CN105206909A - Directional coupler based on substrate integrated waveguide broadside slot coupling - Google Patents
Directional coupler based on substrate integrated waveguide broadside slot coupling Download PDFInfo
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- CN105206909A CN105206909A CN201510574504.9A CN201510574504A CN105206909A CN 105206909 A CN105206909 A CN 105206909A CN 201510574504 A CN201510574504 A CN 201510574504A CN 105206909 A CN105206909 A CN 105206909A
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Abstract
The invention relates to a directional coupler, in particular to a directional coupler based on substrate integrated waveguide broadside slot coupling, and belongs to the field of wireless communication. The directional coupler based on substrate integrated waveguide broadside slot coupling aims at solving the problems that an existing directional coupler is high in section, heavy and not prone to integration. The directional coupler based on substrate integrated waveguide broadside slot coupling comprises a first medium substrate, a second medium substrate, a first metal layer, a second metal layer, a third metal layer, two front face microstrip lines and two back face microstrip lines, the first medium substrate and the second medium substrate are both rectangular plate bodies, the first metal layer, the second metal layer and the third metal layer are each shaped like a rectangle, and the first medium substrate and the second medium substrate are arranged side by side from top to bottom.
Description
Technical field
The present invention relates to a kind of directional coupler, be specifically related to a kind of directional coupler based on substrate integration wave-guide broadside slot-coupled, belong to wireless communication field.
Background technology
Substrate integration wave-guide is that a kind of realization on dielectric substrate is similar to the guided wave structure formed of metal rectangular waveguide characteristic, because this structure has Low emissivity, filter with low insertion loss, miniaturization, is easy to the advantage such as integrated, become the focus of research, be also widely used in the design of directional coupler.By means of printed circuit technology, the low cost batch production based on the directional coupler of substrate integration wave-guide is called possibility.Existing directional coupler section is high, weight large, it is integrated to be not easy to.
Summary of the invention
In order to solve, existing directional coupler section is high, weight large, it is integrated to be not easy in the present invention, hinders the problem of directional coupler development, and then proposes a kind of directional coupler based on substrate integration wave-guide broadside slot-coupled.
The present invention is the technical scheme taked that solves the problem: the present invention includes first medium substrate, second medium substrate, the first metal layer, second metal level, 3rd metal level, two front microstrip lines and two back side microstrip lines, first medium substrate and second medium substrate are all rectangle plate bodys, the first metal layer, second metal level, 3rd metal level is all rectangles, first medium substrate, second medium substrate is from top to bottom arranged side by side, second metal level is arranged between the lower surface of first medium substrate and the upper surface of second medium substrate, and the second metal level has rectangular aperture, the first metal layer is printed on the middle part of first medium upper surface of base plate, 3rd metal level is printed on the middle part of second medium base lower surface, the two ends of each the first metal layer are connected with one end of a front microstrip line respectively, the two ends of each 3rd metal level are connected with one end of a back side microstrip line respectively, the other end of each front microstrip line is all connected with a side of first medium upper surface of base plate, the other end of each back side microstrip line is all connected with a side of second medium substrate, the both sides of the edge of the first metal layer have multiple metallization via hole along its length, each metallization via hole is by passing the first metal layer successively, first medium substrate, second metal level, second medium substrate, 3rd metal level, first medium substrate, the first metal layer, second metal level forms the first substrate integrated wave guide structure, second medium substrate, 3rd metal level, second metal level forms the second substrate integrated wave guide structure, the common waveguide broadside of described first substrate integrated wave guide structure and described second substrate integrated wave guide structure namely the second metal level has rectangular aperture.
The invention has the beneficial effects as follows: simulation result shows, the directional coupler designed by the present invention reflection coefficient of input and voltage transmission coefficient of isolated port in the frequency range of 4.90 ~ 7.94GHz are all less than-15dB, and relative bandwidth reaches 47.35%.The power transmission factor of coupling port is between-2.4dB ~-7.2dB, and the phase difference of straightthrough port and coupling aperture is 90
oleft and right.
