Patent ID: 8244287

Claim:
A communication system, comprising: a first radio system, comprising a first microwave radio, a second microwave radio, a first antenna, and a first dual mode coupler comprising a first dual mode transmission line extending between a first port and a third port and a second dual mode transmission line extending between a second port and a microwave absorbing termination, wherein the first microwave radio is coupled to the first port so that the first microwave radio is operable to at least one of outputting microwave signals into and receiving microwave signals from the first dual mode transmission line by the first port, wherein the second microwave radio is coupled to the second port so that the second microwave radio is operable to at least one of outputting microwave signals into and receiving microwave signals from the second transmission line by the second port, wherein the first antenna is coupled to the third port so that the first antenna is operable to at least one of outputting microwave signals into and receiving microwave signals from the first dual mode transmission line by the third port, and wherein the first dual mode transmission line is coupled to the second dual mode transmission line so that microwave signals in either of the first dual mode transmission line and the second dual mode transmission line propagate microwave signals in the other of the first dual mode transmission line and the second dual mode transmission line; and a second radio system, comprising a third microwave radio, and a second antenna coupled to the third microwave radio, wherein the first radio system and the second radio system are disposed in a geographic area so that one of the first antenna and the second antenna radiates microwave radiation to the other of the first antenna and the second antenna.