Vishay has launched a surface-mount thin film RF capacitor with, what is claimed to be, the highest self-resonance frequency, ranging from 8.5 to upwards of 20 GHz, depending on capacitance. This RFCS series replaces the previous generation HPC product range.
The devices have a Q of 260 - 70,500 at 100 MHz, and 10 - 3190 at 1 GHz. The capacitors are rated for a working voltage of up to 50 and feature a capacitance range of 0.2 - 27 pF with a tolerance of ± 5%.
With a thin film capacitor-on-silicon construction, the series is designed for RF circuits that require good performance at frequencies up to 20 GHz. The structure is based on thin film electrodes deposited on a highly conductive silicon substrate characterised by ultra-low parasitic inductance which allows the component to self-resonate at higher frequencies.
The capacitors are suitable for impedance matching circuits, decoupling, DC blocking, lumped element filters and other circuit applications requiring ultra-thin components such as smart credit cards and SIM cards. Typical end-products in which the device will be used include test and measurement equipment, RF receivers and transmitters, high-frequency data transfer (telecom, datacom, etc,) and other applications with operating frequencies greater than 5 GHz.
