High common-mode rejection transmission line based on double-layer half-mode comb-shaped substrate integrated waveguide

A substrate-integrated waveguide, high common-mode suppression technology, applied in waveguides, waveguide-type devices, circuits, etc., can solve the problems of high radiation loss, limited application scope, etc., to broaden the application scope, be conducive to miniaturization, high common The effect of mode signal suppression

Inactive Publication Date: 2021-02-12
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

However, due to the inherent shortcomings of microstrip lines, the radiation loss is relatively high at higher frequencies, which limits its application range.

Method used

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  • High common-mode rejection transmission line based on double-layer half-mode comb-shaped substrate integrated waveguide
  • High common-mode rejection transmission line based on double-layer half-mode comb-shaped substrate integrated waveguide
  • High common-mode rejection transmission line based on double-layer half-mode comb-shaped substrate integrated waveguide

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Embodiment Construction

[0037] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific preferred embodiments.

[0038] In the description of the present invention, it should be understood that the orientations or positional relationships indicated by the terms "left side", "right side", "upper", "lower" are based on the orientations or positional relationships shown in the accompanying drawings, and are only For the purpose of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, "first", "second" and the like do not represent components importance, and therefore should not be construed as limiting the 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 in...

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Abstract

The invention discloses a high common-mode rejection transmission line based on a double-layer half-mode comb-shaped substrate integrated waveguide. The high common-mode rejection transmission line comprises an upper dielectric substrate, a lower dielectric substrate, a middle metal layer, an upper HMCSIW transmission line, a lower HMCSIW transmission line, a rectangular metal gap and an artificial surface plasmon structure. The rectangular metal gap is etched in the middle metal layer, and an artificial surface plasmon structure of a plurality of fishhook-shaped metal strips which are distributed at equal intervals is arranged in the rectangular metal gap; wherein the upper HMCSIW transmission line and the lower HMCSIW transmission line are vertically overlapped and respectively comprisea rectangular metal sheet, two feed microstrip lines and a plurality of open circuit branches; the open circuit direction of each open circuit branch knot is opposite to the opening direction of the fishhook of the metal strip. The open-circuit branch knot can form an artificial surface plasmon, and when the input frequency is the cut-off frequency of the artificial surface plasmon structure, zerotransmission can be formed. The rectangular metal slot and the artificial surface plasmon structure can suppress a slot transmission mode, improve the high common mode rejection performance of the transmission line, and meet the actual requirements of a differential system.

Description

technical field [0001] The invention relates to the technical field of microwave transmission lines, in particular to a high common-mode suppression transmission line based on a double-layer half-mode comb-shaped substrate integrated waveguide. Background technique [0002] Ideal for microwave and millimeter-wave circuits, substrate-integrated waveguides (SIWs) are a technology that can integrate passive waveguide components into planar circuits with high quality, ease of fabrication, and low cost. However, the upper and lower copper surfaces of the substrate-integrated waveguide are connected by metal through holes, so it will cause a short circuit when the active device is integrated, and the processing of the metal through holes is also very inconvenient and has a large error. In order to solve the above two problems, a new type of transmission line called Comb Substrate Integrated Waveguide (CSIW) appears, which replaces metal vias with quarter-wavelength open stubs on b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01P3/08
CPCH01P3/082
Inventor 朱家明杨新禹孙楠邓宏伟
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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