A Dual Band Dipole Antenna for WiFi Applications

This paper presents a dual band dipole antenna. The antenna is proposed for 2.45 & 5 GHz WiFi system. The 4NEC2 simulator is used to analyze the proposed antenna. Basically, the dipole is designed at lower frequency band (2.4 - 2.5 GHz). Also, the upper frequency band (5.15 - 5.85 GHz) can be achieved by adding the parasitic wires coupled to the dipole. The simulated results of S
₁₁
show that the dual band resonant frequency can be obtained. The radiation patterns are also simulated. Gains of the antenna are higher than 2 and 5 dBi at lower and upper frequency bands, respectively. Then, the antenna is fabricated and tested to confirm the simulation. The measured results are consistent with the simulated ones.