On the Use of U-Slots in the Design of Dual-and Triple-Band Patch Antennas

IEEE Antennas and Propagation Magazine (Impact Factor: 1.32). 07/2011; 53(3):60 - 74. DOI: 10.1109/MAP.2011.6028422
Source: IEEE Xplore


The general method of using U-slots to design dual- and triple-band patch antennas is described. In this approach, one starts with a broadband patch antenna, which can consist of one or more patches. When a U-slot is cut in one of the patches, a notch is introduced into the matching band, and the antenna becomes a dual-band antenna. If another U-slot is cut in the same patch or in another patch, a triple-band antenna results. This method is applied to the L-probe-fed patch, the M-probe-fed patch, as well as the coaxially fed and aperture-coupled stacked patches. It is found that the patterns and gains of the dual-and triple-band antennas are similar to those of the original broadband antenna. Because the band notches introduced by the U-slots occur within the bandwidth of the antenna without slots, this method is suitable when the frequency ratios of the adjacent bands are small, usually less than 1.5.

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    • "such as using air substrate or cavity backed patches to raise antenna gain [6] [7] [8], using parasitic patches [9] or U-shaped slots embedded on the patch [10] to expand the bandwidth, and employing metamaterial [11] or multilayer substrates [12] to increase the radiation efficiency, to name just a few. Other types of elements employed for mobile satellite applications include printed dipoles [13] [14] [15], the quasi-Yagi [16], the Vivaldi antenna [17], the dielectric resonator antenna (DRA) [18], the comb-line antenna [19], the curl antenna [20] and the spiral antenna [21]. "
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    IEEE Antennas and Propagation Magazine 12/2012; 54(6):256-268. DOI:10.1109/MAP.2012.6387841 · 1.32 Impact Factor
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    Progress In Electromagnetics Research Symposium, PIERS 2012 in Kuala Lumpur; 01/2012
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