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http://dx.doi.org/10.5515/KJKIEES.2010.21.9.1050

K-Band Array Patch Antenna Having Unequal Input Impedance  

Kim, In-Ho (Department of Electronic Information and Communication, Hongik University)
Lee, Jeong-Hae (Department of Electronic Information and Communication, Hongik University)
Publication Information
The Journal of Korean Institute of Electromagnetic Engineering and Science / v.21, no.9, 2010 , pp. 1050-1055 More about this Journal
Abstract
In this paper, the K band $3{\times}6$ array antenna having unequal input is presented. To control the input impedance of the patch antenna, the length of inset feed is adjusted. Also, the same current in each element is excited by Kirchhoff's law. The proposed unequal impedance array antenna is a nonuniform amplitude array. The bandwidth of the proposed unequal impedance array antenna is wider by 1.5 times than that of the equal array antenna. This broad bandwidth is thought to be due to multiple resonances of patches. The unequal impedance array antennas have fractional bandwidths of 5.07 % and gains of 18.32 dBi.
Keywords
K Band; Inset Feed; Unequal Impedance Array Antenna; Broad Bandwidth; Multiple Resonances;
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