Design of a broadband smart antenna / Nur Illyana Ali

The purpose of this project is to design, simulate and fabricate a broadband microstrip smart antenna. The smart antenna is a combination of seven element log periodic antenna with two bandpass filters that operate at microwave frequencies. The log periodic antenna provides a wideband of 700 MHz. The filters operate at the best value of 5.3 GHz and 5.74 GHz given the value of return loss at these frequencies -24.43 dB and -27.864 dB meanwhile Voltage Standing Wave Ratio (VSWR) values at these two points are 1. 112 and 1.224 respectively. The bandpass filters cover 10% of the bandwidth. The microstrip antenna was designed and simulated using GENESYS and measured using Scalar Network Analyzer (SNA). In this design, RT Duroid has been used as a substrate with 0.5 mm height, relative dielectric constant, Er = 2.33 and dielectric loss tangent of 0.001. The measurement results agree well with the results of simulation.