Circularly Polarized (CP) Wideband on Fabric (Textile) Stealth MIMO Antenna for Wearable Wireless UWB Applications

Stealth wearable wireless devices gained popularity in the personal security and fashion design industry. A multiple-input-output (MIMO) wideband circularly polarized textile is described in the present paper, where a wearable application uses a multiple-input-output (M.I.M.O). It consists of two MIMO antennas, the resonating elements are shaped like a peacock, and the ground plane is similar to a beautiful peacock. A voltage is applied to each antenna element; the ground plane contains a a Peacock-shaped small strip antenna used for circular polarizing. The antenna covers 3dB Axial Ratio Band-Width (A.R.B.W.) of 5.0–7.0 GHz and impedance bandwidth (S11 ≤ −10.5 dB) of 3.7–13.5 GHz. The improved fabric-textile Multple-input-multiple-output antenna showing Channel-Capacity-Loss about (C.C.L) <0.20 bits/sec/Hz, & Envelope-Correlation-Coefficient (E.C.C) less than 0.021, Total Active-Reflective-Coefficient (T.A.R.C) close to -10.4 dB , DiversityGain (D.G) close to 9.96, Mean-Effective-Gain (M.E.G) ratio close to ±0.5 dB . A Specific-Absorption-Rate(S.A.R) of the proposed antenna for tissues of human specimens is also discussed for different situations pertaining to the human body. The final dimention of the presented Circularly-Polarized textile wearable Multple-input-multiple-output antenna is 34:5×41×1.1mm3. The proposed antenna can make unrecognizable because of the beautiful peacock design that can easily mix with the designs of fabric.