Patent ID: 6933804

Claim:
Radio frequency diplexer having two or more resonators, said diplexer including: at least three connections, providing a common signal path, a transmitting device and associated transmission path, and a receiving device and associated reception path, at least a first resonator associated solely with the transmission path, said first resonator associated solely with the transmission path being provided with an input for feeding in transmission signals, at least a second resonator associated solely with the reception path, said second resonator being provided with an output device to output the received signals at the associated connection, and at least third and fourth additional resonators, at least one of said third and fourth resonators being provided with an input/output for feeding signals from a common signal path and for outputting signals to the common signal path, the third and fourth additional resonators forming an interconnection resonator pair which are strongly coupled to one another, wherein both the transmission path and the reception path are coupled to at least one of the third and fourth resonators for inputting to/outputting from the common signal path.