Compact wideband and dual‐band antenna for TD‐LTE and WLAN applications

A novel compact wideband and dual‐band microstrip‐fed antenna is proposed. By using symmetrical inverted‐L‐shaped strips, a fork‐shaped strip, a rectangular slot and a defected ground plane, the dual‐band resonances of the antenna are generated. The measured impedance bandwidths are 1.12 GHz for the lower frequency band (1.87–2.99 GHz), and 780 MHz for the higher frequency band (5.10–5.88 GHz). The fabricated antenna can be used to cover the entire required bands for time‐division‐long‐term evolution (1880–2655 MHz) and wireless local area network 802.11 a/b/g (2.4–2.4835, 5.15–5.875 GHz). The measured gain at 2.4 and 5.5 GHz is 2.1 and 6.1 dBi, respectively. The antenna shows a compact size of 25 × 30 × 0.8 mm. The details of the antenna design, the operation mechanism and the simulated and measured results are presented.