Experimental Circuit Model for Increasing the Signal Strength level of a Mobile Phone into a Lift

Due to rapid change in human lifestyle in recent years, the demand for constructing a building is very high. On the other hand due to the construction of buildings the signal strength level into the lift of that building is very low which is known as the transmission path loss. Path loss may be arising due to reflection, refraction and scattering. Path loss is a function of frequency and time. An innovative circuit model is developed for predicting wireless signal coverage into the lift. In this paper, we propose a simulated circuit model to reduce the penetration loss based on the measurement of window size, temperature, and humidity conditions etc. An outdoor antenna is used to receive the electromagnetic signals from the surrounding environment. The received signals are oscillated by the oscillator circuit. After this, it is amplified and converted into an optical signal. For better performance, this signal is transmitted through the optical fiber. The optical fiber is entered into the wire which is used to move (up-down) the lift. At the last end of the fiber, it is connected to a device which converts this optical signal into an electrical signal. This signal is sent to the indoor model and after amplifying the signal it is transmitted through the indoor antenna. The mobile phone antenna receives that signal and finally it is amplified and sent to the speaker of the mobile phone. This model works on 4G/3G/2G networks. Our model enhanced the signal strength level in the lift, which is the same outside the lift. It also measured that the signal strength level was the same at the top and ground floor. Required transmitting power is lower than previous methods.