Abstract
A compact dual-band antenna is presented for sub-6 GHz (3.4-4.2 GHz) and mm-wave (26-29 GHz) 5G applications. To realize this extremely large frequency ratio, a printed dipole is fed by a modified balun structure which consists of a tapered slot and microstrip feeding line. The single feeding line is deliberately designed and optimized to excite both of the dipole and tapered slot. The dipole antenna resonates at 3.6 GHz, while the tapered slot antenna works as a high-directive antenna at 28 GHz. The integration of two radiators, i.e. dipole at sub-6 GHz and tapered slot at mm-wave 5G, into one structure significantly reduces the total antenna footprint and hence, makes the design suitable for multi-standard smart wireless terminals.
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