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Balanced dual-mode bandpass filter based on double-layer substrate integrated waveguide

A substrate-integrated waveguide and filter technology, applied to waveguide devices, circuits, electrical components, etc., can solve the problems of low power handling capacity, low quality factor, high radiation loss, etc., to achieve broadband common mode suppression, reduce Effect of Facet Size

Active Publication Date: 2021-03-16
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, when the operating frequency enters the microwave high frequency band or the millimeter wave band, the above-mentioned balanced filter has high radiation loss, low power handling capability, quality factor Q e Inferior disadvantages, so can not continue to be used

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  • Balanced dual-mode bandpass filter based on double-layer substrate integrated waveguide
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  • Balanced dual-mode bandpass filter based on double-layer substrate integrated waveguide

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Embodiment Construction

[0032] The present invention will be described in further detail below with reference to the accompanying drawings and specific preferred embodiments.

[0033] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "left side", "right side", "upper", "lower part", etc. are based on the orientation or positional relationship shown in the drawings, only For the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a particular orientation, be constructed and operate in a particular orientation, "first", "second", etc. importance, and therefore should not be construed as a limitation to the present invention. The specific dimensions used in this embodiment are only for illustrating the technical solution, and do not limit the protection scope of the present invention.

[0034] like figure...

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Abstract

The invention discloses a double-layer substrate integrated waveguide-based balanced dual-mode band-pass filter; the balanced dual-mode band-pass filter comprises an upper surface metal layer, a firstdielectric substrate, a middle metal layer, a second dielectric substrate and a lower surface metal layer which are sequentially and coaxially arranged from top to bottom. Two sets of feed ports arearranged in the upper surface metal layer and the lower surface metal layer separately; a plurality of metal through holes and two micro-disturbance metal through holes are formed in the first dielectric substrate and the second dielectric substrate; and a rectangular metal gap is formed in the center of the middle metal layer. According to the filter, the characteristics of the PEC-PMC are utilized, and the rectangular metal gap is etched in the middle metal layer, so that the characteristic of high common mode rejection in a wide frequency band is achieved; and the coupling between the dualmodes in a substrate integrated waveguide rectangular cavity, and a non-resonant node introduced between a source and a load are utilized, so that a controllable transmission zero point and a high-performance balance filter with the high common mode rejection in the wide frequency band are generated on the two sides of a differential mode passband, the selectivity and the common mode rejection performance of the balance filter are effectively improved, and the actual requirements of a differential communication system are met.

Description

technical field [0001] The invention relates to the technical field of balanced filters, in particular to a balanced dual-mode bandpass filter based on a double-layer substrate integrated waveguide. Background technique [0002] With the rapid development of modern communication technology, spectrum resources are increasingly tight. Traditional communication systems are limited by technology and cost, and are widely researched and applied in the frequency spectrum below 6GHz. The microwave high frequency band and the millimeter wave frequency band are more abundant in spectrum resources, which need further research and development. [0003] In communication systems, filter networks are used to transmit and attenuate noise in specific frequency bands, while emerging applications such as wireless communications will place more stringent requirements and challenges on microwave filters—higher performance, smaller size size, lighter weight and lower cost. On the other hand, w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01P1/207H01P1/208
CPCH01P1/207H01P1/208
Inventor 韩杨昆孙亮薛一凡朱家明邓宏伟
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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