双线J极子天线的制作和测试 J极子(J-Pole)天线由一个1/2波发射元(右图A部分)和一个1/4波驱动匹配器(右图B部分)构成,它等价于一个从末端驱动的偶极天线,因其导体呈J型,故称为J极子。右图是用300欧姆电视天线扁馈线制作的J极子天线(适用于30W以下,简称双线J极子天线)。 双线J极子天线有容易制作、便于携...
The Copper Cactus J pole antenna design is a simple amateur radio antenna model that will allow you to operate both bands with good performance, it is easy to make and the web offer several projects and examples we have collected here below for your reference. 仙人掌模样的铜制J极天线设计是...
As I wanted my units to fit in a small case I had, I switched from having the antenna transmission leads being 10mm apart and 10mm long to only being 6mm and 6mm, then tested for optimum tuned antenna lengths for that configuration. Here is a boiled down summary of the results from my...
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Future plans The collectd graphs show that when things are not so busy (from midnight till 5 in the morning, less than 100 aircraft seen) the percentage of received positions and the maximum distance increase. This leads to the thought that by dividing the antenna pattern in 4 areas and fe...