Dielectric and patch antenna characteristics of new high-Q (1 - x)(Al1/2Ta1/2)O2-x(Mg1/3Ta2/3 )O2 (0 ≤ x ≤ 1.0) microwave ceramics

Ji Won Choi; Chong Yun Kang; Sung Hun Sim; Seok Jin Yoon; Hyun Jai Kim; Ki Hyun Yoon

doi:10.1016/S0254-0584(02)00286-9

Dielectric and patch antenna characteristics of new high-Q (1 - x)(Al_1/2Ta_1/2)O₂-x(Mg_1/3Ta_2/3)O₂ (0 ≤ x ≤ 1.0) microwave ceramics

Ji Won Choi, Chong Yun Kang, Sung Hun Sim, Seok Jin Yoon, Hyun Jai Kim, Ki Hyun Yoon

Research output: Contribution to journal › Article › peer-review

5 Citations (Scopus)

Abstract

The microwave dielectric properties of (1-x)(Al_1/2Ta_1/2)O₂-x(Mg_1/3Ta_{2/ 3})O₂ (AMT) (0 ≤ x ≤ 1.0) ceramics and design of small coplanar waveguide fed antenna (CPWFA) have been investigated. As (Mg_1/3Ta_2/3)O₂ concentration increased, dielectric constant (_r) and quality factor (Q) significantly increased and the temperature coefficient of resonant frequency (τ_f) changed from negative to positive value. The τ_f of 0 ppm°C^-1 was realized at x = 0.65 and the Qf₀ value and _r for this composition were 112470 GHz and 26.1, respectively. A newly developed 0.35(Al_1/2Ta_1/2)O₂-0.65(Mg_1/3Ta_2/3)O₂ dielectric materials were used for 1.5 GHz band CPWFA design and fabrication. The size of the CPWFA can be reduced by using AMT ceramics with high dielectric constant, insetting slits into patch, and fabricating CPW feed line in the ground plane. The slits play roles in not only lowering a center frequency but also fine-tuning for the proposed CPWFA together with open stub of CPW feed line. The CPWFA with slits has the lower center frequency than the conventional CPWFA, which suggests that an antenna size can reduce as large as 16.3%. Experimental results of the fabricated device were in good agreement with the simulation.

Original language	English
Pages (from-to)	247-251
Number of pages	5
Journal	Materials Chemistry and Physics
Volume	79
Issue number	2-3
DOIs	https://doi.org/10.1016/S0254-0584(02)00286-9
Publication status	Published - 2003 Apr 10

Keywords

CPWFA
Dielectric constant
Microwave
Quality factor
Slit

ASJC Scopus subject areas

General Materials Science
Condensed Matter Physics

Access to Document

10.1016/S0254-0584(02)00286-9

Cite this

@article{5f49ac2a7b5e4ee1bd013cdf68d71b7d,

title = "Dielectric and patch antenna characteristics of new high-Q (1 - x)(Al1/2Ta1/2)O2-x(Mg1/3Ta2/3 )O2 (0 ≤ x ≤ 1.0) microwave ceramics",

abstract = "The microwave dielectric properties of (1-x)(Al1/2Ta1/2)O2-x(Mg1/3Ta2/ 3)O2 (AMT) (0 ≤ x ≤ 1.0) ceramics and design of small coplanar waveguide fed antenna (CPWFA) have been investigated. As (Mg1/3Ta2/3)O2 concentration increased, dielectric constant (r) and quality factor (Q) significantly increased and the temperature coefficient of resonant frequency (τf) changed from negative to positive value. The τf of 0 ppm°C-1 was realized at x = 0.65 and the Qf0 value and r for this composition were 112470 GHz and 26.1, respectively. A newly developed 0.35(Al1/2Ta1/2)O2-0.65(Mg1/3Ta 2/3)O2 dielectric materials were used for 1.5 GHz band CPWFA design and fabrication. The size of the CPWFA can be reduced by using AMT ceramics with high dielectric constant, insetting slits into patch, and fabricating CPW feed line in the ground plane. The slits play roles in not only lowering a center frequency but also fine-tuning for the proposed CPWFA together with open stub of CPW feed line. The CPWFA with slits has the lower center frequency than the conventional CPWFA, which suggests that an antenna size can reduce as large as 16.3%. Experimental results of the fabricated device were in good agreement with the simulation.",

