MISCROSTRIP DIPLEXER Russian patent published in 2013 - IPC H01P1/213 

FIELD: electrical engineering.

SUBSTANCE: miscrostrip diplexer contains dielectric substrate; one side of the substrate is metalised and functions as earthed base, on the other side there are strip conductors forming bimodal cavities and three capacitors connecting three ports with the outermost dual-mode resonators. One of strip conductors is T-shaped and frequencies of its first two oscillation modes are aligned to the central frequencies of pass bands in low-and high-frequency channels. Remaining strip conductors are split partially by longitudinal slot at the one end and belong to one of two groups that form pass bands in low-and high-frequency channels where splitted strip conductors interconnected electromagnetically and connected with T-shaped strip conductor.

EFFECT: improvement of frequency-selective properties of diplexer due to as close as possible location to the pass band frequency in low- and high-frequency channels.

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