The aim of this research was manufacturing a parabolic trough solar collector in which reflecting surface is made of mirror steel rather than usual mirror and also predicting its theoretical performance.by adjusting planar ⩝ -shaped structures parallel to each other and welding them together, the main supporting structure was assembled and a parabolic-shape Teflon arc was installed in the apert...

Terahertz (THz) communications have emerged as a promising candidate to support the heavy data traffic and exploding network capacity in future 6G wireless networks. However, THz face many challenges for practical implementation, such propagation loss, signal blockage, hardware cost. In this article, an emerging paradigm of intelligent reflecting surface (IRS)-assisted is analyzed address above...

Free-space optical (FSO) systems are able to offer the high data-rate, secure, and cost-efficient communication links required for applications such as wireless front- backhauling 5G 6G networks. Despite substantial advancement of FSO over past decades, requirement a line-of-sight connection between transmitter receiver remains key limiting factor their deployment. In this article, we discuss p...

In this paper, an intelligent reflecting surface (IRS) assisted spectrum sharing underlay cognitive radio (CR) wiretap channel (WTC) is studied, and we aim at enhancing the secrecy rate of secondary user in subject to total power constraint transmitter (ST), interference (IPC) primary receiver (PR) as well unit modulus IRS. Due extra IPC eavesdropper (Eve) are considered, all existing solutions...