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Square Patch Antanna with Switchable Polarization Using Spur-line and PIN Diode  

Jang Tai-Un (Department of Radio Sciences and Engineering, Korea University)
Sung Young-Je (Department of Radio Sciences and Engineering, Korea University)
Kim Young-Sik (Department of Radio Sciences and Engineering, Korea University)
Publication Information
The Journal of Korean Institute of Electromagnetic Engineering and Science / v.15, no.12, 2004 , pp. 1178-1183 More about this Journal
Abstract
In this paper, a novel microstrip patch antenna with switchable polarization is proposed. The proposed antenna has a simple structure, consisting of a square radiating patch, a pair of L-type spur-lines, and a microstrip line feed. It can produce either linear polarization or circular polarization by setting the diode on or off From the measured results, low cross polarization levels when operated in the linear polarization, and good axial ratios in the circular state have been observed.
Keywords
Switchable Polarization; L-type Spur-line; I-type Slot-line; Axial Ratio; Cross Polarization Level;
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