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http://dx.doi.org/10.5515/KJKIEES.2010.21.1.046

A Reconfigurable Circularly Polarized Microstrip Antenna on a Cross-Shape Slotted Ground  

Yoon, Won-Sang (Communication R&D Center, Samsung Thales)
Han, Sang-Min (Department of Information and Communication Engineering, Soonchunhyang University)
Lee, Dong-Hyo (Department of Radio Communication Engineering, Korea University)
Lee, Kyoung-Joo (Department of Radio Communication Engineering, Korea University)
Pyo, Seong-Min (Department of Radio Communication Engineering, Korea University)
Kim, Young-Sik (Department of Radio Communication Engineering, Korea University)
Publication Information
The Journal of Korean Institute of Electromagnetic Engineering and Science / v.21, no.1, 2010 , pp. 46-52 More about this Journal
Abstract
A compact circular microstrip patch antenna with a switchable circular polarization(CP) is proposed at 2.4 GHz. An unequal cross-shaped slot on a ground plane is utilized as a perturbation. By switching pin diodes mounted on the slot, the CP sense of each antenna can be simply switched from left-handed(LH) CP to right-handed(RH) CP vice versa. Since the perturbation can be made on the ground plane and no bias circuit is required on the patch side, the bias circuit has not effect on the main beam radiation. From the experimental results, the impedance bandwidth and CP bandwidth of the proposed antenna have shown up to 150 MHz and 35 MHz, respectively. The peak gain of the proposed antenna is 1.7 dBi for both CP senses.
Keywords
Microstrip Patch Antennas; Circular Polarization; Reconfigurable Antennas; Cross-shape Slots; Pin Diodes;
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