Wireless communication systems allow the transfer of information without the use of physical cables. They utilize radio waves, microwaves, or infrared signals to transmit data over distances. Common examples include cellular networks, Wi-Fi, and Bluetooth, which enable devices like smartphones, laptops, and tablets to connect and communicate. These systems consist of various components, including transmitters, receivers, and antennas. The transmitters send signals, while receivers capture them, allowing for two-way communication. Wireless communication is essential for modern connectivity, supporting applications in telecommunications, internet access, and IoT (Internet of Things) devices.