An octagonal star shaped flexible UWB antenna with band-notched characteristics for WLAN applications

Abstract

In this paper, a flexible UWB antenna with band notched characteristics for high speed WLAN applications is presented. The flexibility of the designed antenna is achieved by developing the antenna on a flexible Teflon substrate. The proposed antenna primarily consists of a slot loaded octagonal star-shaped patch with a partial ground plane for wide operating bandwidth. A split ring resonator (SRR) based stop band filter is embedded in the ground plane to realize a rejection band characteristic to mitigate the interference impact from wireless local area network (WLAN) IEEE802.11n (5.725-5.825 GHz) band. The measured result shows that the suggested antenna operates over 3.25 to 13 GHz with a fractional bandwidth of about 120% with a peak gain of 6.7 dBi. The measurement results also confirm the presence of the rejection band from 5.7-6.2 GHz. Also, in terms of flexibility, the antenna provides high robustness in the performance for different types of bending conditions. The obtained results depict that the proposed antenna is suitable for mounting on all types of surface area with band rejection characteristics.

A compact flexible fractal ultra‐wideband antenna with band notch characteristic

“…In addition, none of the antennas in References 3, 10–12, 15–18, 23–26 and 35 are flexible, which makes these antennas unable to bend. Although the antennas in References 36–38 have flexibility, they use a more common slot shape to achieve band rejection, and are larger in size and narrower in bandwidth than the antenna proposed in this paper. In summary, the proposed antenna has good flexibility due to its preparation on a flexible substrate, and achieves small size, large bandwidth, and anti‐interference characteristics through the combination of novel fractal and notch structures.…”

“…In addition, there are ways, such as using parasitic elements and electromagnetic bandgap structures, to achieve band rejection 27‐35 . In recent studies, some flexible band‐notched UWB antennas have been proposed 36‐38 . However, the design of the previous miniaturized band‐notched UWB antenna still mainly uses rigid materials, such as FR4, as the dielectric substrate.…”

ON-OFF Body Ultra-Wideband (UWB) Antenna for Wireless Body Area Networks (WBAN): A Review

“…Research and production of versatile or foldable antennas in wireless technology are growing owing to their various benefits such as easy to install, highly robust, stretchable, corrosion-resistant, etc. In the scope of band-notched flexible UWB antennas, a band-notched flexible UWB antenna with a rejection band for high-speed WLAN applications is presented by Lakrit et al [40]. The proposed monopole antenna was built on a thin, portable compatible substrate material of thick Teflon sheet with εr = 2.08, δ = 0.001 and h = 0.6 mm and antenna dimension (42.5 × 30 × 0.6) mm 3 (see figure 8).…”

“…Section III concentrates on (ON-Body) communication antenna analysis and applications [70]- [86]. On the other hand, the paper classified and considered the operating frequency bands standard by 802.15 family and Federal Communications Commission (FCC) [32] UWB for OFF-Body based monopole [33], [34], [36], [40], [42]- [44], [47]- [49], [52], [54], [55], ground plane [57], [58], [63], [68] and ON-Body antennas [71], [74]- [77], [79], [81], [84]- [86]. Finally, the conclusion of the whole article is presented in section IV.…”

Wearable Textile Patch Antenna: Challenges and Future Directions

“…Textile-based antennas are especially reliant on fabric while in development. To produce a high-performance antenna system the fabric must be lightweight and pourable [13], [14]. At the time of design it was ensured that the radiator would not cause injury to the body tissue [15].…”