What Causes the Shortened Remote Control Distance of a Car Key Fob?

[DelNoah]

The remote control distance of a car key fob is influenced not only by factors such as the transmitter, battery level of the key, and the car's receiving antenna but also by obstacles around the vehicle, such as trees and walls. Additionally, interference from other signals, such as mobile phone signals, signals from other car keys being used simultaneously, and nearby WiFi signals, can also affect the range. Here is some additional information: 1. The working principle, in simple terms, involves the key emitting a weak radio wave, which is received by the car's antenna. The electronic control unit then identifies the signal code, and the system's actuator (motor or electromagnetic coil) performs the locking or unlocking action. 2. When the owner enters the sensing area of the key system, simply touching the door handle will cause the carried identity-recognition 'key' to receive a low-frequency signal sent by the car. If this signal matches the identity information stored in the 'key,' the 'key' will be activated.