Dual-Band Microstrip Patch Antenna with Switchable Orthogonal Linear Polarizations

• Main Authors: Jeongin Kim, Youngje Sung
• Format: Article
• Language: English
• Published: The Korean Institute of Electromagnetic Engineering and Science 2018-10-01
• Series: Journal of the Korean Institute of Electromagnetic Engineering and Science
• Subjects: Dual-Band Reconfigurable Antenna; Polarization-Reconfigurable Antenna; Switchable Orthogonal Linear Polarizations
• Online Access: http://jees.kr/upload/pdf/jees-2018-18-4-215.pdf

This study presents a dual-band polarization-reconfigurable antenna that comprises a large square patch with a pair of corner-cut edges and two small square patches with a shorting via. Two PIN diodes are located between the large square patch and two small square patches. Depending on the bias state applied to the two PIN diodes, each small patch may be disconnected or connected to the large square patch. As a result, the proposed antenna can provide polarization reconfigurability between two orthogonal linear polarizations. Further, the proposed antenna operates at 2.51 GHz and 2.71 GHz. From the measured results, the proposed antenna shows a 10 dB bandwidth of 2.39% (2.49–2.55 GHz) and 2.58% (2.68–2.75 GHz). In this work, the frequency ratio can be easily controlled by changing the size of the small patch.