This paper presents the design and practical implementation of a wideband spring textile (WST) antenna for wearable communications. The antenna is designed on a felt substrate having a compact dimension of 32 × 42 × 3 mm 3 (0.38λ g × 0.5λ g × 0.036λ g ). This antenna operates in the 3.14 to 5.45 GHz frequency range, has a bandwidth (BW) of around 2306 MHz, and has a peak realized gain of 6 dBi at 3.5 GHz. Due to a broad frequency coverage, this antenna can be used in a wide range of wireless applications, including 5G and IoT. The proposed design is analyzed in terms of reflection coefficient, radiation pattern, efficiency, gain, and surface current. Using the same electromagnetic simulation software, both characteristic mode analysis (CMA) and the method of moments (MoM) are applied in the design process. The simulated results on a human chest phantom demonstrate the −10-dB impedance bandwidths of 1461 MHz. The antenna prototype is fabricated for verification, and the simulated and measured results demonstrate that the proposed antenna is suitable for wideband on-body applications given its low-profile implementation and mechanical flexibility.

The paper discusses the issue of creating a secure environment for information transmission in an association dependent on Noticeable Light Correspondence (VLC) innovation utilizing a Power Line Correspondence (PLC) modem. Throughout the examination, an investigation of homegrown and unfamiliar writing and patent documentation was done, which affirmed the significance of this point and the need to improve and adjust the innovation for homegrown associations, the conceivably better security of the framework from unapproved admittance to information was validated in correlation with wired and Wi-Fi organizations., which executes information transmission dependent on VLC innovation, utilizing Light-Emitting Diode (LED). Lighting sources as transmitters of the correspondence framework, with the coordination of the PLC interface. The utilization of the PLC interface makes it conceivable to improve on the establishment and execution of the VLC communicating modules since the data signal is provided to the last through the electrical cables that give capacity to the lighting installations. An evaluation of the working states of an information transmission framework dependent on VLC innovation with a PLC interface was completed, which uncovered that with the base admissible sign to-clamor proportion equivalent to 6 dB, the channel data transfer capacity is 8 Mbps, and the bit mistake rate will in general zero. The examination results can be utilized to assemble a corporate organization utilizing VLC innovation with a PLC interface, and discover their application for additional investigation of this innovation.