07.28.22 -- Qorvo Awarded Department Of Defense Advanced RF Gallium Nitride Program

In this new Filter Basics Series, we are taking a step back to cover some background information on how filters do what they do. Regardless of the technology behind the filter, there are several key concepts that all filters share that we will dive into throughout this series. Part 5 dives into more detail on lumped element and distributed element filter construction techniques and when each option is most appropriate to use based on your application.

Whether you’re working with coaxial cables or PCB traces, long interconnects need impedance matching to ensure power transfer and prevent reflection. Most impedance matching guidelines do not explicitly mention the input impedance of an interconnect, which will determine the S-parameters (specifically return loss).

The technology in today’s world continues to move higher in frequency to solve problems and improve performance. It is these millimeter wave (mmWave) frequencies that offer hope in solving the toughest requirements in many industries such as communications and defense.