Abstract
This work presents the design and fabrication of a novel uniplanar microstrip patch antenna that is simultaneously dual-band and dual-polarized. By embedding a carefully designed metamaterial-based electromagnetic bandgap structure (MTM-EBG) into the edges of a conventional square patch, operation with orthogonal linear polarizations at both 3.6 and 5.8 GHz is achieved. The design is fully printed, compact, low-profile, and pin-fed using a shielded microstrip configuration, and it is 17% smaller than a conventional square patch at the lower operating frequency. The presented antenna shows a reflection coefficient better than -16 dB at each frequency and over 24 dB of port-to-port isolation. Radiation patterns are patch-like in both operating bands, with broadside gains of 6.4 and 5.3 dBi at the lower and higher operating frequencies, respectively. The antenna is fabricated using conventional PCB manufacturing methods, and measurement results are in very good agreement with simulations.
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