High-Frequency, High-Q Capacitors

The high-frequency communications infrastructure market is continuously expanding. The downsizing trends for circuit-module designs have increased the requirements for lower profiles and power consumption. Murata has the solution to meet these demands by offering three series of RoHS-compliant capacitors with C0G characteristics: the GJM, GQM, and ERB series.

GJM-Series: The Murata GJM-series is a high-Q, ultra-small capacitor series for high-frequency applications in the 500 MHz to 10 GHz range, suitable for VCO and PA module applications. The GJM-series is made with copper electrodes as a cost-effective solution for low ESR and power consumption due to the high-Q (low loss) performance. A variety of tight-tolerance versions are available, offered in EIA sizes of 0201 and 0402 with a capacitance range of 0.2 pF to 20 pF.

GQM-Series: A copper-based internal electrode makes the GQM-series highly resistant to frequency, which can be used from 500 MHz to 10 GHz. The copper electrodes allow for ultra-low ESR, high-Q in the GHz frequencies, and high RF current-handling capability. This series is the best choice for high-performance, high-power RF designs requiring voltages up to 250 V_DC. A variety of tight-tolerance versions are available, offered in EIA sizes of 0603 and 0805 with a capacitance range of 0.1 pF to 100 pF.

ERB-Series: Exhibiting a capacitance range of 0.5 pF to 1,000 pF, the ERB-series of capacitors comes with higher Q and lower ESR which is better than the standard products of equivalent packages. For high-performance, medium-power RF designs, this series offers low ESR in the 1 MHz to 1 GHz frequency range. The temperature stability of the C0G dielectrics ensures low power dissipation. The ERB-series is designed with precious metal inner electrodes. These surface-mount capacitors are available in voltages up to 500 V_DC in a 1210 EIA size