A internal antenna in mobile phone case and a method of arranging internal antenna pattern in mobile phone case

PURPOSE: An antenna mounted in a cellular phone case and a method for arranging an antenna pattern mounted in a cellular phone case are provided to compensate reduction in a transmission and reception gain of an antenna by eddy current in a stacked state of an antenna mounted in a cellular phone and a batter. CONSTITUTION: An antenna mounted in a cellular phone case including an antenna pattern a first closed loop pattern portion and a second closed loop portion. The first closed loop pattern portion is not overlapped with a batter occupied area in the cellular phone case, is repeatedly circulated in a shape of a loop to form a part of the antenna, and wirelessly transmits and receives a communication signal. The second closed loop pattern portion is electrically connected to the outside of the first closed loop pattern portion to form a part of the antenna. An overlapped area between the second closed loop pattern portion and the battery occupied area is arranged below 20% so that a total inductance value has a range of 0.85-2.25 microhenry(uH). The second closed loop pattern portion is circulated in the shape of the loop one or more times to adjust an electrical length.