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How to Select PCB Materials for High Frequency PCB Applications

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Popularity:71Dated :09-26-2022 10:27【big well Small

The PCB laminate materials you select for your PCB building can be critically important to the overall functionality and lifespan of your final product. When operating frequencies go into the Microwave or even Radio Frequency (RF) regions, your PCB laminate material selection will have a significant impact on the overall loss of the finished PCB after PCB assembly and final assembly. Electrical, thermal, and mechanical properties must all be considered carefully when determining the best suitable material for your high frequency PCB manufacturing.

In high frequency designs, you may find that FR4 sometimes just doesn’t to do the job at some higher frequencies. It’s obvious you select a wrong PCB material. The main concern with FR4 at high frequencies is its relatively high dielectric constant  (Dk), which is typically considered to be approximately 4.2. While, FR4 can still act as a suitable laminate material for high frequency PCBs when it comes to a hybrid construction, in which the fabrication is combined with high frequency laminate. At MADPCB, we carry a selection of materials specifically designed to maintain signal integrity in Radio Frequency and Microwave regions.

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