**4. Conclusions**

The wireless power transfer technique has received a lot of research attention in recent years. As a result, it is becoming a more popular application in consumer electronics and electric cars. There are, however, other methods for transmitting electricity, which can be categorised further based on their working ranges, such as near-field and far-field transmission. This chapter provides an outline of the concepts of various methods of wireless power transfer. The investigation of the receiver block is then addressed by looking at the characteristics of rectifier technologies. Later in the book, the Rectenna device (rectifying antenna) is defined in relation to Internet of Things (IoT) wireless charging in remote locations.
