Design of a Multi-Band Microstrip Slot Antenna with Bi Directional Radiation Pattern

In this work, a multiband antenna is designed using multiple resonators technique. The proposed antenna consists of conventional slot antenna loaded with multiple resonators and inherits a bi directional radiation pattern. Multiple resonant frequencies are generated with the help of multiple resonators (two C-shaped along with an E-shaped and two L-shaped resonators) and split ring resonators. The resonant peaks are obtained at nine different frequencies. The -10dB impedance bandwidth of the proposed antenna is 2.71-2.78 GHz, 3.51-3.63 GHz, 4.06-4.16 GHz, 5.28-5.43 GHz, 5.71-5.88 GHz, 6.59-6.76 GHz, 9.05-9.17 GHz, 9.34-9.49 GHz, 10.18-12.53 GHz.