A processing system comprising: a product module assembly comprising a first slot assembly and a second slot assembly that is adjacent to the first slot assembly; and characterised by an RFID reader antenna assembly configured to be energized with a carrier signal, the RFID reader antenna assembly comprising: an inductive component including a loop antenna assembly, wherein the circumference of the loop antenna assembly is no more than 25% of the wavelength of the carrier signal; and at least one capacitive component coupled to the inductive component; wherein the inductive component is positioned proximate the first slot assembly to detect the presence of a first RFID tag assembly within the first slot assembly and not detect the presence of a second RFID tag assembly within the second slot assembly and the inductive component includes a multi-segment loop antenna assembly, wherein the multi-segment loop antenna assembly includes: at least a first antenna segment including at least a first phase shift element configured to reduce the phase shift of the carrier signal within the at least a first antenna segment, and at least a second antenna segment including at least a second phase shift element configured to reduce the phase shift of the carrier signal within the at least a second antenna segment, wherein the length of each antenna segment is no more than 25% of the wavelength of the carrier signal; and at least one matching component configured to adjust the impedance of the multi-segment loop antenna assembly. a product module assembly comprising a first slot assembly and a second slot assembly that is adjacent to the first slot assembly; and characterised by an RFID reader antenna assembly configured to be energized with a carrier signal, the RFID reader antenna assembly comprising: an inductive component including a loop antenna assembly, wherein the circumference of the loop antenna assembly is no more than 25% of the wavelength of the carrier signal; and at least one capacitive component coupled to the inductive component; an inductive component including a loop antenna assembly, wherein the circumference of the loop antenna assembly is no more than 25% of the wavelength of the carrier signal; and at least one capacitive component coupled to the inductive component; wherein the inductive component is positioned proximate the first slot assembly to detect the presence of a first RFID tag assembly within the first slot assembly and not detect the presence of a second RFID tag assembly within the second slot assembly and the inductive component includes a multi-segment loop antenna assembly, wherein the multi-segment loop antenna assembly includes: at least a first antenna segment including at least a first phase shift element configured to reduce the phase shift of the carrier signal within the at least a first antenna segment, and at least a second antenna segment including at least a second phase shift element configured to reduce the phase shift of the carrier signal within the at least a second antenna segment, at least a first antenna segment including at least a first phase shift element configured to reduce the phase shift of the carrier signal within the at least a first antenna segment, and at least a second antenna segment including at least a second phase shift element configured to reduce the phase shift of the carrier signal within the at least a second antenna segment, wherein the length of each antenna segment is no more than 25% of the wavelength of the carrier signal; and at least one matching component configured to adjust the impedance of the multi-segment loop antenna assembly.