摘要:
A wireless device includes a first antenna element resonating with a first frequency, a first feeding point coupled to the first antenna element and disposed on a ground plane in the wireless device, and a first matching circuit of which its first end is coupled to the first feeding point. The wireless device also includes a second antenna element resonating a second frequency higher than the first frequency, a second feeding point coupled to the second antenna element and disposed on the ground plane, a second matching circuit of which one end is coupled to the second feeding point, and a radio circuit coupled via a transmission line to a common connection point shared by respective second ends of the first and second matching circuits.
摘要:
A wireless device includes a first antenna element resonating with a first frequency, a first feeding point coupled to the first antenna element and disposed on a ground plane in the wireless device, a first matching circuit of which first end is coupled to the first feeding point, a second antenna element resonating a second frequency higher than the first frequency, a second feeding point coupled to the second antenna element and disposed on the ground plane, a second matching circuit of which one end is coupled to the second feeding point, and a radio circuit coupled via a transmission line to a common connection point shared by respective second ends of the first and second matching circuits.
摘要:
An optical element is disposed on an optical path between a beam branching element and a photodetector. The optical element is disposed at a focal position of a stray light beam reflected by a recording layer except a target recording layer, and shields or attenuates the light beam in a region where the stray light beam converges.
摘要:
A laser beam emitted from a light source is divided into a main beam and two sub-beams by a diffraction grating. A filter is arranged between a collimator lens and an objective lens. A filter unit is arranged in a predetermined pattern in the filter. The filter unit gives a maximum transmittance or a maximum reflectance at an incident angle at which the laser beam is incident in a parallel light state. The filter unit is formed in a pattern in which at least the laser beam reflected from a layer except a recording layer of an irradiation target is prevented from entering a sub-beam sensor pattern.
摘要:
An antenna for portable cellular telephone can adjust each of multiple antenna elements efficiently and independently to a predetermined resonance frequency. A first antenna element and second antenna element are mounted on and anchored to one common base. Terminals for feeding power to the first antenna element and the second antenna element are provided respectively. The terminals are coupled to matching circuits. This structure facilitates separate and efficient adjustment of resonance frequency of the first antenna element and the second antenna element.
摘要:
A magneto-optical recording medium includes a recording layer and a reproducing layer respectively formed by magnetic layers on a substrate. A record magnetic domain is formed within the recording layer by using a magnetic head, which is transferred into a reproducing layer by irradiating a laser beam upon reproduction. The physical length in recording a unit bit is taken as a unit domain length. Where the unit domain length is 1T and “1” is recorded in 1T, “1” is recorded in a former half 1T/2 and “0” is in a latter half 1T/2 by applying one period of an alternating magnetic field to the unit domain length.
摘要:
A magneto-optical recording medium of magnetic domain enlarging/reproducing system including a recording layer and a reproducing layer, a gate layer selectively extracting each magnetic domain within the recording layer is formed on the recording layer, a magnetic field reinforcement layer reinforcing a leakage magnetic field reaching the reproducing layer is formed on the gate layer, and a blocking layer blocking an exchange coupling force from the magnetic field reinforcement layer to the reproducing layer is formed on the magnetic field reinforcement layer.
摘要:
An input device includes an electrode part, a switching circuit, a driving circuit, a detecting circuit, and a controller. The electrode part includes a plurality of electrode pieces. The switching circuit is formed of a plurality of switches connected to the electrode pieces respectively. The driving circuit and the detecting circuit are connected to the electrode part via the switching circuit. The controller is connected to the driving circuit, the switching circuit, and the detecting circuit. The controller controls the respective switches such that the electrode pieces are individually opened or connected to one of the driving circuit and the detecting circuit.
摘要:
An input device includes an electrode part, a switching circuit, a driving circuit, a detecting circuit, and a controller. The electrode part includes a plurality of electrode pieces. The switching circuit is formed of a plurality of switches connected to the electrode pieces respectively. The driving circuit and the detecting circuit are connected to the electrode part via the switching circuit. The controller is connected to the driving circuit, the switching circuit, and the detecting circuit. The controller controls the respective switches such that the electrode pieces are individually opened or connected to one of the driving circuit and the detecting circuit.
摘要:
A diffraction element is disposed between a beam branching element (such as a beam splitter) and a photodetector. The diffraction element further segment an interference fringe introduced into stray light by a diffraction grating which divides a laser beam emitted from a laser beam source into a main beam and two sub-beams.