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Title: Trends of microwave dielectric materials for antenna application

Abstract

Rapid development of a modern microwave communication system requires a high quality microwave dielectric ceramic material to be used as mobile and satellite communication. High permittivity of dielectric ceramics leads to fabrication of compact device for electronic components. Dielectric ceramics which used for microwave applications required three important parameters such as high or appropriate permittivity (ε{sub r}), high quality factor (Q {sub f} ≥ 5000 GH z) and good temperature coefficient of resonant frequency (τ{sub f}). This paper review of various dielectric ceramic materials used as microwave dielectric materials and related parameters for antenna applications.

Authors:
;  [1];  [2]
  1. School of Microelectronic Engineering, Universiti Malaysia Perlis, Pauh Putra Campus, 02600 Arau, Perlis (Malaysia)
  2. Sustainable Engineering Research Cluster, School of Material Engineering, Universiti Malaysia Perlis, Blok B, Taman Pertiwi Indah, Seriab, 01000 Kangar, Perlis (Malaysia)
Publication Date:
OSTI Identifier:
22608477
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1756; Journal Issue: 1; Conference: ICoFM 2016: 2. international conference on functional materials and metallurgy, Penang (Malaysia), 28 May 2016; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ANTENNAS; CERAMICS; DIELECTRIC MATERIALS; MICROWAVE RADIATION; PERMITTIVITY; QUALITY FACTOR; TEMPERATURE COEFFICIENT

Citation Formats

Sulong, T. A. T., E-mail: tuanamirahtuansulong@gmail.com, Osman, R. A. M., E-mail: rozana@unimap.edu.my, and Idris, M. S., E-mail: sobri@unimap.edu.my. Trends of microwave dielectric materials for antenna application. United States: N. p., 2016. Web. doi:10.1063/1.4958779.
Sulong, T. A. T., E-mail: tuanamirahtuansulong@gmail.com, Osman, R. A. M., E-mail: rozana@unimap.edu.my, & Idris, M. S., E-mail: sobri@unimap.edu.my. Trends of microwave dielectric materials for antenna application. United States. doi:10.1063/1.4958779.
Sulong, T. A. T., E-mail: tuanamirahtuansulong@gmail.com, Osman, R. A. M., E-mail: rozana@unimap.edu.my, and Idris, M. S., E-mail: sobri@unimap.edu.my. Tue . "Trends of microwave dielectric materials for antenna application". United States. doi:10.1063/1.4958779.
@article{osti_22608477,
title = {Trends of microwave dielectric materials for antenna application},
author = {Sulong, T. A. T., E-mail: tuanamirahtuansulong@gmail.com and Osman, R. A. M., E-mail: rozana@unimap.edu.my and Idris, M. S., E-mail: sobri@unimap.edu.my},
abstractNote = {Rapid development of a modern microwave communication system requires a high quality microwave dielectric ceramic material to be used as mobile and satellite communication. High permittivity of dielectric ceramics leads to fabrication of compact device for electronic components. Dielectric ceramics which used for microwave applications required three important parameters such as high or appropriate permittivity (ε{sub r}), high quality factor (Q {sub f} ≥ 5000 GH z) and good temperature coefficient of resonant frequency (τ{sub f}). This paper review of various dielectric ceramic materials used as microwave dielectric materials and related parameters for antenna applications.},
doi = {10.1063/1.4958779},
journal = {AIP Conference Proceedings},
number = 1,
volume = 1756,
place = {United States},
year = {Tue Jul 19 00:00:00 EDT 2016},
month = {Tue Jul 19 00:00:00 EDT 2016}
}
  • Microwave gas discharges excited near a dielectric surface are investigated. Such discharges can exist over a broad range of gas pressures and thereby can be used to solve a wide variety of applied problems. The wave dispersion properties favorable for discharge excitation are analyzed, and a kinetic discharge model is considered that can be used to calculate the discharge parameters. A model of a steady discharge at gas pressures of 10{sup 2}-10{sup 4} Pa is constructed.
  • Spinel ferrite Ni{sub 0.5}Zn{sub 0.3}Co{sub 0.2}Fe{sub 1.98}O{sub 4−x} nanoparticles were synthesized by co-precipitation method, and samples were realized by moulding and annealing at key temperatures (T{sub M} = 800 °C, 900 °C, 1050 °C, determined beforehand through shrinkage measurements) going with calcining and sintering processes. Annealing at 800 °C and 900 °C led to half-dense ceramics (porosity ∼50 vol. %), whereas bulky ferrite was obtained after annealing at 1050 °C. Elemental analysis, X-ray diffraction and ion chromatography analysis were performed. Complex dielectric permittivity (ε*) and magnetic permeability (μ*) were investigated up to 6 GHz. With increasing T{sub M}, a decreasing amount of Fe{sup 2+} was observed, going with increasingmore » sample density. Coupled effects of the Fe{sup 2+} concentration and of the porosity, both on dielectric and magnetic properties, were chiefly investigated and discussed. The materials show almost constant permittivities (ε′ = 5.0, 6.0, and 14.8 for T{sub M} = 800 °C, 900 °C and 1050 °C, respectively). The bulk value at f = 1 GHz (ε′ = 14.8) can be interpreted well according to Shannon's theory. The permittivities of the half-dense ceramics are discussed on the basis of Bruggeman's Effective Medium Theory. The materials annealed at 800 °C and 900 °C show almost constant magnetic permeabilities in the frequency range from 0.2 to 1 GHz (μ′ = 3.4 and 6.0 for T{sub M} = 800 °C and 900 °C). The observed permeability behavior is typical of monodomain particles, except for the sample annealed at 1050 °C, for which domain wall contribution to μ* is suspected because of non-negligible losses at low frequency (μ″ = 1.3–1.8 at f < 0.3 GHz). This finding is supported by estimations of the upper and lower values for the critical grain size, on the basis of Brown–Van der Zaag's theory. Facing bulk ceramics, and in view of using Ni{sub 0.5}Zn{sub 0.3}Co{sub 0.2}Fe{sub 1.98}O{sub 4−x} ferrite as substrate for antenna miniaturization, the electromagnetic properties of half-dense ceramics materials seem to be very competitive at frequencies beyond 0.2 GHz, and up to 0.7–0.8 GHz.« less
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  • A comparative study of four open-ended coaxial probe models which relate the coaxial line end impedance to the complex permittivity of the material under test is presented. The accuracy of the models in measuring lossy dielectric/biological material and their robustness as a function of the calibration materials are investigated. The four open-ended coaxial probe models studied are: capacitive model, antenna model, virtual line model, and rational function model. Experimental results taken on saline solutions as lossy materials are obtained for the four models.
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