Abstract: There is provided a transmitter that transmits data in a spread spectrum communications system including a spread modulation portion spreading transmitting data with a spread code, an RZ conversion portion converting the transmitting data spread to an RZ signal, and an impulse sequence conversion portion multiplying the RZ signal by an impulse sequence to convert the RZ signal to an impulse radio signal.

Abstract: A signal transmission and reception device is disclosed that can be made compact and has wide-band band-pass characteristics. The signal transmission and reception device includes a first filtering unit that is composed of a distributed constant circuit and is capable of eliminating a first frequency component or a second frequency component. The second frequency is higher than the first frequency, and a second filtering unit that attenuates components of frequencies lower than the first frequency or components of frequencies higher than the second frequency.

Abstract: A small-sized and lightweight pointing device and receiving unit reduce power consumption. The receiving unit transmits UWB (Ultra Wide Band) signals simultaneously from an antenna thereof. The pointing device receives the transmitted UWB signals with three antennas thereof. The respective timings when the transmitted UWB signals are received with the three antennas depend on the distances between the transmitting antenna and the three receiving antennas. With this principle, propagation distances from the transmitting antenna to the three receiving antennas are real distances between the transmitting antenna and the three receiving antennas. By applying the principle of triangular surveying to the distances, position coordinates of the pointing device to the receiving unit can be specified. Amount of movement made by the pointing device is calculated based on a change in the position coordinates.

Abstract: A disclosed antenna apparatus includes: a punched out antenna element made of a sheet metal; a punched out ground element made of a sheet metal, the ground element facing the antenna element; and a surface mount type coaxial connector mounted across the antenna element and the ground element.

Abstract: An antenna apparatus includes a dielectric substrate having first and second rectangular regions on a surface of the dielectric substrate, an antenna element formed inside the first rectangular region, and a ground element formed inside the second rectangular region, the ground element having a proximity side positioned proximate to and along a borderline between the first and second rectangular regions. The antenna element includes a first elongation extending from a first end to a second end, the first end including a power feed part positioned proximate to a side edge of the proximity side, the second end being positioned proximate to an upper side of the first rectangular region facing the borderline, a second elongation extending from the second end in a direction along the upper side, and a stub part extending from the second end in a direction opposite to the extending direction of the second elongation.

Abstract: A communication apparatus is provided that includes an apparatus main frame, an antenna, and a connecting element that connects the antenna to the apparatus main frame and positions the antenna away from the apparatus main frame.

Abstract: An antenna device includes an antenna element to be fed with electric power from an external power supply and a ground element to be coupled to the antenna element. The antenna element and the ground element are formed of a conductive film and arranged to define a rectangular region in a plan view with at least one gap between the antenna element and the ground element. The antenna element has a shape of one of a polygon, a circle, and a part of the polygon or the circle. The antenna element includes a feeding part in its portion close to the ground element.

Abstract: A communication apparatus is provided that includes an apparatus main frame, an antenna, and a connecting element that connects the antenna to the apparatus main frame and positions the antenna away from the apparatus main frame.

Abstract: A mounting structure of an antenna device for mounting the antenna device composed of a ground part and an element part on an electronic apparatus is disclosed. The ground part is mounted on the electronic apparatus so as to be substantially overlapped with a conductive part of the electronic apparatus.

Abstract: The present invention discloses a method of manufacturing an electronic apparatus for wireless communications in that the method includes the steps of arranging an antenna apparatus adjacent to the electronic apparatus formed on a substrate and testing the electronic apparatus by conducting the wireless communications between the electronic apparatus and the antenna apparatus.

Abstract: An antenna apparatus is disclosed. The antenna apparatus is structured by a ground plate that is shaped like a plate, and a feeding unit that is formed by a plate-like member, the feeding unit extending from the ground plate generally perpendicular to the ground plate at a predetermined angle to the ground plate for a predetermined length.

Abstract: A shopping path tracking system is disclosed that comprises a terminal device, a fixed communication device, and a path management device. The fixed communication device wirelessly communicates with the terminal device, calculates a response time of the terminal device, and reports the calculated response time to the path management device. The path management device detects a position of the terminal device based on the response time reported from the fixed communication device, stores the detected position, and detects a travel path of the terminal device by tracking the stored positions.

Abstract: A disclosed antenna apparatus includes: a punched out antenna element made of a sheet metal; a punched out ground element made of a sheet metal, the ground element facing the antenna element; and a surface mount type coaxial connector mounted across the antenna element and the ground element.

Abstract: An antenna device includes a teardrop-shaped element including a cone-shaped part and a spherical surface part geometrically combined so that the spherical surface part is in contact with the cone-shaped part on its bottom-surface side; a ground plate opposed to the apex of the cone-shaped part of the teardrop-shaped element; and a coaxial line having an inside conductor connected to the apex of the cone-shaped part of the teardrop-shaped element and having an outside conductor connected to the ground plate. The ground plate defines a surface of a metal enclosure of a device to be connected to the antenna device, the device having at least one of a transmission function and a reception function.

Abstract: An antenna device includes an oval-shaped element which is formed by geometrically combining a spherical portion and a conical portion so that the spherical portion is tangent to a bottom side of the conical portion. A ground plate is arranged to face a vertex of the conical portion in the oval-shaped element. A coaxial line includes an inner conductor and an outer conductor, the inner conductor being connected to the vertex of the conical portion of the oval-shaped element and the outer conductor being connected to the ground plate. A conductive reflecting plate is arranged on the ground plate to reflect a receiving radio wave or a transmitting radio wave.

Abstract: A disclosed antenna apparatus includes: a punched out antenna element made of a sheet metal; a punched out ground element made of a sheet metal, the ground element facing the antenna element; and a surface mount type coaxial connector mounted across the antenna element and the ground element.

Abstract: An antenna apparatus is disclosed that includes an element member made of sheet metal, a ground member made of sheet metal, and a connection part that is integrally formed with the element member and the ground member.

Abstract: A communication device performs a radio communication in an ultra wideband with the use of the impulse radio system. The communication device includes a receiver. The receiver is equipped with antennas, a correlation circuit, and a CPU. The antennas receive send signals from a transmitter. The correlation circuit detects a synchronization pulse having a longer cycle than a highly redundant data pulse among received signals. The CPU performs a synchronization process based on the synchronization pulse. The CPU establishes a channel based on the synchronization pulse, and selectively changes the antennas according to the received signal. In the case where the receive signal has not been received for a given period of time after the synchronization is established correlation signals is stopped outputting to start a polling signal. The correlation signals are output to obtain correlation of the receive signals.

Abstract: An antenna apparatus includes an antenna case housing an antenna; a connector to be connected to a device which connector is electrically connected to the antenna; and an antenna case supporting mechanism which supports the antenna case and enables changing a position of the antenna case at least to a horizontal position and a vertical position.

Abstract: An actuator includes: a magnetic field generator that has different magnetic poles alternately arranged in a plane, with a predetermined position being the center of the magnetic poles; a coil holder that holds a plurality of coils that are radially arranged and face the magnetic field generator, relative motion being caused between the magnetic field generator and the coil holder; and an electromagnetic conversion unit that detects the relative motion and is mounted on either the magnetic field generator or the coil holder.