CN113300062A - Dual-band duplexer based on microstrip ridge gap waveguide and application - Google Patents
Dual-band duplexer based on microstrip ridge gap waveguide and application Download PDFInfo
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- CN113300062A CN113300062A CN202110408487.7A CN202110408487A CN113300062A CN 113300062 A CN113300062 A CN 113300062A CN 202110408487 A CN202110408487 A CN 202110408487A CN 113300062 A CN113300062 A CN 113300062A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/20—Frequency-selective devices, e.g. filters
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/20—Frequency-selective devices, e.g. filters
- H01P1/207—Hollow waveguide filters
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/20—Frequency-selective devices, e.g. filters
- H01P1/207—Hollow waveguide filters
- H01P1/208—Cascaded cavities; Cascaded resonators inside a hollow waveguide structure
- H01P1/2082—Cascaded cavities; Cascaded resonators inside a hollow waveguide structure with multimode resonators
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/20—Frequency-selective devices, e.g. filters
- H01P1/213—Frequency-selective devices, e.g. filters combining or separating two or more different frequencies
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/20—Frequency-selective devices, e.g. filters
- H01P1/213—Frequency-selective devices, e.g. filters combining or separating two or more different frequencies
- H01P1/2138—Frequency-selective devices, e.g. filters combining or separating two or more different frequencies using hollow waveguide filters
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Abstract
The invention belongs to the technical field of microwave devices, and discloses a dual-band duplexer based on microstrip ridge gap waveguide and application thereof, wherein the dual-band duplexer is provided with an upper dielectric plate and a lower dielectric plate; the upper surface of the upper-layer dielectric slab is a metal floor, metallized through holes are respectively embedded in the two sides and the middle of the dielectric slab, and three grounding coplanar waveguide-microstrip gap waveguide transition structures are loaded on the lower surface; the upper surface of the lower dielectric slab is loaded with a metal ridge, the four microstrip ridge gap waveguide dual-mode resonators and a T-shaped three-port matching network, two sides of the metal ridge are loaded with mushroom-shaped EBG structures, and the lower surface of the metal ridge is a metal floor; two sections of metal ridges are loaded between the microstrip ridge gap waveguide dual-mode resonators on the upper surface of the lower dielectric plate respectively and are of coupling structures. The invention designs the dual-band duplexer by utilizing the microstrip gap waveguide dual-mode resonator for the first time, has the advantage of compact structure, each channel of the duplexer has two passbands, and the frequency of the passbands is easy to independently control.
Description
Technical Field
The invention belongs to the technical field of microwave devices, and particularly relates to a dual-band duplexer based on microstrip ridge gap waveguides and application thereof.
Background
At present: duplexers provide separate channels for transmitters and receivers connected to the same antenna, and play an important role in transceivers in the front-end of frequency division duplex systems. With the rapid development of modern wireless communication systems, the requirements for multiband and miniaturization of duplexers are higher and higher. The gap waveguide technology is used as a new electromagnetic transmission and shielding structure, has the characteristic of non-electric contact, and effectively reduces the problem of poor performance caused by poor electric contact of a circuit. The gap waveguide technology provides convenience in circuit packaging, circuit design, and antenna design due to the advantage of non-electrical contact. The gap waveguide technology comprises ridge gap waveguide, slot gap waveguide, microstrip gap waveguide and the like, and the microstrip ridge gap waveguide is adopted in the invention. With the trend of communication systems toward multi-protocol and multi-band development, the demand of the communication systems for multi-band operation of microwave devices is becoming stronger. Only one gap waveguide duplexer has been reported, and such a duplexer has only one passband in each channel, which has the disadvantage of not satisfying the requirement of multiband operation of the communication system.
