公开(公告)号：US06608537B2

公开(公告)日：2003-08-19

申请号：US09855304

申请日：2001-05-15

申请人： Seiji Kanba ,  Naoki Mizoguchi ,  Hisatake Okamura ,  Harufumi Mandai

发明人： Seiji Kanba ,  Naoki Mizoguchi ,  Hisatake Okamura ,  Harufumi Mandai

IPC分类号： H01D1203

CPC分类号： H01P1/20381 ,  H01P7/082

摘要： A band-pass filter includes a metal film provided on a dielectric body. The shape and size of the metal film and the coupling points of input-output coupling circuits are selected such that first and second resonance modes are generated. The metal film has protruding portions or concavities provided thereon such that resonance electric field strength in the first or second resonance mode is controlled to couple the first and second resonance modes to each other.