Abstract:
A patch antenna 1 is comprised of a ground plate 3 provided on one surface of a dielectric plate 2, along with a patch 4 and a feeding line 5 for connection to the patch 4, each being provided on the other surface of the dielectric plate 2. In this patch antenna 1, an aperture 7 is provided on the ground plate 3 at a position, which is asymmetric about a center of the ground plate 3. By virtue of placing the aperture 7 on the ground plate 3 in an asymmetrical manner about the center of the ground plate 3, distribution of a return current becomes so asymmetric as to yield a common mode current. In this way, it is possible to implement the non-directional and broad-bandwidth characteristics.
Abstract:
A patch antenna 1 comprises a patch 4 and a patch feed line 5 provided on one surface of a dielectric plate 2 and a ground plate 3 having an aperture 7, which is positioned asymmetrically about the centre of the ground plate, provided on the other dielectric plate surface. Preferably the aperture is rectangular, has a circumference which is one wavelength of the patch resonant frequency, and is positioned on the half of the ground plane closest to the feed line. The aperture in the ground plane results in a stronger electric field being generated by the patch antenna and gives rise to an antenna with a decreased directivity but a broader bandwidth. The patch antenna may be used for connecting the units of a wireless LAN network (Figure 2).
Abstract:
PROBLEM TO BE SOLVED: To obtain a sacrificial film excellent in storage stability, filling property, adhesion and coating film uniformity and having high solubility in a stripping liquid. SOLUTION: A sacrificial film forming composition is used which comprises (A) a silicone resin which is a cohydrolytic condensation product of hydrolyzable silanes shown by the formula (1): X-Y-SiZ 3 and the formula (2) R n SiZ 4-n and is capable of crosslinking reaction through an organic crosslinkable functional group in the formula (1), (B) a crosslinking agent, (C) an acid generator and (D) an organic solvent. In the formula (1), Z denotes a hydrolyzable group; X is an unsubstituted hydroxyl group, a substituted or unsubstituted epoxy group or a substituted or unsubstituted organic crosslinkable functional group; and Y is a single bond, a divalent hydrocarbon group or a trivalent hydrocarbon group in the case of bonding to both two carbons constituting the epoxy group. In the formula (2), Z denotes a hydrolyzable group; R is H or a monovalent hydrocarbon group; and n is an integer of 0-3. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide an antireflection film material which ensures a higher etching selectivity than a resist, that is, a higher etching speed than the resist and has such properties that it can be removed without damaging a film to be processed, and to provide a pattern forming method in which an antireflection film layer is formed on a substrate using the antireflection film material, and a pattern forming method using the antireflection film as a hard surface mask blank for substrate processing. SOLUTION: An antireflection film forming composition is provided which comprises a polymer having a light absorbing group, a crosslinkable group and a non-crosslinkable group obtained by hydrolyzing and condensing one or more silicon compounds, an organic solvent and a crosslinking agent. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a computer which can realize performance essential for each unit such as communication performance, portability at the time of carrying the computer and availability in a state where it is put in a bag and which can be loaded with an option unit that can easily be attached/detached to/from the computer. SOLUTION: The computer can be loaded with an option unit such as a unit containing a radio LAN adapter. As the objective computer, a computer constituted of a computer main body, a display device and a keyboard or a notebook-sized computer 2 constituted of a computer main body provided with a keyboard and a display device acting as a cover that can freely be opened/ closed with respect to the computer main body is used. In the computer provided with such option unit 14, the option unit 14 is loaded onto the display device 11 attachably and detachably or the option unit is detachably loaded onto the computer at a place being the side of the display device when the cover is closed and at a place being the upper part of the display device when the cover is opened.
Abstract:
PROBLEM TO BE SOLVED: To realize a communication apparatus having satisfactory communication characteristics by making an antenna unit to be shared in a plurality of frequencies small in size and broad in band. SOLUTION: The antenna unit is provided with an inverted F-shaped antenna element with a feeding point and a ground connection point and a parasitic antenna element provided in order to resonate with the inverted F-shaped antenna element by electrostatic coupling. The antenna unit may further provided with a ground part grounded to a ground and connected with the ground connection point provided to one end of the Inverted F-shaped antenna element and a resonant element one end part of which is connected with the ground part and which is resonated by the parasitic antenna element by the electrostatic coupling. COPYRIGHT: (C)2004,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To miniaturize an inverted F-shaped antenna assembly 10 provided with two inverted F-shaped antennas 15, 25 for transmitting and receiving radio waves of different frequencies. SOLUTION: A first and second inverted F-shaped antennas 15, 25 have ground parts 16, 26 and radio wave resonance parts 18, 28, etc., as their respective elements formed on each side of an insulative board 12 in the form of conductor films. Thus the inverted F-shaped antenna assembly 10 is provided with the first and second inverted F-shaped antennas 15, 25 on a first and second sides 11, 21.
Abstract:
PROBLEM TO BE SOLVED: To provide a patch antenna having omnidirectivity and wide frequency band characteristics. SOLUTION: A patch antenna 1 is constituted by forming a bottom plate 3 on one surface of a dielectric plate 2, and a patch 4 ad a feeder 5 connected with the patch 4 on the other surface. In this patch antenna 1, an opening 7 is formed in the bottom plate 3, and the opening 7 is positioned asymmetrically to the center of the bottom plate 3. The opening 7 is formed in the bottom plate 3 asymmetrically to the center of the bottom plate 3 on that currents in a common mode can be generated by breaking the balance of feedback currents, and ommidirectivity and wide frequency band characteristics can be achieved.
Abstract:
PURPOSE: To suppress EMI radiation of frequencies by introducing delay times which are expected to be effective for EMI radiation frequencies. CONSTITUTION: A delay generator 10 is provided for selectively changing the delay time. Such a delay generator is connected to plural input data lines 20 and composed of a delay means, having plural delay routes for generating mutually different lengths of plural delay times, a register for holding the digital value of prescribed bits, and a selecting means for selecting one of delay routes and interposing it on the signal line corresponding to the digital value.
Abstract:
PURPOSE: To provide a portable computer which can easily and also cheaply reduce an electromagnetic wave noise emitted by an electric potential difference that is generated between a portable computer and a docking device for this portable computer, and the docking device for the portable computer. CONSTITUTION: A notebook type personal computer has a conductive contact part material 304 that is connected with the reference electric potential part of the personal computer main body inside a pair of recess parts 302 that are formed on the bottom separated from a connector, and a docking device has a conductive retaining riece 135A which is connected with the reference electric potential part of the docking device main body and can frequent from an opening 130A inside the opening 130A which is formed at the position that corresponds to the recess parts 302 of the personal computer when the personal computer is completely mounted. As the contact part material 304 and the retaining riece 135A are mounted on the position which is separated from the connector, the electric potential difference between the personal computer and the docking device can be removed.