Through the above analysis, the problems and defects of the prior art are as follows: under the trend that the communication system develops towards the direction of multiple protocols and multiple frequency bands, the demand of the communication system on the multi-band operation of the microwave device is more and more strong; the existing microstrip gap waveguide duplexer has only one pass band in each channel, and does not meet the requirement of multiband operation of a communication system, for example: the broadcasting planning frequency band is 14.5 to 14.8GHz and 17.3 to 17.8GHz, and the downlink is 11.7 to 12.2 GHz. In addition, the microstrip gap waveguide duplexer needs to be capable of flexibly adjusting to a desired frequency band.
The difficulty in solving the above problems and defects is: how to design a good T-shaped three-port matching network based on the microstrip ridge gap waveguide technology, and how to design an effective coupling structure in the microstrip ridge gap waveguide to adjust the T-shaped three-port matching network to feed the resonator, so that the performance of the duplexer is good.
The significance of solving the problems and the defects is as follows: on the premise of a microstrip ridge gap waveguide dual-mode resonator with a controllable passband, how to realize the miniaturization and multi-band of the microstrip ridge gap waveguide duplexer becomes a crucial problem. At present, no report of the design of the gap waveguide based duplexer is found in a dual-band duplexer based on microstrip ridge gap waveguides. The invention provides a dual-band duplexer based on microstrip ridge gap waveguides, which realizes multi-frequency of the microstrip ridge gap waveguide duplexer, meets the requirement of multi-frequency-band work of a communication system and enables the gap waveguides to be more widely applied.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a dual-band duplexer based on microstrip ridge gap waveguide and application thereof.
The invention is realized in this way, a dual-band duplexer based on microstrip ridge gap waveguide, which is provided with:
two layers of dielectric substrates; an upper dielectric plate and a lower dielectric plate respectively;
the upper surface of the upper-layer dielectric slab is a metal floor, metallized through holes are respectively embedded in the two sides and the middle of the dielectric slab, and three grounding coplanar waveguide-microstrip gap waveguide transition structures are loaded on the lower surface;
the upper surface of the lower dielectric slab is loaded with a metal ridge, the four microstrip ridge gap waveguide dual-mode resonators and a T-shaped three-port matching network, two sides of the metal ridge are loaded with mushroom-shaped EBG structures, and the lower surface of the metal ridge is a metal floor;
two sections of metal ridges are loaded between the microstrip ridge gap waveguide dual-mode resonators on the upper surface of the lower dielectric plate respectively and are of coupling structures.
Furthermore, the three grounding coplanar waveguide-microstrip gap waveguide transition structures are realized by embedding a series of metalized via holes in the upper dielectric slab to ground the coplanar waveguides on the lower surface of the upper dielectric slab, and the three grounding coplanar waveguide-microstrip gap waveguide transition structures are a first grounding coplanar waveguide, a second grounding coplanar waveguide and a third grounding coplanar waveguide; the second grounding coplanar waveguide is a common port of the dual-band duplexer based on the microstrip ridge gap waveguide, and the first grounding coplanar waveguide and the third grounding coplanar waveguide are two isolated ports of the duplexer.
Furthermore, the microstrip ridge gap waveguide dual-mode resonator is composed of two rows of edge metalized through holes embedded in the direction parallel to the Y axis of the lower-layer dielectric plate and a metal patch, and the metal patch is provided with a metalized through hole in the center and is grounded to the metal floor on the upper surface of the upper-layer dielectric plate.
Furthermore, the coupling structure is composed of two sections of metal ridges loaded between two microstrip ridge gap waveguide dual-mode resonators on the upper surface of the lower dielectric slab.
Furthermore, the T-shaped three-port matching network is composed of a Y-shaped metal ridge on the upper surface of the lower dielectric plate and a metal through hole below the Y-shaped metal ridge.
The invention also aims to provide an application of the dual-band duplexer based on the microstrip ridge gap waveguide in a microwave device.
The invention also aims to provide an application of the dual-band duplexer based on the microstrip ridge gap waveguide in the gap waveguide technology.
The invention also aims to provide an application of the dual-band duplexer based on the microstrip ridge gap waveguide in circuit packaging.
The invention also aims to provide an application of the dual-band duplexer based on the microstrip ridge gap waveguide in circuit design.