Accompanying drawing explanation
Fig. 1 is Facad structure schematic diagram of the present invention, and Fig. 2 is structure schematic diagram of the present invention, and Fig. 3 is sectional view of the present invention, Fig. 4 to be S parameter simulation result figure, Fig. 5 of the present invention be straight-through port of the present invention and coupling port phase difference and frequency relation figure.
Embodiment
Embodiment one: composition graphs 1 to Fig. 3 illustrates present embodiment, described in present embodiment, a kind of directional coupler based on substrate integration wave-guide broadside slot-coupled comprises first medium substrate 1, second medium substrate 2, the first metal layer 3, second metal level 4, 3rd metal level 5, two front microstrip lines 6 and two back side microstrip lines 7, first medium substrate 1 and second medium substrate 2 are all rectangle plate bodys, the first metal layer 3, second metal level 4, 3rd metal level 5 is all rectangles, first medium substrate 1, second medium substrate 2 is from top to bottom arranged side by side, second metal level 4 is arranged between the lower surface of first medium substrate 1 and the upper surface of second medium substrate 2, and the second metal level 4 has rectangular aperture 9, the first metal layer 3 is printed on the middle part of first medium substrate 1 upper surface, 3rd metal level 5 is printed on the middle part of second medium substrate 2 lower surface, the two ends of each the first metal layer 3 are connected with one end of a front microstrip line 6 respectively, the two ends of each 3rd metal level 5 are connected with one end of a back side microstrip line 7 respectively, the other end of each front microstrip line 6 is all connected with a side of first medium substrate 1 upper surface, the other end of each back side microstrip line 7 is all connected with a side of second medium substrate 2, the both sides of the edge of the first metal layer 3 have multiple metallization via hole 8 along its length, each metallization via hole 8 is by passing the first metal layer 3 successively, first medium substrate 1, second metal level 4, second medium substrate 2, 3rd metal level 5, first medium substrate 1, the first metal layer 3, second metal level 4 forms the first substrate integrated wave guide structure, second medium substrate 2, 3rd metal level 5, second metal level 4 forms the second substrate integrated wave guide structure, the common waveguide broadside of described first substrate integrated wave guide structure and described second substrate integrated wave guide structure namely the second metal level 4 has rectangular aperture 9.
Embodiment two: composition graphs 1 to Fig. 3 illustrates present embodiment, a kind of first medium substrate 1 of the directional coupler based on substrate integration wave-guide broadside slot-coupled described in present embodiment and the length of second medium substrate 2 are 280mm, the width of first medium substrate 1 and second medium substrate 2 is 24.86mm, the thickness of first medium substrate 1 and second medium substrate 2 is 1.5mm, and the relative dielectric constant of first medium substrate 1 and second medium substrate 2 is 4.4.
The technique effect of present embodiment is: so arrange, and directional coupler can be made to have less physical dimension.Other composition and annexation identical with embodiment one.
Embodiment three: composition graphs 1 to Fig. 3 illustrates present embodiment, a kind of the first metal layer 3 of the directional coupler based on substrate integration wave-guide broadside slot-coupled described in present embodiment and the length of the 3rd metal level 5 are 200mm, the width of the first metal layer 3 and the 3rd metal level 5 is 24.86mm, the thickness of the first metal layer 3 and the 3rd metal level 5 is 0.035mm, and the thickness of the second metal level 4 is 0.07mm.
The technique effect of present embodiment is: so arrange, and can optimize the degree of coupling of directional coupler.Other composition and annexation identical with embodiment one.
Embodiment four: composition graphs 1 to Fig. 3 illustrates present embodiment, each front microstrip line 6 of a kind of directional coupler based on substrate integration wave-guide broadside slot-coupled described in present embodiment is connected to form successively by front first paragraph 6-1, front second segment 6-2, the 3rd section, front 6-3 and the 4th section, front 6-4 head and the tail, and each back side microstrip line 7 is connected to form successively by back side first paragraph 7-1, back side second segment 7-2, the 3rd section, back side 7-3 and the 4th section, back side 7-4 head and the tail.
