Dual-band Sierpinski fractal monopole antenna

Abstract

-A new top-loaded reduced-sized dual-band monopole antenna for wireless communications is presented. The antenna provides better than -15 dB input return loss and keeps the same radiation pattern over both bands. In addition, a low-profile performance is achieved.

Advances in loading techniques to design multifrequency monopole antennas

“…The origins of the presented novel technique can be found in [9], where a modified Sierpinski gasket was top-loaded with a pseudo-triangular loop element so as to reduce the antenna size, as compared to the Sierpinski gasket monopole [10 -12]. As a result of that work, several top-loading schemes based on different structures were analyzed and characterized.…”

Novel combined MOD‐P multiband antenna structures inspired by fractal geometries

“…However, since the spacing between bands is closely linked to its self-similar structure, the spacing between bands is fixed at 2 [2]. Alternatively, top-loading can be added to the Sierpinski monopole in order to control the spacing between bands and the input impedance at the lower resonances of the antenna [3]. In addition, by modifying the Sierpinski monopole flare angle, the antenna pattern at the different resonances can be tailored, as described in [4].…”

“…Recently, an intensive study of the propagation of electromagnetic waves in media with negative permittivity and permeability has been presented in the literature [1][2][3][4][5][6]. Some unique properties, such as a negative index of refraction, supporting backward waves, and so forth, have been shown.…”

“…Some unique properties, such as a negative index of refraction, supporting backward waves, and so forth, have been shown. In [3,5,6], waves in metamaterial slabs were studied and in [4], slabs of single negative metamaterials in parallel-plate waveguides are examined. At the same time, the methods of realizing these materials are also examined and demonstrated [7][8][9].…”

Size Reduction of Microstrip Antenna with Fractal Ground Plane

“…Since the pioneering work of Mandelbrot and others, a wide verity of application for fractals continue to be found in many branch of science and engineering. One such area is fractal electrodynamics [2][3][4][5] in which fractal geometry is combined electromagnetic theory for purpose of investigating a new class of radiation, propagation and scattering problems.…”