A method for multiband wireless data transmission between an aircraft and one or more ground systems, the method comprising: receiving a first data set belonging to a first data domain at a first aircraft communication module; generating a first radio frequency, RF, signal based on the first data set, wherein the first RF signal is generated using the first aircraft communication module, and sending the first RF signal to a multiplexer connected to an aircraft broadband antenna positioned on an exterior of the aircraft; transmitting the first RF signal using the aircraft broadband antenna to a first ground system; receiving a second data set belonging to a second data domain at a second aircraft communication module; generating a second RF signal based on the second data set, wherein the second RF signal is generated using a second aircraft communication module, sending the second RF signal to the multiplexer; and transmitting the second RF signal using the aircraft broadband antenna to a second ground system, wherein a wavelength range of the first RF signal is different from a wavelength range of the second RF signal, and wherein the first and second data domains are different, the first data set belonging to the first data domain is received from a first aircraft system, wherein the second data set belonging to the second data domain is received from a second aircraft system, and wherein the first aircraft system and the second aircraft system are at least one of communicatively or physically separated. receiving a first data set belonging to a first data domain at a first aircraft communication module; generating a first radio frequency, RF, signal based on the first data set, wherein the first RF signal is generated using the first aircraft communication module, and sending the first RF signal to a multiplexer connected to an aircraft broadband antenna positioned on an exterior of the aircraft; transmitting the first RF signal using the aircraft broadband antenna to a first ground system; receiving a second data set belonging to a second data domain at a second aircraft communication module; generating a second RF signal based on the second data set, wherein the second RF signal is generated using a second aircraft communication module, sending the second RF signal to the multiplexer; and transmitting the second RF signal using the aircraft broadband antenna to a second ground system, wherein a wavelength range of the first RF signal is different from a wavelength range of the second RF signal, and wherein the first and second data domains are different, the first data set belonging to the first data domain is received from a first aircraft system, wherein the second data set belonging to the second data domain is received from a second aircraft system, and wherein the first aircraft system and the second aircraft system are at least one of communicatively or physically separated. wherein a wavelength range of the first RF signal is different from a wavelength range of the second RF signal, and wherein the first and second data domains are different, the first data set belonging to the first data domain is received from a first aircraft system, wherein the second data set belonging to the second data domain is received from a second aircraft system, and wherein the first aircraft system and the second aircraft system are at least one of communicatively or physically separated.