HOOFDORP, NETHERLANDS — Murata's GQM series of high-Q multilayer ceramic chip (MLCC) capacitors features low ESR and high Q at VHF, UHF and microwave frequencies.
Low ESR — 0.1 Ohms at 1 GHz for a typical 10 pF capacitor — helps reduce power consumption in mobile phones, base stations and telecommunications equipment, particularly in RF power amplifiers. The series comes with high voltage ratings up to 250 V in 0603 packaging, and up to 100 V in 0805 packaging. Further, 0805 versions rated at 250 V are under development.
The MLCCs are available with tight tolerances, which allows designers to improve matching circuits and reduce reflection loss. Capacitors under 5 pF are available with tolerances as tight as ±0.05 pF; while 5 to 9 pF parts have tolerances down to ±0.25 pF, and 10 to 20 pF parts offer tolerances as low as ±1 percent.
The GQM series' inner electrode is made of copper, which is both economical and effective when compared to palladium. The structure of the copper electrode is optimized to suppress parasitic parallel resonance, which is a key factor in realizing one of the industry's lowest ESR figures.
For further information visit www.murata.eu.