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Filter splitter with dual passbands

A dual-pass band and power divider technology, applied in waveguide devices, electrical components, connecting devices, etc., can solve the problems of sacrificing frequency selectivity, large volume, etc., achieve ideal out-of-band suppression, realize volume, and improve frequency selection sexual effect

Inactive Publication Date: 2017-01-11
SOUTH CHINA UNIV OF TECH
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

For the integration of power splitters and bandpass filters, most of the input ports of Wilkinson power splitters are replaced by coupled feeders. Although a high degree of isolation is obtained, this requires sacrificing frequency selectivity and requiring very large volume

Method used

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  • Filter splitter with dual passbands
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  • Filter splitter with dual passbands

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Embodiment Construction

[0019] The present invention will be described in further detail below in conjunction with the accompanying drawings, but the scope of protection claimed by the present invention is not limited to the scope of the following examples.

[0020] Filter power splitter with double passband, including upper microstrip structure, isolation element, middle layer dielectric substrate and lower layer grounded metal plate: the upper layer microstrip structure is attached to the upper surface of the middle layer dielectric substrate, and the lower surface of the middle layer dielectric substrate is the lower layer Grounded metal plate; the upper microstrip structure includes step impedance resonators realized by two quarter-wavelength microstrip lines and four coupled feed lines; two of the coupled feed lines share an input port as a filter with dual passbands The input port of the splitter, and the middle part of the other two coupled feed lines are respectively connected with two output ...

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Abstract

The invention discloses a filtering power divider with double passing bands. An upper micro-strip structure comprises two phase step impedance resonators and four coupling feeder lines, wherein the phase step impedance resonators are achieved through quarter-wavelength micro-strip lines. By the phase step impedance resonators and the novel coupling feeding mode, equal power distribution can be ideally achieved, and double-passing-band filtering characteristics of wide stop bands are achieved. Meanwhile, the edge of each passing band is provided with two transmission zero points, and frequency selectivity can be improved. According to the filtering power divider with the double passing bands, two important element filters at the radio frequency front end and the power divider are integrated, the size is reduced, integration is facilitated, total insertion loss is reduced, and extensive use is achieved. The filtering power divider has novelty, creativity and practicality.

Description

technical field [0001] The invention relates to a filter power divider with double passbands, which can be applied to an equal-division power divider with a band-pass filter function in a radio frequency front-end circuit, and this technology is required in many circuits that require power equalization and band-pass filter . Background technique [0002] Filters and power splitters are two very important components in wireless communication systems. In most RF front-ends, these two devices work at the same frequency and are required to provide ideal characteristics for the signal. If these two devices are integrated into a single device, the overall volume and insertion loss will be reduced together. [0003] In recent years, some scholars have focused on integrating multiple functional circuits in one circuit. For the integration of power splitters and bandpass filters, most of the input ports of Wilkinson power splitters are replaced by coupled feeders. Although a high d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01P5/16
Inventor 章秀银高立李杨赵小兰
Owner SOUTH CHINA UNIV OF TECH
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