CMOS Integrated Circuit Design for Wireless Power Transfer

Abstract

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Wireless Power Transmisson using Resonant Inductive Coupling

“…As a result, inductive and capacitive coupling can only be used for short-range power transfer, within a few times the diameter of the antenna device Dant, Unlike in a radiative system where the maximum radiation occurs when the dipole antennas are oriented transverse to the direction of propagation, with dipole fields the maximum coupling occurs when the dipoles are oriented longitudinally. [3] IV. PROPOSED SYSTEM The above discussed problem can be solved by choosing an alternative option for power transmission which could provide much higher efficiency; low transmission cost and avoids power theft.…”

“…Inductive coupling is the most widely used wireless technology; its applications include charging handheld devices like phones and electric toothbrushes, etc. [3] In 1826, Andre-Marie Ampere developed ampere's circuital law showing that electric current produces a magnetic field. [1,4] 1831, Michael Faraday developed Faraday's law of induction, describing the electromagnetic force induced in a conductor by a timevarying magnetic flux.…”

“…Inductive coupling is the most widely used wireless technology; its applications include charging handheld devices like phones and electric toothbrushes, RFID tags, and chargers for implantable medical devices like artificial cardiac pacemakers, or electric vehicles. [3] A. Far-field or Radiative Technique Microwaves or laser beams. These techniques can transport energy longer distances but must be aimed at the receiver.…”

“…Proposed applications for this type are solar power satellites, and wireless powered drone aircraft. [3] B. Near-field or Nonradiative Technique At large relative distance, the near-field components of electric and magnetic fields are approximately quasi-static oscillating dipole fields. These fields decrease with the cube of distance: (Drange/Dant) since power is proportional to the square of the field strength, the power transferred decreases as (Drange/Dant) −6 or 60 dB per decade.…”

“…[3] The concept behind resonant inductive coupling is that high Q factor resonators exchange energy at a much higher rate than they lose energy due to internal damping. Therefore, by using resonance, the same amount of power can be transferred at greater distances, using the much weaker magnetic fields out in the peripheral regions ("tails") of the near fields (these are sometimes called evanescent fields.…”