2009/08/09 11:50 | by 孤城浪子的老婆 ]
这些威客凭介自己的技术通过互联网，把自己的能力、技术和智慧淋漓尽致的发挥出来，去帮助有需求的人，从而为自己创造收益。他们靠自己的智慧和能力吃饭，是真正的威客一族。
但有些人，把威客理解片面话，把威客做为网赚的一种形式，延伸出威客网赚，建立自己的网站，把一些低级的任务发布出来。比较常见的有“网上发贴赚钱”、“网上打字赚钱”等。更有甚者利用威客一词做起来原本无利可图的SP短信联盟。如果你想做威客，就用手机注册，一来一回的需要发几次，手机话费自然就被扣掉，最后没有做成威客，也没有接到任务反丢了几元钱的话费。 这样的事经常发生在网赚新手身上，为了赚钱，哪怕对此有些质疑也不惜亲身试验一下。目前，此类信息很多，天赚网赚论坛每天都有大量的威客信息，无奈只能开启了发贴验证。
威客网赚是骗子吗？威客网赚是不是真的？其实这些用不着说了，朋友们在这个互联网上只认准一条就行：“天下没有免费的午餐，钱没那么好赚”就行了。 试想，如果做个没技术含量的威客网赚，发发贴子，打打字就可以日赚百元？这钱来的太容易了吧。所以新手做网赚，请多看资料，先了解这个行业再下手不迟。不要被一些冠冕堂皇的话语所蒙蔽。
2009/07/30 22:40 | by 孤城浪子 ]
下载文件 (已下载 1387 次) 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
2009/07/30 22:16 | by 孤城浪子 ]
2009/07/30 22:06 | by 孤城浪子 ]
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)
