RF1543-000 is a part of the RF1543 series HF/VHF Circulator/Isolator from TE Connectivity. This series of parts are designed for applications with operating frequencies between 100 MHz and 500 MHz. The circularly polarized part works as a three-port circulator/isolator with varying levels of isolation, insertion loss, and directivity. It is specifically designed for wireless systems such as cellular base stations, radio links, and radio transmitters, among other applications.