Low-profile dual-band monopole antenna with EBG array for LTE, WLAN, Wi-MAX, and ISM band applications

This paper presents a dual-band printed monopole antenna backed with an electromagnetic band-gap (EBG) array for LTE, WLAN, Wi-MAX, and ISM band applications. The antenna is comprised of a T-shaped monopole, 50 Ω microstrip feed line, and a rectangular-shaped partial ground plane. The printed monopole antenna is supported by a 6 × 6 array of EBG unit cells, with each unit cell composed of square and circular rings, resulting in a wide impedance bandwidth and improved gain. The EBG-backed printed monopole antenna with partial ground plane offers an impedance bandwidth of 57.8% (1.6–2.9 GHz) and a maximum radiation efficiency of 95.4% with a peak gain of 6.9 dB in the first band, and an impedance bandwidth of 53.24% (3.39–5.85 GHz) and a maximum radiation efficiency of 95.2% with a peak gain of 8.7 dB in the second band. The proposed monopole antenna design is miniaturised, has less design complexity, and does not require vias for EBG realisation.