Fin line type orthogonal-mode coupler based on double-ridge step structure

A technology of orthogonal mode coupler and steps, which is applied in the direction of waveguide devices, electrical components, connecting devices, etc., can solve the problem that the in-band return loss characteristics of fin-line OMTs can not be fully considered relative to the working bandwidth, and achieve reduction Effects of device insertion loss, overall compactness, and wide bandwidth

Active Publication Date: 2018-02-27
XIDIAN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] As far as the existing technology is concerned, the fin-line OMT still cannot fully take into account the three aspects of device size, in-band return loss characteristics and relative operating bandwidth.

Method used

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  • Fin line type orthogonal-mode coupler based on double-ridge step structure
  • Fin line type orthogonal-mode coupler based on double-ridge step structure
  • Fin line type orthogonal-mode coupler based on double-ridge step structure

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Experimental program
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Effect test

Embodiment 1

[0033] refer to figure 1 , a fin linear orthogonal mode coupler based on a double ridge step structure, including a waveguide body, the waveguide body adopts a three-port T-shaped waveguide structure composed of a horizontal waveguide 1 and a vertical waveguide 2 perpendicular to each other, wherein the horizontal waveguide 1 Sectional diagram of xoy plane figure 2 As shown in (a), the cross-sectional view of the xoz plane of the horizontal waveguide 1 is as follows figure 2 As shown in (b), the structural schematic diagram of the vertical waveguide 2 is as follows image 3 As shown, the T-shaped waveguide structure is symmetrical about the yoz plane, and a metal ridge 3 and an impedance absorbing piece 4 with a thickness of 0.4mm are installed next to the yoz symmetry plane of the waveguide structure, and the metal ridge 3 It consists of two parts, the horizontal metal ridge 31 and the vertical metal ridge 32, wherein the yoz section diagram of the horizontal metal ridge ...

Embodiment 2

[0040] Embodiment 2, the structure of this embodiment is the same as that of Embodiment 1, only for the resistance value R per square centimeter of the impedance absorbing sheet and the number of stepped gaps N on the horizontal metal ridge sheet 31 1 And each step parameter and the step-like gap series number N on the vertical metal ridge sheet 32 2 And the parameters of each step are adjusted:

[0041] Impedance absorbing sheet 4 adopts the ITO conductive glass material whose impedance value per square centimeter is R=50Ω; in the horizontal metal ridge sheet 31, the number of steps on the gap is 3, and each step is mirror-symmetrical about the longitudinal central axis of the metal patch, and the steps The length and spacing along the negative direction of the y-axis are 2.56mm×4.5mm, 2.26mm×2mm, 2.02mm×0.5mm respectively; in the vertical metal ridge 32, the number of steps on the gap is 2, and each step is about The longitudinal central axis of the sheet is mirror-symmetri...

Embodiment 3

[0042] Embodiment 3, the structure of this embodiment is the same as that of Embodiment 1, only for the resistance value R per square centimeter of the impedance absorbing sheet and the number of stepped gaps N on the horizontal metal ridge sheet 31 1 And each step parameter and the step-like gap series number N on the vertical metal ridge sheet 32 2 And the parameters of each step are adjusted:

[0043] Impedance absorbing sheet 4 adopts the ITO conductive glass material whose impedance value per square centimeter is R=500Ω; in the horizontal metal ridge sheet 31, the number of steps on the gap is 9, and each step is mirror-symmetrical about the longitudinal central axis of the metal patch, and the steps The length and spacing along the negative direction of the y-axis are 2.56mm×5mm, 2.26mm×4.2mm, 2.02mm×3.5mm, 2.02mm×2.75mm, 2.02mm×2.1mm, 2.02mm×1.5mm, 2.02mm× 1mm, 2.02mm×0.6mm, 2.02mm×0.25mm; in the vertical metal ridge 32, the number of steps on the gap is 8, each step i...

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Abstract

The invention discloses a fin line type orthogonal-mode coupler based on a double-ridge step structure and aims at decreasing the size of a device of the coupler and improving the return loss characteristics in its working bandwidth while ensuring the relative working bandwidth of the fin line type orthogonal-mode coupler. The whole structure comprises a three-port T-shaped waveguide structure composed of a horizontal waveguide and a vertical waveguide, a metal ridge piece and an impedance absorbing piece, wherein the metal ridge pieces and the impedance absorbing pieces are located in a T-shaped cavity of the waveguide structure and are fixed side by side, the horizontal waveguide is formed by sequentially cascading a horizontal square waveguide section, a horizontal stepped waveguide section and a horizontal rectangular waveguide section, the vertical waveguide is formed by sequentially cascading a vertical stepped waveguide section and a vertical rectangular waveguide section, the metal ridge piece consists of a horizontal metal ridge piece and a vertical metal ridge piece, the metal ridge pieces are provided with communicated stepped gaps for coupling vertical polarized electromagnetic waves in the horizontal square waveguide section into the vertical waveguide, and miniaturization is achieved.

Description

technical field [0001] The invention belongs to the technical field of couplers in antenna feeding structures, and relates to a linear fin-type orthogonal mode coupler, in particular to a linear fin-type orthogonal mode coupler based on a double-ridge step structure, which can be used for communication and remote sensing wideband receiver systems required in fields such as radio astronomy and radio astronomy. Background technique [0002] In a microwave system, it is often necessary to divide one microwave power into several circuits in proportion, and the components that realize this function are called couplers. Ortho-Mode Transducer (OMT, Ortho-Mode Transducer) is widely used in dual-polarized antenna feed network. The formation of antenna dual polarization depends on the Ortho-Mode Coupler, and its performance directly affects the communication of the entire system. quality. OMT is generally shown as only three physical ports, and is electrically a four-port device, in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01P5/16
CPCH01P5/16
Inventor 俞亚庆姜文龚书喜杨瀚韬王晓骁
Owner XIDIAN UNIV
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