Three-notch band pass filter based on stepped-impedance resonator and open circuit branches

A band-pass filter and stepped impedance technology, applied in circuits, waveguide devices, electrical components, etc., can solve the problems of large size, non-adjustable notch, etc., and achieve simple design, adjustable band-pass characteristics, and convenient processing. Effect

Inactive Publication Date: 2017-06-20
HARBIN FEIYU TECH
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In recent years, some design ideas have emerged, such as multi-mode resonators (MMR), via structures, etc. Although these structures can achieve the effect of notch waves, these structures are large in size and the notch waves cannot be adjusted.

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
  • Three-notch band pass filter based on stepped-impedance resonator and open circuit branches
  • Three-notch band pass filter based on stepped-impedance resonator and open circuit branches
  • Three-notch band pass filter based on stepped-impedance resonator and open circuit branches

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0018] The invention designs a three-notch band-pass filter based on a ladder impedance resonator and an open branch, and the filter has adjustable notch waves and adjustable pass bands.

[0019] Below in conjunction with accompanying drawing this invention is described in more detail:

[0020] Such as figure 1 As shown, the triple-notch bandpass filter based on the stepped impedance resonator and the open stub designed by the present invention, the λ / 4 short-circuit stub resonator (101) of 4 folded structures, the stepped impedance resonator (102), two The input and output ports (103), double open-circuit stubs (104), and the half-wavelength microstrip line (105) are made of copper material.

[0021] An example of the present invention is figure 2 As shown, the dielectric substrate (106) is RT / Duorid5880 with a dielectric constant of 2.2, the thickness of the dielectric substrate is 1.0 mm, and the metal ground plate (107) under the dielectric substrate is made of copper m...

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 present invention discloses a three-notch band pass filter based on a stepped-impedance resonator and open circuit branches. The filter comprises four lambda / 4 short circuit branch resonators (101) of the folded structures, the stepped-impedance resonator (102), two input / output ports (103), double open circuit branches (104), a half-wavelength microstrip line (105), a dielectric substrate (106) and a metal grounding plate (107) under the dielectric substrate. According to the present invention, the band pass filter having the three-notch characteristics is realized by utilizing the stepped-impedance resonator and the open circuit branches, is simple in design, compact in structure and low in cost, and is convenient to process.

Description

technical field [0001] The invention proposes a three-notch bandpass filter based on a ladder impedance resonator and an open-circuit stub, and the filter is an ultra-wideband filter with three notches. Four folded λ / 4 short-circuit stubs realize the ultra-broadband characteristics of the filter, and on this basis, a ladder impedance resonator and an open-circuit stub are loaded to realize a triple-notch bandpass filter. Background technique [0002] In February 2002, the U.S. Federal Communications Commission (FCC) approved the 3.1-10.6GHz frequency band for commercial communications, so UWB is widely used. However, within the commercial range defined by FCC, UWB signals may be interfered by signals such as WiAX (3.5-GHz), WLAN (5.15-5.825GHz), RFID (6.8GHz), etc. How to solve co-channel interference has become an important content of ultra-wideband research. As one of the indispensable key components in multi-frequency communication systems, multi-band filters, ultra-wide...

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
CPCH01P1/203
Inventor 郑学梅耿一方王燕燕
Owner HARBIN FEIYU 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
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap