In today’s world, security becomes a very important issue. We are always concerned about the security of our valuables. In this paper, we propose an IOT based intelligent smart locker with OTP and face detection approach, which provides security, authenticity and user-friendly mechanism. This smart locker will be organized at banks, offices, homes and other places to ensure security. In order to use this locker firstly the user have to login. User has to send an unlock request code (OTP) and after getting a feedback Email with OTP, he/she will be able to unlock the locker to access his/her valuables. We also introduce face detection approach to our proposed smart locker to ensure security and authenticity.

A compact antenna with Coplanar waveguide (CPW) feed for WiMAX/WLAN applications is presented in this paper. Antenna is fabricated on FR4 substrate having size of (35mm×25mm).The rectangular antenna is etched with slit and stub which obtains triple band. The measured results shows that S11< ̶ 10dB impedance bandwidths are at 100MHz(2.39-2.49 GHz), 800MHz(3.4-4.2 GHz) and 1680 MHz(5.4-7.08 GHz).These frequency ranges meet the bandwidth requirement for Wireless local area network (WLAN) 2.4/5.8 GHz bands and Worldwide interoperability for microwave access (WiMAX) 3.5 GHz band. Bandwidth, S11, VSWR, radiation and gain characteristics of the antenna are investigated. Antenna exhibits good resemblance between measured and simulation results

The electrically compact microstrip antenna is studied with analysis of different modes of transmission. The design of a rectangular microstrip antenna (RMSA) is implemented for a Bluetooth band. The parallel shorting plate is inserted to reduce size which in turn shifts the null point of the patch to the position of the plate and excited the mode below its fundamental operating mode i.e. TM00 mode. IE3d simulator is used to analyze the mode of transmission in terms of the current path. Simulated and measured results validate the hypothesis made of the fact of the mode of transmission. 

This paper deals with the design and study of parameters of square shaped microstrip patch antenna suitable for 5G communication systems. It is designed on Rogers RT Duroid 5880, which has a dielectric constant of 2.2. In this study, a micro-strip line fed patch antenna array, operating at a resonant frequency of 10.21GHz which is preferred for 5G applications, is implemented using the Computer Simulation Technology (CST) software. The designed antenna attained a fractional bandwidth of 1.62%, a wide bandwidth of 165 MHz and a reflection coefficient of -14.341dB. The transmission line used for the antenna is an inset feed. In order to design a microstrip patch antenna, the substrate material and its thickness are initially selected. The selection of a proper dielectric material and its thickness is very crucial in designing microstrip patch antenna. This paper also explains how antenna performance changes with the thickness variation of the substrate. The modified antennas can operate around 28 GHz and 10 GHz, the frequency bands recently proposed for 5G applications. The radiation pattern, return loss, 3D gain and VSWR curves are simulated for all designed antennas.