Lowpass filter using offset double-sided parallel-strip lines
A novel lowpass filter using offset double-sided parallel-strip lines (DSPSL) is proposed. The proposed lowpass filter has the advantages of enhanced stopband and high power-handling capability compared with the conventional microstrip lowpass filter, because the high impedance is realised by offsetting the top and bottom strips of DSPSL without decreasing the width of strips. The theoretical and measured results are presented.