@Nitr0
Please see my January 2016 post quoted below.
This was when I received my FA antenna and replaced Pepsi Can Antenna (Cantenna) by it. I was shocked to see that the performance dropped drastically. I thought it is either defective N connector or defective FA antenna. Finally I discovered that FA antenna sucks a lot more noise than the Cantenna, and saturated the dongle, causing drastic drop in performance. I then purchased FA filter and after adding it, the performance of FA antenna jumped up dramatically.