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

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

Inactive Publication Date: 2013-01-09
EAST CHINA JIAOTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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 present invention figure 1 , figure 2 , image 3 , Figure 4 and Figure 5 shown.

[0022] figure 1 It is a wedge-shaped SIR structure diagram in the embodiment of the present invention; figure 2 The structural diagram of the interdigitated double-passband bandpass filter designed for the application of resonant SIR in the embodiment of the present invention; image 3 It is the overall size diagram of the upper layer of the three-band bandpass filter based on the wedge-shaped SIR structure in this embodiment; Figure 4 It is the overall size diagram of the DGS layer in the embodiment of the present invention; Figure 5 It is a simulation diagram of a microwave three-band bandpass filter based on a wedge-shaped SIR structure in this embodiment.

[0023] In this embodiment, the microwave three-band bandpass filter based on the wedge-shaped SIR structure is built on a dielectric plate with a size of 2 mm×20 mm, a thickness of 0.8 mm, and a dielect...

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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 wedge-shaped SIR structure microwave three-band bandpass filter, which belongs to the technical field of microwave transmission devices. Background technique [0002] As one of the indispensable key devices in modern communication equipment, the filter can effectively filter out various useless signals and noise signals, reduce the signal interference between communication channels, thereby ensuring the normal operation of communication equipment and realizing high-quality Communication, and then achieve the effective use of spectrum resources. Due to the advantages of small size, relatively low processing complexity, light weight and easy integration, microstrip filters are widely used in circuits such as microwave integrated circuits (MICs). [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 simu...

Claims

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Application Information

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Patent Type & Authority Patents(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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