Abstract
In this paper, an investigation is carried out to see how a single, rectangular shaped slot (cut) can be used to significantly improve the performance of a simple, impedance matched rectangular microstrip patch antenna operating in wireless local area network frequencies. Tests are also extended to show how this type of slot can be employed to achieve multi-band operation. The effects of different slot orientations are also examined. The proposed configurations are simulated using the HFSS software package, where return loss, input impedance (Z-parameter), and radiation patterns are used for the analysis of the different configurations. It is found that this type of patch modification can be used to exceed the performance of much more complex patch designs and to offer outstanding efficiency even at multiple resonant frequencies while generally maintaining the radiation properties of the original antenna it was implemented on and avoiding base frequency shifts, making using this slot much easier than other designs.
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