Carpet Fractal Antenna

Multiband antenna offers multiple telecommunication services in to single device.

Carpet fractal antenna.

Sierpinski carpet antenna based on fractal geometry are low profile antennas moderate gain and can be operated at multiband of frequencies leads to a multi functional structure. Very broadband and multiband frequency response that derives from the inherent properties of the fractal geometry of the antenna. This paper describes the design of modified sierpinski carpet fractal antenna which resonates at six frequencies 4 825 5 455 6 265 ghz and 6 805 8 02 and 9 145 ghz. Design and analysis of new geometry for microstrip patch sierpinski carpet fractal antenna is discussed.

Fractal antennas are simple light weight and compact in size. The model of the antenna is as shown in the figure 3. This is due to the self similarity in the geometry of the antenna. The resonant frequencies for fractal carpet with number of iterations two are shifted left when compared to the number of iterations equal to one.

Different performance parameters like radiation pattern gain voltage standing wave ratio return losses are observed at all the frequencies. Sierpinski carpet geometry based rectangular patch fractal antenna is described in this paper. This leads to design multiband fractal antenna for wireless communication systems. The antenna consists of a sierpinski carpet fractal radiator which reduces the overall size of the antenna and it is realized on top of a hilbert slot in the ground layer to achieve required impedance matching.

This antenna is designed upto first iteration. This type of wideband antenna displays high self similarity and symmetry. As shown in the figure initial design rectangular sierpinski carpet dimensions described abovefor patch is modeled. This fractal structure is implemented on square and several iterations are applied on initial shape.

Figure 2 shows the design of a sierpinski carpet fractal antenna starting with a rectangular geometry of single patch antenna. W 0 264 h l 0 412h w reff 0 258 0 8 h 4. Fractal technologies allowed us to design miniature antennas and integrate multiple telecommunication services such as cellular gsm 900 and gsm 1800 wireless lan gps and hiperlan into a single. The fractal carpet antenna is resonating at multiple frequencies.