各波段天线集锦 YU1AW et

vodka

以下内容都是别人的劳动成果,  大家随便看


** 如果要说自己是原创, 也得有点新意才是

同样的东西别人不但做过了, 还测试得更严谨:
Efficient Feed for Offset Parabolic Antennas for 2.4 GHz By Dragoslav Dobričić, YU1AW

http://www.qsl.net/yu1aw/engl.htm
http://www.qsl.net/yu1aw/vhf_ant.htm

This article examines some of the possible solutions to the problems of efficiently illuminating SAT TV offset parabolic antennas in the use on WLAN frequencies of 2.4 GHz. The problems that occur while illuminating shallow offset parabolic dishes, in addition to those related to the efficient use of parabolic dishes generally are additionally aggravated by the specific geometry of the parabolic mirror itself. Feed positioning in the way that its phase center exactly coincides with the focus of the offset parabolic dish and its aiming so that the radiation maximum falls in the geometric center of the elliptic reflector surface are not intuitive at all, as in classic parabolic antennas. Therefore, there is much confusion and many wrongly positioned feeds that do not correctly illuminate offset parabolic dishes, decreasing their efficiency and gain.

完整的文章 http://yu1aw.ba-karlsruhe.de/fid24ghz.pdf



其他类似的:

http://www.xaviervl.com/Antenne/Bi-quad/index.html

rockplay

沙发啊  不容易我也坐上了

lqhp

怎么都要支持，顶一下！

随风飘逸

好贴，谢谢

vodka

顶上来自己看

bingogu

我唯独只对2.4g这个频段的感兴趣 其他无视

是否所有形状的天线 只要放大缩小相应尺寸 就能适应指定的频率（对电阻也有要求？）

80186

我唯独只对2.4g这个频段的感兴趣 其他无视

是否所有形状的天线 只要放大缩小相应尺寸 就能适应指定的频率（对电阻也有要求？）
bingogu 发表于 2009-4-17 08:44

正确！！

ddbegg

我唯独只对2.4g这个频段的感兴趣 其他无视

是否所有形状的天线 只要放大缩小相应尺寸 就能适应指定的频率（对电阻也有要求？）
bingogu 发表于 2009-4-17 08:44

同意这种看法