公开(公告)号：DE59704206D1

公开(公告)日：2001-09-06

申请号：DE59704206

申请日：1997-09-08

Applicant: EPCOS AG

Inventor： SCHROPP ISIDOR ,  OSTNER HELMUT ,  MACHUI JUERGEN ,  BAIER THOMAS

IPC: H03H9/05 ,  H03H9/145

公开(公告)号：DE59704087D1

公开(公告)日：2001-08-23

申请号：DE59704087

申请日：1997-08-28

Applicant: EPCOS AG

Inventor： BAIER THOMAS ,  OSTNER HELMUT ,  SCHROPP ISIDOR

IPC: H03H9/145 ,  H03H9/64

公开(公告)号：DE19638399C3

公开(公告)日：2002-04-18

申请号：DE19638399

申请日：1996-09-19

Applicant: EPCOS AG

Inventor： SCHROPP ISIDOR ,  BAIER THOMAS ,  OSTNER HELMUT

IPC: H03H9/64

公开(公告)号：DE10012129A1

公开(公告)日：2001-10-11

申请号：DE10012129

申请日：2000-03-13

Applicant: EPCOS AG

Inventor： MUELLER PETER ,  OSTNER HELMUT ,  KREMS TOBIAS

IPC: H03H9/64 ,  H03H9/72 ,  H03H9/145 ,  H04B1/44

Abstract: The duplexer is based on surface wave filters elements with first and second Dual Mode SAW filters (F1,F2) as input and transmission filters and a first surface wave resonator (Res) in series between the first filter and the antenna. The resonator blocks in the transmission region of the second filter and is optimally conducting in that of the first filter. Connections (1,2,5,7) of the first and second filters are inductively coupled.