An international team of scientists has come up with a new measurement of the effect of electromagnetic radiation on electronics and electronics-related equipment.
Ammeter is an electromagnetic field detector that detects changes in the electromagnetic spectrum from radio waves to microwaves, microwave and short-wave radiation, and from infrared radiation to visible light.
The team of researchers led by Professor Andrew O’Connell, from Trinity College Dublin, discovered that a change in the ammeter’s frequency of 2.3GHz was responsible for the increase in the amount of radiation it detected.
Amperes are also commonly used to measure energy levels in electronics.
They measure the electrical resistance between two points, and they are also used to gauge the resistance between devices that can be physically broken down to calculate the energy of an electrical current.
The findings from Trinity, published in Nature Communications, will be used by electronics manufacturers to improve the efficiency of their products.
Amputation of the electrical circuit can be achieved by varying the frequency of the electromagnetic wave at which it is emitted, and it is believed that the frequency can be manipulated to produce an electromagnetic artefact called a ‘vacuum’.
The ammeter was used to test the efficiency and stability of some of the most popular devices in the world.
These include televisions, video games, computer monitors, and laptops.
“The results of our study show that the amperes used in the devices are sensitive to the frequency at which the wave is emitted,” Professor O’Donnell said.
“In particular, the higher the frequency, the lower the amplitude of the microwave noise.”
“In the most commonly used TV sets, we measured a microwave frequency of 3.6GHz.
The average ampere level in the TV set was 0.5.
In the laptop, the amperage of the ammeters was reduced to less than 0.25 amperers.”
The ammetering process used a simple voltage-controlled circuit which contained two components, the antenna and a switch that would be switched on or off depending on the input signal.
“It’s like a switch with a battery, but it can be set to either an off position or an on position,” Professor Eamonn McConaghy, of Trinity College, said.
This type of circuit has been used in many different kinds of devices for decades.
It has been applied in televisions and other electronic devices to measure ambient radiation and to detect changes in noise levels, he said.
Amperage levels are used to determine the efficiency, stability and performance of electronic devices, and this is a key factor in the development of new products.
“If a device is not going to perform optimally in terms of performance or reliability, it is not being manufactured,” Professor McConagha said.
The results from Trinity’s study will be useful for the electronics industry as it provides a measurement of how an item’s electrical behaviour is affected by electromagnetic noise.
“We are using these measurements to determine how to design better products and improve their performance,” Professor McGuinness said.
Source: Trinity College