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Journal articles on the topic 'Ceramic substrates of high permittivity'

Author: Grafiati

Published: 4 June 2021

Last updated: 4 February 2022

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1

Szwagierczak, Dorota, Beata Synkiewicz-Musialska, Jan Kulawik, and Norbert Pałka. "Sintering, Microstructure, and Dielectric Properties of Copper Borates for High Frequency LTCC Applications." Materials 14, no. 14 (2021): 4017. http://dx.doi.org/10.3390/ma14144017.

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New ceramic materials based on two copper borates, CuB2O4 and Cu3B2O6, were prepared via solid state synthesis and sintering, and characterized as promising candidates for low dielectric permittivity substrates for very high frequency circuits. The sintering behavior, composition, microstructure, and dielectric properties of the ceramics were investigated using a heating microscope, X-ray diffractometry, scanning electron microscopy, energy dispersive spectroscopy, and terahertz time domain spectroscopy. The studies revealed a low dielectric permittivity of 5.1–6.7 and low dielectric loss in t

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2

Le Coq, Michel, Eric Rius, Jean-Francois Favennec, et al. "Miniaturized C-Band SIW Filters Using High-Permittivity Ceramic Substrates." IEEE Transactions on Components, Packaging and Manufacturing Technology 5, no. 5 (2015): 620–26. http://dx.doi.org/10.1109/tcpmt.2015.2422613.

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3

Freitas, Antonio E., Taise M. Manhabosco, Ronaldo J. C. Batista, et al. "Development and Characterization of Titanium Dioxide Ceramic Substrates with High Dielectric Permittivities." Materials 13, no. 2 (2020): 386. http://dx.doi.org/10.3390/ma13020386.

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Titanium dioxide substrates have been synthesized by means of solid-state reactions with sintering temperatures varying from 1150 °C up to 1350 °C. X-ray diffraction and scanning electron microscopy (SEM) where employed to investigate the crystal structure, grain size and porosity of the resulting samples. The obtained ceramics are tetragonal (rutile phase) with average grain sizes varying from 2.94 µm up to 5.81 µm. The average grain size of samples increases with increasing temperature, while the porosity decreases. The effect of microstructure on the dielectric properties has been also stud

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4

Zakharov, A. V. "Stripline combline filters on substrates designed on high-permittivity ceramic materials." Journal of Communications Technology and Electronics 58, no. 3 (2013): 265–72. http://dx.doi.org/10.1134/s1064226913030145.

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5

Xiong, Zhao Xian, X. Xue, Hong Qiu, et al. "Microwave Dielectric Ceramics and Devices for Wireless Technologies." Key Engineering Materials 368-372 (February 2008): 154–58. http://dx.doi.org/10.4028/www.scientific.net/kem.368-372.154.

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In this paper, several kinds of synthesis techniques were adopted; not only conventional solidstate reaction method but also solution synthesis techniques, including co-precipitation and hydrothermal synthesis, in addition to the gel-casting for complex shape of ceramic components and tape-casting of large scale thin plate for microwave IC. Different kinds of microwave ceramics were prepared, such as materials with low permittivity and high quality factor, moderate permittivity and good quality factor, and, high permittivity and reasonable quality factor, in addition to near zero of temperatur

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6

Babar, A. A., V. A. Bhagavati, L. Ukkonen, A. Z. Elsherbeni, P. Kallio, and L. Sydänheimo. "Performance of High-Permittivity Ceramic-Polymer Composite as a Substrate for UHF RFID Tag Antennas." International Journal of Antennas and Propagation 2012 (2012): 1–8. http://dx.doi.org/10.1155/2012/905409.

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A high-permittivity ceramic-polymer composite substrate is fabricated and proposed for its potential use in UHF RFID tags. The substrate is developed using high-permittivity Barium Titanate (BaTiO3) ceramic powder mixed with polydimethylsiloxane (PDMS) polymer. The resulting composite achieves a soft, hydrophobic, heat resistant, low loss, and flexible material with high dielectric constant. The percentage of the ceramic powder in the composite helps in achieving variable permittivity values. When this material is used as a substrate for a tag antenna, it will help the tag to be reduced in siz

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Engin, A. Ege, and Pavithra Pasunoori. "Automated Complex Permittivity Characterization of Ceramic Substrates Considering Surface-Roughness Loss." Additional Conferences (Device Packaging, HiTEC, HiTEN, and CICMT) 2012, CICMT (2012): 000613–20. http://dx.doi.org/10.4071/cicmt-2012-tha34.

