Optimization Research And Design For Fractal Antenna

As the rapid development mobile of communication technology and Internet technology. Antenna with small shape and Antenna with wideband are applied more widely. Due to compact structure, beautiful appearance, and small volume weight, Microstrip antenna is adopted far and wide. However microstrip antenna has defects of low gain and narrow bandwidth.so the fractal technology is adopted to improve microstrip antenna,and make it better application in this paper.In recent years, the fractal structure antenna research mainly focus on Sierpinski unipolar son antenna, the enterprise Koch curve type unipolar son antenna, Sierpinski quadrate patch antennas, Sierpinski triangular patch antennas, tree fractal unipolar son antenna. Many experiments show that the fractal antenna generally has characteristics with multiple frequency and reduction of size.1) put forward a method of realizing the new scheme microstrip antenna miniaturization. This design with slot form for cost effective slot antenna reduced microstrip patch antennas are area. Application of this HFSS software simulation. The electromagnetic antenna The results show that the antenna to single-slit radiation, the wavelengths resonant antenna. Antenna with conventional microstrip antennas similar E face and H surface directed graph. Its gain less than double microstrip patch. Antenna structure is simple, easy to make, especially suitable for antenna scale demand is demanding portable communication equipment, etc.2) Aiming at the common 1:3:9 fractal antenna is unlikely to change much frequency characteristics, of second-order Sierpinski square patch antennas are analyzed improvement. Using Ansoft company simulation software production and analyzes a join cross-shaped groove Sierpinski quadrate aperture fractal antenna. Sierpinski square fractal antenna first-order patch antennas are mainly affect the performance, low patch mainly affect the second high performance. In Sierpinski of second-order patch square mat antenna on the slot, change its surface current flow, high frequency end characteristics of change, reduce the high frequency end center frequency, thus obtains a UHF band and microwave section based on the parting antenna. Through the analysis and the revision, the basic achieved high bandwidth requirements. Although not perfect, but also reflected a realization method of broad-spectral-bandwidth, to realize antenna miniaturization and wideband presents a new train of thought.