 Given that the filter does not contain any resistive elements , the image impedance in the pass band of the filter is purely real and in the stop band it is purely imaginary . For example , for the pictured low @-@ pass half @-@ section , 
 Given that the filter <a href='uninflect' title='1'><mark>does</mark></a> not contain any resistive elements , the image impedance in the pass band of the filter <a href='drop_aux' title='2'><mark>is</mark></a>purely real and in the stop band it <a href='drop_aux' title='3'><mark>is</mark></a>purely imaginary . For example , for the pictured low @-@ pass half @-@ section , 
Given that the filter do not contain any resistive elements , da image impedance in tdapass band of thdailter purely real and in the stop band it purely imaginary . For example , for the pictured low @-@ pass half @-@ section ,