The TP Series cavity combiners are ideally suited to combining multiple transmitters in analog and digital communications systems. Unlike ‘star’ or ‘parallel’ harnessed cavity combiners, this user-friendly architecture provides a broadband solution that allows services to be combined across the entire bandwidth of the antenna. The future expansion of the combiner can be easily performed in the field, without retuning or returning the combiner to the factory. The flexibility of the TP Series also caters for other combiner designs requiring multiple transmit, receive, and or transmit/receive frequencies operating in simplex, half-duplex, or full-duplex configurations. These may be implemented using either separate transmit and receive antennas, or single antenna systems.