A novel reconfigurable dual-bandpass filter with independently controlled center frequencies and fixed bandwidths is presented. It was designed to be integrated as a RF anti-aliasing filter in a reconfigurable multi-bandpass sampling GNSS receiver. The center frequency tuning ranges are 1190-1210 MHz and 1560-1590 MHz in the lower and the upper L-bands, respectively, with a fixed bandwidths of 35 MHz. Varactor tuning technology associated with Open Loop Stub Loaded Resonator (OL-SLR) microstrip topology were investigated to achieve these goals. The proposed dual-bandpass filter design showed the agility to control independently the center frequencies in the two L-bands and to deactivate one of the passband. Furthermore, it shows enough flexibility to adapt to the deployment of new GNSS standards specifications. It exhibits on all the tuning ranges an insertion and a return losses of less than 4.5 dB and more than 10 dB, respectively