Abstract: This paper discusses a stacked fractal microstrip antenna in which both the fed patch and the parasitical patch are fractal with Minkowski islands. The effects of the fractal indentation width and the iterative generations on the antenna performance are analysized. A test fractal microstrip antenna is made and the measurement shows good agreement between the numerical calculations and the experimental results. The new design is much smaller in size than a convention rectangular patch antenna. Moreover, it has a medium bandwidth and 2D symmetry, suitable for dual-polarized antenna applications.

Key words: microstrip antenna, fractal, return loss, bandwidth, miniaturization