Reader for wireless identification ic tag and wireless identification ic tag system

A reader for wireless identification IC tag comprising:

• a high-frequency generator generating a transmission electromagnetic wave;
• a second circuit outputting the transmission electromagnetic wave generated by the high-frequency generator with synchronizing with a first signal;
• an antenna transmitting the transmission electromagnetic wave outputted by the second circuit toward the wireless identification IC tag, and receiving a reflected electromagnetic wave from the wireless identification IC tag;
• a diode rectifying the reflected electromagnetic wave received by the antenna;
• a capacitor storing an integral value of a signal rectified by the diode;
• and
• a switch discharging the capacitor with synchronizing with the first signal, wherein
• the integral value stored by the capacitor is discriminated, thereby obtaining information from the wireless identification IC tag.

A wireless identification IC tag system comprising a wireless identification IC tag and a reader for wireless identification IC tag, the reader for wireless identification IC tag transmitting a transmission electromagnetic wave toward the wireless identification IC tag, and the reader for wireless identification IC tag receiving a reflected electromagnetic wave from the wireless identification IC tag, wherein

• the reader for wireless identification IC tag includes:
• a receiving circuit integrating the reflected electromagnetic wave;
• and
• a first circuit discriminating an intensity of the reflected electromagnetic wave based on a signal integrated by the receiving circuit.