新型GTEM室可克服传统横电磁室可用频率上限低的缺点,这是由于其结构渐变、避免表面锐棱转折和引入吸波材料,故可用于2GHz或更高频率。本文论述GTEM的原理和设计方法,特别关注该结构的特性阻抗的规律。文中指出了准静态分析法的局限,建议从导波系统的更普遍、更严格的观点处理这一问题。 The new GTEM chamber overcomes the shortcomings of the traditional high transverse frequencies available in the electromagnetic room. This is due to its structural gradation, sharp edge transitions and the introduction of absorbing materials, so it can be used at 2 GHz or higher. This article discusses the principles and design of GTEM, with particular attention to the law of the characteristic impedance of the structure. The paper points out the limitations of quasi-static analysis and suggests to deal with this issue from the more general and rigorous point of view of guided wave systems.