As newer and newer technology comes out, issues regarding signal interference have begun to receive attention. Radio Frequency Interference (RFI) is natural interference caused by electromagnetic waves. When two electromagnetic waves with similar frequencies are being received by one device simultaneously, interference will occur. This is one of the most common types of wireless interference.

The mainstream frequency bands that wireless networks adopt are 2.4GHz and 5GHz (Bluetooth and Wi-Fi). Coincidentally, the transmission frequencies of USB products are 2.5GHz and 5GHz, which means these frequencies are very similar to one another.

Due to the frequencies of wireless networks and USB products being similar, interference often occurs, greatly affecting the quality of the connection. For example, when a user is using a Bluetooth mouse while using a USB storage device, they could potentially interfere with one another, especially if the USB cable is not certified and cannot block out the electromagnetic waves that cause RFI. This can result in affecting the Bluetooth mouse’s wireless signals, making it hard to control for the user.

The graph below shows the frequency shielding performance of a USB cable from 10MHz to 6GHz. The “FAIL” signal in the top right corner means that this cable is at risk of RFI.

Allion is a professional USB cable and connector verification laboratory certified by the USB Organization. With our decades of testing experience, we can conduct tests and analyses for products related to RFI interference. We can also provide professional and reliable consulting services for design, verification, and certification, helping our clients quickly move forward in the industry.


Faster, Easier, Better: The Most Trusted Customized Consulting Service for Cable & Connector

Through these professional services, Allion is committed to providing our clients with faster, easier, and better high-quality service experience. In addition to assisting clients to launch their products on schedule, Allion can also give you confidence and peace of mind when handing your products over to your consumers. Please feel free to contact us through the online form. Allion will be sincerely at your service!


Allion has a complete range of testing equipment, such as power supplies, electrical appliances, testing mechanisms, and user scenario environments. Allion can also conduct customized tests, saving our clients from looking for different laboratories for various tests.


Allion has decades of testing experience and can provide services such as design consultation, verification explanations, certification planning, and more. This helps our clients pass certifications in the shortest time possible.


Allion can also provide problem analysis, debugging support, and solution suggestions when there is an issue during product verification, solving our clients’ problems as quickly as possible.


If you have any requirements, please contact with us.