An apparatus comprising: a radiating system configured to transmit and receive electromagnetic wave signals in first and second frequency regions, wherein the highest frequency of the first frequency region is lower than the lowest frequency of the second frequency region, the radiating system comprising: a radiating structure comprising: a ground plane layer having a first connection point; and a radiation booster comprising a connection point and configured to couple electromagnetic energy to and from the ground plane layer, the ground plane layer being configured to support at least two radiation modes, wherein an internal port of the radiating structure is defined between the connection point of the radiation booster and the first connection point of the ground plane layer, and a maximum size of the radiation booster is smaller than 1/30 times a wavelength of the lowest frequency of the first frequency region; at least one external port; characterized by a radiofrequency system comprising: a first port connected to the internal port of the radiating structure; a second port connected to the at least one external port of the radiating system; an impedance equalizer; and a matching network, the matching network for transforming an input impedance of the radiating structure, providing impedance matching to the radiating system in at least the first and second frequency regions of operation of the radiating system; wherein the impedance equalizer is configured to transform an impedance at the internal port of the radiating structure into an impedance having an imaginary part substantially equal to zero at a frequency larger than the highest frequency of the first frequency region and lower than the lowest frequency of the second frequency region; wherein the impedance equalizer comprises a first port that is the first port of the radiofrequency system and that is connected to the internal port of the radiating structure and a second port; wherein the matching network comprises a first port that is connected to the second port of the impedance equalizer and a second port that is connected to the external port of the radiating system and that is the second port of the radiofrequency system. a radiating structure comprising: a ground plane layer having a first connection point; and a radiation booster comprising a connection point and configured to couple electromagnetic energy to and from the ground plane layer, the ground plane layer being configured to support at least two radiation modes, wherein an internal port of the radiating structure is defined between the connection point of the radiation booster and the first connection point of the ground plane layer, and a maximum size of the radiation booster is smaller than 1/30 times a wavelength of the lowest frequency of the first frequency region; at least one external port; characterized by a radiofrequency system comprising: a first port connected to the internal port of the radiating structure; a second port connected to the at least one external port of the radiating system; an impedance equalizer; and a matching network, the matching network for transforming an input impedance of the radiating structure, providing impedance matching to the radiating system in at least the first and second frequency regions of operation of the radiating system; wherein the impedance equalizer is configured to transform an impedance at the internal port of the radiating structure into an impedance having an imaginary part substantially equal to zero at a frequency larger than the highest frequency of the first frequency region and lower than the lowest frequency of the second frequency region; wherein the impedance equalizer comprises a first port that is the first port of the radiofrequency system and that is connected to the internal port of the radiating structure and a second port; wherein the matching network comprises a first port that is connected to the second port of the impedance equalizer and a second port that is connected to the external port of the radiating system and that is the second port of the radiofrequency system.