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This paper presents a new method to extract the frequency-dependent dielectric constant and loss tangent of ceramic substrates from high frequency measurements of cavity resonators. A cavity resonator can simply be realized using two ground planes connected with vias to form the side walls. Recently, a rapid plane solver has been developed to efficiently and accurately simulate cavity resonators and extract materials properties by manually fitting simulations to measurements. In this paper, we will demonstrate how the fitting process can be automated. In order to extract the dielectric constan

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Engin, A. Ege, and Pavithra Pasunoori. "Automated Complex Permittivity Characterization of Ceramic Substrates Considering Surface-Roughness Loss." Journal of Microelectronics and Electronic Packaging 9, no. 3 (2012): 144–48. http://dx.doi.org/10.4071/imaps.339.

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This paper presents a new method to extract the frequency-dependent dielectric constant and loss tangent of ceramic substrates from high frequency measurements of cavity resonators. A cavity resonator can be realized using two ground planes connected with vias to form the side walls. Recently, a rapid plane solver has been developed to efficiently and accurately simulate cavity resonators and extract materials properties by manually fitting simulations to measurements. In this paper, we demonstrate how the fitting process can be automated. In order to extract the dielectric constant and loss t

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9

Huang, Cheng-Liang, Jun-Jie Wang, and Yu-Pin Chang. "Using high permittivity ceramic substrates to design a bandpass filter with open stub." Microwave and Optical Technology Letters 49, no. 4 (2007): 771–73. http://dx.doi.org/10.1002/mop.22252.

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10

Milosavljevic, Zlatoljub D. "Miniature Ceramic Antennas for Wireless Applications." Advances in Science and Technology 67 (October 2010): 1–9. http://dx.doi.org/10.4028/www.scientific.net/ast.67.1.

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This paper explores the use of high-permittivity ceramic substrates in producing novel miniature ceramic chip antenna designs. Single- and dual-band antennas for non-cellular applications have been presented. Another aspect presented in the paper is creating a compact switchable ceramic chip antenna for cellular application. The measured results of all antennas are given. It is shown that presented antenna structures have very good impedance and radiation properties, features that are of interest in many mobile applications.

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11

Mandeep, J. S., N. K. Loke, S. I. S. Hassan, M. F. Ain, S. Sreekantan, and K. Y. Cheong. "Investigation of Microwave Properties of High Permittivity Ceramic Substrate." Journal of Electromagnetic Waves and Applications 22, no. 14-15 (2008): 1873–82. http://dx.doi.org/10.1163/156939308787537955.

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12

Zhao, Xin, K. Jagannadham, Wuttichai Reainthippayasakul, Michael T. Lanagan, and Douglas C. Hopkins. "Thermal and Electrical Characterizations of Ultra-Thin Flexible 3YSZ Ceramic for Electronic Packaging Applications." International Symposium on Microelectronics 2016, no. 1 (2016): 000391–96. http://dx.doi.org/10.4071/isom-2016-tha13.

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Abstract This paper presents thermal and electrical characterizations of an ultra-thin flexible 3YSZ (3 mol% Yttria Stabilized Zirconia) ceramic substrate to explore its potential for electronic packaging applications. The thicknesses of the ultra-thin 3YSZ substrates were 20 μm and 40 μm. The flexible thin ceramic substrate can provide not only better modulus for higher robustness in manufacturing, especially in Z-axis direction of modules, but also low thermal resistance for high density 2D (two dimensional) / 3D (three dimensional) power module packaging applications. To better understand t

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13

Huang, Cheng-Liang, Jun-Jie Wang, and Po-Hsin Li. "Using high permittivity ceramic substrates to fabricate a miniaturized bandpass filter with capacitive load." Microwave and Optical Technology Letters 49, no. 7 (2007): 1609–13. http://dx.doi.org/10.1002/mop.22533.

