Dielectric resonators raise your high-Q

Fiedziuszko, S.J.; Holmes, Steven J.

doi:10.1109/6668.951549

Cited by 70 publications

(20 citation statements)

References 30 publications

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“…In Figure 7b, it can be seen that the dielectric constant for Ta-LTO crystals are almost independent of frequency and temperature in the low-temperature range from 0-150 °C. This behavior indicates that Ta-LTO shows an intrinsic dielectric response resulting from the electronic and/or ionic polarization in the low-temperature range [29,30]. The dielectric constant plateau of Ta-LTO shows a value of ~68 as Figure 7b, which is higher than the dielectric constant of LTO as shown in Figure 7a, so Ta doping can improve the dielectric properties of LTO.…”

Section: Resultsmentioning

confidence: 90%

Growth and Dielectric Properties of Ta-Doped La2Ti2O7 Single Crystals

Wang

et al. 2018

Crystals

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High-quality Ta-doped La 2 Ti 2 O 7 (Ta-LTO) single crystal of about 40 mm in length and 5 mm in diameter was successfully prepared by the optical floating zone method. An X-ray rocking curve reveals that the crystal of LTO has excellent crystalline quality. As-grown crystals were transparent after annealing in air and the transmittance is up to 76% in the visible and near-infrared region. X-ray diffraction showed that this compound possessed a monoclinic structure with P2 1 space group. The dielectric properties were investigated as functions of temperature (0~300 • C) and frequency (10 2 Hz~10 5 Hz). Dielectric spectra indicated an increase in the room-temperature dielectric constant accompanied by a drop in the loss tangent as a result of the Ta doping. One relaxation was observed in the spectra of electric modulus, which was ascribed to be related to the oxygen vacancy. The dielectric relaxation with activation energy of 1.16 eV is found to be the polaron hopping caused by the oxygen vacancies.

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Section: Resultsmentioning

confidence: 90%

Growth and Dielectric Properties of Ta-Doped La2Ti2O7 Single Crystals

Wang

et al. 2018

Crystals

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“…3 can be realized by quite various kinds of structures. For example, with waveguide cavity resonators [1] [9], with comb-line/interdigital coaxial-line resonators [1][10], with dual-mode dielectric resonators [7], and so on. In this paper, as a trial manufacture, TE018-mode dielectric resonators [6] [7] have been employed to realize an 180-degree directional coupler at Ku-band.…”

Section: Circuit Topologies Of Bandpass Directional Couplersmentioning

confidence: 99%

Bandpass Directional Couplers with Electromagnetically-Coupled Resonators

Uchida

Yoneda

Konishi

et al. 2006

2006 IEEE MTT-S International Microwave Symposium Digest

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Compact 90-and 180-degree directional couplers incorporating bandpass characteristics are presented. They can integrate a bandpass filter and a power-divider/combiner in an RF transceiver, resulting in its miniaturization. The bandpass directional coupler can be represented as a coupled-resonator network, and its coupling coefficients and external-Q can be determined from a desired coupling ratio and operational bandwidth of the bandpass coupler. Measured results are also presented on a Ku-band bandpass 180-degree directional coupler with TE018-mode dielectric resonators.

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“…Due to high material dielectric loss and low temperature stability the dielectric resonator remained no more than an intellectual curiosity for the next few decades [2]. This changed in the 1980's when new ceramic technology provided low-loss and temperature stable materials for dielectric resonators [3]. A commercially successful example of such a highly stable ceramic, zirconium-tin-titanate, (Zr-Sn)T iO 4 is used in this study.…”

Section: Introductionmentioning

confidence: 98%

A parallel plate dielectric resonator as a wireless passive strain sensor

Aftab

Yousaf

Hoppe

et al. 2015

2015 IEEE Sensors Applications Symposium (SAS)

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This paper presents a wireless passive strain sensing concept that functions by detuning a dielectric resonator. It is shown how a high Q resonator functions as a wireless passive sensor when correctly matched with an antenna. Finite element and analytical models are compared with experimental data and the sensor cross sensitivity with respect to temperature and humidity are also explored. The sensitivity of the resonance frequency to the strain, temperature and humidity is measured to be 51.6 ppm/µm, 10.09 ppm/K and -0.65 ppm/% respectively.

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Dielectric resonators raise your high-Q

Cited by 70 publications

References 30 publications

Growth and Dielectric Properties of Ta-Doped La2Ti2O7 Single Crystals

Growth and Dielectric Properties of Ta-Doped La2Ti2O7 Single Crystals

Bandpass Directional Couplers with Electromagnetically-Coupled Resonators

A parallel plate dielectric resonator as a wireless passive strain sensor

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