Abstract
The design and fabrication of a coupler with three reconfigurable output ports have been proposed. The output ports of the proposed coupler can be adjusted by varying the number of shorting pins. An antenna with a reconfigurable beamwidth has been also involved in this paper. The proposed antenna has a coupler and a 1 × 3 array rectangular patch. The beamwidth is set by the number of output ports. The simulation and experiment show the verification of the proposed coupler and beamwidth variation of array antenna. The broadest measured beamwidth was 66.2° and the sharpest measured beamwidth was 24.1°.
Highlights
Many wireless communication devices have been produced with the growth and development of the information industry
This paper presents a novel antenna with a triple-mode beamwidth using a 1 × 3 array
The proposed coupler can adjust the number of output ports by using shorting pins
Summary
Many wireless communication devices have been produced with the growth and development of the information industry. The technology for detecting the position of a vehicle using radiofrequency identification (RFID) has utilized a reconfigurable beamwidth antenna [1]. The beamwidth of the antenna can be reconfigured using a branch hybrid coupler, due to the triple mode of the antenna. A ratrace coupler was utilized in [9, 10] by adjusting the impedance of even- and odd-mode, while the power divider was used in [11] by optimizing the line width. They worked very well, but the output port is two-way. The proposed system was simulated using a twodimensional (2D) electromagnetic (EM) simulator (ANSYS Designer)
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