Surface-mount devices (SMDs) have gained in popularity over the last decades. Surface-mount technology has been successfully used in many communication and RF sensing/control systems. For instance, the low-noise block for the satellite broadcasting is widely used in households in a frequency band of 10-12 GHz. However, the higher the operating frequency that is used, the higher the accuracy of the SMD models is required.

Simple models based on the equivalent circuits may fail because of interaction between the SMD body and the layout where the SMD is placed. In principle, such an interaction can’t be omitted and therefore the SMD models usually provided by vendors are valid just in the layout where the model was extracted from. Any change of the footprint, substrate thickness or permittivity might cause that the model to become invalid. Electromagnetic field simulation can be successfully used to correct such effects with a reasonable effort providing enhanced accuracy of the SMD models.

With this eSeminar, learn about:

• A technique for an extraction of the SMD models from measured S-parameters in a given test-fixture using CST Studio Suite®. The concept will be demonstrated with an example of a SMD low-pass filter.

Watch the eSeminar: