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Dual-polarized slotted waveguide antenna based on stepped four-ridge transition

An open-ended waveguide antenna and dual-polarization technology, applied in the directions of antenna coupling, waveguide opening, antenna grounding device, etc., can solve the problems of high maximum standing wave ratio, increased measurement error, poor in-band matching, etc., to ensure input Port isolation, reducing the deterioration of standing wave ratio, and improving the effect of in-band matching characteristics

Active Publication Date: 2019-10-25
XIDIAN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its defect is that the matching of individual frequency bands in the working band will deteriorate due to the gradual four-ridge structure, and the maximum standing wave ratio in the band is high, that is, the matching in the band is not good, and it is easy to introduce multiple reflection effects in the measurement. increase measurement error
[0006] As far as the existing technology is concerned, the aperture waveguide antenna still has room for improvement in terms of in-band impedance matching

Method used

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  • Dual-polarized slotted waveguide antenna based on stepped four-ridge transition
  • Dual-polarized slotted waveguide antenna based on stepped four-ridge transition
  • Dual-polarized slotted waveguide antenna based on stepped four-ridge transition

Examples

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Effect test

Embodiment 1

[0032] refer to figure 1 , a dual-polarized apertured waveguide antenna based on a stepped four-ridge transition, including an apertured waveguide 1, a shielded metal plate 2, a microstrip balun 3, a feeding coaxial line 4, and a ridge plate 5;

[0033] The open waveguide 1 adopts a square waveguide structure with one end open and one end closed, and the structure of the closed end is as follows: figure 2 As shown in (a), the side length of its cross section is equal to the length of the long side of the WR90 standard rectangular waveguide, and four round holes are opened at its closed end, which are used to connect the spine board 5 and the microstrip balun 3 by the coaxial line Channels are provided, four through holes are symmetrical about the central axis of the open waveguide 1 and are 2.5 mm away from the central axis, the radius of the circular holes is 1.5 mm, and the longitudinal section of the open waveguide 1 is shown in figure 2 As shown in (b), the length of th...

Embodiment 2

[0038] The structure of this embodiment is the same as that of Embodiment 1, only for the minimum distance d between each pair of ridges 5 of the four pairs of ridges 5 facing each other, the thickness t of the ridges 5, and the step number N of the step change section 51 , the length l of the input microstrip line 32 1 and width w 1 , the length l of the two ends of the dumbbell-shaped gap of the metal floor 34 2 , width w 2 , the length in the middle of the gap l 3 , width w 3 and the length l of the output microstrip line 33 parallel to the Z-axis 4 , width w 4 , the length l of the part perpendicular to the Z axis 5 , with a width of w 5 Made adjustments:

[0039] The minimum distance d=0.6mm between each pair of ridge plates 5; the thickness t=1mm of the ridge plate 1; the number of steps in the step change section 51 N=3, and the step spacing of the ridge plate pairs along the positive direction of the Z axis in turn Increase, the length of the ridge plate paral...

Embodiment 3

[0041] The structure of this embodiment is the same as that of Embodiment 1, only for the minimum distance d between each pair of ridges 5 of the four pairs of ridges 5 facing each other, the thickness t of the ridges 5, and the step number N of the step change section 51 , the length l of the input microstrip line 32 1 and width w 1 , the length l of the two ends of the dumbbell-shaped gap of the metal floor 34 2 , width w 2 , the length in the middle of the gap l 3 , width w 3 and the length l of the output microstrip line 33 parallel to the Z-axis 4 , width w 4 , the length l of the part perpendicular to the Z axis 5 , with a width of w 5 Made adjustments:

[0042] The minimum distance d=3mm between each pair of ridges 5; the thickness t=5mm of the ridges 5; the number of steps in the step change section 51 N=8, and the step spacing of the ridges in the positive direction of the Z axis increases sequentially , the length of the ridge plate parallel to the Z-axis × ...

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Abstract

The invention provides a step-shaped four-ridge transition-based dual polarization opening waveguide antenna. The antenna in-band radiation gain and input port isolation degree are ensured while the in-band matching characteristic of the antenna is improved. The dual polarization opening waveguide antenna comprises an opening waveguide, a shielding metal plate, a microstrip balun, a feed coaxial line and ridge plates; the ridge plates consist of two ridge plate pairs which are fixed in the opening waveguide and distributed in a crosswise structure; each ridge plate pair consists of ridge plates with step change sections and impedance deploying sections; the microstrip balun is isolated through the shielding metal plate, and fixed on the outer side of the sealed end of the opening waveguidethrough a dielectric frame; one sealed side of the opening waveguide is connected with a metal floor through the shielding layer of the feed coaxial line; and each impedance deploying section is connected with the output microstrip line through an inner core. The dual polarization opening waveguide antenna has high in-band matching, high cross polarization identification degree and high isolationdegree characteristics and can be used for an antenna metering standard apparatus.

Description

technical field [0001] The invention belongs to the technical field of antennas, and relates to an apertured waveguide antenna, in particular to a dual-polarized apertured waveguide antenna based on a stepped four-ridge transition, which is specially used for an antenna measurement standard device. Background technique [0002] In terms of antenna standard measurement devices, antenna measurement is a means to obtain parameters such as antenna pattern, gain, polarization, and phase center through the measurement system to receive and process the near-field or far-field radiation field of the antenna to be measured. In the measurement of various antenna parameters, standard antennas and probes are indispensable measurement devices. High-quality standard antennas and probes are technical equipment for accurately measuring antenna parameters. Their performance directly determines the quality of measurement results. Internal impedance matching is one of the key factors affecting...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q13/06H01Q1/36H01Q1/48H01Q1/50H01Q1/52
CPCH01Q1/36H01Q1/48H01Q1/50H01Q1/52H01Q13/06
Inventor 姜文俞亚庆陈帅洪涛龚书喜
Owner XIDIAN UNIV
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