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IEEE transactions on antennas and propagation v.65 no.1, 2017년, pp.380 - 384   SCI SCIE
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Miniaturized Dual-Band Folded Patch Antenna With Independent Band Control Utilizing an Interdigitated Slot Loading

Brocker, Donovan E. (Pennsylvania State University, University Park, PA, 16802, USA ); Jiang, Zhi Hao (Pennsylvania State University, University Park, PA, 16802, USA ); Gregory, Micah D. (Pennsylvania State University, University Park, PA, 16802, USA ); Werner, Douglas H. ( );
  • 초록  

    A compact linearly polarized dual-band patch antenna with low cross-polarization and independent band control is presented. Miniaturization was achieved through a combination of shorting, subsequently folding, and by replacing the standard slot loading with a slot that is featured by a meander line. By replacing the standard straight slot with an interdigitated slot loading, the resonance condition was shifted to the lower operating band, facilitating significant antenna miniaturization and resulting in an element size equal to or smaller than $0.1\lambda _{ {0}}$ in all three dimensions. The antenna design procedure is outlined and a prototype for WiFi applications was fabricated and measured for impedance matching, radiation pattern, and broadside gain. A simulated parametric analysis was performed on the interdigitated slot geometry to determine how the antenna performance is controlled. Then, based on the parametric analysis, it was further demonstrated that the two operational bands of the antenna element could be independently controlled by changing only the geometrical dimensions of the interdigitated slot, leaving the base of the antenna entirely unaltered. As a result, the lower operating band could be fixed while the upper operating band could be shifted by up to 10%. Lastly, the effect of utilizing a small ground plane, in an effort to achieve a small antenna footprint, is discussed.


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