Which type of cable is commonly used to connect a transmitter and receiver, depending on frequency?

Coaxial cable is primarily utilized to connect a transmitter and receiver due to its unique design, which includes a central conductor, an insulating layer, a conductive shield, and an outer protective layer. This structure allows coaxial cable to effectively transmit radio frequency (RF) signals while minimizing interference from external electromagnetic sources. The shielded design also helps to prevent signal loss and maintain signal integrity over longer distances, making it ideal for applications where frequency stability and quality are crucial, such as in radio communications, cable television, and internet connections.

In contrast, while twisted pair cable is commonly used for lower-frequency transmission, it is more susceptible to interference and not as effective for high-frequency applications. Optical fiber cable, despite its advantages in terms of speed and bandwidth, is typically used for data transmission rather than RF signals. Ribbon cable is more suited for internal connections in electronic devices, where multiple signals can be transmitted over a flat, flexible design. Therefore, coaxial cable stands out as the most appropriate choice for connecting transmitters and receivers based on frequency requirements.