Dielectric Resonators

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DIELECTRIC RESONATORS MDR24 SERIES – Ultra High Q Temperature Stable Dielectric Resonators - TE Mode INTRODUCTION MDR24 Series is a specially formulated dielectric material that exhibits Ultra High Q at frequencies between 1.5 and 18 GHz with Qf > 300,000 at 10 GHz. Dielectric Constant is 24 with very tight tolerance. It is ideally suited for high frequency applications where extreme low loss and excellent temperature stability is required. MDR24 Series resonators are available in both disk and cylinder type with or with supports to minimize losses. We recommend alumina and forsterite supports to maintain high Qu factor. Material Characteristics Dielectric Constant ------------------------------------------------------------------------- 24 ± 1 (+/-0.5 Special) o Temperature Coefficient of Resonant Frequency ( τƒ) (ppm/ C) ---------------- 1 to 3 ± 1 Qf (1/tan δ x frequency in GHz) ---------------------------------------------------------- >300,000 @ 10 GHz Thermal Expansion (ppm/ oC) (20 oC) ---------------------------------------------------- >10 Thermal Conductivity (cal/cm-sec oC) @ 25 oC ---------------------------------------- ~ 0.006 Specific Heat (Cal/g oC) -------------------------------------------------------------------- 0.07 Density (g/cc) -------------------------------------------------------------------------------- 7.5 Composition --------------------------------------------------------------------------------- Tantalum Based Color ------------------------------------------------------------------------------------------- Yellow APPLICATIONS FEATURES • Dielectric Resonator Oscillator (DRO) • Very Tight Dielectric Constant Tolerance • Multi-pole Filters • Ultra-High Quality Factor (Q) • Satellite Communication Equipment • High Frequency and Temperature Stability • Direct Broadcast System (DBS) • Linear τƒ • Fixed and Auto-tuned Combiners • Consistent Lot-to-Lot Characteristics MCV MICROWAVE | 6349 NANCY RIDGE DRIVE, SAN DIEGO, CA 92121 | 858.450.0468 DIELECTRIC RESONATORS MDR24 SERIES – Ultra High Q Standard OD Sizes Standard OD sizes are available from .078” (2 mm) to 5.516” (140 mm) and are designed to meet applications requirements ranging from 130 MHz to 26 GHz. All resonators are available in both disc and cylinder types. Please consult the factory for your specific requirements. Alumina Support Material Characteristics Standard Alimina Support MCV Alumina Support e' 9.8 9.8 tan d 3.0 x 10 -4 1.0 x 10 -4 Density (g/cm 3) 3.75 3.9 Measuring Frequency (GHz.) 10 10 Specifications Dielectric Resonator – TE Mode MDR 24 03 S 108 40 50 MCV Dielectric Dielectric Temperature Temperature Outer Diameter Inner Diameter Height Resonator Constant Coefficient Coefficient Tolerance (x10 -1) (x10 -1) MDR 24 ± 1 02 = +3 ppm/ oC P = ± 0.5 ppm/ oC 108 = 10.8mm 40 = 4mm 50 = 5mm 24S ± 0.5 03 = +2 ppm/ oC S = ± 1.0 ppm/ oC 04 = +1 ppm/ oC N = ± 2.0 ppm/ oC MCV MICROWAVE | 6349 NANCY RIDGE DRIVE, SAN DIEGO, CA 92121 | 858.450.0468 .

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High Q Tunable Filters
High Q Tunable Filters by Fengxi Huang A thesis presented to the University of Waterloo in fulfillment of the thesis requirement for the degree of Doctor of Philosophy in Electrical and Computer Engineering Waterloo, Ontario, Canada, 2012 ©Fengxi Huang 2012 AUTHOR'S DECLARATION I hereby declare that I am the sole author of this thesis. This is a true copy of the thesis, including any required final revisions, as accepted by my examiners. I understand that my thesis may be made electronically available to the public. ii Abstract Microwave tunable filters are key components in radar, satellite, wireless, and various dynamic communication systems. Compared to a traditional filter, a tunable filter is able to dynamically pass the required signal and suppress the interference from adjacent channels. In reconfigurable systems, tunable filters are able to adapt to dynamic frequency selection and spectrum access. They can also adapt to bandwidth variations to maximize data transmission, and can minimize interferences from or to other users. Tunable filters can be also used to reduce size and cost in multi-band receivers replacing filter banks. However, the tunable filter often suffers limited application due to its relatively low Q, noticeable return loss degradation, and bandwidth changing during the filter tuning. The research objectives of this thesis are to investigate the feasibility of designing high Q tunable filters based on dielectric resonators (DR) and coaxial resonators. Various structures and tuning methods that yield relatively high unloaded Q tunable filters are explored and developed. Furthermore, the method of designing high Q tunable filters with a constant bandwidth and less degradation during the tuning process has been also investigated.
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Tailoring Dielectric Resonator Geometries for Directional Scattering and Huygens’ Metasurfaces
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Dielectric Resonator Oscillator Design and Realization at 4.25 Ghz
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High Dielectric Permittivity Materials in the Development of Resonators Suitable for Metamaterial and Passive Filter Devices at Microwave Frequencies
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