Antenna device

A method of transmitting a radio frequency signal, comprising:

• generating a first transmit signal via a first transmitter;
• generating a second transmit signal via a second transmitter;
• feeding the first and second transmit signals to the same edge of an antenna patch, wherein the patch has at least two spaced apart connection ports with respective transmit paths;
• generating a sigma signal comprising a sum of the first transmit signal and the second transmit signal;
• generating a delta signal comprising a difference between the first transmit signal and the second transmit signal;
• feeding the sigma signal to a first connection port of the at least two spaced apart connection ports;
• and
• feeding the delta signal to a second connection port of the at least two spaced apart connection ports, thereby transmitting a first radio frequency signal with a first polarization, and a second radio frequency signal with a second polarization orthogonal to the first polarization from the patch.

An antenna device, comprising:

• at least two transmitters;
• at least two patches each having a plurality of edges, wherein each patch has:
• a first connection port at a first edge of the patch;
• and
• a second connection port at the first edge of the patch spaced apart from the first connection port;
• and
• at least one signal combiner arranged to generate a difference between signals originating from the at least two transmitters, and at least another signal combiner arranged to generate a sum of the signals originating from the at least two transmitters,
• wherein each transmitter is operably connected to each patch.