Antenna device for portable terminal

摘要

An antenna device for a portable terminal having a printed circuit board (PCB) is disclosed. The antenna device is comprised of first and second antenna elements. The first antenna element includes at least a portion of one or more metal members disposed within the portable terminal; is electrically connected with a ground surface of the PCB; and has a slot. The second antenna element, is disposed in proximity to the slot, spaced from and electromagnetically coupled to the first antenna element. The second antenna element receives RF power from the PCB and is configured to resonate at a frequency of the RF power.

主权项

1. An antenna device for a portable terminal having a printed circuit board (PCB), the antenna device comprising:
a first antenna element including at least a dual-use portion of one or more metal members that in addition to being a portion of the first antenna element also comprises part of a structure of the portable terminal including one or more of a portion of a metallic case frame, a metal structure for supporting a battery, a display unit, or a metal structure for reinforcing the PCB, all of which are disposed entirely within the portable terminal, and electrically connected with a ground surface of the PCB, and having a slot; and a second antenna element being substantially L-shaped and having a feed port end receiving RF power from an RF power source of the PCB, disposed entirely with the portable terminal and in proximity to the slot, spaced from and electromagnetically coupled to the first antenna element, and configured to resonate at a frequency of the RF power, wherein a length of the second antenna element and the slot are sized for optimum resonance at a center of a frequency band at which the antenna device operates, and in which the first antenna element is a parasitic element having current induced on its surface by electromagnetic coupling to the second antenna element.