声表面波(SAW)滤波器质量评定.第2部分:使用指南

[中文适用范围]： IEC 60862 的这一部分提供了有关电信@测量设备@雷达系统和消费产品中使用的 SAW 滤波器的实用指南。应参考 IEC 60862-1 了解一般信息、标准值和测试条件。 SAW滤波器现已广泛应用于电视@卫星通信@光纤通信@移动通信等多种应用领域。虽然这些 SAW 滤波器有各种规格@，但其中许多可以分为几个基本类别。 IEC 60862的这一部分包括各种滤波器配置@，其工作频率范围约为10 MHz至3 GHz，相对带宽约为中心频率的0@02 %至50 %。本标准的目的不是解释理论@，也不是试图涵盖实际情况中可能出现的所有可能性。该标准提请注意一些更基本的问题@，用户在为新应用订购 SAW 滤波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。 IEC 60862 系列中给出的标准规范@和国家规范或制造商发布的详细规范@定义了标称频率@通带带宽@纹波@形状系数@端接阻抗@等的可用组合。这些规范经过编译，包括各种具有标准化性能的 SAW 滤波器。无论如何强调，用户都应尽可能从这些规范中选择 SAW 滤波器（如果可用），即使这可能导致对其电路进行少量修改以使用标准滤波器。这尤其适用于标称频率的选择。 [外文原描述]： IEC 60862-2:2012 gives practical guidance on the use of SAW filters which are used in telecommunications, measuring equipment, radar systems and consumer products. IEC 60862-1 should be referred to for general information, standard values and test conditions. This part of IEC 60862 includes various kinds of filter configuration, of which the operating frequency range is from approximately 10 MHz to 3 GHz and the relative bandwidth is about 0,02 % to 50 % of the centre frequency. It is not the aim of this standard to explain theory, nor to attempt to cover all the eventualities which may arise in practical circumstances. This standard draws attention to some of the more fundamental questions, which should be considered by the user before he places an order for a SAW filter for a new application. Such a procedure will be the user's insurance against unsatisfactory performance. This edition includes the following significant technical changes with respect to the previous edition: - Clause 3 "Terms and definitions" has been deleted to be included in the next edition of IEC 60862-1; - the tapered IDT filter and the RSPUDT filter have been added to the clause of SAW transversal filters. Also DART, DWSF and EWC have been added as variations of SPUDT; - the balanced connection has been added to the subclause of coupled resonator filters; - recent substrate materials have been described; - a subclause about packaging of SAW filters has been added.