标准摘要
[中文适用范围]： IEC 62604 的这一部分涉及双工器@，它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。它们通常用于使用 CDMA 系统的移动电话，例如 N-CDMA@ W-CDMA / 通用移动电信系统 (UMTS)。到目前为止，主要使用介质双工器。然而，最近，利用表面声波(SAW)@的SAW双工器@越来越流行，并在最近的移动电话中逐年取代介质双工器@，因为它们具有尺寸小、重量轻和良好的电气性能的优点。除了SAW双工器@之外，利用体声波(BAW)@的BAW双工器@也因其更高的Q特性和更好的性能（尤其是在PCS频段）而受到关注和流行。这些指南的目的既不是解释理论@，也不是试图涵盖实际情况中可能出现的所有可能性。这些指南提请注意一些更基本的问题@，用户在为新应用订购 SAW 和 BAW 双工器之前应考虑这些问题。这样的程序将成为用户防止性能不佳的保障。由于 SAW 和 BAW 双工器在使用方面具有非常相似的性能@，因此在一个标准中描述这两种双工器对于用户来说非常有用且方便。标准规范@，例如IEC的标准规范@（这些指南构成了其中的一部分@）和国家规范或制造商发布的详细规范@将定义每个发射和接收滤波器和隔离级别的中心频率@通带带宽和插入衰减的可用组合这些规范的编制包括各种具有标准化性能的 SAW 和 BAW 双工器。无论如何强调，用户都应该@尽可能@在可用时@从这些规范中选择他的双工器@即使这可能导致对其电路进行小的修改以启用标准双工器。这尤其适用于正常频率的选择。 [外文原描述]： IEC 62604-2:2011 concerns the duplexers, which can separate receiving signal from transmitting signal and are key components for two-way radio communications. They are generally used in mobile phones using CDMA systems such as N-CDMA, W-CDMA / Universal Mobile Telecommunication System (UMTS). So far, dielectric duplexers have been mainly used. However, recently SAW duplexers, which are utilized surface acoustic wave (SAW), are becoming popular and replacing the dielectric duplexers year by year in recent mobile phones, because of their advantage of small size, light weight and good electrical performances. In addition to SAW duplexers, BAW duplexers, which are utilized bulk acoustic wave (BAW), are also becoming in the spotlight and popular because of their higher Q property and better performances especially in PCS band. It is neither the aim of these guidelines to explain theory, nor to attempt to cover all the eventualities which may arise in practical circumstances. These guidelines draw attention to some of the more fundamental questions, which should 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.
英文名称Surface acoustic wave (SAW) and bulk acoustic wave (BAW) duplexers of assessed quality - Part 2: Guideline for the use