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

Four-ordered cross-coupled bandpass filter

A band-pass filter and cross-coupling technology, which is applied in the field of substrate integrated waveguide filters, can solve the problems of increased circuit area and unfavorable miniaturization, and achieve the effects of reduced circuit area, high space utilization, and easy processing

Inactive Publication Date: 2013-01-23
SHANGHAI SPACEFLIGHT INST OF TT&C & TELECOMM
View PDF0 Cites 17 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it should be pointed out that the additional cross-coupled transmission line converter will increase the original circuit area, which is not conducive to miniaturization

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-ordered cross-coupled bandpass filter
  • Four-ordered cross-coupled bandpass filter
  • Four-ordered cross-coupled bandpass filter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0019] Embodiments of the present invention are described in detail below, and the present embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation and specific operation process are provided, but the protection scope of the present invention is not limited to the following embodiments.

[0020] Such as figure 1 As shown, the filter in the embodiment of the present invention includes: an input port I / P, an output port O / P, two microstrip resonators and two center-symmetrical first and fourth resonators 1, 4, two The microstrip resonators are the second microstrip resonator 2 and the third microstrip resonator 3, the first resonator 1 and the fourth resonator 4 are both SIW cavity resonators, and their length and width are respectively L 23 , L 33 , there is a window on the common side of the two cavities, the width is D 3 , used to control the strength of the cross-coupling. The resonant frequency of the second...

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 relates to a four-ordered cross-coupled bandpass filter, and in particular discloses a novel four-ordered cross-coupled substrate integrated waveguide bandpass filter. The bandpass filter comprises a dielectric substrate, metal patches, metal through holes and slots, wherein the metal patches are arranged on the surface and bottom surface of the dielectric substrate; the metal patch on the bottom surface is a ground layer; two rectangular cavities formed by metal through holes are formed in the middle part of the surface metal patch; a window is formed between the two rectangular cavities and used for cross coupling; a microstrip resonator which is directly connected with the corresponding rectangular cavity is arranged on the surface metal patch, and a micro resonator which is directly connected with the corresponding rectangular cavity is arranged on the lower part of the surface metal patch; the two sides of each rectangular cavity are connected with input and output microstrip lines; and slots are engraved at positions where the cavities and the input and output microstrip lines are connected. The novel four-ordered cross-coupled bandpass filter has a compact structure, relatively good frequency selectivity and relatively high Q value.

Description

technical field [0001] The invention relates to a substrate integrated waveguide filter, in particular to a fourth-order cross-coupling band-pass filter with compact structure and quasi-elliptic function performance. Background technique [0002] Band-pass filters with compact structure, good frequency selectivity and low loss are often used to suppress signals outside the useful frequency band. As one of the most important front-end devices in wireless communication systems, they are increasingly popular With the attention of researchers, the demand for such high-performance filters has become very urgent. [0003] Cross-coupling between non-adjacent resonators is often used to generate transmission zeros at limited frequency points to achieve a steep transition between the passband and stopband, thereby obtaining higher frequency selectivity. Substrate integrated waveguide technology is widely favored in the development of microwave and millimeter wave devices because of ...

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 沈玮
Owner SHANGHAI SPACEFLIGHT INST OF TT&C & TELECOMM
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