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Fractal defected structured quarter-mode substrate integrated waveguide bandpass filter

A band-pass filter and integrated waveguide technology, which is applied to waveguide-type devices, electrical components, circuits, etc., can solve the problems of complex processing process, high cost, and large size of the substrate integrated waveguide filter, so as to improve the frequency selectivity. , the effect of reducing the size and extending the equivalent current length

Inactive Publication Date: 2016-04-13
CHINA UNIV OF MINING & TECH
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  • Abstract
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AI Technical Summary

Problems solved by technology

However, compared with the microstrip filter, the size of the substrate integrated waveguide filter is still large
Although advanced multi-layer technology can reduce the overall size, but the cost is high and the processing process is complicated

Method used

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  • Fractal defected structured quarter-mode substrate integrated waveguide bandpass filter
  • Fractal defected structured quarter-mode substrate integrated waveguide bandpass filter
  • Fractal defected structured quarter-mode substrate integrated waveguide bandpass filter

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Embodiment Construction

[0012] A quarter-mode substrate integrated waveguide bandpass filter with a fractal defect structure, the filter includes: a dielectric substrate 4, metal patches 1, 5 and metal through holes 3 arranged on the upper and lower surfaces of the dielectric substrate, the The metal through hole 3 runs through the dielectric substrate 4 and the metal patches 1 and 5 on the upper and lower surfaces. Such as Figure 1a Shown is a single quarter-mode substrate-integrated waveguide resonator, whose two open boundaries are equivalent to ideal magnetic walls. Side a determines that three isosceles right-angled triangles 2 of the same size are etched on the upper metal surface of the quarter-mode substrate integrated waveguide resonator cavity and are connected by sharing vertices.

[0013] Such as figure 2 The present invention shown is a cross-coupled filter composed of three quarter-mode substrate integrated waveguide resonators with fractal defect structure. The filter includes: inpu...

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Abstract

The invention relates to a fractal defected structured quarter-mode substrate integrated waveguide bandpass filter which comprises the components of a dielectric substrate, metal patches which are arranged on the upper surface and the lower surface of the dielectric substrate, and metal through holes in the dielectric substrate. Each metal patch comprises an input-output port microstrip line, a first resonant chamber with a fractal defected structured quarter-mode substrate integrated waveguide, a second resonant chamber and a third resonant chamber. The first resonant chamber and the third resonant chamber are in mirror symmetry relative to the central axis of the second resonant chamber. A first electric coupling is arranged between the first resonant chamber and the second resonant chamber. A second electric coupling is arranged between the second resonant chamber and the third resonant chamber. Magnetic coupling between the first resonant chamber and the third resonant chamber is realized through an inductive window. The fractal defected structured quarter-mode substrate integrated waveguide bandpass filter has beneficial effects of compact structure, small dimension, high upper stopband selectivity, high performance stability and easy system integration.

Description

technical field [0001] The invention relates to the field of microwave and millimeter wave filters, in particular to a substrate integrated waveguide filter. Background technique [0002] Substrate-integrated waveguide filters have attracted much attention in recent years. Substrate-integrated waveguides are transformed from traditional metal waveguides. Two rows of metal through-holes are opened on ordinary substrates to replace the narrow sides of rectangular waveguides. Substrate-integrated waveguide filters While retaining the characteristics of high Q value and good selectivity of the metal waveguide structure filter, it also has the characteristics of small size, light weight, low cost, and easy processing of the microstrip structure filter. In addition, it can also be used with Microstrip circuits realize seamless integration, and are suitable for mass production in the design of microwave and millimeter wave circuits. However, compared with the microstrip filter, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01P1/20H01P1/203
CPCH01P1/20H01P1/203
Inventor 张胜汪海婷饶家宇付学东
Owner CHINA UNIV OF MINING & TECH
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