A system comprising: a multi-modal sensing surface; and an object configured to extend sensing capabilities of the multi-modal sensing surface away from the surface, the object comprising a first antenna coil and a second antenna coil, wherein the first and second antenna coils (1110, 1112) are electrically connected together and wherein at least one of the first and second antenna coils (1110, 1112) comprises a plurality of radial elements (1116, 1118), wherein the at least one antenna coil (1110, 1112) has a circular shape and the radial elements (1116, 1118) extend inside and outside of the circle formed by the antenna coil (1110, 1112); and the multi-modal sensing surface comprising: two overlaid arrays (202, 208), the two arrays comprising a capacitive sensing electrode array and an array of RF antennas; a first sensing module coupled to the capacitive sensing electrode array and arranged to detect both an increase and a decrease of capacitance between electrodes in the array; and a second sensing module coupled to the array of RF antennas and arranged to selectively tune and detune one or more of the RF antennas (210, 211) in the array of RF antennas; wherein one of the first and second antenna coils (1110, 1112) in the object is arranged to couple with an RF antenna (210, 211) in the multi-modal sensing surface and wherein the other antenna coil (1110, 1112) is spatially separated from the multi-modal sensing surface and provides an extended touch area. a multi-modal sensing surface; and an object configured to extend sensing capabilities of the multi-modal sensing surface away from the surface, the object comprising a first antenna coil and a second antenna coil, wherein the first and second antenna coils (1110, 1112) are electrically connected together and wherein at least one of the first and second antenna coils (1110, 1112) comprises a plurality of radial elements (1116, 1118), wherein the at least one antenna coil (1110, 1112) has a circular shape and the radial elements (1116, 1118) extend inside and outside of the circle formed by the antenna coil (1110, 1112); and the multi-modal sensing surface comprising: two overlaid arrays (202, 208), the two arrays comprising a capacitive sensing electrode array and an array of RF antennas; a first sensing module coupled to the capacitive sensing electrode array and arranged to detect both an increase and a decrease of capacitance between electrodes in the array; and a second sensing module coupled to the array of RF antennas and arranged to selectively tune and detune one or more of the RF antennas (210, 211) in the array of RF antennas; wherein one of the first and second antenna coils (1110, 1112) in the object is arranged to couple with an RF antenna (210, 211) in the multi-modal sensing surface and wherein the other antenna coil (1110, 1112) is spatially separated from the multi-modal sensing surface and provides an extended touch area. two overlaid arrays (202, 208), the two arrays comprising a capacitive sensing electrode array and an array of RF antennas; a first sensing module coupled to the capacitive sensing electrode array and arranged to detect both an increase and a decrease of capacitance between electrodes in the array; and a second sensing module coupled to the array of RF antennas and arranged to selectively tune and detune one or more of the RF antennas (210, 211) in the array of RF antennas; wherein one of the first and second antenna coils (1110, 1112) in the object is arranged to couple with an RF antenna (210, 211) in the multi-modal sensing surface and wherein the other antenna coil (1110, 1112) is spatially separated from the multi-modal sensing surface and provides an extended touch area.