The invention also aims to provide an application of the dual-band duplexer based on the microstrip ridge gap waveguide in antenna design.
By combining all the technical schemes, the invention has the advantages and positive effects that: the invention provides a dual-band duplexer based on microstrip ridge gap waveguides, which comprises a grounding coplanar waveguide-microstrip gap waveguide transition structure, a T-shaped three-port matching network and a microstrip gap waveguide dual-mode resonator. The transition structure of the grounding coplanar waveguide and the microstrip gap waveguide realizes grounding by embedding a series of metalized via holes in the upper dielectric slab to the coplanar waveguide on the lower surface of the upper dielectric slab. The T-shaped three-port matching network consists of a Y-shaped metal ridge on the upper surface of the lower dielectric plate and a metal through hole below the Y-shaped metal ridge. The duplexer based on the microstrip ridge gap waveguide adopts the dual-mode resonator, and effectively realizes dual-frequency of the microstrip ridge gap waveguide duplexer.
The invention designs a compact microstrip ridge gap waveguide dual-band duplexer, which consists of four dual-mode resonant cavities and a microstrip ridge gap waveguide T-shaped three-port matching network. The dual-band duplexer adopts a microstrip ridge gap waveguide dual-mode resonator, and can generate a microstrip resonance mode and a cavity resonance mode. The two resonance modes of the microstrip ridge gap waveguide resonator are highly independent, so that the passband of the dual band duplexer can be easily tuned to a desired frequency. The invention provides a dual-band duplexer based on microstrip ridge gap waveguide for the first time, and the dual-band of the microstrip ridge gap waveguide duplexer is effectively realized. As shown in fig. 4, the passbands of the second-order dual-band IMRGW duplexer of the embodiment of the present invention are respectively 13.13 to 13.38GHz, 14.85 to 15.26GHz, 18.57 to 19.42GHz, and 20.85 to 21.35GHz, and the relative bandwidths are respectively 2%, 2.7%, 4.8%, and 2.4%.
Drawings
Fig. 1 and fig. 2 are schematic structural diagrams of a dual-band duplexer based on a microstrip ridge gap waveguide according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a first grounded coplanar waveguide, a second grounded coplanar waveguide, and a third grounded coplanar waveguide provided by an embodiment of the present invention;
in fig. 1, 2 and 3: 1. a first metal floor; 2. an upper dielectric plate; 3. a lower dielectric plate; 4. a lower metal floor; 5. a first grounded coplanar waveguide; 6. a second grounded coplanar waveguide; 7. a third grounded coplanar waveguide; 8. a metal ridge; 9. pasting an EBG structure; 10. a resonator metal patch; 11. a resonator edge metallization via; 12. a resonator center metallized via; 13. a coupling structure; 14. a first resonator; 15. a second resonator; 16. a third resonator; 17. a fourth resonator; 18. t type three port matching network.
Fig. 4 is an S parameter diagram of a dual-band duplexer based on microstrip ridge gap waveguides provided by an example of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Aiming at the problems in the prior art, the invention provides a dual-band duplexer based on a microstrip ridge gap waveguide and application thereof, and the invention is described in detail with reference to the accompanying drawings.
As shown in fig. 1, the dual-band duplexer based on microstrip ridge gap waveguide provided by the embodiment of the present invention includes: the three-port matching network comprises a first metal floor 1, an upper-layer dielectric plate 2, a lower-layer dielectric plate 3, a lower-layer metal floor 4, a first grounding coplanar waveguide 5, a second grounding coplanar waveguide 6, a third grounding coplanar waveguide 7, a metal ridge 8, an EBG (electromagnetic band gap) structure patch 9, a resonator metal patch 10, a resonator edge metalized via hole 11, a resonator center metalized via hole 12, a coupling structure 13, a first resonator 14, a second resonator 15, a third resonator 16, a fourth resonator 17 and a T-shaped three-port matching network 18.
