Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

High-selectivity wide-stopband balance filter based on slot line

A balanced filter, high-selectivity technology, applied in waveguide-type devices, circuits, electrical components, etc., can solve the problem that differential transmission cannot achieve high selectivity of stop-band suppression range at the same time, so as to improve stop-band suppression range, reduce Small area, the effect of reducing loss

Active Publication Date: 2019-08-16
HUAZHONG UNIV OF SCI & TECH
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Aiming at the defects of the prior art, the purpose of the present invention is to provide a slot-based high-selectivity wide stop-band balanced filter, which aims to solve the problem of differential bands realized by microstrip odd-even mode circuits or conventional slot-line architectures in the prior art. When the pass-through transmission characteristics and wide-band common-mode rejection characteristics are used, the differential transmission cannot simultaneously achieve a sufficiently wide suppression range in the stopband and high selectivity in the passband

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
  • High-selectivity wide-stopband balance filter based on slot line
  • High-selectivity wide-stopband balance filter based on slot line
  • High-selectivity wide-stopband balance filter based on slot line

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0029] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and 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.

[0030] The invention provides a balanced filter with high selectivity and wide stop band, which simultaneously realizes high selectivity of the pass band and wide suppression range of stop band outside the pass band, and the filter has low insertion loss and compact circuit size.

[0031] figure 1It is a structural block diagram of the high selectivity wide stopband balanced filter proposed by the present invention. Among them, the π-shaped slot line network (stop band suppression module) is used to realize wide stop band, and the split ring resonator (pass band selection module) is used to realiz...

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 belongs to the technical field of balance filters, and discloses a high-selectivity wide-stopband balance filter based on a slot line. The high-selectivity wide-stopband balance filter comprises a microstrip, a dielectric substrate and a conductive layer which are arranged successively. A slot line is etched on the conductive layer to form a passband selection module and a stopband suppression module. The passband selection module comprises two open ring resonators symmetrically arranged in a horizontal direction. The coupling end of one open ring resonator serves as the signal feed-in end of the passband selection module. The coupling end of the other open ring resonator serves as the signal feed-out end of the passband selection module. The stopband suppression module comprises two slot line [pi]-type networks symmetrically arranged in the vertical direction, wherein one slot line [pi]-type network is connected to the signal feed-in end of the passband selection module,and the other slot line [pi]-type network is connected to the signal feed-out end of the passband selection module. The high-selectivity wide-stopband balance filter achieves a wide stopband and highpassband selectivity by using a second-order resonant circuit composed of the slot line [pi]-type networks and the two slot line open ring resonators.

Description

technical field [0001] The invention belongs to the technical field of balanced filters, and more specifically relates to a slot-line-based high-selectivity wide-stop band balanced filter. Background technique [0002] With the rapid development of radio frequency communication systems, people have higher and higher requirements for the anti-interference ability and noise suppression level of the circuit. As the main effective means to solve this problem, the balanced circuit has received more attention and research. Among them, the balanced filter is the most basic device in the balanced circuit. A competitive balanced filter should be able to efficiently pass the desired differential-mode signals while effectively rejecting common-mode signals in the passband. A new type of balanced filter with high selectivity and wide stopband characteristics can better meet the needs of communication systems, and it is also a research trend. [0003] In order to obtain high selectivi...

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
Patent Type & Authority Applications(China)
IPC IPC(8): H01P1/212
CPCH01P1/212
Inventor 毕晓君曾星
Owner HUAZHONG UNIV OF SCI & TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Eureka Blog
Learn More
PatSnap group products