公开(公告)号：US20190237837A1

公开(公告)日：2019-08-01

申请号：US16336801

申请日：2016-09-26

Applicant: SAAB AB

Inventor： Hans-Olof VICKES

IPC: H01P1/20 ,  G01R29/08

CPC classification number: H01P1/20 ,  G01R29/08 ,  H01P1/20363

Abstract: The filter unit has a center frequency and comprises a first dielectric substrate, a first conducting plane, and at least one transmission arrangement. The at least one transmission arrangement comprises a shunt node which has a shunt connection to the conducting plane. The electrical length of the shunt connection defines the center frequency of the filter unit. The transmission arrangement further comprises a plurality of transmission lines connected in series between an input port and an output port, wherein each port is connectable to auxiliary systems with a system impedance. Moreover, each transmission line has a characteristic impedance and wherein the characteristic impedance of each transmission line is less than the system impedance.