A tablet comprising: An antenna substrate of an insulating material including a first loop antenna of a conductive material pattern formed to enclose an external circumference of an electronic pen sensing region for detecting a position of the electronic pen; and a plurality of first line antennas of a conductive material pattern which are arranged in parallel with each other within an internal portion of the electronic pen sensing region enclosed by the first loop antenna and ends of which are electrically connected to the first loop antenna to form a shape of comb teeth; and a scan substrate including a first multiplexer, MUX, which has the other ends of the plurality of first line antennas, as inputs, and is configured to select any one of the inputs according to a first selection signal, as an output; an amplifier which is configured to output a potential difference between an output of the first multiplexer and an output of the first loop antenna; and a micro controller unit, MCU, which is configured to generate the first selection signal in any manner to select at least one of the plurality of first line antennas and then detect a position of the electronic pen outputting a resonant voltage of a predetermined frequency, from any one of the first line antennas on the basis of the potential difference outputted from the amplifier when the electronic pen approaches closely the electronic pen sensing region, characterized in that: both ends of the first loop antenna formed on the antenna substrate are combined with a first conductive pattern formed on the scan substrate to form a closed loop, the other ends of the plurality of first line antennas are respectively connected to a plurality of first extension patterns which are insulated from and intersected with the first conductive pattern on the scan substrate, and the plurality of first extension patterns are connected with the input of the first multiplexer, wherein the tablet has a flexible and transparent sensing region, the antenna substrate is formed of transparent and flexible material, and the intersection and insulation between the first loop antenna and the plurality of line antennas are configured in the conductive portion of the scan substrate. An antenna substrate of an insulating material including a first loop antenna of a conductive material pattern formed to enclose an external circumference of an electronic pen sensing region for detecting a position of the electronic pen; and a plurality of first line antennas of a conductive material pattern which are arranged in parallel with each other within an internal portion of the electronic pen sensing region enclosed by the first loop antenna and ends of which are electrically connected to the first loop antenna to form a shape of comb teeth; and a scan substrate including a first multiplexer, MUX, which has the other ends of the plurality of first line antennas, as inputs, and is configured to select any one of the inputs according to a first selection signal, as an output; an amplifier which is configured to output a potential difference between an output of the first multiplexer and an output of the first loop antenna; and a micro controller unit, MCU, which is configured to generate the first selection signal in any manner to select at least one of the plurality of first line antennas and then detect a position of the electronic pen outputting a resonant voltage of a predetermined frequency, from any one of the first line antennas on the basis of the potential difference outputted from the amplifier when the electronic pen approaches closely the electronic pen sensing region, characterized in that: both ends of the first loop antenna formed on the antenna substrate are combined with a first conductive pattern formed on the scan substrate to form a closed loop, the other ends of the plurality of first line antennas are respectively connected to a plurality of first extension patterns which are insulated from and intersected with the first conductive pattern on the scan substrate, and the plurality of first extension patterns are connected with the input of the first multiplexer, wherein the tablet has a flexible and transparent sensing region, the antenna substrate is formed of transparent and flexible material, and the intersection and insulation between the first loop antenna and the plurality of line antennas are configured in the conductive portion of the scan substrate. both ends of the first loop antenna formed on the antenna substrate are combined with a first conductive pattern formed on the scan substrate to form a closed loop, the other ends of the plurality of first line antennas are respectively connected to a plurality of first extension patterns which are insulated from and intersected with the first conductive pattern on the scan substrate, and the plurality of first extension patterns are connected with the input of the first multiplexer, wherein the tablet has a flexible and transparent sensing region, the antenna substrate is formed of transparent and flexible material, and the intersection and insulation between the first loop antenna and the plurality of line antennas are configured in the conductive portion of the scan substrate.