[不指定 2010/05/30 02:09 | by 孤城浪子 ]

Microsoft Office 2010 套件 具有五个版本 — 三个用户版本和两个企业版本 —  具体取决于组织的需要和许可要求。这些版本包括:

  • Microsoft Office  Home and Student 2010

  • Microsoft Office  Home and Business 2010

  • Microsoft  Office Standard 2010

  • Microsoft Office  Professional 2010

  • Microsoft Office  Professional Plus 2010

Office 2010 版本比较

下表对 Office 2010 套件、产品和功能进行了比较。

程 序、产品和功能Home and Student Home and Business StandardProfessionalProfessional  Plus

许可

零售

零售

批 量

零售

批量

Microsoft  Excel 2010

Microsoft  OneNote 2010

Microsoft  PowerPoint 2010

Microsoft  Word 2010

Microsoft  Outlook 2010

Microsoft  Publisher 2010

Microsoft  Access 2010

Microsoft  Communicator 2010

Microsoft  InfoPath 2010

Microsoft  SharePoint Workspace 2010

Office  2010 具有 32 位和 64 位版本。有关特定要求的列表,请参阅 Office  2010 的系统要求


[不指定 2009/07/30 22:40 | by 孤城浪子 ]
2.4G全向天线资料

Tags:
[不指定 2009/07/30 22:33 | by 孤城浪子 ]

圆筒天线的直径、振子、长度的计算值可在下面网页直接输入计算,网址:http://www.saunalahti.fi/elepal/antenna2calc.php
             相关WIFI天线制作网站:
             http://hi.baidu.com/ichi/blog/item/361ccaea1674d9d3d439c900.html
             http://www.binarywolf.com/249/
             http://www.qsl.net/ve3rgw/corner.html
             http://www.turnpoint.net/wireless/cantennahowto.html
             http://trevormarshall.com/biquad.htm
             http://www.xaviervl.com/Antenne/Bi-quad/index.html
             http://www.usbwifi.orcon.net.nz/
             几个制作2.4GHZ天线的网站
             http://www.saunalahti.fi/elepal/antennie.html
             http://www.frars.org.uk/cgi-bin/render.pl?pageid=1058
             http://martybugs.net/wireless/biquad/
             http://trevormarshall.com/waveguides.htm
             http://www.guerrilla.net/gnet_2_4ghz.html
             http://seattlewireless.net/index.cgi/CardboardHorn

            

http://www.dlinkbbs.com/forum-74-1.html要注册,还不错

            

http://www.meshmea.net/articles/wlan/index.html
             http://www.meshmea.net/articles/wlan/antenna/diy/index.html

            

Tags:
[不指定 2009/07/30 22:16 | by 孤城浪子 ]
Wi-Fi 2.4G 15DBi全向天线图纸
下载文件 (已下载 780 次)

Tags:

来源:http://info.awmn.net/users/images/stories/Library/Handmade/helical-helix%20antenna%202_4%20GHz%20HOWTO.htm

有空再翻译

Abstract  
The helix antenna, invented in the late fourties by John Kraus (W8JK), can  be considered as the genious ultimate simplicity as far as antenna design is  concerned. Especially for frequencies in the range 2 - 5 GHz this design is very  easy, practical, and, non critical. This contribution describes how to produce a  helix antenna for frequencies around 2.4 GHz which can be used for e.g. high  speed packet radio (S5-PSK, 1.288 Mbit/s), 2.4 GHz wavelans, and, amateur  satellite (AO40). Developments in wavelan equipment result in easy possibilities  for high speed wireless internet access using the 802.11b (aka WiFi) standard.  
  

Theory in a birds eye  view
The helix antenna can be considered as a spring with  N turns with a reflector. The circumference (C) of a  turn is approximately one wavelength (l), and, the distance  (d) between the turns is approx. 0.25C. The size of the  reflector (R) is equal to C or l, and can be a  circle or a square. The design yields circular polarization (CP), which can be  either 'right hand' or 'left hand' (RHCP or LHCP respectively), depending upon  how the helix is wound. To have maximum transfer of energy, both ends of the  link must use the same polarization, unless you use a (passive) reflector in the  radio path.
The gain (G) of the antenna, relative to an  isotrope (dBi), can be estimated by:  

G = 11.8 + 10 * log {(C/l)^2 * N *  d}  dBi                (1)  

Tags:
 
分页: 4/17 第一页 上页 1 2 3 4 5 6 7 8 9 10 下页 最后页 [ 显示模式: 摘要 | 列表