A duplexer is a critical component in interfrequency duplex radio stations and repeaters. Its primary function is to isolate the transmitted and received signals, allowing simultaneous transmission and reception without interference. The duplexer consists of two sets of filters—typically stopband or bandpass filters—tuned to different frequencies. These filters prevent the local transmitted signal from reaching the receiver, thereby preserving receiver sensitivity.

In the walkie-talkie industry, a duplexer is also called an antenna sharing device. It must efficiently couple the weak received signals to the receiver while directing the stronger transmitted power to the antenna via the feeder cable. Importantly, it ensures that both functions operate independently and do not interfere with each other.

Characteristics

High Power Handling: Can withstand input power up to 200W with excellent reliability.

Enhanced Performance: Features silver plating and a low-loss cavity design to improve out-of-band suppression and signal isolation.

Optional Software Monitoring: Available with software-based monitoring capabilities for real-time status tracking.

Visual Indicators: Optional screens and indicator lights can be included to display device status clearly.