An antenna system for providing identification functionality comprising: • two antenna structures , wherein each antenna structure comprises at least one antenna element , • a transceiver module configured to generate a sum interrogation signal and a delta interrogation signal, • a signal processing means , wherein the signal processing means is configured to process provided sum and delta interrogation signals into transmission signals, • at least two transmit-receive modules , wherein each of the transmit-receive modules is configured to transmit a transmission signal provided by the signal processing means by means of a respective one of the antenna structures , wherein when in operation the transceiver module is connected to the signal processing means , the signal processing means is connected to the transmit-receive modules , and the transmit-receive modules are connected to the antenna structures , and wherein each transmit-receive module is provided with an amplifying circuitry , the antenna system being characterized in that each amplifying circuitry comprises: a splitter node , wherein the splitter node is configured to split the transmission signal in at least a first and a second amplifier signal, a main power amplifier circuit , wherein the main power amplifier circuit comprises a main amplifier , wherein the main amplifier is configured to amplify the first amplifier signal, an auxiliary power amplifier circuit , wherein the auxiliary power amplifier circuit comprises an auxiliary amplifier , wherein the auxiliary amplifier is configured to amplify the second amplifier signal, and a power combiner node , wherein the power combiner node is configured to combine the first and the second amplifier signal of the main power amplifier circuit and of the auxiliary power amplifier circuit , and wherein the main power amplifier circuit and the auxiliary power amplifier circuit are provided in parallel between the power splitter node and the power combiner node . • two antenna structures , wherein each antenna structure comprises at least one antenna element , • a transceiver module configured to generate a sum interrogation signal and a delta interrogation signal, • a signal processing means , wherein the signal processing means is configured to process provided sum and delta interrogation signals into transmission signals, • at least two transmit-receive modules , wherein each of the transmit-receive modules is configured to transmit a transmission signal provided by the signal processing means by means of a respective one of the antenna structures , a splitter node , wherein the splitter node is configured to split the transmission signal in at least a first and a second amplifier signal, a main power amplifier circuit , wherein the main power amplifier circuit comprises a main amplifier , wherein the main amplifier is configured to amplify the first amplifier signal, an auxiliary power amplifier circuit , wherein the auxiliary power amplifier circuit comprises an auxiliary amplifier , wherein the auxiliary amplifier is configured to amplify the second amplifier signal, and a power combiner node , wherein the power combiner node is configured to combine the first and the second amplifier signal of the main power amplifier circuit and of the auxiliary power amplifier circuit , and wherein the main power amplifier circuit and the auxiliary power amplifier circuit are provided in parallel between the power splitter node and the power combiner node . <EOS>