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Electrical engineering, Electronics
– Telecommunications
ELECTRICAL ENGINEERING, ELECTRONICS // KILN AND FURNACE ENGINEERING// ON- AND OFFSHORE ENGINEERING // POWER ELECTRONICS // MEASURING SYSTEMS // CONTROL SYSTEMS // WAFER PRODUCTION // ELECTRIC MOTORS // TELECOMMUNICATIONS // LIGHTING SYSTEMS // PHYSICAL RESEARCH // ELECTRONICS – GENERAL
The use of components made of high-grade ceramics for transmission and receiver systems essentially requires appropriate dielectric properties from the materials.
One type of material suitable in principle as a dielectric resonator is high-purity, low-alkali, dense-sintered Al2O3 ceramic, as on account of the following properties it can be used as a frequency filter for a narrow transmission range:
- Purity: ≥ 99,5 %
- Elements of the 1st main group: < 100 ppm
- Density: > 98 % of the theoretical value
- Dielectric constant: 9.5
- Dielectric loss angle: frequency-dependent 10-3 to 10-4
- Quality factor: > 10 000
- High geometric and topographic precision
