Conductivity measurements at the interface between the sintered conductor and dielectric substrate at microwave frequencies

Nakayama, Akira; Terashi, Yuichiro; Uchimura, Hiroshi; Fukuura, A.

doi:10.1109/tmtt.2002.800382

Cited by 19 publications

(8 citation statements)

References 8 publications

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“…The confinement of the radiation is now guaranteed by a propagation constant mainly directed along the axis of the resonator. The factor Q~ of this "extended" NRDR mode is accordingly t¡ times higher in comparison to the m = 1 mode of the shorter structure, as recently verified by Nakayama and coworkers [27]. The corresponding field intensities are otherwise equal in the two structures.…”

Section: Beyond the Nonradiative Designsupporting

confidence: 73%

A nonradiative approach to single-mode dielectric resonators

et al. 2003

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The development of a single-mode dielectric resonator specifically designed for high-frequency paramagnetic resonance applications is discussed. The use of dielectric resonators is expected to give better performances in comparison to metallic cavities, as well established at low frequency. The relatively low dielectric constant of the common good-quality materials at high frequency requires the presence of a metallic shielding in order to obtain ah efficient single-mode operation. The configuration proposed in this paper concems a partially open structure in which the confinement of the radiation is guaranteed by the forbidden propagation around the dielectric region. By this way a single-mode resonator can be obtained for arbitrary values of the employed dielectrie constant. The complex resonance frequencies and the field distributions of the proposed nonradiative device are obtained in terms of the complex permittivity of the resonator and of the finite conductivity of the employed conductors. The actual field distribution and intensity can then be obtained even in the presence of a lossy sample. An efficient excitation scheme, fully compatible with the common electron paramagnetic resonance setups, has been developed exploiting the nonradiative nature of the proposed device. Preliminary measurements around 90 and 186 GHz have been then successfully realized. Finally, the specific benefits of the proposed resonator have been discussed and compared with the performances of a conventional metallic cavity.

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Section: Beyond the Nonradiative Designsupporting

confidence: 73%

A nonradiative approach to single-mode dielectric resonators

et al. 2003

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“…For an evaluation of the fabrication process and material and estimates of the antenna gain, the conductivity must be properly evaluated and much research on conductivity measurements has been conducted. Measurement methods of the conductivity are categorized into transmission line methods [10]- [12] and resonator methods [13]- [19]. The transmission line methods use transmission lines with different lengths and calculate attenuation constants based on the transmission characteristics.…”

Section: Introductionmentioning

confidence: 99%

“…The resonator methods enable measurements of the conductivity by measuring the resonance characteristics. Various shapes of resonators have been used: rectangular cavities [13]- [15], circular cavities [16], [17], and circular dielectric resonators [18], [19]. The method can measure the conductivity This work is licensed under a Creative Commons Attribution 4.0 License.…”

Section: Introductionmentioning

confidence: 99%

Anisotropic Conductivity Measurements by Two Kinds of Multimode Rectangular Plate-Laminated Cavities

Tomura

Hirokawa

2021

IEEE Trans. Microwave Theory Techn.

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In this article, we present anisotropic conductivity measurements by using two kinds of multimode rectangular cavities. Plate-laminated waveguides are fabricated by diffusion bonding of etched thin metal plates and their sidewalls have anisotropic conductivity characteristics. The anisotropic conductivity is measured by two multimode rectangular cavities when polarization is vertical or horizontal to the lamination direction. Transmission characteristics of the cavities are measured and the conductivity is calculated by the measured resonant frequencies and unloaded quality factors. The anisotropic conductivities are derived by solving a linear equation. As an example, aluminum alloy (A6063) E-band (60.5-91.9 GHz) rectangular cavities are fabricated and the conductivity is characterized.

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“…Recently multilayered ceramic layers moved towards thinner layer thickness (below 100 ppm) which permits small via diameter (below 100 p). In parallel, metal line conductivity improved by using copper alloy so that electrical attenuation is reduced [2].…”

Section: Introductionmentioning

confidence: 99%

“…Although, the roughness [5] of the metal conductors is not included in the model, roughness accounts for a conductivity drop with frequency (see [2] relating to Tanaka ef d). It is expressed in formula (3) …”

Section: Introductionmentioning

confidence: 99%

High performance multilayered high temperature cofired ceramic for wide band packaging

Tavernier

Valentin

Mazouz³

et al.

IEEE MTT-S International Microwave Symposium Digest, 2003

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Opto-electronic and wireless packages have to meet stringent technical performance and cost. Traditionally glass sealed metal machined packages respond to the demand. In 2003, with ever growing complexity, new technology now offers advantageous solutions. While keeping high hermiticity, low mechanical tolerance and electromagnetic compatibility, multilayered ceramic offers a superior flexibility at a lower cost. The present article provides insight on High Temperature Cotired Ceramic (HTCC) achievable electrical performance in the DC to 40 GHz range bawd on FEM modeling with Ansoft HFSS. We compare model and experimental results for ring and cavity rmonators with quality factor up to 180. Based on the model we then derive wide band asymmetrical stripline and vertical interconnect.Index terms -HTCC, wide band ceramic package, HFSS modeling, ring resonator, cavity resonator, EBG structure, asymmetric stripline, vertical interconnect.

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Conductivity measurements at the interface between the sintered conductor and dielectric substrate at microwave frequencies

Cited by 19 publications

References 8 publications

A nonradiative approach to single-mode dielectric resonators

A nonradiative approach to single-mode dielectric resonators

Anisotropic Conductivity Measurements by Two Kinds of Multimode Rectangular Plate-Laminated Cavities

High performance multilayered high temperature cofired ceramic for wide band packaging

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