How to suppress radio frequency interference in power DTU?

Suppressing DTU radio frequency interference requires optimized antenna design and filtering. A high-gain directional antenna is selected to reduce sidelobe radiation. A bandpass filter is deployed at the RF front end, with its center frequency within the operating band. A PBZ1608E600Z0T ferrite bead is connected in series with the power line to suppress power supply noise modulation. The module uses a metal shield with conductive pads installed at the gaps. The radiated spectrum is monitored using a spectrum analyzer to optimize filter parameters. After suppression, out-of-band radiation should be below -30dBc to meet radio management requirements.