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Compact type band-pass filter containing low-frequency transmission zero

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, etc., and achieve the effect of simple and compact structure, easy industrial processing, and wide passband bandwidth

Inactive Publication Date: 2016-06-29
NANJING UNIV OF POSTS & TELECOMM
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  • 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

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  • Compact type band-pass filter containing low-frequency transmission zero
  • Compact type band-pass filter containing low-frequency transmission zero
  • Compact type band-pass filter containing low-frequency transmission zero

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Embodiment Construction

[0022] The technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0023] A compact band-pass filter with low-frequency transmission zero, including a first resonant cavity, a second resonant cavity, a third resonant cavity, a first microstrip line and a second microstrip line. The first, second, and third resonant cavities all include a top metal layer 1, a dielectric substrate 2 and a bottom metal layer 4 parallel to each other from top to bottom, and the top metal layer, the dielectric substrate and the bottom metal layer are mutually congruent and An obtuse isosceles triangle with an obtuse angle of 120°, three rows of metallized through holes 3 parallel to the three edges of the dielectric substrate are arranged on the dielectric substrate. The structures of the first, second and third resonant cavities are as follows: figure 1 shown. The area of ​​the triangle surrounded by the three rows of metall...

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PUM

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Abstract

The invention discloses a compact bandpass filter containing low-frequency transmission zeros, comprising a first resonant cavity, a second resonant cavity, a third resonant cavity, a first microstrip line and a second microstrip line, the first and the second The coupling between the two resonant cavities and the magnetic coupling between the second and third resonant cavities, and the electrical coupling between the first and third resonant cavities, use a pair of mirror-symmetrical S-shaped fine grooves as electrical coupling windows, so that With the same size, the filter has a wider frequency band, thereby reducing the electrical size. Through the negative feedback between the resonant cavities, the filter of a single current channel is expanded into two channels, forming a transmission zero filter, which overcomes the disadvantage of weak out-of-band performance.

Description

technical field [0001] The invention belongs to the technical field of millimeter waves, and in particular relates to a compact band-pass filter containing low-frequency transmission zeros. 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-integrated waveguides are mo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01P1/208
CPCH01P1/208
Inventor 许锋裘姝洁
Owner NANJING UNIV OF POSTS & TELECOMM
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