Inward Fractal Dual Band High Gain Compact Antenna

This paper presents a microstrip antenna with nested two folds fractal shape. The fractal geometry of the patch has a slotted square boundary and spheres connected to its sides. The antenna was first optimized over a 5 x 5 cm
²
area, so that dual frequency operation is obtained at the IMT band and in the Radiolocation Service at 1.4 GHz and 3.2 GHz respectively. Applications include breast cancer detection in addition to a wide range of wireless devices due to the radiation pattern and directivity characteristics. The design size is further minimized targeting the ISM frequency of 2.45 GHz. A 4 x 5 cm
²
and 4 x 4 cm
²
design were successfully simulated with high 10 dB gain. Results of measurements coincide very well with simulations results.