，研制了用于生物医学工程研究的大型专用微波暗室。设计的微波暗室静空间体积为６ｍ×５ｍ×５ｍ。静区为直径６０ｃｍ，长１２０ｃｍ的园柱体，位于暗室几何中心。在测试频率３．２ＧＨｚ、５．５ＧＨｚ、９．４ＧＨｚ及垂直极化和水平极化条件下，静区反射系数优于－４５ｄＢ，横向场幅不均匀度优于±０．２５ｄＢ，纵向场幅不均匀度＜＋２ｄＢ。该微波暗室结构合理、性能优良，对开展电磁生物医学工程学研究有实用价值。更多还原

【Abstract】 To simulate transmission conditions of EM wave in free space,the biomedical microwave anechoic chamber used for biomedical engineering research was developed.The volume of the net space zone of the designed chamber is 6m×5m×5m.Quiet zone is a cylinder with a length of 120cm and a diameter of Φ60cm located at the geometric centre of the anechoic chamber.Under the condition of 3.2GHz,5.5GHz,9.4GHz testing frequency,vertical polarization and horizontal polarization,the reflection coefficient of quiet zone is less than 45dB,the nonuniformity of transverse field amplitude is ±0.25dB and the nonuniformity of logitudinal field amplitude is under +2dB.更多还原