What is the main function of a duplexer in radio systems?

The main function of a duplexer in radio systems is to allow simultaneous transmission and reception on the same frequency. This is essential in half-duplex and full-duplex communication systems, where both sending and receiving need to occur without interference.

A duplexer achieves this by using a combination of filters and RF circuits that can route the incoming and outgoing signals appropriately within the same frequency band. This enables the system to effectively utilize the same channel for both operations, thereby improving efficiency and communication capabilities in various applications, such as in walkie-talkies, cell phones, and other radio systems.

Broadcast range enhancement, unwanted signal filtering, and the conversion of signals from analog to digital represent different functionalities that are not directly related to the primary purpose of a duplexer. While these functions may be important in radio communication systems, they do not define the core role of the duplexer, which centers on allowing for concurrent transmission and reception.