自制简易6dBi全向天线

自制简易6dBi全向天线
Home-brew Compact 6dBi Collinear Antenna
(first published September 2005)


自制简易 6dBi 全向天线

（2005 年 9 月首次发表）




This page details the construction of an easy-to-make collinear 360 degrees omni-directional,
vertically polarised, antenna for 802.11b/g wireless networking. The antenna is very robust
and compact, and has a gain of approximately 5-6dBi.


本文详细介绍一个容易制作的 802.11b/g 垂直极化全向天线，该天线非
常坚固耐用，大约有 5-6dBi 的增益。

Background
Various websites detail the construction of a collinear antenna suitable for 2.4GHz wireless
networking, including wireless.gumph.org and guerrilla.net. However, these antennas
are quite complex to build, being made up of numerous short lengths of coax which must be
accurately cut to length. You also need to know the velocity factor of the coax that is being
used, as