Background & Objective: Partially grounded frequency reconfigurable antenna is discussed
in this paper. Antenna frequency cover is 4.2 GHz to 7 GHz and it has reconfigurable notchband
near 5 GHz frequency. Frequency rejection is achieved by using circular split-ring slots in radiating
element. The antenna can be reconfigured at 5.1 GHz, 5.4 GHz and 5.9 GHz by creating more
slots in outer most split-ring. Designed antennas are printed on FR-4, low-cost substrate having relative
permittivity of 4.4 and thickness of 1.6 mm.
Results & Conclusion: Simulation of antennas is carried out using High Frequency Structure Simulator
(HFSS) software. Designed antenna has omni directional radiation pattern. The prototype antennas
are fabricated and tested using network analyzer. Good matching is observed between simulated
and measured results.