Hexagonal fractal ultra‐wideband antenna using Koch geometry with bandwidth enhancement

Abstract

In this study, a design approach to achieve multiresonance phenomena in ultra‐wideband (UWB) bandwidth using fractal geometry is investigated. The introduction of Koch fractal geometry in monopole as well as in the ground plane of the antenna generates additional resonances, which helps to achieve entire UWB operational bandwidth. Therefore the bandwidth is increased up to 122%. Moreover, the fractal nature of the antenna also facilitates to obtain the stable radiation pattern. The compact dimension 31 mm × 28 mm of the antenna exhibits nearly omnidirectional radiation pattern, with good reflection coefficient over the entire UWB frequency range. The proposed prototype is fabricated and its measured results are in good agreement with the simulated one. The time‐domain analysis of the antenna is performed and it is found that fidelity factor is better than 0.81, which shows good pulse preserving capability of the antenna.

Wideband High Gain Fractal Antenna for Wireless Applications

“…The comparisons of presented design in this paper inspired by [22], along with two closely relevant antennas presented in [13] and [1] are tabulated in Table 2. It is observed that our proposed antenna has enhanced bandwidth compared to other antennas presented in literature, while antenna gain is at par with other presented designs.…”

“…This research focuses on the design of ultra-wide and multi-band antennas with high values of gain. A wide-band antenna has its own advantages such as low transmission power, high data rate, high performance in multipath channel, and resistance to jamming which can be satisfied using fractal antenna geometry [1]. Antenna is a transducer employed to transmit or receive electromagnetic waves and is a transitional structure used between free space and energy guiding device.…”

Design of a miniaturized planar half elliptical ultra‐wideband dipole using a concaved arm

“…In particular, miniaturized ultra‐wideband (UWB) antennas are highly desired in space‐limited applications such as body‐centric wireless communications, wireless universal serial bus, and biomedical implants . Several miniaturization approaches have been proposed to realize small UWB antennas . For instance, a compact hexagonal fractal planar UWB antenna was presented in Reference .…”

“…Several miniaturization approaches have been proposed to realize small UWB antennas . For instance, a compact hexagonal fractal planar UWB antenna was presented in Reference . By using the Koch fractal geometry in both the monopole and the ground plane, a large S11 bandwidth of 3.4 to 13 GHz is achieved with a compact electrical size of 0.35 λ × 0.32 λ at the lowest operating frequency.…”

A novel UHF Minkowski fractal antenna for partial discharge detection

“…The application of fractal technique in antenna design can offer desired miniaturization and multiband phenomena due to its space‐filling and self‐similar properties . The space‐filling property is able to prolong the effective current path, resulting in the decrease of resonant frequency, and the self‐similarity helps to produce multiple resonant frequencies.…”