MICROSTRIP DIPLEXER Russian patent published in 2019 - IPC H01P1/203 

FIELD: radio equipment.

SUBSTANCE: microstrip diplexer relates to radio engineering. Microstrip diplexer comprises a dielectric substrate, on one side of which there is a grounded base, and a second side is coated with strip conductors of resonators and a U-shaped conductor of a matching circuit, wherein the resonators form low-frequency and high-frequency channel filters, one end of the matching circuit is short-circuited, and to the second end, the common input of the diplexer is connected, the input resonators of the channels are connected to the matching circuit electromagnetically. Lengths of strip conductors of resonators of low-frequency and high-frequency channels are equal l₁=7.87 mm and l₂=7.73 mm, l₃=5.45 mm and l₄=5.87 mm, overall length and width of U-shaped conductor of matching circuit l_c=7.15 mm and w_c – 1.50 mm respectively, signal conductors of output 2 and output 3 are connected directly to strip conductors of output resonators at points at distances l_t1=1.80 mm and l_t2=1.18 mm from grounded ends of conductors of resonators.

EFFECT: reduced size of diplexer and improved matching of its common port.

1 cl, 2 dwg