A design and adjustment method for ultrawideband microstrip antenna design

This paper presents a combined theoretical and experimental design and adjustment method for ultra-wideband (UWB) microstrip antennas with new geometries on the radiofrequency printed circuit board (PCB) with the permittivity er=2.3 and the thickness h=1mm. The first theoretical design is made by using a standard 3D electromagnetic software package. The antenna specifications are measured and adjusted by the equipment Microwave Test Set IFR 6203B. The obtained antenna has the bandwidth of 600 MHz and very good impedance matching at the resonant frequency 7.2GHz (S11= -55.7dB). This method can reduce time for antenna design in the laboratory conditions. Using it with other initial antenna structures and adding other resonant strips, we can obtain other antennas with smaller dimensions on keeping their large bandwidth and small return loss.