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Dual-band band-rejection filter based on defected microstrip structure and defected ground structure

A technology of defective ground structure and band-rejection filter, which is applied in waveguide devices, electrical components, circuits, etc., can solve the problems that the selection characteristics need to be improved, the volume is large, and the independent adjustment cannot be realized, and the structure is compact and the selection characteristics are improved. , to meet the effect of miniaturization

Active Publication Date: 2015-10-07
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing dual-band band-stop filter designed by using the defect structure is still relatively large in size, and the center frequency and bandwidth of the two stop bands are related to each other. When one of the center frequencies is adjusted, the other center frequency also changes. When one bandwidth changes, the other bandwidth also changes, and independent adjustment cannot be achieved; in addition, the selection characteristics of the existing dual-band band-stop filters still need to be improved, so researchers need to further explore and study

Method used

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  • Dual-band band-rejection filter based on defected microstrip structure and defected ground structure
  • Dual-band band-rejection filter based on defected microstrip structure and defected ground structure
  • Dual-band band-rejection filter based on defected microstrip structure and defected ground structure

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Embodiment 1

[0039] Embodiment 1 of the present invention: a dual-band band-stop filter based on a defective microstrip structure and a defective ground structure, such as figure 1 , figure 2 , Figure 5 , Figure 6 , Figure 12 As shown, it includes: a dielectric substrate 1, a metal plated ground plate 2 disposed on the bottom surface of the dielectric substrate 1, and a metal microstrip line 3 disposed on the dielectric substrate 1, and the ground plate 2 and the microstrip line 3 are engraved with The corrosion has a δ-shaped defect structure. Both the ground plate 2 and the microstrip line 3 are etched with two δ-shaped defect structures, the two δ-shaped defect structures on the ground plate 2 are cascaded, and the two δ-shaped defect structures on the microstrip line 3 couplet. The δ-shaped defect structure is a δ-shaped groove, including A groove line 101, B groove line 102, C groove line 103, D groove line 104, E groove line 105, F groove line 106 and G groove line 107. The...

Embodiment 2

[0040] Embodiment 2: A dual-band band-rejection filter based on a defective microstrip structure and a defective ground structure, including: a dielectric substrate 1, a metal-plated ground plate 2 disposed on the bottom surface of the dielectric substrate 1, and a metal microstructure disposed on the dielectric substrate 1. The stripline 3, the ground plate 2 and the microstrip line 3 are all etched with δ-shaped defect structures. Both the ground plate 2 and the microstrip line 3 are etched with two δ-shaped defect structures, the two δ-shaped defect structures on the ground plate 2 are cascaded, and the two δ-shaped defect structures on the microstrip line 3 couplet. The δ-shaped defect structure is a δ-shaped groove, including A groove line 101, B groove line 102, C groove line 103, D groove line 104, E groove line 105, F groove line 106 and G groove line 107. The two ends of the B slot line 102 are respectively connected with one end of the A slot line 101 and the C slot...

Embodiment 3

[0041]Embodiment 3: A dual-band band-rejection filter based on a defective microstrip structure and a defective ground structure, including: a dielectric substrate 1, a metal-plated ground plate 2 disposed on the bottom surface of the dielectric substrate 1, and a metal microstrip disposed on the dielectric substrate 1. The stripline 3, the ground plate 2 and the microstrip line 3 are all etched with δ-shaped defect structures. The δ-shaped defect structure is a δ-shaped groove, including A groove line 101, B groove line 102, C groove line 103, D groove line 104, E groove line 105, F groove line 106 and G groove line 107. The two ends of the B slot line 102 are respectively connected with one end of the A slot line 101 and the C slot line 103, the two ends of the D slot line 104 are respectively connected with one end of the E slot line 105 and the other end of the C slot line 103, and the F slot line The two ends of line 106 are connected with one end of G groove line 107 and...

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Abstract

The invention discloses a dual-band band-rejection filter based on a defected microstrip structure and a defected ground structure, and the filter comprises a dielectric substrate (1), a metal coating grounding plate (2) disposed on the dielectric substrate (1), and a metal microstrip line (3) disposed on the dielectric substrate (1). The metal coating grounding plate (2) and the metal microstrip line (3) are respectively provided with a delta-shaped defected structure in an etched manner. The metal coating grounding plate (2) and the metal microstrip line (3) are respectively provided with one delta-shaped defected structure in the etched manner, thereby forming the filter, and effectively improving the selectivity of the filter. In addition, the center frequencies of two stop bands of the filter can be adjusted independently through the change of the lengths of the defected microstrip structure and defected ground structure, and two widths can be adjusted independently through the change of the tilt width of the defected microstrip structure and defected ground structure.

Description

technical field [0001] The invention relates to a dual-band band-stop filter, in particular to a dual-band band-stop filter based on a defect microstrip structure and a defect ground structure. Background technique [0002] In RF microwave systems, high-performance band-stop filters can be used to suppress noise and ensure efficient transmission of useful signals. Traditional band-stop filters are realized by connecting open stubs in parallel, but the area of ​​the open-circuit stub band-stop filters is often too large, which cannot meet the miniaturization requirements of microwave devices. Therefore, subsequent researchers have proposed a variety of band-stop filter structures, including coupled structure band-stop filters, graded step impedance resonator filters, M-shaped defect microstrip structure filters, and pi-shaped defect microstrip structure band-stop filters. device. Other researchers combined the defect microstrip structure and the coupled-feed spiral resonato...

Claims

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Application Information

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IPC IPC(8): H01P1/203
Inventor 喇东升贾守卿马雪莲
Owner NORTHEASTERN UNIV
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