Unlock instant, AI-driven research and patent intelligence for your innovation.

A Balanced Dual-Passband Microstrip Filter

A technology of microstrip filter and double-pass band, which is applied in the direction of waveguide devices, circuits, electrical components, etc., can solve the problems of size and frequency selective structure, and achieve high out-of-band suppression, simple structure, and high frequency selective effect

Active Publication Date: 2020-12-01
NANTONG UNIVERSITY +1
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main design method is to use step impedance resonators, stub loaded resonators, stub loaded step impedance resonators, lumped element loaded step impedance resonators, terminal short / open coupled step impedance resonators, asymmetrically coupled lines, Multi-mode ring resonators, etc. achieve balanced dual-passband filtering and common-mode rejection, but the above design cannot take into account size, frequency selectivity and simple structure

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 Balanced Dual-Passband Microstrip Filter
  • A Balanced Dual-Passband Microstrip Filter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0015] The present invention will be further explained below in conjunction with the accompanying drawings.

[0016] Such as figure 1 As shown, a balanced double-passband microstrip filter adopts a single-layer microstrip and a center-symmetrical structure, including four feeders 1 to 4, two coupled microstrip lines 5 and 6 of one-tenth wavelength, and four Coupled microstrip lines 7 to 10 with one-fifth wavelength, two chip capacitors C 1 , four ground chip capacitors C 2 and two ground chip capacitors C 3 .

[0017] Four one-fifth wavelength coupled microstrip lines 7 to 10 are cascaded in pairs, and two one-tenth wavelength coupled microstrip lines 5 and 6 are respectively connected to two groups of one-tenth wavelengths cascaded in pairs. The two ends of the coupled microstrip line. The four feeders 1-4 are respectively connected to two coupling microstrip lines 5, 6 of one-tenth wavelength, and are arranged at the outer center of the coupling microstrip lines 5, 6 of...

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 balanced dual-passband microstrip filter. Each two of four one-fifth wavelength coupled microstrip lines is cascaded. Two one-tenth wavelength coupled microstrip lines are connected to two ends of two groups of pairwise-cascaded one-tenth wavelength coupled microstrip lines. By adopting a mode in which the two one-tenth wavelength coupled microstrip lines are cascaded tothe four one-fifth wavelength coupled microstrip lines and chip capacitors are combined and loaded, a balanced dual-passband microstrip filter with a small size, high frequency selectivity, a simple structure and multiple transmission zero points can be acquired.

Description

technical field [0001] The invention relates to the field of microwave communication, in particular to a balanced double-passband filter. Background technique [0002] With the rapid development of wireless communication technology, wireless communication systems of different standards are emerging, such as GSM, WCDMA, FDD-LTE, TD-LTE, etc., so there is a great demand for communication systems that can work in multiple frequency bands. Among them, the dual-passband system is more widely used, and the dual-passband filter is an important part of it. At the same time, the development trend of wireless system integration and high performance has increased the suppression requirements for environmental noise and electromagnetic interference, and balanced circuits have the ability to resist electromagnetic interference and suppress environmental noise, so they are widely used in such systems . The balanced dual-passband filter can obtain the dual-passband filtering function and...

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
CPCH01P1/203
Inventor 施金董建成徐凯张威曹青华杨永杰
Owner NANTONG UNIVERSITY