Multi element planar inverted-F antenna for enhanced gain

In this paper, we proposed the multi element PIFA with an enhanced gain characteristic. It is 35 times 15 times 5 mm³ in size so that it can be put in the A-model handset case of the S-company. The radiator of the antenna is divided into 4 elements to obtain the antenna with high gain characteristic. The divided antenna can obtain enhanced gain characteristic as currents are uniformly distributed to each element. Then, the feeding point of the antenna is modified in order to obtain a more uniform current distribution and remove opposite current as the current is directly distributed to the each element.