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http://dx.doi.org/10.5515/KJKIEES.2010.21.9.933

Design of Modified Spiral Monopole Printed Antenna for Dual Band Operation  

Cheong, Sae-Han-Sol (Department of Electronics and Computer Engineering, Chonnam National University)
Jung, Jin-Woo (Department of Electronics and Computer Engineering, Chonnam National University)
Lim, Yeong-Seog (Department of Electronics and Computer Engineering, Chonnam National University)
Publication Information
The Journal of Korean Institute of Electromagnetic Engineering and Science / v.21, no.9, 2010 , pp. 933-939 More about this Journal
Abstract
In this paper, modified spiral monopole printed antenna for dual band operation in GPS(1.57~1.577 GHz) and WiBro(2.3~2.4 GHz), WLAN(2.4~2.48 GHz) is proposed. To control the frequency ratio of the antenna for dual band operation freely, distance between inner lines of the spiral is diversified by using the different current distribution between basic resonance frequency of spiral monopole antenna and harmonic resonance frequency$(3\lambda_H/4)$. And also the branch line is inserted. Bandwidth(-10 dB) of the antenna is measured 140 MHz(1.47~1.61 GHz) in basic resonance frequency and 420 MHz(2.29~2.71 GHz) in harmonic resonance frequency$(3\lambda_H/4)$. The peak antenna gains are measured 2.825 dBi in GPS(1.57 GHz), and 3.65 dBi in WiBro(2.35 GHz), and 4.564 dBi in WLAN(2.44 GHz).
Keywords
Monopole Antenna; Dual Band; Spiral; Branch; GPS; WiBro; WLAN;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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