How to Specify and Select RF Filters

RF filters are critical components in aerospace and defense electronic systems. In high-frequency transmissions, they channel desired signals and reject unwanted signals, enabling reliable signal processing across the RF, microwave, and millimeter wave (mmWave) electromagnetic spectrum. In operating environments with many such signals, including from jammers trying to disrupt the operation of some systems, RF filters are employed in progressively higher frequencies. At the same time, systems engineers are requesting smaller filters that fit within drop-in surface mount technology (SMT) packages mounted within compact printed circuit board (PCB) assemblies.