High-Q dielectric resonator devices at cryogenic temperatures

Klein, N.; Schornstein, S.; Ghosh, I.S.; Schemion, D.; Winter, Michael; Zuccaro, C.

doi:10.1109/77.783802

Cited by 15 publications

(4 citation statements)

References 15 publications

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“…Given the two preceding approximations, theoretical and empirical expressions for single-pass power transmission, (11) and (12) and (13), respectively, combine to yield 20log 10 |r | ∼ = T dB0 (14) α eff ∼ = dα eff0 d f f + 1 2 where Table III is not entirely attributable to the propagation loss within the cavity.…”

Section: E Reflection and Propagation Lossmentioning

confidence: 99%

Millimeter-Wave Dielectric Properties of Highly Refractive Single Crystals Characterized by Waveguide Cavity Resonance

Schermer

Stievater

2019

IEEE Trans. Microwave Theory Techn.

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This paper reports precision measurements of the electromagnetic permittivity of five highly refractive, singlecrystal materials, SrTiO 3 , KTaO 3 , rutile TiO 2 , LiTaO 3 , and LiNbO 3 , using a single, well-controlled, frequency-scalable procedure over the frequency ranges 25-110 and 140-220 GHz. Real permittivity values were highly consistent for different samples measured across multiple frequency bands. For SrTiO 3 , KTaO 3 , and TiO 2 , real permittivities were more consistent with lower frequency values than typically reported in the millimeterwave region of the spectrum. Real permittivities of LiTaO 3 and LiNbO 3 agreed with most reported data. The intrinsic dielectric loss of SrTiO 3 , KTaO 3 , and the extraordinary axis of rutile TiO 2 was also characterized over the ranges 25-110 and 140-220 GHz, and intrinsic loss per unit frequency was found to be consistent with values measured at other frequencies by dielectric resonators and quasi-optical techniques.

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Section: E Reflection and Propagation Lossmentioning

confidence: 99%

Millimeter-Wave Dielectric Properties of Highly Refractive Single Crystals Characterized by Waveguide Cavity Resonance

Schermer

Stievater

2019

IEEE Trans. Microwave Theory Techn.

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“…Rutile is challenging because of its very high permittivity of above 100 and its relatively low loss tangent at cryogenic temperatures. The permittivity is strongly anisotropic (Klein et al 1995, Tobar et al 1998 and exhibits an extremely large negative temperature coefficient ∂ε r /∂T = −1000 ppm K −1 at T = 77 K. Therefore, TiO 2 is not very useful as a dielectric resonator material on its own, but it can be combined with other dielectrics like sapphire in order to provide a turning point in the temperature dependence of the resonance frequency (see section 4). Sintered titania exhibits loss tangent values of 1.5 × 10 −5 at 77 K and 10 GHz; the temperature coefficient is similar to rutile (Alford 1998).…”

Section: Single Crystal Dielectrics and Microwave Ceramics At Cryogen...mentioning

confidence: 99%

Cryogenic dielectric resonators for future microwave communication systems

Klein¹,

Winter²,

Yi³

2000

Supercond. Sci. Technol.

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Recent progress in manufacturing dielectric ceramics and single crystals with high dielectric constant and low microwave losses has turned out to be a challenge for the development of novel devices for satellite communication. From this development device performance is expected to benefit for possible device operation temperatures ranging from cryogenic temperatures around 50-150 K (achievable with one-stage closed cycle refrigerators) over temperatures from 150 to 200 K (in principal achievable with radiation cooling) towards room temperature, if novel dielectric resonator structures with lower loss contribution of the metallic housing became available.

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“…High-T c superconducting (HTS) materials exhibit many unique properties, making them attractive to be used for a wide range of microwave applications. Notably, HTS thin films were immediately used in microwave applications in the development of passive components, such as resonators, filters, multiplexers, circulators, power splitters, delay lines and switches [1][2][3][4][5] due to their extremely low surface resistances at microwave frequencies. In addition, due to nonlinear superconducting quantum tunnelling effects, superconducting applications in HTS active microwave circuits such as detectors, mixers, parametric amplifiers, and oscillators were developed [4].…”

Section: Introductionmentioning

confidence: 99%

“…Further, HTS thin films find applications in patterning of low-loss and small-volume HTS microstrip lines replacing low-loss bulky waveguides [4]. However, because of their limited power-handling capability their use is limited as their performance deteriorates with increased input RF power 3 Author to whom any correspondence should be addressed. levels.…”

Section: Introductionmentioning

confidence: 99%

Efficient analysis for nonlinear microwave characteristics of high-power HTS thin film microstrip resonators

Kedar

Kataria

2005

Supercond. Sci. Technol.

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This paper investigates the nonlinear effects of high-Tc superconducting (HTS) thin film in high-power applications. A nonlinear model for complex surface impedance has been proposed for the efficient analysis of the nonlinearity of HTS thin films. Further, using the developed model, analysis of HTS-MSR has been done using the spectral domain method (SDM). The SDM formulation has been modified to account for finite conductivity and thickness of HTS films by incorporating a complex resistive boundary condition. The results have been validated with the experiments performed with microstrip resonators (MSRs) based on YBa2Cu3O7−x (YBCO) thin films made by a laser ablation technique on LaAlO3 substrates, characterized for their characteristics, namely, resonant frequency and quality factor measured as a function of temperature and input RF power. A close agreement between the theoretical and measured results has been achieved validating the analysis.

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High-Q dielectric resonator devices at cryogenic temperatures

Cited by 15 publications

References 15 publications

Millimeter-Wave Dielectric Properties of Highly Refractive Single Crystals Characterized by Waveguide Cavity Resonance

Millimeter-Wave Dielectric Properties of Highly Refractive Single Crystals Characterized by Waveguide Cavity Resonance

Cryogenic dielectric resonators for future microwave communication systems

Efficient analysis for nonlinear microwave characteristics of high-power HTS thin film microstrip resonators

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