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DGW structure-based micro-strip S-waveband band pass filter

A band-pass filter, filter technology, applied in waveguide-type devices, resonators, electrical components, etc., can solve problems such as increasing the difficulty of circuit design, reduce complexity and repeatability, achieve dual-mode effect, and is conducive to The effect of miniaturization

Inactive Publication Date: 2011-01-12
EAST CHINA JIAOTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The introduction of cross-coupling has a relatively large impact on the in-band and out-of-band characteristics of the filter, so it is necessary to recalculate the coupling between resonators, which increases the difficulty of circuit design

Method used

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  • DGW structure-based micro-strip S-waveband band pass filter
  • DGW structure-based micro-strip S-waveband band pass filter
  • DGW structure-based micro-strip S-waveband band pass filter

Examples

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Embodiment Construction

[0017] Examples of the invention figure 1 As shown, the microstrip S-band bandpass filter in this embodiment is composed of an SIR resonator 3 with a DGW structure and an input / output feeder 1 located on a substrate; 2 is a ground plane, and 4 is a dielectric layer.

[0018] The dielectric material used in the filter in this embodiment has a dielectric constant of 4.5 and a plate thickness of 0.8 mm.

[0019] The DGW resonant unit in this embodiment is corroded on the grounding surface, and the feeder is on the corresponding metal copper plate surface. By making the circuit diagram with the PROTOL printed circuit tool, a dual-mode S-band filter with good characteristics can be made. The shape and design dimensions of the DGW resonant unit in this embodiment are as follows Figure 5 As shown, the relevant dimensions of each part are: L4=8.8mm; L5=1.8mm; L6=1mm; L7=5.05mm; L8=1.4mm; L9=0.9mm.

[0020] The feeder in this embodiment is an "L" feeder, and its structural design dimensions...

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Abstract

The invention discloses a DGW structure-based micro-strip S-waveband band pass filter, which consists of a stepped impedance resonator (SIR) 3 with a DGW structure and input / output L-shaped feeder lines 1, wherein the stepped impedance resonator with the DGW structure is positioned on a grounding plate 2 below a medium layer; and the input / output L-shaped feeder lines are positioned on a medium substrate. The SIR with the DGW structure presents remarkable slow-wave effect due to characteristics thereof, and can reduce band pass central frequency with the same size to realize the miniaturization of the filter; the filter has a dual-mode characteristic so as to effectively achieve required bandwidth and crony characteristics under the condition of the same stage number; at the premise of not increasing the area of a circuit and machining complexity, the structure of a filter body is realized by the DGW structure, so that the size of the resonator with the same resonance frequency is reduced and the volume of the whole circuit is further reduced; and the filter is applied to microwave integrated circuits.

Description

Technical field [0001] The invention relates to a microstrip S-band bandpass filter based on a DGW structure, belonging to the technical field of microwave filter devices. Background technique [0002] Microstrip filter is a kind of filter based on the electromagnetic field theory and realized by the inductive, capacitive and mutual coupling of the microstrip line itself. Because of its small size, high reliability, good production consistency, no debugging, and easy integration And other advantages, widely used in microwave hybrid circuits. Reducing the size of the circuit and improving the performance of the circuit are important issues in the design of modern microwave filters. Generally, there are many structures of microstrip resonators, which can be roughly divided into three categories: open-loop, closed-loop and chip-type in a general sense. [0003] The DGW structure is a technology for designing the layout on the grounding plate. Through the layout on the floor, the ele...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01P1/203H01P7/08
Inventor 王杉姜杨
Owner EAST CHINA JIAOTONG UNIVERSITY
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