Microwave & RF PCBs
Radio frequency (RF) and microwave PCB’s are a type of PCB designed to operate on signals in the medium frequency to extremely high frequency ranges (megahertz to gigahertz). These ranges are used for communication signals in everything from mobile phones to military radars.
The materials used are advanced composites with very specific characteristics for dielectric constant (Er), loss tangent, and CTE (co-efficient of thermal expansion). These materials can be mixed in the same Stack-Up for optimal performance and economics.
The advantages of using materials with a low X, Y and Z CTE is a resulting PCB structure that will remain extremely stable in high temperature environments while operating at up to 40 GHz in analog applications, allowing for the effective placement of very fine pitch components including, in some cases, bare die-attach