Using a same antenna for simultaneous transmission and/or reception by multiple transceivers

A device comprising:

• an antenna;
• a processor;
• a first receiver to receive a first receive analog signal in a first band of frequencies from the antenna and to provide corresponding demodulated data to the processor, wherein the first receiver is coupled to the antenna via a first pair of feed-points;
• and
• a second receiver to receive a second receive analog signal in the second band of frequencies from the antenna and to provide corresponding demodulated data to the processor, wherein the second receiver is coupled to the antenna via a second pair of feed-points, wherein the first band and the second band are non-overlapping frequency bands,
• wherein the first pair of feed-points is located at a voltage null point of the antenna with respect to the second pair of feed-points, and wherein the second pair of feed-points is located at a voltage null point of the antenna with respect to the first pair of feed-points.

A circuit comprising:

• an antenna;
• a first transceiver to transmit and receive signals in a first band of frequencies, the first transceiver to process single-ended signals, wherein a first output terminal of the first transceiver is coupled to the antenna at a first feed-point, a second output terminal of the first transceiver being coupled to a constant reference potential;
• and
• a second transceiver to transmit and receive signals in a second band of frequencies, the second transceiver also to process single-ended signals, wherein a first output terminal of the second transceiver is coupled to the antenna at a second feed-point, a second output terminal of the second transceiver being coupled to the constant reference potential,
• wherein the first band and the second band are non-overlapping frequency bands.