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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.
Comparison chart among the best microwave materials | ||||
Sapphire | Alumina AL2O2 | Quartz SiO2 | Pure Teflon | |
Dielectric constant εr | about 11 | about 10 | about 3.8 | about 2,05 |
dissipation factor tanδ @ 10GHz | < 0,0001 | 0,0002 | 0.0015 | 0.0003 |
Thermal stability | good | good | good | poor |
Mechanical performance | good | good | good | poor |
Thermal dissipation | very good | good | average | poor |
Most important applications:
Order code: | CVG-Z5 |
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Sapphire variable capacitor, 0.3 - 1.2 pF, 500V Temex AT27263 |
Conditions: | N (The product is brand new) |
Min. capacitance: | 0.3 pF |
Max. capacitance: | 1.2 pF |
Rated voltage: | 500 V |
Q @ Freq.: | > 5000 @ 250 MHz |
Orientation: | vertical |
Mounting: | SMD |