Assignment_1_20_MAE

Assignment_1_20_MAE - Technology and Hardware 1) Describe...

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Technology and Hardware 1)Describe the principle of Inductive Coupling The principle of Inductive coupling is the transfer of energy from one circuit to another by the trace of mutual inductance or shared magnetic field. The change of current in one circuit induces the current flow in another device. The two devices may have a single unit, as in the primary and secondary sides of a transformer, or may be separated for i.e. (antennas on a transmitter and a receiver). Inductive coupling has an advantage of transferring low frequencies to energy sources. High frequency sources generally utilized capacitive coupling a capacitor placed in series with the coupled signal. Inductive coupling may have a desired or undesired approach; an example of a desired inductance coupling is wherein undesired form is called crosstalk or interference. Inductance coupling is one of the basic ways to communicate information in an RFID system. Inductive coupling operates at a 13.56 MHz (HF) and 135 kHz, ranging in a transmission (HDX, FDX, SEQ) of about one meter. Its storage capabilities are in the ball park of 100 kb (EEPROM Memory). Generally inductive coupling utilizes a passive power supply but is capable ready only and read-write functionalities. 2)What is the principle of Backscatter? The principle of backscatter is fairly similar to radars dependent upon the characteristics; an antenna will reflect part of the incoming electromagnetic wave back to where they came from. The electromagnetic wave is reflected by most objects that are larger than have of the wavelength. The efficiency of reflection is particularly large for antennas that are in resonance with the incoming waves. The short wavelengths of UHF facilitate the construction of antennas with smaller dimensions and greater efficiency. Backscatter is another way of communicating information to an RFID system. Backscattering operates at a 915 MHz (UHF), 2.5 GHz, 5.8 GHz (Microwave) and 868MHz in Europe; ranging in a transmission (HDX, FDX, SEQ) of about one meter. Its storage capabilities are a high bandwidth. Generally inductive coupling can utilize a passive, semi-passive or active power supply wherein capable of ready only and read-write functionalities. 3)What is the principle of Multipath?
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Assignment_1_20_MAE - Technology and Hardware 1) Describe...

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