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14

Castro, Juan, Eduardo Rojas, Thomas Weller, and Jing Wang. "Engineered Nanocomposites for Additive Manufacturing of Microwave Electronics." International Symposium on Microelectronics 2015, no. 1 (2015): 000189–96. http://dx.doi.org/10.4071/isom-2015-wa12.

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Four types of high-permittivity and low-loss composite substrates based on a Polydimethylsiloxane (PDMS) elastomer host matrix, and Cyclo-Olefin Polymer (COP) reinforced by Ba0.55Sr0.45TiO3 and MgCaTiO2 micro-fillers, with volume loading concentration up to 49%, have been prepared and characterized up to 20 GHz using cavity resonators. The high-k ceramic powders were sintered at temperatures up to 1500°C to further enhance the dielectric properties. The 49% loaded PDMS-Ba0.55Sr0.45TiO3 composites with 1340°C sintered fillers have shown a relative permittivity ɛr of ~23.51 and loss tangent tanδ

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15

Palmqvist, Lisa, Karin Lindqvist, and Chris Shaw. "Porous Multilayer PZT Materials Made by Aqueous Tape Casting." Key Engineering Materials 333 (March 2007): 215–18. http://dx.doi.org/10.4028/www.scientific.net/kem.333.215.

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Porous piezoelectric ceramics are of interest for hydrophones and medical imaging because of their enhanced coupling with water or biological tissue due to acoustic impedance matching. Multilayer lead zirconate titanate (PZT) substrates with dense and porous interlayers were produced by tape casting of aqueous PZT slips with high solids contents. The use of latex binders with low viscosity enabled addition of starch as a fugitive additive to create air/ceramic composites with ´3-3´connectivity. Microstructures, piezoelectric and mechanical properties of sintered, poled laminates were evaluated

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16

Huang, Cheng-Liang, and Shih-Sheng Liu. "End-coupled microstrip slow-wave resonator filtlers using high-permittivity ceramic substrate." Microwave and Optical Technology Letters 51, no. 6 (2009): 1613–15. http://dx.doi.org/10.1002/mop.24366.

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17

Hoorfar, A., and A. Perrotta. "An experimental study of microstrip antennas on very high permittivity ceramic substrates and very small ground planes." IEEE Transactions on Antennas and Propagation 49, no. 5 (2001): 838–40. http://dx.doi.org/10.1109/8.929638.

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18

Tan, Qiulin, Zhong Ren, Ting Cai, et al. "Wireless Passive Temperature Sensor Realized on Multilayer HTCC Tapes for Harsh Environment." Journal of Sensors 2015 (2015): 1–8. http://dx.doi.org/10.1155/2015/124058.

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A wireless passive temperature sensor is designed on the basis of a resonant circuit, fabricated on multilayer high temperature cofired ceramic (HTCC) tapes, and measured with an antenna in the wireless coupling way. Alumina ceramic used as the substrate of the sensor is fabricated by lamination and sintering techniques, and the passive resonant circuit composed of a planar spiral inductor and a parallel plate capacitor is printed and formed on the substrate by screen-printing and postfiring processes. Since the permittivity of the ceramic becomes higher as temperature rises, the resonant freq

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19

Rhbanou, Ahmed, Seddik Bri, and Mohamed Sabbane. "Analysis of Substrate Integrated Waveguide (SIW) Resonator and Design of Miniaturized SIW Bandpass Filter." International Journal of Electronics and Telecommunications 63, no. 3 (2017): 255–60. http://dx.doi.org/10.1515/eletel-2017-0034.

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Abstract In this paper, the substrate integrated waveguide (SIW) resonator is designed to study the influence of dielectric materials on its operating parameters (insertion loss, fractional bandwidth and unloaded Q-factor). The results obtained show that the use of high permittivity substrate in the SIW resonator by increasing its thickness allows reducing the size of resonator by causing the increase in its unloaded Q-factor. A SIW bandpass filter is designed using low temperature co-fired ceramic (LTCC) technology and high permittivity substrate. The filter has a fractional bandwidth of 27 %

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20

Chen, Yuan-Bin, Cheng-Liang Huang, and Shih-Hung Lin. "Planar compact, broad-stopband elliptic-function lowpass filters using high-permittivity ceramic substrate." Microwave and Optical Technology Letters 48, no. 7 (2006): 1432–36. http://dx.doi.org/10.1002/mop.21635.

