A single feed planar antenna with 4G tunable bands and consistent upper LTE bands between 1.51 GHz–2.1 GHz

A compact single feed dual band meandered planar antenna with 4G tunable bands and 1.51 GHz to 2.10 GHz consistent bands is proposed here. In this antenna design, a varactor diode is implemented on the meandered arm to tune the operational frequency of the lower band between the 690 MHz to 960 MHz frequencies. Whilst the 4G band tuning, the rectangular-shaped cutout portion of the antenna provides a consistent frequency bandwidth of 1.51 GHz-2.15 GHz. Both the tunable and consistent frequencies show an acceptable matching based on S
₁₁
≤ -6dB criteria and near Omnidirectional radiation patterns. The antenna is able to cover several wireless (LTE) communication bands including 4G LTE bands.