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Microwave three-frequency band-pass filter based on wedged SIR (Signal to Interference Ratio) structure

A microstrip filter and filter technology, which is applied to waveguide-type devices, resonators, electrical components, etc., can solve problems such as no wedge-shaped SIR structure, and achieve the effects of flexible design, optimized performance and high utilization effect.

Inactive Publication Date: 2011-01-26
EAST CHINA JIAOTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, in the existing literature, there is no wedge-shaped SIR structure, and there is no example of the application of the wedge-shaped SIR structure

Method used

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  • Microwave three-frequency band-pass filter based on wedged SIR (Signal to Interference Ratio) structure
  • Microwave three-frequency band-pass filter based on wedged SIR (Signal to Interference Ratio) structure
  • Microwave three-frequency band-pass filter based on wedged SIR (Signal to Interference Ratio) structure

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Embodiment Construction

[0021] Examples of the invention figure 1 , figure 2 , image 3 , Figure 4 with Figure 5 Shown.

[0022] figure 1 It is a wedge-shaped SIR structure diagram in an embodiment of the present invention; figure 2 It is a structural diagram of an interdigital dual-pass band-pass filter designed by applying resonant SIR in an embodiment of the present invention; image 3 This embodiment is a diagram of the overall size of the upper layer of the triple band pass filter based on the wedge-shaped SIR structure; Figure 4 Is the overall size diagram of the DGS layer in the embodiment of the present invention; Figure 5 This embodiment is a simulation diagram of a microwave three-band pass filter based on a wedge-shaped SIR structure.

[0023] The microwave tri-band pass filter based on the wedge-shaped SIR structure in this embodiment is constructed on a dielectric plate with a size of 2 mm×20 mm, a thickness of 0.8 mm, and a dielectric constant of 4.5.

[0024] The wedge-shaped SIR has a...

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Abstract

The invention discloses a three-passband micro-band filter with low loss, based on a wedged SIR (Signal to Interference Ratio) structure. The three-passband micro-band filter adopts a coupling feedback structure on a micro-band transmission line with matched 50ohm resistance, and a rectangular defective geo-structure (DGS) is additionally arranged under the lower side of the three-passband micro-band filter; and a resonator adopts an interdigital wedged SIR (Signal to Interference Ratio) structure. The wedged SIR structure adopts a transition line for improving the resistance mutation of the SIR to achieve the smooth effect, and can be equivalent to a limiting form of a multi-order SIR at the same time, and the coupling effect is stronger. The rectangular defective geo-structure (DGS) additionally arranged under 50ohm of a coupling feeder line is equivalent to that one low-pass filter is cascaded at the front end of a post-stage band-pass filter, thereby the performance of the filter under the condition of not increasing the volume of the filter is further optimized. The invention discloses the three-passband micro-band filter with the low loss on the basis of the wedged SIR structure, the structure of the which is smaller than that of a single filter, and the three-passband micro-band filter can better meet the requirement on modern communication of miniaturized three-passband.

Description

Technical field [0001] The invention relates to a microwave three-band pass filter with a wedge-shaped SIR structure, belonging to the technical field of microwave transmission devices. Background technique [0002] As one of the indispensable key components in modern communication equipment, the filter can effectively filter out all kinds of useless signals and noise signals, reduce the signal interference between communication channels, so as to ensure the normal operation of communication equipment and achieve high-quality Communication, and then achieve effective use of spectrum resources. Microstrip filters are widely used in circuits such as microwave integrated circuits (MIC) due to their small size, relatively low processing complexity, light weight and easy integration. [0003] In order to make full use of the existing spectrum and basic equipment resources, one of the effective ways to set up multiple communication frequency bands that can work at the same time in the c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01P1/203H01P7/08
Inventor 朱路刘海文邱元腾官雪辉黄德昌
Owner EAST CHINA JIAOTONG UNIVERSITY
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