The technique effect of present embodiment is: so arrange, and can reduce the reflection coefficient that energy enters into directional coupler waveguides section, is easy to coupling.Other composition and annexation identical with embodiment one.
Embodiment five: composition graphs 1 to Fig. 3 illustrates present embodiment, a kind of front first paragraph 6-1 of the directional coupler based on substrate integration wave-guide broadside slot-coupled described in present embodiment and the length L1 of back side first paragraph 7-1 is 10mm, the length L2 of front second segment 6-2 and back side second segment 7-2 is 10mm, the length L3 of the 3rd section, front 6-3 and the 3rd section of 6-3 in the back side is 10mm, the width W 1 of front first paragraph 6-1 and back side first paragraph 7-1 is 10mm, and the width W 2 of the 3rd section, front 6-3 and the 3rd section of 7-3 in the back side is 3.4mm.
The technique effect of present embodiment is: so arrange, and the input impedance of directional coupler can be made close to 50 Ω of sub-miniature A connector, be convenient to feed.Other composition and annexation identical with embodiment four.
Embodiment six: composition graphs 1 to Fig. 3 illustrates present embodiment, described in present embodiment, a kind of length of rectangular aperture 9 of the directional coupler based on substrate integration wave-guide broadside slot-coupled is 60mm, and the width of rectangular aperture 9 is 5mm.
The technique effect of present embodiment is: so arrange, and can optimize the degree of coupling of directional coupler.Other composition and annexation identical with embodiment one.
Embodiment seven: composition graphs 1 to Fig. 3 illustrates present embodiment, the radius of each metallization via hole 8 of a kind of directional coupler based on substrate integration wave-guide broadside slot-coupled described in present embodiment is 0.5mm, and the centre-to-centre spacing of adjacent two metallization via holes 8 is 2mm.
The technique effect of present embodiment is: so arrange, and electromagnetic energy can be made effectively to be shielded in substrate integration wave-guide, and waveguide can be made to have comparatively high structural strength.Other composition and annexation identical with embodiment one.
Operation principle
Substrate integrated waveguide directioning coupler of the present invention adopts and opens at broadside the directional couple function that rectangular gap realizes electromagnetic energy, cracks, make the structure of whole coupler more compact relative to traditional on narrow limit, achieves miniaturized target.
Claims (7)
1. the directional coupler based on substrate integration wave-guide broadside slot-coupled, it is characterized in that: described a kind of directional coupler based on substrate integration wave-guide broadside slot-coupled comprises first medium substrate (1), second medium substrate (2), the first metal layer (3), second metal level (4), 3rd metal level (5), two front microstrip lines (6) and two back side microstrip lines (7), first medium substrate (1) and second medium substrate (2) are all rectangle plate bodys, the first metal layer (3), second metal level (4), 3rd metal level (5) is all rectangles, first medium substrate (1), second medium substrate (2) is from top to bottom arranged side by side, second metal level (4) is arranged between the lower surface of first medium substrate (1) and the upper surface of second medium substrate (2), and the second metal level (4) has rectangular aperture (9), the first metal layer (3) is printed on the middle part of first medium substrate (1) upper surface, 3rd metal level (5) is printed on the middle part of second medium substrate (2) lower surface, the two ends of each the first metal layer (3) are connected with one end of a front microstrip line (6) respectively, the two ends of each 3rd metal level (5) are connected with one end of a back side microstrip line (7) respectively, the other end in each front microstrip line (6) is all connected with a side of first medium substrate (1) upper surface, the other end at each back side microstrip line (7) is all connected with a side of second medium substrate (2), the both sides of the edge of the first metal layer (3) have multiple metallization via hole (8) along its length, each metallization via hole (8) is by passing the first metal layer (3) successively, first medium substrate (1), second metal level (4), second medium substrate (2), 3rd metal level (5), first medium substrate (1), the first metal layer (3), second metal level (4) forms the first substrate integrated wave guide structure, second medium substrate (2), 3rd metal level (5), second metal level (4) forms the second substrate integrated wave guide structure, the common waveguide broadside of described first substrate integrated wave guide structure and described second substrate integrated wave guide structure namely the second metal level (4) has rectangular aperture (9).
2. a kind of directional coupler based on substrate integration wave-guide broadside slot-coupled according to claim 1, it is characterized in that: the length of first medium substrate (1) and second medium substrate (2) is 280mm, the width of first medium substrate (1) and second medium substrate (2) is 24.86mm, the thickness of first medium substrate (1) and second medium substrate (2) is 1.5mm, and the relative dielectric constant of first medium substrate (1) and second medium substrate (2) is 4.4.
3. a kind of directional coupler based on substrate integration wave-guide broadside slot-coupled according to claim 1, it is characterized in that: the length of the first metal layer (3) and the 3rd metal level (5) is 200mm, the width of the first metal layer (3) and the 3rd metal level (5) is 24.86mm, the thickness of the first metal layer (3) and the 3rd metal level (5) is 0.035mm, and the thickness of the second metal level (4) is 0.07mm.
4. a kind of directional coupler based on substrate integration wave-guide broadside slot-coupled according to claim 1, it is characterized in that: each front microstrip line (6) is connected to form successively by front first paragraph (6-1), front second segment (6-2), the 3rd section, front (6-3) and the 4th section, front (6-4) head and the tail, each back side microstrip line (7) is connected to form successively by back side first paragraph (7-1), back side second segment (7-2), the 3rd section, the back side (7-3) and the 4th section, the back side (7-4) head and the tail.
5. a kind of directional coupler based on substrate integration wave-guide broadside slot-coupled according to claim 4, it is characterized in that: the length (L1) of front first paragraph (6-1) and back side first paragraph (7-1) is 10mm, the length (L2) of front second segment (6-2) and back side second segment (7-2) is 10mm, the length (L3) at the 3rd section, front (6-3) and the 3rd section, the back side (6-3) is 10mm, the width (W1) of front first paragraph (6-1) and back side first paragraph (7-1) is 10mm, the width (W2) at the 3rd section, front (6-3) and the 3rd section, the back side (7-3) is 3.4mm.
6. a kind of directional coupler based on substrate integration wave-guide broadside slot-coupled according to claim 1, it is characterized in that: the length of rectangular aperture (9) is 60mm, the width of rectangular aperture (9) is 5mm.
7. a kind of directional coupler based on substrate integration wave-guide broadside slot-coupled according to claim 1, it is characterized in that: the radius of each metallization via hole (8) is 0.5mm, the centre-to-centre spacing of adjacent two metallization via hole (8) is 2mm.
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| CN201510574504.9A CN105206909A (en) | 2015-09-10 | 2015-09-10 | Directional coupler based on substrate integrated waveguide broadside slot coupling |
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| CN201510574504.9A CN105206909A (en) | 2015-09-10 | 2015-09-10 | Directional coupler based on substrate integrated waveguide broadside slot coupling |
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Cited By (2)
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| CN106374181A (en) * | 2016-10-26 | 2017-02-01 | 哈尔滨工业大学 | Substrate integrated waveguide directional coupler based on semi-mode waveguide structure |
| CN106532217A (en) * | 2016-10-26 | 2017-03-22 | 哈尔滨工业大学 | Full-modal-waveguide-structure-based substrate-integrated waveguide directional coupler |
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| CN200965912Y (en) * | 2006-10-20 | 2007-10-24 | 东南大学 | Seminorm substrate integral waveguide 90 degree 3-dB directional coupler |
| CN101170214A (en) * | 2007-11-12 | 2008-04-30 | 杭州电子科技大学 | Dimension reduction low profile rear cavity line polarization antenna |
| CN102142593A (en) * | 2010-02-02 | 2011-08-03 | 南京理工大学 | Small broadband substrate integrated waveguide planar magic-T structure |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106374181A (en) * | 2016-10-26 | 2017-02-01 | 哈尔滨工业大学 | Substrate integrated waveguide directional coupler based on semi-mode waveguide structure |
| CN106532217A (en) * | 2016-10-26 | 2017-03-22 | 哈尔滨工业大学 | Full-modal-waveguide-structure-based substrate-integrated waveguide directional coupler |
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