The substrate-integrated waveguide balance filter for wavelet/millimeter wave circuit comprises: a metal paster (1) on the media substrate (2), which has rectangular middle and Y-shaped ends; a row of first/second metal through holes (31)/(32) on side of paster midst edge; three rows of paralleled third/fourth/fifth metal through holes (33)/(34)/(35) between (31) and (32) on the paster middle line, and four couple of through holes on sides of the paster middle line arranged from the input end (4) to the first isolation end (5). |