A three-pass band power divider filter

Abstract

The invention discloses a three-pass band power dividing filter, which comprises an upper dielectric substrate and a lower metal grounding plate, one short side of the dielectric substrate is provided with an input port feeder, and two long sides of the dielectric substrate are respectively provided with first ports. The output feeder and the second port output feeder, the sixth E-type three-mode resonator, the fourth E-type three-mode resonator and the first E-type three-mode resonator are respectively arranged between the second output port feeder and the input port feeder device, the fifth E-type three-mode resonator, the third E-type three-mode resonator and the second E-type three-mode resonator are respectively arranged between the first port feeder and the input port feeder, and the second E-type three-mode resonator An isolation resistor is provided between the three-mode resonator and the first E-type three-mode resonator, an isolation resistor is provided between the fourth E-type three-mode resonator and the third E-type three-mode resonator, and the sixth E-type three-mode There is an isolation resistor between the resonator and the fifth E-type tri-mode resonator.

Description

technical field [0001] The invention relates to the technical field of microwave passive devices, in particular to a three-pass band power dividing filter. Background technique [0002] In modern wireless communication systems, power dividers and filters are important RF front-end passive components. In order to realize power distribution and filtering functions at the same time, they are often designed in the circuit in a cascaded manner. In this way, not only the circuit The volume will increase, and the circuit performance will decrease. Therefore, in order to reduce the size of the circuit and improve the performance of the circuit, the research of the power divider with filter response has been explored in recent years. At the same time, with the continuous development of modern wireless communication systems, the demand for multi-passband communication systems is also increased. [0003] Document 1 [K.J.Song, M.Y.Fan, and F.Zhang, "Compact Tripe-Band Power DividerInt...

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Problems solved by technology

[0007] In order to solve the problem of large volume and poor performance of the circuit, the present invention discloses a method of coupling the resonator with the input and output feeders to realize the function of the three-pass band power divider filter, including the dielectric substrate on the upper part and the metal grounding plate on the lower part , one short side of the dielectric substrate is provided with an input port feeder, and the two long sides of the dielectric substrate are respectively provided with a first port output feeder and a second output feeder, and a sixth E-type feeder is arranged between the second output feeder and the input port feeder. A three-mode resonator, a fourth E-type three-mode resonator, and a first E-type three-mode resonator, and a fifth E-type three-mode resonator, a third E-type three-mode resonator, and a third E-type three-mode resonator are respectively arranged between the first port feeder and the input port feeder. Type three-mode resonator and the second E-type three-mode resonator, a first isolation resistor is arranged between the second E-type three-mode resonator and the first E-type three-mode resonator, and the fourth E-type three-mode resonator There is a second isolation resistor between the device and the third E-type three-mode resonator, and a third isolation resistor between the sixth E-type three-mode resonator and the fifth E-type three-mode resonator

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