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21

Zhang, Li, Zhen Xing Yue, and Long Tu Li. "Low Dielectric Loss Polymer-Ceramic Composites for Wireless Temperature Sensation." Key Engineering Materials 602-603 (March 2014): 752–56. http://dx.doi.org/10.4028/www.scientific.net/kem.602-603.752.

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The low dielectric loss polymer-ceramic composites with high density polyethylene (HDPE) as matrix and BaO-Nd2O3-TiO2(BNT) as filter for wireless temperature sensation were prepared by an extrusion processing technique. For 30vol % ceramic loaded HDPE, as the ambient temperature increases from 30 to 100 °C, the relative permittivity and loss tangent of the composite vary from 6.25 to 6.09 and from 0.004 to 0.011 respectively, and the temperature coefficient of relative permittivity is -370ppm/°C. By using this composite as the patch microstrip antenna substrate, a simple UHF RFID temperature s

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22

Weiling, Xiao, Xiao Peng, Luo Heng, Zhou Wei, and Li Yang. "Preparation and Dielectric Properties of Si3N4/BN(CB) Composite Ceramic." High Temperature Materials and Processes 35, no. 5 (2016): 523–29. http://dx.doi.org/10.1515/htmp-2015-0015.

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AbstractSi3N4/nano-carbon black (CB) composite ceramics with boron nitride (BN) as interphase were fabricated by gelcasting. The results of scanning electron microscopy (SEM) and X-ray diffraction (XRD) showed that the structures of BN interphase and BN coated CB were formed and were uniform distributed in the Si3N4 ceramic. The permittivity (ε′ε″) of BN-coated CB was obviously lower than that of the pure CB, and the impedance of the BN-coated CB particles was close to the Z0 (Z0 = 1, Z0 is impedance under vacuum) compared with that of the CB particles; therefore, electromagnetic wave can ente

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23

Galizia, Pietro, Maksimas Anbinderis, Robertas Grigalaitis, et al. "Magneto-dielectric characterization of TiO2-CoFe2O4 derived ceramic composites." Processing and Application of Ceramics 12, no. 4 (2018): 350–56. http://dx.doi.org/10.2298/pac1804350g.

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Dielectric permittivity (??), magnetic permeability (??) and dielectric and magnetic loss (tan ?? and tan ??, respectively) of magneto-dielectric cobalt ferrite-titania (CFO-TO) ceramic composites are determined from 200 to 300MHz. The four different combinations of phases - that can be produced in the sintered composite, according to the starting CFO/TO molar ratio - allow to tune the macroscopic permittivity and permeability. For the first time impedance, miniaturization and magneto-dielectric loss of the four classes of composites are calculated and discussed. The displayed miniaturization

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24

Rhbanou, Ahmed, Fadl El, Nawfal Jebbor, and Seddik Bri. "New design of miniature C-band substrate integrated waveguide bandpass filters using ceramic material." FME Transactions 49, no. 1 (2021): 103–12. http://dx.doi.org/10.5937/fme2101103r.

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This article presents new structures and methods of design of miniature third-order substrate integrated waveguide (SIW) bandpass filters on a high-permittivity ceramic substrate for the C-band. The aim was to appraise the feasibility of such filters by using a 3D electromagnetic (EM) simulator. The substrate integrated waveguide (SIW) offers good quality factors and electrical performances compared with other planar techniques. Its integration capabilities and fabrication cost are other benefits that make it attractive. Ceramic material offer electrical properties suitable in designing of pas

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25

Peng, Zhiwei, Jiann-Yang Hwang, Matthew Andriese, Yuanbo Zhang, Guanghui Li, and Tao Jiang. "Electromagnetic characteristics of low-permittivity ceramics as substrates for mushroom-like high impedance surfaces." Ceramics International 41, no. 2 (2015): 3058–63. http://dx.doi.org/10.1016/j.ceramint.2014.10.145.

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26

Tzou, Wen-Cheng, Hua-Ming Chen, Ying-Chung Chen, and Cheng-Fu Yang. "Bandwidth enhancement of U-slot patch antenna on high permittivity ceramic substrate for Bluetooth application." Microwave and Optical Technology Letters 36, no. 6 (2003): 499–501. http://dx.doi.org/10.1002/mop.10802.

