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

LTCC balanced band-pass filter based on multi-frequency coupling

A band-pass filter and balanced technology, applied in the field of balanced band-pass filters based on LTCC technology, can solve problems affecting the original performance of lumped components and the parameters of lumped components cannot be accurately controlled, and achieve out-of-band The effects of good rejection, compact filter structure, and high common-mode rejection ratio

Active Publication Date: 2017-02-08
SOUTH CHINA UNIV OF TECH
View PDF7 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But as the frequency increases, parasitic effects and unwanted coupling may affect the original performance of the lumped element, so the parameters of the lumped element cannot be accurately controlled, and the distributed resonator will not have the same question

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
  • LTCC balanced band-pass filter based on multi-frequency coupling
  • LTCC balanced band-pass filter based on multi-frequency coupling
  • LTCC balanced band-pass filter based on multi-frequency coupling

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0029] The technical solutions adopted in the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. The drawings in the following description are only some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to these drawings without creative work.

[0030] Such as figure 1 As shown, the embodiment of the present invention provides a LTCC balanced filter based on multi-coupling common-mode signal suppression. The entire filter is an LTCC multilayer structure consisting of seven dielectric substrates, eight conductor layers and six metal Composed of through holes; two half-wavelength short-circuit line resonators are respectively connected by microstrip lines located in four different conductor layers through metal through holes, and are distributed in a front-to-back and left-right symmetrical structure; each layer of dielectric substrate consists of a lower ...

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 an LTCC balanced band-pass filter based on multi-frequency coupling, comprising two half-wavelength resonators and two groups of feeders. The two half-wavelength resonators are each composed of micro-strip lines in three different conductor layers, and the micro-strip lines in different conductor layers are connected by metal through holes. First coupling regions (211) of the two half-wavelength resonators are coupled to each other in the form of parallel coupling. The two groups of feeders (501, 502, 503) are disposed in the same conductor layer, and feed second coupling regions (411) of the two half-wavelength resonators under the feeders in the form of vertical coupling. The size of the filter is reduced effectively. The filter has high common-mode rejection ratio. Source-load coupling is introduced between the feeders, three transmission zeros are produced, and the selectivity of pass band is improved.

Description

technical field [0001] The invention relates to a balanced band-pass filter, in particular to a balanced band-pass filter based on LTCC technology which can be applied to radio frequency front-end circuits by using a feed structure to suppress common-mode signals. Background technique [0002] With the rapid development of modern wireless communication systems, there is an increasing demand for balanced circuits, and balanced filters are one of the important passive components, which usually occupy a large area for traditional printed circuits. Therefore, the miniaturization of the filter is very important. [0003] Existing planar balanced filters have been studied a lot and have good performance, but their size is very large, which makes it difficult for practical applications. Therefore, low-temperature co-fired ceramic (LTCC) technology can significantly reduce the size of the circuit and has the advantages of low cost, good high-frequency performance, and low insertion...

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): H01P1/203H01P7/08
CPCH01P1/203H01P7/08
Inventor 李园春陈钦创
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