This diagram is a power attenuator realised with resistors.
This stage is often find in microwave synthesizer at the power output of the VCO.
do_tild=mdo_tild %scicos_solver=100 f_sin=2.4e9; T_sin=1/f_sin; Nsampl=50; Tsampl=T_sin/Nsampl; f_sin=2.4e9; Tfin=10*T_sin