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27

Petzelt, Jan. "Infrared and THz spectroscopy of nanostructured dielectrics." Processing and Application of Ceramics 3, no. 3 (2009): 145–55. http://dx.doi.org/10.2298/pac0903145p.

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Results achieved using the infrared/THz spectroscopy of various inhomogeneous dielectrics in the Department of Dielectrics, Institute of Physics, Prague, during the last decade are briefly reviewed. The discussion concerns high-permittivity ceramics with inevitable low-permittivity dead layers along the grain boundaries, relaxor ferroelectrics with highly anisotropic polar nano-regions, classical matrix-type composites, core-shell composites, filled nanoporous glasses, polycrystalline and epitaxial thin films, heterostructures and superlattices on dielectric substrates. The analysis using mode

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28

Ullah, M. Habib, Mohammad T. Islam, J. S. Mandeep, and N. Misran. "Ceramic-polytetrafluoroethylene composite material-based miniaturized split-ring patch antenna." Science and Engineering of Composite Materials 21, no. 3 (2014): 405–10. http://dx.doi.org/10.1515/secm-2013-0149.

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AbstractA ceramic-polytetrafluoroethylene high-permittivity dielectric material-based split-ring patch antenna of dimensions 12 mm×16 mm is presented in this paper. The measured operating bandwidths (reflection coefficient <-10 dB) range from 5.0 to 6.5 GHz (1.5 GHz), 9.1 to 9.6 GHz (500 MHz), and 10.7 to 11 GHz (300 MHz) as observed from the proposed antennas. Average gains of 0.69, 3.52, and 3.48 dBi were measured at the first, second, and third band, respectively. Radiation efficiencies of 87.3%, 88.5%, and 93.1% were achieved at three resonant frequencies 5.6, 9.5, and 10.9 GHz, respect

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29

Ahmed, Gulzar, Asif Sultan, Tariqullah Jan, Majid Ashraf, and Muhammad Sarim. "A Novel Low Profile Rectangular Microstrip Patch Antenna for L-Band Applications Using High Permittivity Substrate." Mehran University Research Journal of Engineering and Technology 38, no. 4 (2019): 915–22. http://dx.doi.org/10.22581/muet1982.1904.05.

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A novel low-profile and miniaturized patch antenna on a substrate material of high dielectric constant has been designed, fabricated and tested in an indigenous laboratory. It is highly important to reduce the size of patch antenna as it limits the reduction of the sizes of the devices using this antenna. A number of techniques have been given for the size reduction of patch such as DGS (Defected Ground Structure), use of fractals and the use of metamaterials but in this paper the technique of high permittivity substrate has been implemented. The substrate as well as this conventional antenna

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30

Mesgarpour Tousi, Maryam, and Mona Ghassemi. "Effects of Frequency and Temperature on Electric Field Mitigation Method via Protruding Substrate Combined with Applying Nonlinear FDC Layer in Wide Bandgap Power Modules." Energies 13, no. 8 (2020): 2022. http://dx.doi.org/10.3390/en13082022.

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Our previous studies showed that geometrical techniques including (1) metal layer offset, (2) stacked substrate design and (3) protruding substrate, either individually or combined, cannot solve high electric field issues in high voltage high-density wide bandgap (WBG) power modules. Then, for the first time, we showed that a combination of the aforementioned geometrical methods and the application of a nonlinear field-dependent conductivity (FDC) layer could address the issue. Simulations were done under a 50 Hz sinusoidal AC voltage per IEC 61287-1. However, in practice, the insulation mater

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31

Castro, Juan, Eduardo Rojas, Thomas Weller, and Jing Wang. "High-Permittivity and Low-Loss Electromagnetic Composites Based on Co-fired Ba0.55Sr0.45TiO3 or MgCaTiO2 Microfillers for Additive Manufacturing and Their Application to 3-D Printed K-Band Antennas." Journal of Microelectronics and Electronic Packaging 13, no. 3 (2016): 102–12. http://dx.doi.org/10.4071/imaps.509.

