What is RF Triplexer: Features, Working & Manufacturers

An RF triplexer is a three port passive multiplexer that allows a single antenna to transmit and receive across three distinct frequency bands simultaneously. Its working principle involves combining three highly selective band pass filters to route signals with minimal interference. Key features include high port isolation and low insertion loss, with top manufacturers including Murata, TDK and Broadcom.

As we know, multiplexers are circuits that perform a similar function to switches. For systems requiring a larger number of ports, multiplexers are often used in RF system designs instead of RF switches. In radio frequency designs, a multiplexer connects RF signals at the input and output ports.

There are various multiplexer types, such as duplexers, triplexers, quadplexers, and quintplexers, categorized based on the number of RF input ports they possess. All of these types share a single output port, to which any of the input ports can be connected based on simple control programming input.

The diplexer, triplexer, quadplexer, and quintplexer will have 2 ports, 3 ports, 4 ports, and 5 ports respectively, in addition to the output antenna port.

The figure above depicts the basic functional symbol of an RF triplexer. RF triplexers are widely used in radar systems and other wireless transmitter and receiver systems.

RF Triplexer Manufacturers

Here’s a list of some of the prominent RF Triplexer manufacturers:

• Wainwright Instruments, GmbH
• API Technologies Corp.
• Anatech Electronics
• Bird Technologies
• Microlab
• Johanson Technology, Inc.
• Orion Technologies

Conclusion

RF triplexers enable sophisticated multi band antenna sharing, drastically reducing hardware space in compact devices like modern 5G smartphones. Utilizing triplexers with high port isolation ensures crystal clear signal routing across multiple frequency bands without destructive cross-channel interference.