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

A compact bandpass filter with transmission zeros at both high and low frequencies

A technology of band-pass filter and transmission zero point, which is applied in the field of millimeter waves, can solve the problems of inaccurate processing and achieve the effects of simple and compact structure, increased in-band width, and wide passband bandwidth

Active Publication Date: 2018-09-25
NANJING UNIV OF POSTS & TELECOMM
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the design size of millimeter wave devices is reduced to a certain extent, due to the limitations of industrial processing technology, it will not be able to be precisely processed

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 compact bandpass filter with transmission zeros at both high and low frequencies
  • A compact bandpass filter with transmission zeros at both high and low frequencies
  • A compact bandpass filter with transmission zeros at both high and low frequencies

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0025] The technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0026] Such as figure 1 As shown, a compact bandpass filter with transmission zeros at both high frequency and low frequency, including the first to sixth resonant cavities and the first to third microstrip lines. Such as figure 2 As shown, the first to sixth resonators all include a top metal layer 1, a dielectric substrate 2 and a bottom metal layer 4 in parallel from top to bottom, and the top metal layer, dielectric substrate and bottom metal layer of each resonator The metal layers are isosceles triangles that are congruent to each other and have an obtuse angle of 120°. Metallized rectangular groove lines 3 parallel to the dielectric substrate are arranged on the dielectric substrate of each resonator.

[0027] The area of ​​the triangle surrounded by the three rows of metallized rectangular groove lines on the dielectric substrate...

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 compact-type band-pass filter comprising transmission zero points at high and low frequencies, and the filter comprises a first resonant cavity, a second resonant cavity, a third resonant cavity, a fourth resonant cavity, a fifth resonant cavity, a sixth resonant cavity, a first microstrip line, a second microstrip line, and a third microstrip line. The first, second and third resonant cavities are coupled to form an equilateral triangle resonant cavity comprising a zero point at the high frequency. The fourth, fifth and sixth resonant cavities are coupled to form an equilateral triangle resonant cavity comprising a zero point at the low frequency. The two equilateral triangle resonant cavities are in cascading connection through the microstrip lines, thereby forming the filter comprising six resonant cavities. The filter is larger in bandwidth, comprises the transmission zero points at high and low frequencies, and can effectively inhibit out-band harmonics. Compared with other types of substrate-integrated waveguide resonant cavity filters, the filter is more compact in structure.

Description

technical field [0001] The invention belongs to the technical field of millimeter waves, and in particular relates to a compact band-pass filter with transmission zero points at both high frequency and low frequency. Background technique [0002] With the rapid development of the wireless communication industry, communication equipment is constantly developing towards miniaturization, low cost, low loss, and more portable. Substrate Integrated Waveguide (SIW: Substrate Integrated Waveguide) has been a research hotspot in recent years. Because of its high quality factor, high power capacity, small size, and easy processing, it has a very wide range of applications in microwave and millimeter wave circuits. In the past few decades, a large number of literatures have conducted in-depth research on rectangular and circular substrate-integrated waveguides, but little research has been done on triangular substrate-integrated waveguides. Compared with them, triangular substrate-i...

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): H01P1/208
CPCH01P1/208
Inventor 许锋裘姝洁
Owner NANJING UNIV OF POSTS & TELECOMM
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com