Abstract In this paper, two models are developed based on artificial intelligence which can be used to estimate the length, width and position of the radiating element which are the design parameters of square monopole antenna required to make it operate in a particular frequency band of 4.5 GHz and 8.9 GHz. All the antennas designed using these models gives a wideband of 4.5GHz -5 GHz. One of the two models were developed using Artificial neural network (ANN