International Journal of RF and Microwave Computer-Aided Engineering

Volume 31, Issue 7 e22684

RESEARCH ARTICLE

A metallic 3D printed miniaturized circularly polarized log periodic Koch-dipole array antenna

Yichen Xiong,

Yichen Xiong

College of Electronics and Information Engineering, Sichuan University, Chengdu, China

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Bing Zhang,

Corresponding Author

Bing Zhang

[email protected]

orcid.org/0000-0001-7296-3314

College of Electronics and Information Engineering, Sichuan University, Chengdu, China

Correspondence

Bing Zhang, College of Electronics and Information Engineering, Sichuan University, Chengdu, China.

Email: [email protected]

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Yichen Xiong,

Yichen Xiong

College of Electronics and Information Engineering, Sichuan University, Chengdu, China

Search for more papers by this author

Bing Zhang,

Corresponding Author

Bing Zhang

[email protected]

orcid.org/0000-0001-7296-3314

College of Electronics and Information Engineering, Sichuan University, Chengdu, China

Correspondence

Bing Zhang, College of Electronics and Information Engineering, Sichuan University, Chengdu, China.

Email: [email protected]

Search for more papers by this author

First published: 09 April 2021

https://doi.org/10.1002/mmce.22684

Funding information: Fundamental Research Funds for the Central Universities of China, Grant/Award Numbers: 2019YJ0100, YJ201813

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Abstract

A miniaturized circularly polarized (CP) log periodic Koch-dipole array antenna (LPKDA) is proposed. Two pairs of dipoles are orthogonally deployed along the feeding line to generate the CP EM wave. The antenna's size is miniaturized by the T-shaped top loading and the Koch fractal structure, which also helps to widened the antenna's axial ratio bandwidth. Compared with the conventional LPDA of the same impedance bandwidth, the proposed miniaturized CPLPKDA features 42%-dimensional reduction. Taking the advantage of 3D printing technology to fabricate complex structures, the proposed CPLPKDA is fabricated by selective laser melting (SLM) using aluminum alloy. Measurement shows that the antenna has the average gain of 5.1 dBi from 2.1 to 3.0 GHz. It has impendence bandwidth (IBW) from 1.65 to 3.73 GHz (77.3%) and axial ratio bandwidth (ARBW) from 2.1 to 2.95 GHz (33.6%). Desirable radiation patterns are achieved. This letter proves the feasibility of antenna optimization by using both innovative design and advanced fabrication process.

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DATA AVAILABILITY STATEMENT

Data sharing is not applicable to this article as no new data were created or analyzed in this study.

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A metallic 3D printed miniaturized circularly polarized log periodic Koch-dipole array antenna

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A metallic 3D printed miniaturized circularly polarized log periodic Koch-dipole array antenna

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