Design and Analysis of Inverted F-shaped Slotted Patch Multiband Microstrip Antenna for S, C, X, and Ku Band Applications

This paper looks into a brand-new multiband microstrip antenna design. The designed antenna can operate at 8 different frequencies between 2.5 GHz and 14.0 GHz. An inverted F-shaped slot is added to the radiating patch to create multi-band frequencies. Initially different patch sizes, substrate material, and different shaped slots are investigated for creating multiband and also improving antenna performance. An FR4 dielectric substrate is used whose relative permittivity is 4.4 and thermal conductivity is 0.3[W/K/m]. A microstrip line is also used for feeding. The resonant frequencies of 8 bands are 2.9 GHz, 5.05 GHz, 5.8 GHz, 8.5 GHz, 9.5 GHz, 10.9 GHz, 12.8 GHz, and 13.5 GHz with the reflected power of -16.3 dB, -14.9 dB, -16.7 dB, -14.6 dB, -10.9 dB, -18.6 dB, -11.1 dB, and -20.9 dB respectively. The acquired bandwidth is satisfactory and the VSWR is improved, being less than 2. This antenna is designed for S, C, X, and Ku band applications so it can be used for many purposes. CST Studio Suite software is used to design all the simulation results.