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

A Planar Bandpass Filter Based on Cascaded Four Resonators

A resonator and filter technology, applied in waveguide-type devices, electrical components, circuits, etc., can solve the problems of large filter volume and unfavorable integration, and achieve the effects of small in-band insertion loss, flexible design, and convenient control.

Inactive Publication Date: 2016-04-13
SOUTH CHINA UNIV OF TECH
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, some structures use too high order to make the filter volume too large, which is not conducive to integration

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
  • A Planar Bandpass Filter Based on Cascaded Four Resonators
  • A Planar Bandpass Filter Based on Cascaded Four Resonators
  • A Planar Bandpass Filter Based on Cascaded Four Resonators

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0033] Such as figure 1 As shown, this embodiment discloses a planar bandpass filter based on cascaded four resonators, wherein the planar bandpass filter of this embodiment is fabricated on a double-sided copper-clad microstrip substrate 1 in the form of a printed circuit board Above, the other side of the microstrip substrate 1 is a copper-clad ground plane, the relative dielectric constant of the microstrip substrate is 2.55, and the dielectric height is 0.80 mm.

[0034] The planar bandpass filter of this embodiment includes the input feeder 2 and the output feeder 3 with the same structure and symmetrical position, the quarter-wavelength first resonator 4 and the fourth resonator 5 with the same structure and symmetrical position, and the same structure and position Symmetrical three-quarter wavelength second resonator 6 and third resonator 7; wherein the first resonator 4, the second resonator 6, the third resonator 7 and the fourth resonator 5 are sequentially cascaded ...

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 plane band-pass filter on the basis of four cascaded resonators. The plane band-pass filter comprises an incoming feeder, an output feeder, the first quarter-wavelength resonator, the fourth quarter-wavelength resonator, the second three-quarter-wavelength resonator and the third three-quarter-wavelength resonator; the first resonator, the second resonator, the third resonator and the fourth resonator are sequentially cascaded to form an annular structure; the first resonator is correspondingly parallel with the incoming feeder to form a first coupled structure, and the fourth resonator is correspondingly parallel with the output feeder to form a fifth coupled structure; the first resonator and the second resonator are connected with a first grounded through hole to form a second coupled structure; one end of the third resonator and one end of the fourth resonator are connected with a second grounded through hole to form a fourth coupled structure; a coupling gap is formed is formed between the second resonator and the third resonator to form a third coupled structure; a coupling gap is formed between the port of the first resonator and the port of the fourth resonator to form a sixth coupled structure. The plane band-pass filter has the advantages of being high in frequency selectivity and small in in-band insertion loss.

Description

technical field [0001] The invention relates to a band-pass filter, in particular to a planar band-pass filter based on cascaded four resonators. Background technique [0002] Radio frequency / microwave filters are an indispensable part of modern microwave relay communication, satellite communication, wireless communication and electronic countermeasure systems, and are also the most important and most technical microwave passive components. As one of the important components in the circuit system, the bandpass filter's performance determines the working quality of the system to a large extent. The bandpass filter mainly works in the RF front end of the communication system, and is used to pass useful signals in a certain frequency range with low loss, while attenuating frequency components in other frequency ranges to an extremely low level. [0003] However, with the rapid development of modern communication requirements, the available spectrum resources are increasingly t...

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 Patents(China)
IPC IPC(8): H01P1/203
Inventor 陈付昌陈健锋涂治红褚庆昕
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