Wide-band microstrip patch antenna design for LMDS band

There has been a constant effort to study methods for increasing the bandwidth of microstrip antennas. In this paper, we propose a special type of the external rectangular patch, for the design and analysis of an antenna using a local multipoint distribution system (LMDS). We minimized electromagnetic emissions from the fringing effect. As a result, we obtained an increase in antenna efficiency and frequency bandwidth. We were also able to design the wideband antenna easily, because of the difference in parameter between the aimed and the simulated antenna was reduced greatly. In comparison with the rectangular patch antenna, the banded one has a wider bandwidth. We set the operation frequency bandwidth from 24.5 GHz to 28.5 GHz on the basis of the operation frequency band at VSWR 2.0, and used a Teflon substrate with relative dielectric ratio is 2.6.