1996 - 2016
BSEE - KB3UON
RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling 2 MB. Its primary purpose was to provide me with ready access to commonly needed formulas and reference material while performing my work as an RF system and circuit design engineer. The Internet was still largely an unknown entity at the time and not much was available in the form of WYSIWYG ...
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August 15, 2015 -- AFM Microelectronics has just published an application note titled "MLCC (Multi-Layer Ceramic Capacitor) Resonances and SPICE MLCC Models" that advises how to develop a simulation model that will accurately represent the component's behavior under real-life conditions. The process involves making measurements on a carefully calibrated vector network analyzer (VNA), with a caveat about the instrument's ability to adequately (or inadequately) determine some parameters, such as Rs (series resistance) because the VNA's value often is on the same order as the DUT (device under test).
If you need highly accurate software models that will predict the effects of loss and self-resonance of passive devices, then this paper is well worth your time to read since its fundamental principles apply to capacitors, inductors, and resistors.
About AFM Microelectronics
AFM designs, develops, manufactures and markets RF/microwave Multilayer Capacitors, High Power High current Multilayer Capacitors, High Temperature High Voltage Multilayer Capacitors, GBBL(Grain Boundary Barrier Layer) High K substrates for Single Layer Capacitors, Ultra Low Fire Dielectric powder for multilayer capacitors. Capacitors produced range in size from 0505 to 13560, with operating voltages from 25 volts to 50,000 volts. The AFM capacitors find wide use in the wireless communications infrastructure, fiber optic, medical electronics, and semiconductor manufacturing equipment, defense, aerospace, and satellite communications markets.
Posted August 16, 2015