Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Four-mode and dual-frequency filter with coupling dual-ring structure

A filter and dual-mode resonator technology, applied in waveguide devices, electrical components, circuits, etc., can solve the problem that single-band communication systems cannot satisfy wireless communication well, and achieve the effect of improving passband selectivity

Inactive Publication Date: 2014-12-24
SOUTH CHINA UNIV OF TECH
View PDF1 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the limited spectrum resources that people can use, especially the increasingly prominent contradiction between radio frequency and microwave frequency band resources and application requirements, single-band communication systems can no longer meet the needs of wireless communication well.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Four-mode and dual-frequency filter with coupling dual-ring structure
  • Four-mode and dual-frequency filter with coupling dual-ring structure
  • Four-mode and dual-frequency filter with coupling dual-ring structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0025] The present invention will be further described below in conjunction with specific examples.

[0026] Such as figure 1 As shown, the four-mode / dual-frequency filter using a coupled double-loop structure described in this embodiment is mainly composed of an inner-ring dual-mode resonator 2 using a cut-angle perturbation 1 and an outer-ring dual-mode resonator using a patch perturbation 3 The resonators 4 are nested and coupled, wherein a pair of orthogonal T-shaped coupling feeders 5 and 6 are arranged on the outside of the outer ring dual-mode resonator 4, and the pair of orthogonal T-shaped coupling feeders 5 and 6 are respectively composed of 50 Ohmic microstrip lines 7, 8 feed directly.

[0027] For the traditional closed-loop dual-mode resonator using patch perturbation, the elliptic characteristics with transmission zeros on both sides of the dual-mode passband are produced. In the traditional external loop dual-mode resonator using patch perturbation, a In the ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a four-mode and dual-frequency filter with a coupling dual-ring structure. The four-mode and dual-frequency filter with the coupling dual-ring structure mainly is mainly formed by an inner ring dual-mode resonator with corner cut perturbation and an outer ring dual-mode resonator with patch perturbation in an embedded coupling mode, a pair of orthogonal T-shaped coupling feeder lines is arranged on the outer side of the outer ring dual-mode resonator, and the two orthogonal T-shaped coupling feeder lines are respectively and directly fed through a 50-ohm microstrip line. Because the four-mode and dual-frequency filter with the coupling dual-ring structure includes mode frequency control and further includes zero-point control, the passband selectivity is improved, a stop band inhibition effect is improved, the design requirement of a small, high-selectivity and controllable multi-mode / dual-frequency system can be met, and the filter can be applied to microwave electronic systems of mobile communication, radar, remote sensing and the like.

Description

technical field [0001] The invention relates to the technical field of coupled double-loop resonators, in particular to a four-mode / double-frequency filter adopting a coupled double-loop structure. Background technique [0002] Along with the wave of information revolution, wireless communication technology has entered a period of rapid development in recent years. How to develop a filter with high performance, small size, light weight and low cost is a new challenge for developers. Multimode filter is one of the most effective methods for miniaturization of microwave bandpass filter. There may be many modes in a resonator, so it is possible to use some of them to form a resonator multi-resonance mode circuit, so One resonator can replace multiple resonators, reducing size, weight and cost. Therefore, the study of planar multimode filters has important theoretical research value and application potential. Due to the limited spectrum resources that people can use, especial...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): H01P1/203
Inventor 褚庆昕张智翀
Owner SOUTH CHINA UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com