Reduced size folded slot antennas with capacitive loading

Folded slot antennas utilizing capacitive loading to reduce the physical size of the antenna while maintaining the original resonant frequency have been presented. Simulations illustrate that to decrease the size of the antenna the width of the radiating slot must also decrease, which limits the ability to fabricate this type of antenna. Also, as the size of the antenna decreases, the value of capacitor needed increases. Size reductions of 33 and 44% at 3 and 5 GHz, respectively, are demonstrated. The 10 dB BW and gain decrease as the size of the antennas increase.