Abstract
In this article, a novel on-glass antenna which is transparent, miniaturized, and multiband is presented. First, the antenna achieves more than 80% transparency. This is realized by removing as much as possible the metal pattern, without compromising the operational electric current flow. Second, the antenna is electrically small, $0.13\lambda \times 0.19\lambda $ at 0.95 GHz. This is realized by choosing a proper topology for the remaining metal pattern. Third, the antenna is triple band, covering the ranges 0.88–1.03 GHz, 1.47–2.74 GHz, and 3.32–5.97 GHz. The radiation is omnidirectional in all bands, which is suitable for GSM900/1800, 3G, 4G, 5G (2.55–2.65 GHz), WLAN (2.4/5.2/5.8 GHz), and WiMAX (2.5/5.5 GHz). The maximum gain in the three bands is equal to −0.18, 3.66, and 4.35 dBi with corresponding radiation efficiencies of 66%, 87%, and 88%. A prototype is made by first printing a metallic circuit on a thin FR-4 substrate and then gluing it on a glass substrate. The measurement results are in good agreement with simulations.
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