A compact-size circularly polarized antenna using low-loss alumina substrates

Ching Fang Tseng; Cheng-Liang Huang; Allen Hsu

doi:10.1002/mop.21909

A compact-size circularly polarized antenna using low-loss alumina substrates

Ching Fang Tseng, Cheng-Liang Huang, Allen Hsu

Department of Electrical Engineering

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

Abstract

A compact-size circularly polarized antenna is investigated by employing high-permittivity and low-loss substrate (i.e., high Q × f value) for 2.5-GHz application. The antenna was individually fabricated on nano-Al ₂O₃ (ε_r = 9.7, Q × f value of 500,000 GHz) and Al₂O₃ (ε_r = 9.7, Q × f value of 200,000 GHz) substrates. The high-permittivity and low-loss ceramic substrate (nano-Al₂O₃ substrate) was used to reduce the microstrip antenna dimension on patch size. In addi tion, the ceramic substrate was studied for broadening the 3-dB axial ratio bandwidth [circular polarization (CP) bandwidth]. The obtained CP bandwidth is about 80 MHz (∼3.2%) at 2.5 GHz. The proposed antenna occupies a size of 23.4 × 23.4 × 4 mm³0 and obtains the operation bandwidth of about 90.96 MHz. Good antenna gain and CP radiation patterns have also been observed.

Original language	English
Pages (from-to)	2317-2320
Number of pages	4
Journal	Microwave and Optical Technology Letters
Volume	48
Issue number	11
DOIs	https://doi.org/10.1002/mop.21909
Publication status	Published - 2006 Nov 1

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Atomic and Molecular Physics, and Optics
Condensed Matter Physics
Electrical and Electronic Engineering

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title = "A compact-size circularly polarized antenna using low-loss alumina substrates",

abstract = "A compact-size circularly polarized antenna is investigated by employing high-permittivity and low-loss substrate (i.e., high Q × f value) for 2.5-GHz application. The antenna was individually fabricated on nano-Al 2O3 (εr = 9.7, Q × f value of 500,000 GHz) and Al2O3 (εr = 9.7, Q × f value of 200,000 GHz) substrates. The high-permittivity and low-loss ceramic substrate (nano-Al2O3 substrate) was used to reduce the microstrip antenna dimension on patch size. In addi tion, the ceramic substrate was studied for broadening the 3-dB axial ratio bandwidth [circular polarization (CP) bandwidth]. The obtained CP bandwidth is about 80 MHz (∼3.2%) at 2.5 GHz. The proposed antenna occupies a size of 23.4 × 23.4 × 4 mm30 and obtains the operation bandwidth of about 90.96 MHz. Good antenna gain and CP radiation patterns have also been observed.",

author = "Tseng, {Ching Fang} and Cheng-Liang Huang and Allen Hsu",

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AU - Tseng, Ching Fang

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N2 - A compact-size circularly polarized antenna is investigated by employing high-permittivity and low-loss substrate (i.e., high Q × f value) for 2.5-GHz application. The antenna was individually fabricated on nano-Al 2O3 (εr = 9.7, Q × f value of 500,000 GHz) and Al2O3 (εr = 9.7, Q × f value of 200,000 GHz) substrates. The high-permittivity and low-loss ceramic substrate (nano-Al2O3 substrate) was used to reduce the microstrip antenna dimension on patch size. In addi tion, the ceramic substrate was studied for broadening the 3-dB axial ratio bandwidth [circular polarization (CP) bandwidth]. The obtained CP bandwidth is about 80 MHz (∼3.2%) at 2.5 GHz. The proposed antenna occupies a size of 23.4 × 23.4 × 4 mm30 and obtains the operation bandwidth of about 90.96 MHz. Good antenna gain and CP radiation patterns have also been observed.

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