Author here, based on what you are trying to listen, different antennas may be better than others.
I use a discone antenna at home, but the picture you see on the blog was made with a wire antenna not especially dedicated to sats (a 2m/70cm wire JPole) outdoor.
Keep in mind that the signal from the satellite will be polarised, and that the polarisation will change as the satellite moves through the sky. To get the best results you will need to rotate your yagi to find the best polarisation.
It says a "simple wire antenna" is good enough in most cases, but I'm sure you could get a much clearer signal with something specialized.