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http://dx.doi.org/10.5515/KJKIEES.2013.24.7.678

Design of a Dual-Band GPS Array Antenna  

Kim, Heeyoung (School of Electronic and Electrical Engineering, Hongik University)
Byun, Gangil (School of Electronic and Electrical Engineering, Hongik University)
Son, Seok Bo (School of Electronic and Electrical Engineering, Hongik University)
Choo, Hosung (School of Electronic and Electrical Engineering, Hongik University)
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Abstract
In this paper, we propose a design of dual-band patch antennas for Global Positioning System(GPS) applications, and the designed antenna is used as an individual element of GPS arrays. A low distortion and a high isolation of the array are achieved by adjusting rotating angles of each array element. The antenna consists of two radiating patches that operate in the GPS $L_1$ and $L_2$ bands, and the two ports feeding network with a hybrid chip coupler is adopted to achieve a broad circular polarization(CP) bandwidth. The rotating angles of each antenna element are varied with four directions(${\phi}=0^{\circ}$, ${\phi}=90^{\circ}$, ${\phi}=180^{\circ}$, ${\phi}=270^{\circ}$) in order to minimize the pattern distortion and maximize the isolation among array elements. The measurement shows bore-sight gains of 0.3 dBic($L_1$) and -1.0 dBic($L_2$) for the center element. Bore-sight gains of 1.6 dBic($L_1$) and 1.0 dBic($L_2$) are observed for the edge element. This results demonstrate that the proposed antenna is suitable for GPS array applications.
Keywords
GPS Antenna; Array Antenna; Feed Structure;
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Times Cited By KSCI : 3  (Citation Analysis)
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