The effect of the growth experienced in the electronic industry and the adverse use of electronic equipment in computations, communications, biomedical automation, space and many other reasons has resulted in electromagnetic interference. Commonly referred to by its initials EMI, this problem is bound to be severe in the near future, unless a method of control is arrived at.
The suppression of EMI should be a prime objective for anyone who is involved in this trade, and hence EMI shielding. This can be termed as the reduction of the electromagnetic field, in any given space by using barriers to block the field. These barriers are made of magnetic materials. There are various ways to apply shielding. Shielding is in this case applied to enclosures, isolating all electrical devices, and to cables to keep the wires safely from the surrounding where they run.
In a world that is becoming more and more dependent on electricity, and all its devices, there is need for protection of all the electrical equipment used in all places, both at home and work. Today EMI shielding can be found in countless devices in the office, home, factories as well as laboratories
Despite the ever presence of EMI, many, engineers physicists, and other people involved in technology are puzzled by the basic elements involved and all the shielding materials that serve to protect electronic equipment.
Here are answers to frequently asked questions pertaining to EMI and problems related to it.
A magnetic field - this comes from the source of magnetic flux. This source might be a motor an electric-power line a transformer or a bar magnet even Earth. Magnetic fields are responsible for the functioning of motors and transformers.
Electromagnetic radiation- Electromagnetic radiation is made up of electric and a magnetic field consists of two fields, electric and magnetic. The electric field is responsible for the production of forces, which are on the charge carriers in a conductor. When an electric charge is applied to the surface of a conductor, in brings in a current, which causes charge displacement within the conductor, cancelling the field applied inside, which causes the current to stop.
Materials used for EMI shielding
The common materials that facilitate EMI shielding include metal screen, sheet metal, and metal foam. Different positioning techniques are applied when one is shielding. During shielding, using these materials, one should be careful to make sure that any holes found on the mesh or shield are smaller, compares to the wavelength of radiation. This radiation is what is intended to be kept out, and if this is not adhered to, the enclosure or surface shielded will fail to approximate the conducting surface that is unbroken.
The suppression of EMI should be a prime objective for anyone who is involved in this trade, and hence EMI shielding. This can be termed as the reduction of the electromagnetic field, in any given space by using barriers to block the field. These barriers are made of magnetic materials. There are various ways to apply shielding. Shielding is in this case applied to enclosures, isolating all electrical devices, and to cables to keep the wires safely from the surrounding where they run.
In a world that is becoming more and more dependent on electricity, and all its devices, there is need for protection of all the electrical equipment used in all places, both at home and work. Today EMI shielding can be found in countless devices in the office, home, factories as well as laboratories
Despite the ever presence of EMI, many, engineers physicists, and other people involved in technology are puzzled by the basic elements involved and all the shielding materials that serve to protect electronic equipment.
Here are answers to frequently asked questions pertaining to EMI and problems related to it.
A magnetic field - this comes from the source of magnetic flux. This source might be a motor an electric-power line a transformer or a bar magnet even Earth. Magnetic fields are responsible for the functioning of motors and transformers.
Electromagnetic radiation- Electromagnetic radiation is made up of electric and a magnetic field consists of two fields, electric and magnetic. The electric field is responsible for the production of forces, which are on the charge carriers in a conductor. When an electric charge is applied to the surface of a conductor, in brings in a current, which causes charge displacement within the conductor, cancelling the field applied inside, which causes the current to stop.
Materials used for EMI shielding
The common materials that facilitate EMI shielding include metal screen, sheet metal, and metal foam. Different positioning techniques are applied when one is shielding. During shielding, using these materials, one should be careful to make sure that any holes found on the mesh or shield are smaller, compares to the wavelength of radiation. This radiation is what is intended to be kept out, and if this is not adhered to, the enclosure or surface shielded will fail to approximate the conducting surface that is unbroken.
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