A multiband antenna comprising: at least two sub antennas (1, 2) arranged in a plane and each configured to radiate and/or receive a respective signal; a first of said at least two sub antennas comprising an array of radiating elements, a majority of said radiating elements of said first sub antenna being arranged at different longitudinal positions within a first longitudinally extending region: a second of said at least two sub antennas comprising an array of radiating elements, a majority of said radiating elements of said second sub antenna being arranged at different longitudinal positions within a second longitudinally extending region; said first and second longitudinally extending regions being transversely offset with respect to each other; wherein at least one radiating element of said first sub antenna is located within a longitudinally extending region comprising at least one radiating element of said second sub antenna; and said first and second sub antennas are configured to operate in a same frequency band; the multiband antenna further comprising a further sub antenna configured to operate in a different higher frequency band to said first and second sub antennas, said further sub antenna comprising an array of radiating elements, wherein at least one of said at least one radiating element of said first sub antenna is located in and towards one end of said second longitudinally extending region, at least one radiating element of said second sub antenna is located in and towards one end of said first longitudinally extending region, and at least one radiating element comprises at least one shared radiating element configured to receive signals destined for said at least two sub antennas, such that said at least one shared radiating element comprises a radiating element in said two sub antenna arrays. at least two sub antennas (1, 2) arranged in a plane and each configured to radiate and/or receive a respective signal; a first of said at least two sub antennas comprising an array of radiating elements, a majority of said radiating elements of said first sub antenna being arranged at different longitudinal positions within a first longitudinally extending region: a second of said at least two sub antennas comprising an array of radiating elements, a majority of said radiating elements of said second sub antenna being arranged at different longitudinal positions within a second longitudinally extending region; said first and second longitudinally extending regions being transversely offset with respect to each other; wherein at least one radiating element of said first sub antenna is located within a longitudinally extending region comprising at least one radiating element of said second sub antenna; and said first and second sub antennas are configured to operate in a same frequency band; the multiband antenna further comprising a further sub antenna configured to operate in a different higher frequency band to said first and second sub antennas, said further sub antenna comprising an array of radiating elements, wherein at least one of said at least one radiating element of said first sub antenna is located in and towards one end of said second longitudinally extending region, at least one radiating element of said second sub antenna is located in and towards one end of said first longitudinally extending region, and at least one radiating element comprises at least one shared radiating element configured to receive signals destined for said at least two sub antennas, such that said at least one shared radiating element comprises a radiating element in said two sub antenna arrays. a second of said at least two sub antennas comprising an array of radiating elements, a majority of said radiating elements of said second sub antenna being arranged at different longitudinal positions within a second longitudinally extending region; said first and second longitudinally extending regions being transversely offset with respect to each other; wherein at least one radiating element of said first sub antenna is located within a longitudinally extending region comprising at least one radiating element of said second sub antenna; and said first and second sub antennas are configured to operate in a same frequency band; the multiband antenna further comprising a further sub antenna configured to operate in a different higher frequency band to said first and second sub antennas, said further sub antenna comprising an array of radiating elements, wherein at least one of said at least one radiating element of said first sub antenna is located in and towards one end of said second longitudinally extending region, at least one radiating element of said second sub antenna is located in and towards one end of said first longitudinally extending region, and at least one radiating element comprises at least one shared radiating element configured to receive signals destined for said at least two sub antennas, such that said at least one shared radiating element comprises a radiating element in said two sub antenna arrays.