Presentation Title

Dual-band, Electrically Small, Parasititc Array Antenna for Wireless Communication Systems

Location

Nessmith-Lane Atrium

Session Format

Poster Presentation

Research Area Topic:

Engineering and Material Sciences - Electrical

Abstract

Nowadays, to enhance user experience in both performance and convenience, most electronic devices are designed to be having more embedded functions while maintaining pocket sized. However, to avoid the interference and slow speed caused by simultaneous uses, each function is usually assigned to a separate band. Therefore, it is important to have an antenna that is dual-band or multi-band to cope with the multifunctional requirement. Besides, to keep the system small, electrically small antenna is also preferable due to its ability to fit in limited space.

A novel design of a parasitic array antenna that is dual-band and electrically small is proposed for modern wireless communication systems. The proposed antenna is designed, simulated, and optimized using FEKO in conjunction with MatLab. Once the optimized design is obtained, it will be fabricated using copper wires for conductivity. In addition, to eliminate the need for balun, the antenna will be fabricated in monopole version with ground plane size that is big enough to get rid of ground plane effect (1.5ëÈÌÑ1.5ëÈ). The parasitic structure is used in order to enhance the antenna gain for stronger signal transmission/reception. The proposed antenna consists of a folded driver and two twisted directors. The driver is folded into three arms to mitigate the effect of low radiation resistance caused by closed spacing between the driver and the directors. In the meantime, the directors are twisted to eliminate the radiation interference produced between them. The dual-band characteristic is achieved by varying stretched length of both directors. In final configuration, all antenna elements are folded into rectangular shape to further minimize the overall size of the antenna. As a result, the antenna generates a dual-band at 1.65 GHz and 1.75 GHz with the total volume of 18.0 mm (0.099ëÈ) ÌÑ 21.0 mm (0.116ëÈ) ÌÑ 21.4 mm (0.118ëÈ). This research is beneficial to wireless communication community for several reasons. First, it proposed a dual band, electrically small, and high gain antenna that is useful for modern applications which required portability. Second, the research proposed a general way to generate multi band antenna. It is concluded that the number of resonances are generated by the number of directors; therefore, multiband antenna can easily be achieved using the same methods simply by increasing the number of directors. Third, the resonant frequencies can be scaled based on the length of the directors which makes the antenna competent for all frequency bands.

Presentation Type and Release Option

Presentation (Open Access)

Start Date

4-16-2016 2:45 PM

End Date

4-16-2016 4:00 PM

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Apr 16th, 2:45 PM Apr 16th, 4:00 PM

Dual-band, Electrically Small, Parasititc Array Antenna for Wireless Communication Systems

Nessmith-Lane Atrium

Nowadays, to enhance user experience in both performance and convenience, most electronic devices are designed to be having more embedded functions while maintaining pocket sized. However, to avoid the interference and slow speed caused by simultaneous uses, each function is usually assigned to a separate band. Therefore, it is important to have an antenna that is dual-band or multi-band to cope with the multifunctional requirement. Besides, to keep the system small, electrically small antenna is also preferable due to its ability to fit in limited space.

A novel design of a parasitic array antenna that is dual-band and electrically small is proposed for modern wireless communication systems. The proposed antenna is designed, simulated, and optimized using FEKO in conjunction with MatLab. Once the optimized design is obtained, it will be fabricated using copper wires for conductivity. In addition, to eliminate the need for balun, the antenna will be fabricated in monopole version with ground plane size that is big enough to get rid of ground plane effect (1.5ëÈÌÑ1.5ëÈ). The parasitic structure is used in order to enhance the antenna gain for stronger signal transmission/reception. The proposed antenna consists of a folded driver and two twisted directors. The driver is folded into three arms to mitigate the effect of low radiation resistance caused by closed spacing between the driver and the directors. In the meantime, the directors are twisted to eliminate the radiation interference produced between them. The dual-band characteristic is achieved by varying stretched length of both directors. In final configuration, all antenna elements are folded into rectangular shape to further minimize the overall size of the antenna. As a result, the antenna generates a dual-band at 1.65 GHz and 1.75 GHz with the total volume of 18.0 mm (0.099ëÈ) ÌÑ 21.0 mm (0.116ëÈ) ÌÑ 21.4 mm (0.118ëÈ). This research is beneficial to wireless communication community for several reasons. First, it proposed a dual band, electrically small, and high gain antenna that is useful for modern applications which required portability. Second, the research proposed a general way to generate multi band antenna. It is concluded that the number of resonances are generated by the number of directors; therefore, multiband antenna can easily be achieved using the same methods simply by increasing the number of directors. Third, the resonant frequencies can be scaled based on the length of the directors which makes the antenna competent for all frequency bands.