The field is then converted back to the electric power that then utilized. There are two categories of the power techniques (Tesla and Childress, 2010).
These power techniques include radiative and non-radiative. The non-radiative techniques apply the mechanism where the power is transmitted or transferred over very short distances through the magnetic fields by use of inductive coupling techniques between the wire coils. The application of this technology is applied in chargers of toothbrush, smart cards, RFID tags, and the chargers of the medical devices that are implanted such as the cardiac peacemakers and the inductive charging and powering of vehicles. The primary focus is come up with a wireless system that can recharge the handheld gadgets and mobile devices like digital music players, cell phones, and portable computers, which are tethered, to a plug on the wall. The radiative technique is also referred to as the power beaming where the power is transferred by the mechanism of the beams of radiation of the electromagnetic. This aspect applies to the microwaves and laser beams.
The technique can transmit energy to longer distances as compared to the non-radiative technique. The energy should always be aimed at the receiver. The applications that are proposed for this technique are in the use of solar power satellites and can be utilized in the drone aircraft that are wireless powered. A crucial issue that is associated with the wireless systems of the power is the limiting the peoples exposure and the living things that might come into the path of the radiation. The radiation contains potentially harmful effects. Many engineers and designers have faced significant challenges that have involved the power. Some of the challenges are the continuity of the power supply, optimizing the sensor locations, battery recharging