空心金属波导 第2部分：普通矩形波导的相关规范

[中文适用范围]： IEC 60153-2:2025 规定了用于射频电气应用中作为波导的普通矩形截面直空金属管。本文件标题中提到的“普通矩形波导”指的是截面比b/a为0.5（或略小）的矩形波导。本文件的目的是对空心金属波导规定以下内容：a) 确保兼容性和必要时互换性所需的细节；b) 测试方法；c) 电气和机械性能的统一要求。本文件不包含对所用材料的任何强制性规格，仅提供示例。材料的具体选择应由买方和卖方协商确定。本第四版取消并替换了2016年发布的第三版。本版构成技术修订版。与前一版相比，本版包括以下重大技术更改：a) 增加了波导的横截面视图；b) 增加了关于标准理论背景的信息内容；c) 在适当的情况下，波导标识中使用小写“k”；d) 修订主规格表（现为表1）：1) 两个波导移动到表格末尾（R 35，R 41）；2) 更正一个波导标识（现为R 26k）；3) 更正一个波导外部宽度（R 18）；4) 放宽R 14至R 70波导外部尺寸的公差；5) 删除了由金、铝和不锈钢制成的波导的衰减值；6) 实现了理想化铜波导的衰减值；e) 放宽了表中R 14至R 70波导外部尺寸的公差（现称为表4）；f) 明确电气测试：1) 使用标准退火铜作为波导管的参考材料；2) 更正了计算理想化铜波导理论衰减值的公式；3) 增加了计算任何材料制成的波导理论衰减值的公式；4) 增加了典型波导材料的参考表（表5）；g) 增加了波导类型标识的参考信息（附录A）。 [外文原描述]： IEC 60153-2:2025 specifies straight hollow metallic tubing of ordinary rectangular cross-section for use as waveguides in radio frequency electrical applications. The term "ordinary rectangular waveguide" in the title of this document refers to rectangular waveguides with a b-to-a ratio of 0,5 (or slightly less). The objective of this document is to specify for hollow metallic waveguides: a) the details necessary to ensure compatibility and, as far as is essential, interchangeability; b) test methods; c) uniform requirements for the electrical and mechanical properties. This document does not contain any binding specifications for the materials to be used, but merely examples. The exact selection of materials is subject to agreement between the customer and the supplier. This fourth edition cancels and replaces the third edition published in 2016. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) addition of a cross-sectional view of the waveguide; b) addition of informative content on the theoretical background of the standard; c) use of a lower case "k" in the waveguide designation, where appropriate; d) revision of main specification table (now Table 1): 1) two waveguides moved to the end of the table (R 35, R 41); 2) correction of one waveguide designation (now R 26k); 3) correction of one waveguide outside width (R 18); 4) relaxation of tolerances of waveguide outside dimensions (R 14 to R 70); 5) removed attenuation values of waveguides made of gold, aluminium, and stainless steel; 6) implementation of attenuation values for an idealised copper waveguide; e) relaxation of tolerances of waveguide outside dimensions for R 14 to R 70 in the table now referred to as Table 4; f) clarification of the electrical tests: 1) use of standard annealed copper as the reference material for waveguide tubes; 2) correction of the formula for calculating the theoretical attenuation of an idealised copper waveguide; 3) addition of a formula for calculating the theoretical attenuation of waveguides made of any material; 4) addition of an informative table with typical waveguide materials (Table 5); g) addition of an informative cross-reference for waveguide type designations (Annex A).