Three-pass band filter based on four-mode defective ground resonator

A technology of resonator and three-pass band, which is applied in the field of radio frequency microwave communication, can solve the problems of low pass-band selectivity and stop-band suppression of band-pass filters, and achieve high pass-band selectivity, high stop-band rejection, and narrow effect of size

Inactive Publication Date: 2019-03-26
X TRIP INFORMATION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The passband selectivity and stopband rejection of the bandpass filter in the prior art are not high, which cannot meet the needs of modern microwave communication systems

Method used

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  • Three-pass band filter based on four-mode defective ground resonator
  • Three-pass band filter based on four-mode defective ground resonator
  • Three-pass band filter based on four-mode defective ground resonator

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Embodiment Construction

[0032] In order to further explain the technical means and effects of the present invention to achieve the above objectives, the specific implementation, structure, features and effects of the present invention will be described in detail below in conjunction with the accompanying drawings and preferred embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0033] refer to figure 1 as shown, figure 1It is a schematic diagram of the overall structure of the three-pass band filter based on the four-mode defect ground resonator of the present invention. In this embodiment, the three-pass band filter proposed by the present invention includes a quadruple mode defective ground resonator (QMDGSR) 1, a radio frequency ground plane 2, two microstrip feeders 3 and a microstrip stepped impedance resonator (MSIR) 4 . The four-mode defective ground resonator 1 is etched on a...

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Abstract

Disclosed in the present invention is a quad-mode defected ground structure resonator-based triple-passband filter, comprising a PCB dielectric board, a quad-mode defected ground structure resonator, two microstrip feed lines, and a microstrip stepped impedance resonator. The quad-mode defected ground structure resonator comprises a first resonant cell and four second resonant cells; one end of each of the four second resonant cells is connected to one of four ends of the first resonant cell, respectively. Front ends of the two microstrip feed lines separately extend to an edge of the PCB dielectric board to form two ports; the two microstrip feed lines are symmetric about a first central axis; the distance between the tail ends of the two microstrip feed lines is shortened to form a source-load coupling feed structure. The microstrip stepped impedance resonator comprises two third resonant cells and a fourth resonant cell; two tail ends, close to the first central axis, of the two third resonant cells are separately connected to an open end of the fourth resonant cell. According to the triple-passband filter in the present invention, six transmission zeros can be generated, and high passband selectivity and stopband rejection are provided.

Description

technical field [0001] The invention relates to the technical field of radio frequency microwave communication, in particular to a three-pass band filter based on a four-mode defect ground resonator. Background technique [0002] In modern microwave communication systems, bandpass filters (BPF) need to have good selectivity, out-of-band rejection, wide stopband and miniaturized structure. Although the traditional multimode BPF based on loaded resonators has good selectivity, there are many parasitic passbands. A multimode resonator can generate multiple resonance modes through a single resonator. Therefore, the design of microwave devices using multimode resonators can effectively reduce the size of the device. Although multimode resonators have been proposed, they are only used in the design of broadband filters. The pass-band selectivity and stop-band rejection of the band-pass filter in the prior art are not high, which cannot meet the requirements of modern microwave c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01P1/20H01P1/203
CPCH01P1/20H01P1/203H01P1/20381
Inventor 彭彪邓力李书芳张贯京葛新科高伟明张红治
Owner X TRIP INFORMATION TECH CO LTD
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