24-02-2017, 06:43 PM
31-03-2017, 12:22 PM
In the modern era mobile phones are the basic need of every person. In this document a new proposal has been made so that the recharge of the mobile phones is done automatically as you speak on your mobile phone! This is done by using microwaves. The microwave signal is transmitted from the transmitter together with the message signal using a special type of antennas called a slotted waveguide antenna at a frequency of 2.45 GHz. There are minimum additions, which have to be made in mobile phones, which Are the addition of a sensor, a Rectena, and a filter.
There are two main concepts of this technique, the first is the electromagnetic spectrum and the second is the microwave region. Light contains all regions of the visible spectrum that have electromagnetic waves in it. Microwaves are radio waves having a wavelength of 1mm to 1m. The term microwave refers to the AC signal with frequencies between 300MHz and 300GHz. Microwave components are often distributed elements, where the phase of a voltage or current changes significantly over the physical extent of the device because the dimensions of the device are in the order of the microwave wavelength. At a much lower frequency, the wavelength is large enough so that there is an insignificant phase variation across the dimensions of the component. Microwave wavelengths range from about one millimeter (the thickness of a pencil lead) to one inch (about twelve inches). In a microwave oven, the generated radio waves are tuned to frequencies that can be absorbed by the food. The food absorbs the energy and heats up. The food dish does not absorb a significant amount of energy and stays much fresher. Microwaves are emitted from Earth, from objects such as cars and airplanes, and from the atmosphere. These microwaves can be detected to give information, such as the temperature of the object emitted by microwaves. Microwaves have wavelengths that can be measured in centimeters! The longest microwaves, the closest ones to a foot in length, are the waves that heat our food in a microwave oven. Microwaves are good for transmitting information from one place to another because microwave energy can penetrate the fog, light rain and snow, clouds and smoke. Shorter microwaves are used in remote sensing. These microwaves are used for clouds and smoke, these waves are good for seeing the Earth from space. Microwave waves are used in the communication industry and in the kitchen as a way of cooking food. Microwave radiation is still associated with energy levels that are generally considered harmless except for people with pace makers.
There are two main concepts of this technique, the first is the electromagnetic spectrum and the second is the microwave region. Light contains all regions of the visible spectrum that have electromagnetic waves in it. Microwaves are radio waves having a wavelength of 1mm to 1m. The term microwave refers to the AC signal with frequencies between 300MHz and 300GHz. Microwave components are often distributed elements, where the phase of a voltage or current changes significantly over the physical extent of the device because the dimensions of the device are in the order of the microwave wavelength. At a much lower frequency, the wavelength is large enough so that there is an insignificant phase variation across the dimensions of the component. Microwave wavelengths range from about one millimeter (the thickness of a pencil lead) to one inch (about twelve inches). In a microwave oven, the generated radio waves are tuned to frequencies that can be absorbed by the food. The food absorbs the energy and heats up. The food dish does not absorb a significant amount of energy and stays much fresher. Microwaves are emitted from Earth, from objects such as cars and airplanes, and from the atmosphere. These microwaves can be detected to give information, such as the temperature of the object emitted by microwaves. Microwaves have wavelengths that can be measured in centimeters! The longest microwaves, the closest ones to a foot in length, are the waves that heat our food in a microwave oven. Microwaves are good for transmitting information from one place to another because microwave energy can penetrate the fog, light rain and snow, clouds and smoke. Shorter microwaves are used in remote sensing. These microwaves are used for clouds and smoke, these waves are good for seeing the Earth from space. Microwave waves are used in the communication industry and in the kitchen as a way of cooking food. Microwave radiation is still associated with energy levels that are generally considered harmless except for people with pace makers.