An Omnidirectional Dual-Band Printed Antenna with High Gain for WLAN Applications

To satisfy the demands for small, light, low-cost Wi-Fi antennas, an omnidirectional dual-band printed antenna based on a router circuit board is proposed in this paper. The dual-band antenna has high gain and a low profile, and can cover the entire WLAN band. The overall dimensions of the proposed antenna are 170mm×110mm×10mm, and the size of the radiators is 110mm×41mm×10mm. The bandwidth of the antenna below -10dB covers 2.4-2.5GHz and 5-6GHz. The gain can reach 3.5dBi at 2.4GHz, 5.9dBi at 5.2GHz, and 5.4dBi at 5.8GHz. The proposed dual-band antenna can be used in high-gain router applications and various wireless communication systems.