Review Paper on Wireless Power Transmission

In present era every person needs wireless system, but still power transmission for low power device we are using wired device continuous power supply is one of the major issues in the purpose of the application of wireless sensor network. But in the power system of wireless Sensor Network (WSN), the battery has a very limited lifetime and is not replaced yet by any other continuous power system. Imagine a future in which wireless power transfer is feasible cell phones, household robots, mp3 players, laptop computers and other portable electronics capable of charging themselves without ever being plugged in therefore we present the concept of transmitting power without using wires i. e. transmitting power as microwaves from one place to another is in order to reduce the cost, transmission and distribution losses increase efficiency. Typical WPT is a point to- point power transmission. For the WPT, we had better concentrate power to receiver. It was proved that the power transmission efficiency can approach close to 100 %.