Each sector of the antenna needs to be a 1/2 wavelength long multiplied by the velocity factor of the cable. The velocity factor of RG-213 is 0.66 . If you decide to use different cable (such as LMR-400) then you need to get the velocity factor of that cable (which will be different), and recalculate all the dimensions.
V * C 0.66 * 2997924581/2 wavelength = ------ = ---------------- = 0.0405m = 40.5mm 2 * F 2 * 2441000000 V = Velocity Factor of RG213 = 0.66C = speed of light = 299792458F = Frequency of Signal = 2441000000 (middle of 2.4ghz range) 作者: a123456b789 時間: 2011-5-7 20:06
哎呀 - 找不到網頁作者: arvid 時間: 2011-10-18 21:44
很抱歉....