The application of frequency-selective devices operating on the base of resonance phenomena in dielectrics with high dielectric permeability is interesting from the point of view of decreasing of devices weight, sizes and cost. Among such frequency-selective elements one can note pass-band filters, low-frequency and high-frequency filters and others.
Resonatoris the key element of a filter which represent a metalizing surface in the form of disk or cylinder. Together with complete discs and cylinders the construction with coaxial hole is also produced. Such resonator represent a ceramic tube. Internal and external walls of a tube are coated by conducting films. The tube is placed in the metallic case.
- εr - dielectric permeability
- τf - Temperature coefficient of the dielectric
- Q - Quality factor
- f0 - Resonance frequency, Hz
The choise of a material with high dielectric permeability is determined by a possibility of miniature devices producing. So, the permeability in ceramic materials varies from 9 ± 0,5 to 98 ± 1. The using of ceramics in dielectric resonators allows to reach improved technical characteristics and low microwave losses.
One of the main producers of dielectric resonators on the base of high quality resonators for microwave devices is Temex-Ceramics (France). In 2012 the company has become a part of companies group Exxelia Group - one of European leaders in the filed of electronic parts for microwave devices supplying.
- miniature sizes
- high Q factor
- Temperature stability
- Easy design and comfortable using
- High reliability when operating
Coaxial ceramic resonatorts
Temex-Ceramics produces a wide range of ceramic coaxial resonators with high Q factor for the range from 300MHz to 6GHz, produced on the base of ceramics with dielectric permeability (εr) 21, 37, 90. Such resonators are recommended for using in devices of cellular network, duplexers, oscillators, GPS, narrowband filters.
Searching by characteristics
For coaxial resonators choosing one can use online Temex-Ceramics program