A communication device, comprising: an encoder configured to generate a plurality of digital baseband signals (2002.1 - 2002.n); a plurality of digital-to-analog converters (2004.1 - 2004.n) to convert the plurality of digital baseband signals (2002.1 - 2002.n) to a plurality of analog baseband signals; a plurality of RF-chains (2003.1 - 2003.n) comprising a plurality of antenna arrays (2006.1 - 2006.n), each RF-chain (2003.1 - 2003.n) comprising: one of the plurality of antenna arrays (2006.1 - 2006.n) comprising a plurality of antenna elements (2008.1 - 2008.n); a mixer (2005.1 - 2005.n) configured to convert its corresponding analog baseband signal of the plurality of analog baseband signals to an analog radio frequency signal; and a plurality of phase shifters (2007.1 - 2007.n), wherein a phase shifter of the plurality of phase shifters (2007.1 - 2007.n) is configured to shift the phase of the analog radio frequency signal and to feed the shifted analog radio frequency signal to one or more antenna elements of the plurality of antenna elements of the respective antenna arrays; wherein at least two of the plurality of antenna arrays of the respective RF-chains are staggered along at least one of a horizontal dimension or a vertical dimension; and wherein the distance between adjacent elements of a projection of the plurality of antenna elements of the at least two of the plurality of antenna arrays onto the horizontal dimension is less than or equal to about half of a wavelength of a transmit signal from the at least two of the plurality of antenna arrays; or wherein the distance between adjacent elements of a projection of the plurality of antenna elements of the at least two of the plurality of antenna arrays onto the vertical dimension is less than or equal to about half of a wavelength of a transmit signal from the at least two of the plurality of antenna arrays. an encoder configured to generate a plurality of digital baseband signals (2002.1 - 2002.n); a plurality of digital-to-analog converters (2004.1 - 2004.n) to convert the plurality of digital baseband signals (2002.1 - 2002.n) to a plurality of analog baseband signals; a plurality of RF-chains (2003.1 - 2003.n) comprising a plurality of antenna arrays (2006.1 - 2006.n), each RF-chain (2003.1 - 2003.n) comprising: one of the plurality of antenna arrays (2006.1 - 2006.n) comprising a plurality of antenna elements (2008.1 - 2008.n); a mixer (2005.1 - 2005.n) configured to convert its corresponding analog baseband signal of the plurality of analog baseband signals to an analog radio frequency signal; and a plurality of phase shifters (2007.1 - 2007.n), wherein a phase shifter of the plurality of phase shifters (2007.1 - 2007.n) is configured to shift the phase of the analog radio frequency signal and to feed the shifted analog radio frequency signal to one or more antenna elements of the plurality of antenna elements of the respective antenna arrays; wherein at least two of the plurality of antenna arrays of the respective RF-chains are staggered along at least one of a horizontal dimension or a vertical dimension; and wherein the distance between adjacent elements of a projection of the plurality of antenna elements of the at least two of the plurality of antenna arrays onto the horizontal dimension is less than or equal to about half of a wavelength of a transmit signal from the at least two of the plurality of antenna arrays; or wherein the distance between adjacent elements of a projection of the plurality of antenna elements of the at least two of the plurality of antenna arrays onto the vertical dimension is less than or equal to about half of a wavelength of a transmit signal from the at least two of the plurality of antenna arrays. one of the plurality of antenna arrays (2006.1 - 2006.n) comprising a plurality of antenna elements (2008.1 - 2008.n); a mixer (2005.1 - 2005.n) configured to convert its corresponding analog baseband signal of the plurality of analog baseband signals to an analog radio frequency signal; and a plurality of phase shifters (2007.1 - 2007.n), wherein a phase shifter of the plurality of phase shifters (2007.1 - 2007.n) is configured to shift the phase of the analog radio frequency signal and to feed the shifted analog radio frequency signal to one or more antenna elements of the plurality of antenna elements of the respective antenna arrays; wherein at least two of the plurality of antenna arrays of the respective RF-chains are staggered along at least one of a horizontal dimension or a vertical dimension; and wherein the distance between adjacent elements of a projection of the plurality of antenna elements of the at least two of the plurality of antenna arrays onto the horizontal dimension is less than or equal to about half of a wavelength of a transmit signal from the at least two of the plurality of antenna arrays; or wherein the distance between adjacent elements of a projection of the plurality of antenna elements of the at least two of the plurality of antenna arrays onto the vertical dimension is less than or equal to about half of a wavelength of a transmit signal from the at least two of the plurality of antenna arrays.