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Six types of high-permittivity and low-loss electromagnetic (EM) composites based on a polydimethylsiloxane (PDMS) or cyclo-olefin polymer (COP) host matrix, reinforced by Ba0.55Sr0.45TiO3 or MgCaTiO2 microparticle fillers with volume loading concentration up to 49 vol. %, have been prepared and characterized up to 20 GHz using cavity resonators. These high dielectric permittivity (high-k) ceramic powders were sintered at temperatures up to 1,500°C to further enhance their dielectric properties. The 49 vol. % loaded PDMS-Ba0.55Sr0.45TiO3 composites with 1,340°C sintered fillers have a relative

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32

Gaya, Abinash, Mohd Haizal Jamaluddin, Irfan Ali, and Ayman A. Althuwayb. "Circular Patch Fed Rectangular Dielectric Resonator Antenna with High Gain and High Efficiency for Millimeter Wave 5G Small Cell Applications." Sensors 21, no. 8 (2021): 2694. http://dx.doi.org/10.3390/s21082694.

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A novel method of feeding a dielectric resonator using a metallic circular patch antenna at millimeter wave frequency band is proposed here. A ceramic material based rectangular dielectric resonator antenna with permittivity 10 is placed over a rogers RT-Duroid based substrate with permittivity 2.2 and fed by a metallic circular patch via a cross slot aperture on the ground plane. The evolution study and analysis has been done using a rectangular slot and a cross slot aperture. The cross-slot aperture has enhanced the gain of the single element non-metallic dielectric resonator antenna from 6.

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33

Ronkainen, Helena, Ulla Kanerva, Tommi Varis, et al. "Materials for Electronics by Thermal Spraying." Materials Science Forum 762 (July 2013): 451–56. http://dx.doi.org/10.4028/www.scientific.net/msf.762.451.

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In this paper, dielectric and conductive properties of thermally sprayed Al2O3- and Cu-based coatings on steel and alumina substrates were studied. Alumina powders with nanoand micro-sized additions of Ni, NiO, TiO2, silica, and commercial glass were used in High Velocity Oxygen Fuel (HVOF) deposition. The conventional commercial copper powder and three Ag, WC and H2 -modified powders were used in Direct Write Thermal Spray (DWTS) deposition. Mixed phases of α-Al2O3 and γ-Al2O3 were found to be present in the as-deposited coatings. Sprayed alumina-based composites exhibited dielectric permitti

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34

Friederich, A., C. Kohler, M. Sazegar, et al. "Preparation of Integrated Passive Microwave Devices Through Inkjet Printing." Additional Conferences (Device Packaging, HiTEC, HiTEN, and CICMT) 2013, CICMT (2013): 000232–39. http://dx.doi.org/10.4071/cicmt-2013-tha24.

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Barium strontium titanate (BST) is a promising material for passive tunable microwave devices such as phase shifters or tunable matching networks. This publication covers the preparation of BST thick-films for microwave applications through inkjet printing. Two barium strontium titanate (BST) inks were prepared, printed on alumina substrates and sintered at different temperatures. The first ink was prepared with pure BST and sintered between 1100°C and 1200°C. The second ink was prepared with a BST–ZnO–B2O3 composition and was suitable to reduce the sintering temperature down to 800°C. The mic

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35

Shi, Di, Taimur Aftab, Gunnar Gidion, Fatma Sayed, and Leonhard M. Reindl. "A Novel Electrically Small Ground-Penetrating Radar Patch Antenna with a Parasitic Ring for Respiration Detection." Sensors 21, no. 6 (2021): 1930. http://dx.doi.org/10.3390/s21061930.

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An electrically small patch antenna with a low-cost high-permittivity ceramic substrate material for use in a ground-penetrating radar is proposed in this work. The antenna is based on a commercial ceramic 915 MHz patch antenna with a size of 25 × 25 × 4 mm3 and a weight of 12.9 g. The influences of the main geometric parameters on the antenna’s electromagnetic characteristics were comprehensively studied. Three bandwidth improvement techniques were sequentially applied to optimize the antenna: tuning the key geometric parameters, adding cuts on the edges, and adding parasitic radiators. The d

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36

Pan, Chung-Long, Chun-Hsu Shen, Shih-Hung Lin, and Qi-Zi Lin. "Tunable Microwave Dielectric Properties of Ca0.6La0.8/3TiO3 and Ca0.8Sm0.4/3TiO3-Modified (Mg0.6Zn0.4)0.95Ni0.05TiO3 Ceramics with a Near-Zero Temperature Coefficient." Molecules 26, no. 16 (2021): 4715. http://dx.doi.org/10.3390/molecules26164715.

