Flexible UWB organic antenna for wearable technologies application

Abstract

New generations of printed flexible antennas are playing an important role in wireless communication systems. The ultra wide band and wearable possibilities are critical aspects of these kinds of antennas. In this study, the proposed antenna is an elliptical monopole fed by a coplanar waveguide; it uses a kapton substrate and it is optimised to work from 1 to 8 GHz. In the case of copper, a conductive nanocomposite material based on a polymer (polyaniline: PANI) and charged by multiwalled carbon nanotubes (MWCNTs) is exploited. The flexibility of both the kapton substrate and the nanocomposite (PANI/MWCNTs) provides the ability to crumple the antenna paving the way to potential applications for body‐worn wireless communications systems. In this study, the performance of the antenna is investigated in terms of return loss, radiation patterns and gain for both crumpled and uncrumpled antennas. The results confirm that performance remains at a good level when the antenna is crumpled.

Ultra-Wide Band Microstrip Patch Antenna for C and X -Band Applications with Effect of Copper Thickness

“…The miniaturized rectangular structured microstrip patch antenna is depicted in Fig.1 which is designed on FR4 with dielectric constant of 4.4, loss tangent of 0.2 and the total dimension of antenna is (10×17×1.6) mm 3 .The size of the antenna is clearly shown in Table-II. The proposed structure is fed by microstrip line feed of 50Ω SMA connector and on the ground plane and etched with a partial defected ground structure.…”

“…1 where simulated and fabricated top view and the bottom view are well illustrated. The volume of the proposed antenna is 272 mm 3 and the overall volume of the radiating patch is 2.95mm 3 (8.45×10×0.035) mm 3 . The comparative analysis of proposed antenna is done based on copper thickness i.e.…”

“…To overcome multiple utilization of different service in a single device multiple band, wide band and ultrawide band are huge interest for the researchers and many such designs have been made to achieve the requirements. According to the Federal Communication Commission (FCC) approves, if the impedance bandwidth of an antenna is above 20%; it will be considered as UWB [3][4]. The aim of researchers is to design the UWB antenna for band rejection characteristics and eliminating interference from narrowband wireless applications.…”

Flexible CPW fed transparent antenna for WLAN and sub‐6 GHz 5G applications

“…[4][5][6][7] Flexible antennas owing to its ease of integration in nonplanar surfaces along with its wide range of applications in flexible electronics and wearable devices have attracted a lot of researchers to work in this domain. Various wideband flexible antennas using inkjet printing, FR4, natural rubber, paper, Kapton polyimide, Rogers 6010, poly 3, 4-ethylene dioxythiophene are proposed for wearable, 8,9 WBAN, 10 5G, 11 IoT devices, 12 implantable devices, 13 organic wearable technologies, 14 flexible electronics, 15 and 4G LTE 16 applications. Researchers further implemented antennas which are transparent as well flexible to save the board space while maintaining the aesthetics with no visual clutter.…”

Flexible EBG‐backed PIFA based on conductive textile and PDMS for wearable applications

“…However, both denim and felt have low dielectric constants, which results in bulky volume and high profile. The kapton used in Reference is a typical material to fabricate the substrate for its flexibility and ultra‐thinness, while it suffers from a complex fabrication process and high costs. By contrast, PDMS, introduced in References , is a type of material that has advantages such as low cost, high flexibility, and easy realization, which means that it is an appropriate choice of substrate to design the wearable antenna.…”