Design and performance analysis of a conformal CPW fed wideband antenna with Mu-Negative metamaterial for wearable applications

Abstract

In this paper, a flexible CPW fed ultrawide band (UWB) antenna with mu-negative (MNG) metamaterial is designed, fabricated, and tested for wearable applications. Initially, a UWB antenna of size 50 mm × 43 mm is fabricated on two different substrates, viz. flexible FR4 and semi-flexible Rogers RT/duroid 5880. A metamaterial structure fabricated on flexible FR4 shows a magnetic resonance from 7.2 GHz to 9.2 GHz with maximum stop band attenuation (−49 dB) and high MNG value (−2121.6) at 7.87 GHz. Then a (3 × 3) array of designed MNG metasurface is used as ground plane with flexible UWB antenna, which improves its overall gain and radiation pattern. The performance of the flexible antenna with/without metamaterial at various distances from flat and cylindrical three-layered human phantom of skin, fat, and muscle is studied. Further, the bending characteristics at different angles and performance over thin metallic sheet is also evaluated. Additionally, the peak specific absorption rate value averaged over 1 g of tissue at three chosen frequencies from UWB range (3, 5, 10 GHz) with/without metamaterial using 0.3 and 0.1 W of input power is also analyzed. The simulated and measured results are in good agreement which confirms that the designed antenna is a good candidate for wearable applications.

A compact flexible textile artificial magnetic conductor-based wearable monopole antenna for low specific absorption rate wrist applications

“…Performance wise against the human hand-wrist, the proposed integrated design displayed a high realized gain while falling second to [25]. In terms of efficiency, it is near to [2], but lower than [25]. Furthermore, with the same input power of 100 mW, the proposed integrated design achieved a very low SAR value, but falling second compared with [2].…”

“…This proves its compactness and flexibility required for such an application. Performance wise against the human hand-wrist, the proposed integrated design displayed a high realized gain while falling second to [25]. In terms of efficiency, it is near to [2], but lower than [25].…”

“…To attain high gain, as well as low SAR, simultaneously, when assessing the antenna performance within the vicinity of the human body, artificial magnetic conductor structures (AMCs), often termed electromagnetic band gap or high impedance surface (HIS), have been heavily relied on [2, 8–11, 16–20, 22–25]. Another approach is to simply utilize a large ground plane [13, 26, 27].…”

Meta-Wearable Antennas—A Review of Metamaterial Based Antennas in Wireless Body Area Networks

“…Through analyzing the metasurface antenna design have proposed in literature. The conventional method is that the near-zero reflection phase of the unit cell is set at around the resonance frequency by controlling the topologies of the AMC unit cells [ 20 , 61 , 64 , 65 , 83 , 84 ], which is also the main way to design a metasurface wearable antenn.…”

Design & Simulation of Microstrip Patch Antenna for Uwb Applications

“…there are various states of repair like roundabout, square, triangular but roundabout and square are commonly mainstream. As of past due there has been exquisite exertion in the radio twine software to stifle the surface wave and beat the regulations of the antenna.the incentive within the again of this paper is to endorse a microstrip recieving wire a good way to boom the information transfer functionality with out increasing its bodily measurements [1]- [3].however, in sure programs the little size ordinary repair reception equipment is still excessively massive, so research is as but being centered across the cutting down of the restore reception apparatus in some unspecified time in the future of the years. on this paper, restore radio twine structure with minimum duration is one noteworthy idea.…”