Series 2150: Temperature-Stable Dielectric Resonators
Series 2900: Temperature-Stable Resonators
Series 3500: Temperature-Stable Resonators
Series 4300: Temperature-Stable Dielectric Resonators
Series 7300: Temperature-Stable Dielectric Material
Series 8300: Temperature-Stable Resonators
Series 8700: Temperature-Stable Resonators
Dielectric resonators and components are vital in myriad functions and devices. Trans-Tech offers a range of proprietary ceramic materials, specifically designed to provide exceptional solutions in terms of size, Q-factor, temperature stability, and cost. These dielectric resonator materials are custom-blended and sized to suit individual filter or oscillator designs. For less demanding applications, such as impedance matching or tuning, application-specific ceramic materials can be provided in custom shapes like bars, substrates, or powders for dispersion into polymers.
Our extensive range of ceramic materials caters to a broad spectrum of applications, including patch antenna substrates, matching structures for circulators and isolators, and miscellaneous support structures. These materials are not characterized for resonator applications but are designed for bulk, miscellaneous shapes, or substrates. The temperature-dependent coefficients of dielectric constant and linear expansion are provided as these applications are non-resonant.
The Magnesium Aluminum Titanate (MAT) and Magnesium Calcium Titanate (MCT) series are easier to machine than most microwave ceramics, making them more suitable for applications that require precision machining.
D-4, or Corderite, is a ceramic known for low-temperature coefficient of expansion, which is comparable to the metal alloy Invar. Although it is not suitable for substrates, it is occasionally used for dielectric resonator supports due to its low dielectric constant and low thermal expansion rate.
Trans-Tech also has a number of temperature-stable dielectrics available. For more information, please contact us.
Frequently Asked Questions
The right material depends on your frequency, Q requirements, temperature stability needs, and size constraints. That’s why Trans-Tech offers a broad portfolio and works with your engineering team to select or custom-blend the formulation that fits your specific design.
Dielectric constant is typically measured using a resonant cavity or a parallel plate method at the frequency of interest. For dielectric resonators, Trans-Tech uses network analyzers to characterize the resonant frequency, from which the dielectric constant is calculated using the known geometry. We perform this measurement as part of our standard production testing.
Dielectric properties and magnetic resonance are related but distinct phenomena. In ferrite materials that have both magnetic and dielectric properties, changes in dielectric constant do affect the overall electromagnetic behavior of the device. However, dielectric constant is typically characterized using RF/microwave measurement techniques rather than magnetic resonance methods.
Our standard portfolio spans dielectric constants from approximately 10 to 125+. Within that range, we offer multiple material families optimized for different combinations of Q-factor, temperature stability, and machinability. Custom formulations outside our standard range can be developed through our R&D lab.