Abstract: A pattern reconfigurable antenna includes a radiator, a first parasitic element, a second parasitic element, a ground plane, a first switch and a second switch. The radiator includes a feed portion and a radiating portion that are interconnected. The first and second parasitic elements are symmetrically located at two opposite sides of the radiating portion, and are closely adjacent to and spaced apart from the radiating portion. The ground plane is located at another side of the radiating portion, and is spaced apart from the first and second parasitic elements. Each of the first and second switches is connected between the ground plane and a respective one of the first and second parasitic elements, and is operable to establish connection between the same.

Abstract: A pattern reconfigurable antenna includes a radiator, a first parasitic element, a second parasitic element, a ground plane, a first switch and a second switch. The radiator includes a feed portion and a radiating portion that are interconnected. The first and second parasitic elements are symmetrically located at two opposite sides of the radiating portion, and are closely adjacent to and spaced apart from the radiating portion. The ground plane is located at another side of the radiating portion, and is spaced apart from the first and second parasitic elements. Each of the first and second switches is connected between the ground plane and a respective one of the first and second parasitic elements, and is operable to establish connection between the same.

Abstract: The fully digital output device of this invention comprises: a communication interface connector to electrically connect a communication interface of a computer; a communication interface converter to convert signals and data obtained from said communication interface connector into a first format and to convert signals and data to be transferred to said communication interface into a second format; a digital signal converter to convert said first format digital audio signals into a third format and to output such third format signals; a buffer memory to store said second format digital audio signals of said communication interface converter to be processed by said digital signal converter; and a power management circuit to manage to output current obtained from said communication interface connector along with said third format digital signals of said digital signal converter; wherein said third format digital signal is used to drive a speaker directly.