How To Block Electromagnetic Interference In PCB Through RF Shield?

How To Block Electromagnetic Interference In PCB Through RF Shield?

Radiofrequency (RF) shielding is a device specifically designed to block radiofrequency or electromagnetic interference in the PCB. Electromagnetic or radiofrequency interference is an external disturbance that effectively impacts the circuit’s electromagnetic induction. In some cases, the RF interference is placed in the PCB circuit to shield the Electromagnetic Interference (EMI). Hence, in such cases, the developers in PCB layout services place RF cans to cover the electrical system from EM or RF interference. 

Therefore, in this post, let us see the effect of RF interference in the PCB circuit and how RF can act as a perfect shielding material.

Impact Of RF Interference On Circuit:

It is a challenge for many PCB designers to eliminate RF interference in the given electrical circuit entirely. RF interference causes signal disruption, circuit malfunction, control glitches, and errors even after being sourced externally or internally. 

You may wonder how RF interference occurs in the electronic circuit. So, every circuit laid on a single PCB will experience different frequencies. Suppose the electronic system placed on the PCB uses a radio communication system with the help of a radio spectrum; other circuits within the vicinity are highly subjective for RF interference. Hence, the impact of the unnecessary RF interference causes considerate circuit issues and should be addressed within the time. 

RF Shield (RF Cans):

There are many ways that PCB design services experts use to shield the RF interference in the circuit. It includes having enough spacing between the circuit and components utilizing the RF spectrum, abiding by the circuit design without compromising, and incorporating techniques in RF shielding.

However, it is not cost-effective if you consider having a compact design or following the guidelines. Hence, employing the RF shielding techniques in the circuit will be a practical and cost-effective solution.

How Do RF Shields Work?

RF shield has been used in the circuit to reduce the RF interference effect, which is placed adjacently on the same. These shields act as a barrier between the source and the affecting section, thereby diminishing the intensity of the RF interference field.

RF Cans:

RF can is a shield device designed to block electromagnetic interference in the circuit. They are similar to metal covers which enclose the components emitting RF interferences. This RF frame reduces the transmission of magnetic and electric radiations from the source region to other sensitive sections.

How To Fix RF Cans In The Circuit?

The best part of fixing RF cans in the circuit is that it does not require any circuit modification or alteration. These shields can be placed directly on the electrical circuits without altering the existing system.

Dimension And Material Used By RF Cans:

The measurement, material type, length, width, height, and installation of RF cans differ accordingly. For example, in the case of material type, if you are considering enclosing the source RF interference, then stainless steel RF cans are ideal. If you need to enclose the components that experience the vicinity of RF interference, then it is perfect to use aluminium RF cans.

It is the same for the dimension, mounting method, and ventilation. Hence, it is always best to have expert advice in choosing suitable materials, sizes, and other related materials for your RF cans.

Therefore, these are the essentials that one should know about RF shields. Sunstream is your ideal partner for designing PCB within its electromagnetic compliance.