Development of FMCW SAR on L-band frequency for UAV payload

This study shows the simulation of FMCW-based Synthetic Aperture Radar on L-Band frequencies for UAV payload. In addition, in this research, a simulation design of filter system consisting of baseband filters, RF filters and low pass filter are produced. The simulation of design filter has the value of S
₁₁
maximum at 3 dB and the value of S
₂₁
minimum at 3dB at in the passband region. The type of filters used are a lumped element bandpass filter Cauer-Chebyshev 5
^th
order for baseband bandpass filter with passband frequency of 25-35 MHz, a microstrip filter with the size 25 mm × 35.8 mm with bandpass frequency from 1,265 GHz to 1,275 GHz for RF bandpass filter, and a low pass lumped element Cauer-Chebyshev filter 5
^th
order with a bandpass frequency below 35 MHz.