The invention adopts two layers of dielectric plates: the upper dielectric plate 2 and the lower dielectric plate 3 are provided with mushroom-shaped EBG structures 9 which are symmetrical about a metal ridge 8, the lower surface of the upper dielectric plate 2 is provided with coplanar waveguides, the coplanar waveguides are grounded by embedding a series of metalized through holes in the upper dielectric plate 2, the transition structure of the grounded coplanar waveguide-microstrip gap waveguide is a first grounded coplanar waveguide 5, a second grounded coplanar waveguide 6 and a third grounded coplanar waveguide 7, a first resonator 14, a second resonator 15, a third resonator 16 and a fourth resonator 17 are formed by two rows of edge metalized through holes 11 and a metal patch 10 which are embedded in the lower dielectric plate 3 in the direction parallel to the Y axis, and the center of the metal patch is provided with a metalized through hole 12 which is grounded to the first metal floor 1 on the upper surface of the upper dielectric plate. Two sections of metal ridges are loaded between three microstrip ridge gap waveguide dual-mode first resonators 14 and two second resonators 15 on the upper surface of the lower dielectric plate 3 and between a third resonator 16 and a fourth resonator 17 to form a coupling structure 13, and a T-shaped three-port matching network 18 is located between the second resonator 15 and the third resonator 16 and consists of a Y-shaped metal ridge 8 on the upper surface of the lower dielectric plate 3 and a metal through hole below the Y-shaped metal ridge.
The medium plate 2 of the upper layer and the medium plate 3 of the lower layer adopt Rogers 5880 materials with the relative dielectric constant of 2.2, the loss tangent is only 0.0009, the thickness of the medium plate 2 of the upper layer is 0.508mm, the length is 75mm, the width is 31.15mm, the thickness of the medium plate 3 of the lower layer is 1.575mm, the length is 75mm, and the width is 31.15 mm. The size of the metal patch used for forming the EBG structure is 2.3mm multiplied by 2.3mm, and the diameter of the metal through hole is 0.4 mm. The width of the metal ridge is 4.5mm, the diameter of the metalized via hole at the edge of the resonator is 0.4mm, the distance between the metalized via holes is 0.8mm, the diameter of the metalized via hole at the center of the resonator is 0.6mm, the lengths of the metal patches of the first resonator 14 and the second resonator 15 are 5mm, the width of the metal patches is 2mm, the width of the tail end of the metal patches is 3mm, the lengths of the metal patches of the third resonator 16 and the fourth resonator 17 are 4.1mm, the width of the metal patches of the third resonator is 2mm, the width of the tail end of the metal patches is 3mm, the length of the coupling structure between the first resonator 14 and the second resonator 15 is 3.36mm, the width of the coupling structure between the third resonator 16 and the fourth resonator 17 is 4.5mm, the lengths of the triangular patch right-angle side at the left side of the T-shaped three-port matching network 18 are 5.4mm and 4.6mm respectively, and the lengths of the triangular patch right-angle side at the left side are 7.1mm and 4.6mm respectively.
Fig. 4 is an S parameter diagram of a second-order dual-band microstrip-gap waveguide duplexer based on microstrip ridge-gap waveguides according to an embodiment of the present invention. As can be seen from fig. 4, the second-order dual-frequency microstrip gap waveguide duplexer has good matching, the return loss of four passbands is better than-15 dB, the central frequencies of two passbands of the right port of the second-order dual-frequency microstrip gap waveguide duplexer are respectively 13.24GHz and 19.01GHz, the relative bandwidths are respectively 2% and 4.8%, the in-band insertion losses are respectively about 1.1dB and 1.5dB, the central frequencies of two passbands of the left port are respectively 14.98GHz and 21.09GHz, the relative bandwidths are respectively 2.7% and 2.4%, and the in-band insertion losses are respectively about 1.2dB and 2.5 dB.
