Abstract:
A portable communication device includes an appearance, a substrate and a switchable resonant antenna. The substrate is disposed in the appearance, and the substrate has a ground plane. The switchable resonant antenna comprises a first connection portion, a switching unit, a first metal element and a second metal element, where the first connection portion is electrically coupled between the ground plane and the switching unit, the switching unit is configured to electrically couple the first connection portion to the first metal element or the second metal element according to a control signal generated corresponding to a detecting result, in order to generate a first resonant mode.
Abstract:
A mobile electronic device including an appearance, a first antenna and a metal part is provided. The appearance is used to accommodate a substrate. The first antenna is disposed on the substrate, and the metal part is disposed on an external surface of the appearance. During overall operation, the mobile electronic device receives or transmits signals through a first bandwidth radio frequency band by the first antenna and the metal part.
Abstract:
An electronic apparatus with a hidden antenna comprises a metal frame and a substrate. The metal frame comprises a plurality of side walls and a notch is passed through at least one side wall. A feeding terminal is configured at a bottom side of the notch. A first shorting terminal and a second shorting terminal are configured at two lateral sides of the notch. A metal surface of the substrate is electrically connected to the first shorting terminal, the second shorting terminal and the side walls, and the notch is faced to the substrate. The metal frame receives or transmits an electromagnetic signal, and delivers the electromagnetic signal over the feeding terminal, and a length of the bottom side of the notch is one half of a wavelength of the electromagnetic signal.
Abstract:
A portable communication device includes an appearance, a substrate and a switchable resonant antenna. The substrate is disposed in the appearance, and the substrate has a ground plane. The switchable resonant antenna comprises a first connection portion, a switching unit, a first metal element and a second metal element, where the first connection portion is electrically coupled between the ground plane and the switching unit, the switching unit is configured to electrically couple the first connection portion to the first metal element or the second metal element according to a control signal generated corresponding to a detecting result, in order to generate a first resonant mode.
Abstract:
A handheld device includes an antenna area and an outer frame, wherein the outer frame includes a frame body and a carrier. The antenna area is for transmitting a radio frequency signal with a first wavelength and has a ground part and a feeding part. In addition, the ground part within the antenna area is electrically connected to a ground plane. The frame body of the outer frame has an extended area corresponding to the antenna area to form a projected feeding point. The carrier of the outer frame is disposed at the peripheral area of the opening of the frame body, wherein the peripheral area of the frame body has a first ground point electrically connected to the ground plane, and the spacing between the first ground point and the projected feeding point is correlated to the first wavelength.
Abstract:
A handheld electronic device comprises a housing, a receiver, a balance antenna and a body. The housing comprises a top end and a bottom end. The receiver is located in the housing and near the top end, and the balance antenna is located in the housing and near the bottom end. The body is located in the housing and electrically couples to the receiver and the balance antenna.
Abstract:
A receiving device for a global positioning system and an antenna structure thereof. The receiving device includes a housing, a circuit board and the antenna structure. The circuit board is disposed inside the housing and has a ground portion and a signal feeding portion. The antenna structure is disposed inside the housing and includes a metal plate, a first electric conducting element and a second electric conducting element. The metal plate is used for receiving a GPS signal. The first electric conducting element has one end coupled to the metal plate, and the other end coupled to the ground portion of the circuit board. The second electric conducting element for feeding the GPS signal to the circuit board has one end coupled to the metal plate, and the other end coupled to the signal feeding portion of the circuit board.
Abstract:
An antenna comprises an external high-band portion and an internal low-band portion. The external high-band portion reduces energy dissipation from nearby components, and the internal low-band portion reduces the phantom head effect. The antenna combines the external high-band portion and the internal low-band portion, utilizing the advantages of the two portions to benefit the receiving efficiency of the antenna.
Abstract:
A shadow mask, or color selection electrode, in a color cathode ray tube (CRT) is in the form of a thin metal foil and includes a large number of apertures through which electron beams are directed onto the phosphorescent coating on the CRT's display screen for forming a video image. The apertured shadow mask is also used with a light source during CRT manufacture to form a large number of spaced phosphor elements in the phosphorescent coating. Ideally, all of the beam passing apertures and phosphor elements are circular in cross-section, but the shadow mask is stretched and maintained under high tension when mounted in the CRT causing some of the apertures, particularly those adjacent its four corners, to also become stretched and assume an oval shape. This is avoided in the present shadow mask by providing the areas in the vicinity of four corners of the shadow mask with oval apertures which are elongated in a direction generally transverse to the mechanical forming direction, or the direction of greatest tension when the mask is stretched and mounted in a color CRT. After installation in a CRT, the oval apertures assume a circular shape because of the greater tension applied along the short axis of each aperture. The remaining apertures in the center portion of the mask retain their circular shape after installation because they are under less tension than the outer apertures.
Abstract:
A touch display assembly structure is disclosed, which includes a capacitor type touch panel, a display panel, a plastic side frame, and an adhesive layer. The plastic side frame includes a side frame edge and a support piece disposed inner the side frame edge. The support piece is disposed between the touch panel and the display panel. The support piece has an opening to expose a display area of the display panel. The adhesive layer bonds the capacitor type touch panel and the support piece. There is an air layer disposed between the touch panel and the display panel. The material of the support piece includes polyphenylene sulfide. The thickness of the support piece is less than 0.4 mm.