IEC 62604-2:20 22作为IEC 62604-2:20 22 RLV提供，其中包含国际标准及其红线版本，显示了与上一版本相比技术内容的所有变化。IEC 62604-2:20 22适用于双工器可以将接收信号与发射信号分开，是双向无线电通信的关键组件，通常用于符合CDMA系统的移动电话系统中，例如第二代移动电信系统(2G)、W-CDMA/UMTS(3G)或LTE(4G)中的N-CDMA。这些指南提请注意关于SAW和BAW双工器理论以及如何使用它们的一些基本问题，用户在为新应用订购SAW和BAW双工器之前将考虑这些问题。这种程序将是用户防止性能不令人满意的保险。因为SAW和BAW双工器在使用上具有非常相似的性能，所以在一个标准中描述这两种双工器对用户来说是有用和方便的。与上一版相比，此版本包括以下重大技术变更: -条款3中增加了术语“交叉隔离”； 描述了多路复用器。 注:在本文件中，SAW和BAW双工器被同时处理，因为这两种双工器以相同的方式使用，特别是在移动电话系统中，并且具有相同的特性、测试方法等要求。

IEC 62604-2:2022 is available as IEC 62604-2:2022 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.

IEC 62604-2:2022 applies to duplexers which can separate receiving signals from transmitting signals and are key components for two-way radio communications, and which are generally used in mobile phone systems compliant with CDMA systems such as N-CDMA in second generation mobile telecommunication systems (2G), W-CDMA / UMTS (3G) or LTE (4G). These guidelines draw attention to some fundamental questions about the theory of SAW and BAW duplexers and how to use them, which will be considered by the user before he places an order for SAW and BAW duplexers for a new application. Such a procedure will be the user’s insurance against unsatisfactory performance. Because SAW and BAW duplexers have very similar performance for the usage, it is useful and convenient for users that both duplexers are described in one standard. This edition includes the following significant technical changes with respect to the previous edition:
- the term "cross-isolation" has been added to Clause 3;
- multiplexers are described.
NOTE In this document, SAW and BAW duplexers are treated simultaneously because both duplexers are used in the same manner, especially in mobile phone systems and have the same requirements of characteristics, test method and so on.