WCI’s single sheet (SS) ceramic capacitors chips are intended for hybrid applications from direct current through GHz frequencies. Their dual plate construction and low profile make them ideally suited for microwave stripline applications. They display ultra-low series resistance and inductance with high series resonance frequencies. (See graph) WCI’s SS capacitors use the finest ceramic and electrode materials resulting in a high quality, stable, hermetic device which is unaffected by static discharges.

Terminations are high quality vapor deposited gold, suitable for thermo compres­sion or ultrasonic wire bonding, soldering, or epoxy mounting. Pd Ag terminations are also available.

Microwave capacitors are available in all three dielectric classes, as well as temperature compensating dielectrics. This fact, coupled with variation in geometries, make a wide range of capacitance values available through 50,000pF in an area as small as one-quarter inch square.

At microwave frequencies, the physical dimensions of the chip should be equal to the stripline width for greatest efficiency. To accomplish this, configurations can be square or rectangular - as long as the total area is sufficient for the capacitance desired.
(See figure 2)

Axial-beam leaded, leaded and coated, circular discs, cap arrays and tight tolerances are also available. Standard disc sizes are 0.45”, .050”, .060”, .080” and .120” O.D. (all =/-.005”). High voltage single layer (SL’s) up to 20KV are also available. Please consult the factory for any special requirements.