FIELD: physics.
SUBSTANCE: invention relates to high and super high frequency equipment; it can be used, for example, in selective paths of transmitter-receiver systems. Effect is attained due to availability of insulating substrate in the filter; one side of substrate is covered with earth grounded primer, on the other side there are short-circuit strip conductors forming quarter-wave resonators. Resonators are made with wave impedance jump formed both by width jump of strip conductor and by substrate location only under wide sections of strip resonators arranged in resonators. Narrow frame grounded sections of strip conductors forming resonators are made at suspended part of substrate. Besides, between resonators there is auxiliary conductive coupling arranged either as common sections along length of adjacent narrow sort-circuit sections of strip conductors or as sections connected by strip line section with each other.
EFFECT: reduction of substrate size, widening of filter pass band and suppression band.
3 dwg
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