A LOOP ANTENNA SHEET EMBEDDED WITH A MATCHING CIRCUIT HAVING THREE TERMINALS

摘要

PURPOSE: A three-terminal loop antenna sheet with a built-in matching circuit is provided to improve coupling effect by being used for NFC(Near Field Communication) communications antennas. CONSTITUTION: A loop antenna sheet forms a loop antenna having a third terminal. The third terminal is connected to a second terminal and the terminal end of a loop. The second terminal branches off at the halfway between the first terminal and the loop. A fourth capacitance is connected between the second terminal and the third terminal. A matching circuit includes the fourth capacitance and a connection circuit. [Reference numerals] (AA) First terminal; (BB) Second terminal;