keywords = "CPWFA, Dielectric constant, Microwave, Quality factor, Slit",

author = "Choi, {Ji Won} and Kang, {Chong Yun} and Sim, {Sung Hun} and Yoon, {Seok Jin} and Kim, {Hyun Jai} and Yoon, {Ki Hyun}",

year = "2003",

month = apr,

day = "10",

doi = "10.1016/S0254-0584(02)00286-9",

language = "English",

volume = "79",

pages = "247--251",

journal = "Materials Chemistry and Physics",

issn = "0254-0584",

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TY - JOUR

T1 - Dielectric and patch antenna characteristics of new high-Q (1 - x)(Al1/2Ta1/2)O2-x(Mg1/3Ta2/3 )O2 (0 ≤ x ≤ 1.0) microwave ceramics

AU - Choi, Ji Won

AU - Kang, Chong Yun

AU - Sim, Sung Hun

AU - Yoon, Seok Jin

AU - Kim, Hyun Jai

AU - Yoon, Ki Hyun

PY - 2003/4/10

Y1 - 2003/4/10

N2 - The microwave dielectric properties of (1-x)(Al1/2Ta1/2)O2-x(Mg1/3Ta2/ 3)O2 (AMT) (0 ≤ x ≤ 1.0) ceramics and design of small coplanar waveguide fed antenna (CPWFA) have been investigated. As (Mg1/3Ta2/3)O2 concentration increased, dielectric constant (r) and quality factor (Q) significantly increased and the temperature coefficient of resonant frequency (τf) changed from negative to positive value. The τf of 0 ppm°C-1 was realized at x = 0.65 and the Qf0 value and r for this composition were 112470 GHz and 26.1, respectively. A newly developed 0.35(Al1/2Ta1/2)O2-0.65(Mg1/3Ta 2/3)O2 dielectric materials were used for 1.5 GHz band CPWFA design and fabrication. The size of the CPWFA can be reduced by using AMT ceramics with high dielectric constant, insetting slits into patch, and fabricating CPW feed line in the ground plane. The slits play roles in not only lowering a center frequency but also fine-tuning for the proposed CPWFA together with open stub of CPW feed line. The CPWFA with slits has the lower center frequency than the conventional CPWFA, which suggests that an antenna size can reduce as large as 16.3%. Experimental results of the fabricated device were in good agreement with the simulation.

AB - The microwave dielectric properties of (1-x)(Al1/2Ta1/2)O2-x(Mg1/3Ta2/ 3)O2 (AMT) (0 ≤ x ≤ 1.0) ceramics and design of small coplanar waveguide fed antenna (CPWFA) have been investigated. As (Mg1/3Ta2/3)O2 concentration increased, dielectric constant (r) and quality factor (Q) significantly increased and the temperature coefficient of resonant frequency (τf) changed from negative to positive value. The τf of 0 ppm°C-1 was realized at x = 0.65 and the Qf0 value and r for this composition were 112470 GHz and 26.1, respectively. A newly developed 0.35(Al1/2Ta1/2)O2-0.65(Mg1/3Ta 2/3)O2 dielectric materials were used for 1.5 GHz band CPWFA design and fabrication. The size of the CPWFA can be reduced by using AMT ceramics with high dielectric constant, insetting slits into patch, and fabricating CPW feed line in the ground plane. The slits play roles in not only lowering a center frequency but also fine-tuning for the proposed CPWFA together with open stub of CPW feed line. The CPWFA with slits has the lower center frequency than the conventional CPWFA, which suggests that an antenna size can reduce as large as 16.3%. Experimental results of the fabricated device were in good agreement with the simulation.

KW - CPWFA

KW - Dielectric constant

KW - Microwave

KW - Quality factor

KW - Slit

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DO - 10.1016/S0254-0584(02)00286-9

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