I have developed a custom board with the DW1000 IC. Now, I am measuring the power spectrum of the DW1000 following the steps described in section 8.2.1 of the user guide.
I realized that the shape of the main lobe (the bandwidth) is almost the same as the one in the EVK1000 board, however, the sidelobes are quite different. In the EVK1000 there are lobes (with lower power than the main lobe, obiously) and in my board there are none of them. It is like there is a very restrictive pass band filter. This is a good thing but I cannot understand why is this happening. Does anyone have any idea about what is happening?