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http://dx.doi.org/10.5515/KJKIEES.2014.25.1.1

Reconfigurable Polarization Patch Antenna with Y-Shaped Feed  

Lee, Da-Ae (Department of Electronic Engineering, Kyonggi University)
Sung, Youngje (Department of Electronic Engineering, Kyonggi University)
Publication Information
The Journal of Korean Institute of Electromagnetic Engineering and Science / v.25, no.1, 2014 , pp. 1-9 More about this Journal
Abstract
In this paper, a reconfigurable polarization patch antenna that uses a Y-shaped feed is proposed. The proposed antenna consists of a square patch, a Y-shaped feeding structure, a PIN diode, and a bias circuit for diode operation. The structural symmetry/asymmetry of the feeding structure is determined by the on/off operation of the PIN diode that inserted into the side of one of the lines of the Y-shaped feeding structure. For the proposed reconfigurable antenna, the two microstrip lines of the feeding structure have the same length when the PIN diode operates in the on state, and the antenna exhibits linear polarization(LP). On the other hand, when the PIN diode operates in the off state, the length of one side line of the feeding structure is relatively shorter than that of the other line. Therefore, the antenna exhibits circular polarization(CP). From the measurement results, it is found that the proposed antenna exhibits good impedance matching and axial ratio. In addition, polarization switching can be easily achieved in the same operating band.
Keywords
Reconfigurable Antenna; Reconfigurable Structure; Patch Antenna;
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