Project Description

EMI/RFI FILTERS

LCA is an EMI-RFI Filter manufacturer. Low pass filters are designed to pass all frequencies below a specific cut-off frequency. LCA provides a wide range of filter capacitors which are mainly used in space, radar, avionics, military, and custom designs. Specific filters are constructed in accordance to L, H, G and Q series.

Filtering Electro Magnetic Interference

Our EMI and RFI filters are designed to serve similar purposes. The term “EMI filter” is short for “electromagnetic interference.” As the name means, these types of devices are used to block any interference that may be on a power line or a signal line. When utilized in a very specific way, these types of filters can also be used to block any interference that is being generated by the source device itself as well as by other types of equipment in the area. EMI filters are typically used to improve a particular device’s overall immunity and susceptibility to EMI signals that may be present in a particular location.
EMI filters work based on having high reactive components relative to their overall impedance. These types of filters usually include a few specific components that allow them to block both differential mode and common mode interference. EMI filters are most commonly used in the home environment in battery backup devices, like the types that are connected to computer terminals. They can also be used to provide voltage and surge protection.

Filtering Radio Frequency Interference

The acronym RFI stands for “radio frequency interference.” As its name means, RFI filters are designed to block out any interference of this type that may exist on the line in question. Radio frequency interference can best be described as a type of electrical energy that is within a frequency range that has commonly been used in the pass for radio frequency transmission. Radio frequency interference is most commonly found in the low frequency range of the broadcast spectrum from between a few kilohertz to 30 megahertz or more. Radiated radio frequency interference can also be found in the range from 30 megahertz to 10 gigahertz or more. Both EMI and RFI are transmitted through conduction over power lines and signal lines.

What kind of Devices cause Interference?

A large number of different types of devices can cause these types of interference. They include but are not limited to air conditioner motors, micro processors, power supplies and more. Any type of electrical or electronic component in an environment has the ability to generate EMI and RFI if it is left unchecked. When it comes to EMI, an additional offender can be found in the form of a device’s electrical power cord. These types of power cords are traditionally supposed to be shielded to prevent these types of interference. Depending on the age of the device or the original design in question, it may not have been possible for these types of safeguards to be enacted.