High-performance sapphire variable capacitors

These sapphire gigatrimmers have been selected among various types for their outstanding qualities. Our purpose is to suggest 3 types with very good performances better than other gigatrimmers and really top quality for RF and microwave applications.

Sapphire is the best material for: insulation, heat dissipation and Q in microwave performances. It is chemically completely inert with a very low moist absorption value, it is even better than alumina.

Even if is really small it is often used for high power applications.

Most important applications:

• Very high Q, about 2 - 3 times more than other gigatrimmers, they are suitable for low noise VCO and oscillators till X band (12 GHz for model CVG-Z5 27263)
• Appreciable applicable power ex. 50 W / 2 GHz tanks to the sapphire insulation and to the 500 work V (1000 V test and 1500V breaking), very good for medium power matching, they are often used on the final TX stage in 1.9 GHz mobile base radio station with 50 W
• NP0 very high thermal stability, they are suitable for trimming inside oscillators, OCXO thermostat that works at high temperatures (+70°C/+90°C)
• They are easy to mount, this kind of case is perfectly suitable for pcb mount, in fact for an easy tuning, the rotor that touches the screwdriver is directly soldered to the ground
• Very reduced size and very fine tuning resolution with multi-turn regulation
• It is suitable for military specification MIL STD 202E and C-14409