Adjustable resonator filter and method for adjusting coupling between resonator cavities
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United States of America Patent
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Aug 11, 2015
Grant Date -
Jan 10, 2013
app pub date -
Jun 14, 2012
filing date -
Jul 6, 2011
priority date (Note) -
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Abstract
The invention relates to an adjustable resonator filter, which has a casing made up of a bottom, walls and a lid, which casing functions as a ground for a transmission path, which is divided with conductive partitions into resonator cavities, and on the transmission path of the resonator filter there is a coupling opening in the partitions separating subsequent cavities. In the casing there is by at least one partition a coupling space, which is open into both resonator cavities separated by the partition, which resonator filter has an inductive coupling member. This is arranged to extend through said coupling space into both resonator cavities. The inductive coupling member is in electric contact with the casing at least in one of the resonator cavities. In the coupling space there is a moveable conductive adjustment piece, which has a minimum position for the coupling and a maximum position for the coupling.
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