The invention not only couples weak receiving signals, but also feeds larger transmitting power to the antenna, and requires the two to respectively complete the functions without mutual influence. For example, the present invention may receive signals having center frequencies of 14.98GHz and 21.09GHz, respectively, from the left port, and input the signals to the signal receiver via the intermediate common port; meanwhile, signals with the center frequencies of 13.24GHz and 19.01GHz are input into the middle public port, and the signals are fed to the antenna through the right port and then are transmitted. Due to the high isolation between the left and right channels, the input and output signals do not interact with each other. In some application occasions, the invention can replace a quadruplex device. The invention requires four resonators, while a quadplexer with the same performance requires eight resonators, proving that the invention has a miniaturization function.
In the description of the present invention, "a plurality" means two or more unless otherwise specified; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The above description is only for the purpose of illustrating the present invention and the appended claims are not to be construed as limiting the scope of the invention, which is intended to cover all modifications, equivalents and improvements that are within the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. The utility model provides a dual-frenquency duplexer based on microstrip ridge clearance waveguide which characterized in that, dual-frenquency duplexer based on microstrip ridge clearance waveguide is provided with:
two layers of dielectric substrates; an upper dielectric plate and a lower dielectric plate respectively;
the upper surface of the upper-layer dielectric slab is a metal floor, metallized through holes are respectively embedded in the two sides and the middle of the dielectric slab, and three grounding coplanar waveguide-microstrip gap waveguide transition structures are loaded on the lower surface;
the upper surface of the lower dielectric slab is loaded with a metal ridge, the four microstrip ridge gap waveguide dual-mode resonators and a T-shaped three-port matching network, two sides of the metal ridge are loaded with mushroom-shaped EBG structures, and the lower surface of the metal ridge is a metal floor;
two sections of metal ridges are loaded between the microstrip ridge gap waveguide dual-mode resonators on the upper surface of the lower dielectric plate respectively and are of coupling structures.
2. The dual-band duplexer based on the microstrip ridge gap waveguide as claimed in claim 1, wherein the three grounded coplanar waveguide-microstrip gap waveguide transition structures are implemented by embedding a series of metalized via holes in the upper dielectric slab to ground coplanar waveguides on the lower surface of the upper dielectric slab, and the three grounded coplanar waveguide-microstrip gap waveguide transition structures are a first grounded coplanar waveguide, a second grounded coplanar waveguide and a third grounded coplanar waveguide; the second grounding coplanar waveguide is a common port of the dual-band duplexer based on the microstrip ridge gap waveguide, and the first grounding coplanar waveguide and the third grounding coplanar waveguide are two isolated ports of the duplexer.
3. The microstrip ridge gap waveguide-based dual-band duplexer of claim 1, wherein the microstrip ridge gap waveguide dual-mode resonator is composed of two rows of edge metalized via holes embedded in the lower dielectric plate in a direction parallel to the Y-axis and a metal patch, and the metal patch has a metalized via hole in the center thereof grounded to the metal floor on the upper surface of the upper dielectric plate.
4. The microstrip ridge gap waveguide-based dual band duplexer of claim 1, wherein the coupling structure is formed by two metal ridges loaded between two microstrip ridge gap waveguide dual mode resonators on the upper surface of the lower dielectric slab.
5. The microstrip ridge gap waveguide-based dual band duplexer of claim 1, wherein the T-shaped three-port matching network is composed of a Y-shaped metal ridge on the upper surface of the lower dielectric slab and a metal via below the metal ridge.
6. Use of the microstrip ridge gap waveguide-based dual band duplexer in a microwave device according to any one of claims 1 to 5.
7. Use of the microstrip ridge gap waveguide based dual band duplexer according to any of claims 1-5 in gap waveguide technology.
8. Use of a microstrip ridge gap waveguide based dual band duplexer in a circuit package according to any of claims 1-5.
9. Use of a microstrip ridge gap waveguide based dual band duplexer as claimed in any of claims 1 to 5 in circuit design.
10. Use of a microstrip ridge gap waveguide based duplexer in an antenna design according to any of claims 1 to 5.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114335944A (en) * | 2021-12-08 | 2022-04-12 | 网络通信与安全紫金山实验室 | Gap waveguide with band-pass filtering function |
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