Abstract: A system and method for making a call in a speakerphone mode in a mobile device including a number of loudspeakers are provided. The system includes a sensor for detecting an orientation of the mobile device, and a controller for activating part or all of the number of loudspeakers, according to a signal sensed by the sensor, when making a call in the speakerphone mode. The system and method can activate all of the number of loudspeakers in a case where the call is made in the speakerphone mode at a higher volume level or only one loudspeaker in a case where a high quality of audio sound is desired despite the volume level being low. The system and method can automatically activate part or all of the number of loudspeakers according to the orientation of the mobile device, sensed by a sensor, thereby enhancing user convenience.

Abstract: A system and method for making a call in a speakerphone mode in a mobile device including a number of loudspeakers are provided. The system includes a sensor for detecting an orientation of the mobile device, and a controller for activating part or all of the number of loudspeakers, according to a signal sensed by the sensor, when making a call in the speakerphone mode. The system and method can activate all of the number of loudspeakers in a case where the call is made in the speakerphone mode at a higher volume level or only one loudspeaker in a case where a high quality of audio sound is desired despite the volume level being low. The system and method can automatically activate part or all of the number of loudspeakers according to the orientation of the mobile device, sensed by a sensor, thereby enhancing user convenience.

Abstract: A built-in antenna module includes a main board including a feed pad, a ground pad, and a ground layer having a predetermined area; an antenna radiator installed on the main board to have a predetermined height, and including a feed pin and a ground pin, the feed pin and the ground pin being electrically connected to the feed pad and the ground pad of the main board, respectively; a conductor disposed on an inner surface of a case frame and having a predetermined area and thickness, the case frame providing an installation space for the main board and forming an exterior of the terminal; and at least one electrical connection unit interposed between the conductor and the main board and serving as a medium that electrically connects the conductor to the ground pad and the ground layer of the main board.

Abstract: A built-in antenna module for a portable wireless terminal is provided. In the built-in antenna module, a mainboard, which is an RF board, has a feeding unit and a grounding unit. A radiator is disposed on one side of the mainboard and has a feed pin and a ground pin that are electrically connected to the feeding unit and the grounding unit, respectively. A conductive ground plate is disposed on the other side of the mainboard to have a predetermined height. An end of the conductive ground plate is grounded to the grounding unit of the mainboard. The distance between the radiator and the ground plate is maximized to improve antenna performance.

Abstract: A built-in antenna module includes a main board including a feed pad, a ground pad, and a ground layer having a predetermined area; an antenna radiator installed on the main board to have a predetermined height, and including a feed pin and a ground pin, the feed pin and the ground pin being electrically connected to the feed pad and the ground pad of the main board, respectively; a conductor disposed on an inner surface of a case frame and having a predetermined area and thickness, the case frame providing an installation space for the main board and forming an exterior of the terminal; and at least one electrical connection unit interposed between the conductor and the main board and serving as a medium that electrically connects the conductor to the ground pad and the ground layer of the main board.

Abstract: A built-in antenna module for a portable wireless terminal is provided. In the built-in antenna module, a mainboard, which is an RF board, has a feeding unit and a grounding unit. A radiator is disposed on one side of the mainboard and has a feed pin and a ground pin that are electrically connected to the feeding unit and the grounding unit, respectively. A conductive ground plate is disposed on the other side of the mainboard to have a predetermined height. An end of the conductive ground plate is grounded to the grounding unit of the mainboard. The distance between the radiator and the ground plate is maximized to improve antenna performance.

Abstract: A dual-frequency hopping device and method for a frequency synthesizer. An intermediate local oscillating frequency is decreased in the unit of a first frequency by a prescribed number of times as a channel is sequentially increased, to output an intermediate local oscillating frequency signal. A radio local oscillating frequency is increased by one level in the unit of a second frequency when the intermediate local oscillating frequency is decreased by the prescribed number of times, to output a radio local oscillating frequency signal.

Abstract: A method for generating frequencies in a dual phase locked loop (PLL). The method comprises the steps of: generating radio frequency local oscillations (RFLO) sequentially increased in the bandwidth at a given interval of more than two channels; and generating a group of intermediate frequency local oscillations (IFLO) gradually increased from a reference frequency channel by channel in said given interval, wherein said group of IFLOs are sequentially repeated at said given interval.