Patch antenna
    1.
    发明专利

    公开(公告)号:GB2345197B

    公开(公告)日:2003-12-24

    申请号:GB9922529

    申请日:1999-09-24

    Applicant: IBM

    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.

    Patch antenna with an apertured ground plane

    公开(公告)号:GB2345197A

    公开(公告)日:2000-06-28

    申请号:GB9922529

    申请日:1999-09-24

    Applicant: IBM

    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).

    Sacrificial film forming composition, pattern forming method, sacrificial film and method for removing the same
    3.
    发明专利
    Sacrificial film forming composition, pattern forming method, sacrificial film and method for removing the same 有权
    真空膜成型组合物,图案形成方法,透明膜及其移除方法

    公开(公告)号:JP2005352107A

    公开(公告)日:2005-12-22

    申请号:JP2004172270

    申请日:2004-06-10

    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 translation: 要解决的问题:获得在剥离液中的储存稳定性,填充性,粘附性和涂膜均匀性以及高溶解性优异的牺牲膜。 解决方案:使用牺牲膜形成组合物,其包含(A)由式(1)所示的可水解硅烷的共水解缩合产物的硅氧烷树脂:XY-SiZ 3和/ 通式(2)中R 2具有式(1)中的有机交联性官能团,(B)交联剂, (C)酸产生剂和(D)有机溶剂。 在式(1)中,Z表示可水解基团; X是未取代的羟基,取代或未取代的环氧基或取代或未取代的有机交联官能团; 在与构成环氧基的两个碳结合的情况下,Y为单键,二价烃基或三价烃基。 在式(2)中,Z表示可水解基团; R为H或一价烃基; n为0-3的整数。 版权所有(C)2006,JPO&NCIPI

    COMPUTER LOADED WITH OPTION UNIT
    5.
    发明专利

    公开(公告)号:JP2001051749A

    公开(公告)日:2001-02-23

    申请号:JP21717099

    申请日:1999-07-30

    Applicant: IBM

    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.

    PATCH ANTENNA AND ELECTRONIC EQUIPMENT USING THE SAME

    公开(公告)号:JP2000196341A

    公开(公告)日:2000-07-14

    申请号:JP36675798

    申请日:1998-12-24

    Applicant: IBM

    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.

    DELAY GENERATING DEVICE, DATA PROCESSING SYSTEM AND DATA TRANSMISSION SYSTEM

    公开(公告)号:JPH07297691A

    公开(公告)日:1995-11-10

    申请号:JP8845494

    申请日:1994-04-26

    Applicant: IBM

    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.

    PORTABLE COMPUTER AND DOCKING DEVICE FOR PORTABLE COMPUTER

    公开(公告)号:JPH0784689A

    公开(公告)日:1995-03-31

    申请号:JP22176193

    申请日:1993-09-07

    Applicant: IBM

    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.

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