Decoupling and blocking capacitors suit RF bypassing networks

The Knowles brand Dielectric Laboratories (DLI) specialises in single layer, ceramic capacitor technology. It claims to have one of the largest in-house portfolios of dielectric materials, with custom engineered solutions also available. Circuit designers and engineers specify Bar Cap and Gap Cap for decoupling, RF bypassing and DC blocking applications.

Bar Caps are multiple decoupling/blocking capacitors configured in a single array.  They are specifically designed for MMIC circuits and RF bypassing requiring multiple capacitor applications, such as multiple decoupling or RF bypassing networks.  Due to their high Q and low inductance, these multiple capacitor array devices have become an integral circuit component, says DLI. Bar Caps can be integrated into an IC package to reduce bond wire lengths and lead to improved performance and simplified assembly. The result is reduced complexity and lower production costs, confirms DLI.  Operating at frequencies up to 30GHz they are suitable for DC blocking, RF bypassing, decoupling, and GaAs ICs. They are supplied with 100-micro inch gold metallisation, with a Ni barrier layer, for wire bonding. Standard and custom package sizes are available to provide different capacitance values.

The company also supplies Gap Caps. The series configured precision capacitors are designed for microwave applications such as DC blocking and RF bypassing where low insertion loss and high resonant frequencies are required. Gap Caps’ recessed metallisation configuration eliminates the need for wire bonding up to 100GHz and minimises the potential of shorting during epoxy or solder attachment – therefore reducing performance variations, says DLI. Capacitance values are available from 0.2 to 800pF and, operate at frequencies up to 30GHz, suitable for DC blocking, RF bypassing, filtering, tuning and coupling. Customised solutions are available alongside catalogue products, adds DLI.


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