IEC 61337-2:2004-07（en fr）提请注意一些更基本的问题，用户在订购新应用的介质滤波器之前，应考虑这些问题。它仅限于使用波导型介质谐振器的滤波器，用于便携式电话、蜂窝基站和无线电链路等微波应用。

IEC 61337-2:2004-07(en-fr) draws attention to some of the more fundamental questions which should be considered by the user before he places an order for dielectric filters for a new application. It is limited to filters using waveguide type dielectric resonators that are used for microwave applications such as portable phones, cellular base stations and radio links.