"If one wants to make it more sensitive to certain frequencies than to others, one needs to add a resonant circuit, usually a combination of an inductor and a c

"If one wants to make it more sensitive to certain frequencies than to others, one needs to add a resonant circuit, usually a combination of an inductor and a capacitor" Coincidentally for OP, the ideal antenna element length for a 2.4 ghz dipole antenna is around an inch and a quarter, which handwavy looks like about how long his diode leads are. Even a pitiful attempt at a tiny air wound coil choke would decouple his scope probe wires from interfering with the natural dipole antenna pattern. I bet, that if OP decoupled his scope probe wires, he could plot the natural radiation pattern of a dipole by rotating the diode and its antenna around and noting the voltage on the scope at various angles relative to the transmitter. If I have time I'll try that in the lab today just for fun. All it'll take is a couple inches of hookup wire... OR more sneakily could coil the diode leads themselves at the correct distance from the diode... Or I could tack solder some coaxial cable and BNC connector with a sloppy homemade choke balun ... hmm... I bet for TWO EUR I could plot antenna radiation patterns pretty reliably. I wonder if OPs mouse has a horizontal or vertical polarized antenna? I bet I can test that for two EUR.