Design a 3.5 slot antenna using coplanar waveguide (CPW) for dual band application

The proposed antenna is designed to overcome the demand in dual band issues. The basic shape structures of antenna are designed at frequency 2.4 GHz based on radiating structure 5 and 5.2 GHz based on radiating structure 3. Then, the changes on the position of radiating structure 3 have been carried out to investigate the effect for dual band. The coplanar waveguide technique is used to design the basic structure 3.5 antenna to achieve dual band resonant frequencies. Then, the position of the radiating structure 3 is turned to 90° so that the resonant frequencies can achieve at 2.4 GHz and 5.2 GHz. The results from the simulations were then validated with experimental measurements of a prototype that has been fabricated. The return loss for both resonant frequencies are less than -10 dB where 90% of the input signal is transmitted and only 10% of the input signal is reflected back.