Fractal monopole antenna for WLAN USB dongle
ABSTRACT This article presents the design and fabrication of a simple printed fractal monopole antenna for WLAN USB dongle applications. The proposed antenna uses the combination of meander line and fractal geometry, which is very simple and easy to fabricate, to achieve a multiband operation characteristic. The parameters of this antenna were optimized through numerical simulations in Ansoft HFSS, after which the antenna has been fabricated and characterized. The measurement results show that the proposed antenna has a -10 dB return loss bandwidth of 2.22 to 2.52 GHz and 5.03 to 5.84 GHz, which covers the entire required band for WLAN 802.11a/b/g standards. Moreover, from the simulation results, it is also observed that this proposed antenna exhibits constant gain of 1.8 dBi with 95% radiation efficiency in the lower band and 2.4 dBi with 94% radiation efficiency in the upper band, respectively.
Conference Proceeding: Fractal antenna applications in wireless telecommunications[show abstract] [hide abstract]
ABSTRACT: Applying fractals to antenna elements allows for smaller, resonant antennas which are multiband/broadband and may be optimized for gain. They do not use additional loading components and are simple and cost-effective to fabricate. They can be mounted to constraining form factors, such as the casing of hand-held transceivers. Fractal antennas prove worthwhile, high performance, resonant antennas for many practical applications. Usually fabricated as or on small circuit boards, they allow new versatility in their use with wireless devicesElectronics Industries Forum of New England, 1997. Professional Program Proceedings; 06/1997
Conference Proceeding: Fractal monopole antenna design Using Minkowski Island geometry[show abstract] [hide abstract]
ABSTRACT: In this paper, two printed multiband fractal monopole antennas using the 1st and 2nd iteration of Minkowski Island geometry are proposed for WLAN communications. The monopole antennas have compact size of 28 times 18 mm2 and 21.5 times 18 mm2, respectively. The proposed antennas with different sizes of the ground plane have also been studied through numerical simulations in Ansoft HFSS. It is found that without using any impedance matching method, both of the proposed antennas exhibit good impedance match at both 2.4 and 5.2 GHz band, which is confirmed by the measurement results. It is also observed that the monopole antenna with the geometry of the 1st iteration Minkowski Island can also operate at 3.5 and 5.8 GHz, which means that it almost covers the entire required frequency bands for 802.11a/b/g and WiMAX communications. The simulation shows that both antennas exhibit high radiation efficiency and the measured radiation patterns show that both antennas have similar radiation patterns at each resonant frequency.IEEE Antennas and Propagation Society International Symposium; 01/2009
Conference Proceeding: Miniature monopole antenna based on the fractal Hilbert curve[show abstract] [hide abstract]
ABSTRACT: A novel miniature antenna based on the fractal Hilbert geometry is presented. As the fractal iteration increases, the antenna becomes electrically smaller at a higher rate than any other fractal geometry presented up to now. Several fractal-shaped Hilbert monopoles have been constructed, measured and compared with the classical λ/4 monopole.Antennas and Propagation Society International Symposium, 2002. IEEE; 02/2002