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The microstructures and microwave dielectric properties of (Mg0.6Zn0.4)0.95Ni0.05TiO3 with Ca0.6La0.8/3TiO3 and Ca0.8Sm0.4/3TiO3 additions prepared by the solid-state method has been investigated. The crystallization and microstructures of these two mixed dielectrics were checked by XRD, EDX, BEI, and SEM to demonstrate two phase systems. Furthermore, the tunable dielectric properties can be achieved by adjusting the amounts of Ca0.6La0.8/3TiO3 and Ca0.8Sm0.4/3TiO3 additions, respectively. After optimization of processed parameters, a new dielectric material system 0.88(Mg0.6Zn0.4)0.95Ni0.05Ti

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37

Strunck, Sebastian, Alexander Gaebler, Onur H. Karabey, et al. "Reliability study of a tunable Ka-band SIW-phase shifter based on liquid crystal in LTCC-technology." International Journal of Microwave and Wireless Technologies 7, no. 5 (2014): 521–27. http://dx.doi.org/10.1017/s175907871400083x.

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A tunable substrate-integrated waveguide phase shifter using low-temperature co-fired ceramic (LTCC)-technology is presented in this paper. By changing the effective permittivity in the liquid crystal (LC)-filled waveguide, the differential phase can be tuned continuously. This is achieved by means of an analog signal applied to the electrodes, surrounding the LC. The design allows for precise tuning of the differential phase, which is proven with a Monte Carlo measurement resulting in phase errors of less than 3° at 28 GHz. Besides that, the ambient temperature dependency of the module is sho

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38

Jasińska, Laura, Karol Malecha, Krzysztof Szostak, and Piotr Słobodzian. "Impact of process parameters on printing resolution and dielectric properties of LTCC substrate." Microelectronics International 36, no. 3 (2019): 114–19. http://dx.doi.org/10.1108/mi-12-2018-0083.

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Purpose The low-temperature co-fired ceramics (LTCC) microfluidic-microwave devices fabrication requires careful consideration of two main factors: the accuracy of deposition of conductive paths and the modification needed to the standard process of the LTCC technology. Neither of them are well-described in the literature. Design/methodology/approach The first part of this paper deals with the individual impact of screen parameters such as aperture, photosensitive emulsion thickness and mounting angle on the precision of the screen-printed conductive paths fabrication. For the quantitative ana

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39

Leupold, Nico, Michael Schubert, Jaroslaw Kita, and Ralf Moos. "Influence of high temperature annealing on the dielectric properties of alumina films prepared by the aerosol deposition method." Functional Materials Letters 11, no. 02 (2018): 1850022. http://dx.doi.org/10.1142/s1793604718500224.

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The aerosol deposition method (ADM) is a novel coating technique that allows to fabricate dense and nanocrystalline ceramic films at room temperature. To investigate the dielectric properties of aerosol deposited alumina films at high temperatures and the influence of annealing on them, the temperature was increased in steps of 100[Formula: see text]C from 200[Formula: see text]C to 900[Formula: see text]C and subsequently cooled down stepwise again. At each step, the dielectric properties were measured by impedance spectroscopy between 50[Formula: see text]mHz and 200[Formula: see text]kHz. D

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Surendra, Loya, and Habibulla khan. "Design and Analysis of Cylindrical Dielectric Resonator Antenna for 5G Application." International Journal of Engineering and Advanced Technology 10, no. 2 (2020): 116–19. http://dx.doi.org/10.35940/ijeat.b2042.1210220.

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DRA’s are used for 5G communications of large bandwidth at sub 6GHz and millimeter to Terahertz. The channel capacity can achieve a very high data rate i.e. C=Blog2(1+SNR) where C is the channel capacity and B is the bandwidth of the channel. The cylindrical resonator antenna operating in hybrid HEM11⸹ mode. In this paper a cylindrical dielectric resonator antenna(CDRA) with frequency range (2-6GHz).The cylindrical dielectric resonator with radius r=10mm and height h=10mm. the CDRA material is alumina ceramic with a permittivity of εDRA is 9.9 and the resonant frequency is fr=4GHz. The substra

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Arab, Homa, Steven Dufour, Emilia Moldovan, Cevdet Akyel, and Serioja Tatu. "A 77-GHz Six-Port Sensor for Accurate Near-Field Displacement and Doppler Measurements." Sensors 18, no. 8 (2018): 2565. http://dx.doi.org/10.3390/s18082565.

