A novel band-pass filter is designed and verified experimentally. The filter consists of five Sshaped slot-line resonators; which are aligned to form an array of coupled slots. The simulated filter pass-band is centered at 1.77 GHz with 0.6% bandwidth and with an exception of small frequency shift (20MHz) shows rather good agreement with measured data. Hightemperature superconducting (YBCO) film on 1mm thick LaAlO3 substrate us used to achieve low insertion loss (-0.6dB at 77K). The filter design is based on the full-wave model of coupled slots; which enables a possibility of quick and accurate circuit simulations using the duality principle.