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The fact that a USB 3.0 device or a corresponding cable interferes with radio traffic in a WLAN network or reduces the voice quality of DECT devices (radio telephones) does not happen very often, but the problem is well known. It was not only noticeable in 2017; Intel published corresponding measurements back in 2012 (see below). The USB 3.0 device interferes with WLAN and DECT due to insufficient shielding. In most cases, the problem is with the cable for power and data transmission, because it acts as an antenna for the interfering radiation. In this little guide you can read about the symptoms of radio interference and what you can do about it.
A USB 3.0 device usually interferes with WLAN and DECT if the cable used for the connection is too close to the computer or router. So if you are using a long cable, it should not be wound up directly next to / on the device. The main problem that the FRITZ! Box manufacturer AVM in one Service contribution treated, but is often not in the length, but in the shielding of the cable. So if you have devices such as external hard drives, your smartphone or tablet or other USB 3.0 devices on a Mac, MacBook, PC, laptop or router, then switching from cheap cables to high-quality, well-shielded cables can be worthwhile (see below).
With DECT devices, i.e. radio telephones that work cordlessly, radio interference from USB 3.0 cables can lead to a reduced voice quality. If this is the case with you, then check the connected devices on the computer and router. Even if you use a hub or dongle, the problem can arise, as with the Satechi Hub for MacBook Pro 2016/2017. With WLAN connections, the speed of data transmission is disturbed or slowed down. However, only the frequencies around 2,4 GHz are affected, but not the bands around 5 GHz.
Solutions or improvised improvements bring, as already indicated, cables with good shielding, which are not used as much as antennas for the radiation from the USB devices. You can also upgrade existing cables by using a ferrite core. You probably know ferrite cores as the cylindrical things on USB, VGA, HDMI– and power supply cables. They serve as collectors or dampers of the radiation emitted by the cable and thus reduce interference.
The USB 3.0 device interferes with WLAN and DECT - so try these products to bring about an improvement:
After graduating from high school, Johannes completed an apprenticeship as a business assistant specializing in foreign languages. But then he decided to research and write, which resulted in his independence. For several years he has been working for Sir Apfelot, among others. His articles include product introductions, news, manuals, video games, consoles, and more. He follows Apple keynotes live via stream.
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