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A continuous-wave (CW) radar sensor design based on a millimetre-wave six-port interferometer is proposed. A complete sensor prototype is conceived of, fabricated and measured at 77 GHz for short-range professional and industrial applications. This sensor is designed to measure distances and Doppler frequencies with high accuracy, at a reasonable cost. Accurate phase measurements are also performed using the six-port technology, which makes it a promising candidate for CW radar sensing applications. Advances in the performance and functionality of six-port sensors are surveyed to highlight rec

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Huang, Cheng-Liang, Shin-Tung Tasi, and Yuan-Bin Chen. "Band-pass filters using high-permittivity ceramics substrate." Microwave and Optical Technology Letters 52, no. 10 (2010): 2344–47. http://dx.doi.org/10.1002/mop.25439.

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Chen, Yuan-Bin, Cheng-Liang Huang, and Ching-Wen Lo. "Planar compact elliptic-function low-pass filter using high-permittivity ceramics substrate." Microwave and Optical Technology Letters 48, no. 7 (2006): 1393–98. http://dx.doi.org/10.1002/mop.21637.

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Ehata, Katsufumi, Shenglei Che, and Norimasa Sakamoto. "A Technique for Permittivity Measurement of Ceramic Powders at Microwave Frequencies." Key Engineering Materials 320 (September 2006): 185–88. http://dx.doi.org/10.4028/www.scientific.net/kem.320.185.

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Details of a new technique for the permittivity measurement of ceramic powders at microwave frequencies are described. Permittivity of a powder is calculated from the permittivity of liquid medium and that of the slurry made from the liquid medium and the powder. Measured permittivities of BaNd2Ti4O12 ceramic powders vary by processing conditions of the powders. This result is consistent with permittivities of composite substrates made from these powders and a thermosetting resin.

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Kot, J. S., N. Nikolic, and T. S. Bird. "Integrated-circuit antenna for high-permittivity substrates." IEE Proceedings - Microwaves, Antennas and Propagation 144, no. 1 (1997): 47. http://dx.doi.org/10.1049/ip-map:19970978.

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Roy, B., and D. Chakravorty. "High dielectric permittivity in glass-ceramic metal nanocomposites." Journal of Materials Research 8, no. 6 (1993): 1206–8. http://dx.doi.org/10.1557/jmr.1993.1206.

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Strands of nanometer-sized silver particles have been grown at the glass-crystal interface of a suitable glass-ceramic system. The samples exhibit high values of dielectric constant of the order of 500 at temperatures in the range of 80 to 200 K. This is believed to arise due to the Gorkov–Eliashberg anomaly. Above 200 K, a dielectric dispersion is observed, which is explained on the basis of a diagonal-layer heterogeneous conductor model.

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Golovina, Iryna, Ilia Geifman, and Anatolii Belous. "New ceramic EPR resonators with high dielectric permittivity." Journal of Magnetic Resonance 195, no. 1 (2008): 52–59. http://dx.doi.org/10.1016/j.jmr.2008.08.015.

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Mazzara, G. P., S. Skirius, G. Cao, et al. "High dielectric permittivity of ceramic and single-crystalPrBa2Cu3Ox." Physical Review B 47, no. 13 (1993): 8119–23. http://dx.doi.org/10.1103/physrevb.47.8119.

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Huang, Cheng-Liang, Yuan-Bin Chen, and Meng-Lin Lee. "Quasi-elliptic function filters with a dual-passband response with high-permittivity ceramics substrate." Microwave and Optical Technology Letters 51, no. 1 (2008): 245–48. http://dx.doi.org/10.1002/mop.23962.

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Aussenhofer, S. A., and A. G. Webb. "High-permittivity solid ceramic resonators for high-field human MRI." NMR in Biomedicine 26, no. 11 (2013): 1555–61. http://dx.doi.org/10.1002/nbm.2990.

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