In our daily life, WiFi has become an indispensable part. It allows us to connect to the Internet wirelessly at home, offices, public places and other places to obtain information conveniently and quickly. However, we sometimes find that the WiFi signal becomes weak or unstable, which is often due to the impact of certain devices or objects in the surrounding environment on the WiFi signal. This article will explore what devices and things can affect WiFi signals. 1. Electromagnetic interfererAn electromagnetic jammer is a device that emits strong electromagnetic waves and is used to interfere with wireless communication signals, including WiFi signals. These devices are often used for military purposes or other special occasions, but in some cases they can be misused or abused to cause interference to surrounding WiFi signals.signal jammer2. Electromagnetic shielding materialsSome building materials, such as metal, cement, fiberglass, etc., have the property of shielding electromagnetic waves. When WiFi signals pass through these materials, they are blocked or attenuated, causing the signal to become weak or unstable. Therefore, when choosing building materials, you need to consider their impact on WiFi signals.3. Electronic equipmentMany household electronic devices, such as microwave ovens, wireless phones, Bluetooth devices, etc., may interfere with WiFi signals. The radio wave frequency bands used by these devices are similar to WiFi signals, so they may interfere with each other when used at the same time, resulting in a decrease in WiFi signal quality.4. Metal obstaclesMetal obstacles, such as metal walls, metal furniture, metal doors, etc., can also affect WiFi signals. Metal has good electromagnetic shielding properties and can block or reflect WiFi signals, making them unable to pass through smoothly, resulting in signal weakening or interruption