FOUR-POINT LOOP ANTENNA INTO WHICH A MATCHING CIRCUIT IS INTEGRATED

摘要

In order to feed at four points to a loop portion (12) made of conductor formed around a central axis (O) in a loop fashion along a peripheral surface of a cylindrical body (11) formed by rounding a flexible insulator film member (20) around the central axis in a cylindrical fashion, each of four feeders (13) formed on the peripheral surface of the cylindrical body comprises a vertical feeding portion (131) having one end (131a) grounded and another end (131b) extending toward the loop portion, a zigzag line (132) disposed between the other end of the vertical feeding portion and the loop portion, a tap (133) for feeding from a feeding terminal (13a) to the vertical feeding portion.