CN111244587B - Double-frequency third-order band-pass filter based on microstrip ridge gap waveguide - Google Patents
Double-frequency third-order band-pass filter based on microstrip ridge gap waveguide Download PDFInfo
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- CN111244587B CN111244587B CN202010057364.9A CN202010057364A CN111244587B CN 111244587 B CN111244587 B CN 111244587B CN 202010057364 A CN202010057364 A CN 202010057364A CN 111244587 B CN111244587 B CN 111244587B
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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
- H01P1/201—Filters for transverse electromagnetic waves
- H01P1/203—Strip line filters
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P7/00—Resonators of the waveguide type
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P7/00—Resonators of the waveguide type
- H01P7/08—Strip line resonators
Abstract
The invention belongs to the technical field of microwave devices, and discloses a double-frequency third-order band-pass filter based on microstrip ridge gap waveguides, wherein the upper surface of an upper dielectric plate is a metal floor, metalized through holes are respectively embedded in the two sides and the middle of the dielectric plate, and a grounding coplanar waveguide-microstrip gap waveguide transition structure is loaded on the lower surface; the upper surface of the lower dielectric plate is loaded with a metal ridge, two sides of the metal ridge are loaded with mushroom-shaped EBG structures, the lower surface of the lower dielectric plate is a metal floor, and three microstrip ridge gap waveguide dual-mode resonators are embedded in the metal ridge; 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 and are of a coupling structure. The invention realizes a double-frequency third-order band-pass filter; the double-frequency filter has a compact structure, and the frequencies of the two pass bands are easy to control independently; the dual-frequency band-pass filter based on the microstrip ridge gap waveguide is realized for the first time, so that the application of the microstrip ridge gap waveguide is wider.
Description
Technical Field
The invention belongs to the technical field of microwave devices, and particularly relates to a double-frequency third-order band-pass filter based on a microstrip ridge gap waveguide.
Background
Currently, the closest prior art: the filter is used as a vital device of a communication system, and at present, the implementation modes of the filter mainly comprise a microstrip filter, a SIW filter, a gap waveguide filter and the like; 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 includes ridge gap waveguide, slot gap waveguide, microstrip gap waveguide, etc. in the present invention, microstrip ridge gap waveguide is used. 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. However, the microstrip gap waveguide technology has been proposed recently as a new transmission line, so that the filter design based on the microstrip gap waveguide technology is still few, and only reports of single-frequency microstrip gap waveguide filters are found at present, and under the trend that the communication system develops towards the multi-protocol and multi-band directions, the use of the single-frequency microstrip gap waveguide filters leads to a larger overall volume of the communication system.
In summary, the problems of the prior art are as follows: the existing microstrip gap waveguide filters are single-frequency filters, and the requirement of multi-band operation of a communication system is not met.
The difficulty of solving the technical problems is as follows: how to effectively design a dual-mode resonator based on the microstrip ridge gap waveguide technology, how to design a good feed network for feeding the resonator 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 coupling between the resonators so as to ensure that the performance of the filter is good.
The significance of solving the technical problems is as follows: on the premise of designing a microstrip ridge gap waveguide filter, how to realize multi-band of the filter becomes a crucial problem. At present, no microstrip ridge gap waveguide-based dual-frequency filter is reported in microstrip ridge gap waveguide filter design. The invention provides a dual-frequency third-order filter based on a microstrip ridge gap waveguide, which realizes the multi-frequency of the microstrip ridge gap waveguide filter, meets the requirement of multi-frequency-band work of a communication system and enables the application of the microstrip ridge gap waveguide to be wider.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a double-frequency third-order band-pass filter based on a microstrip ridge gap waveguide.
The invention is realized in this way, a dual-frequency third-order band-pass filter based on microstrip ridge gap waveguide, which 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 a transition structure of grounding coplanar waveguide-microstrip gap waveguide is loaded on the lower surface;
the upper surface of the lower dielectric plate is loaded with a metal ridge, two sides of the metal ridge are loaded with mushroom-shaped EBG structures, the lower surface of the lower dielectric plate is a metal floor, and three micro-strip ridge gap waveguide dual-mode resonators are embedded in the metal ridge;
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 and are of a coupling structure.
Furthermore, the transition structure of the grounding coplanar waveguide and the microstrip gap waveguide is realized by embedding a series of metalized via holes in the upper dielectric slab to ground the coplanar waveguide on the lower surface of the upper dielectric slab.
Furthermore, the coupling structure is composed of two sections of metal ridges loaded between three microstrip ridge gap waveguide dual-mode resonators on the upper surface of the lower dielectric slab.
The invention also aims to provide application of the double-frequency third-order band-pass filter based on the microstrip ridge gap waveguide in microwave devices and gap waveguide technologies.
The invention also aims to provide application of the double-frequency third-order band-pass filter based on the microstrip ridge gap waveguide in circuit design and circuit packaging.
The invention also aims to provide an application of the dual-frequency third-order band-pass filter based on the microstrip ridge gap waveguide in antenna design.
The invention also aims to provide a microstrip ridge gap waveguide dual-mode resonator comprising the double-frequency third-order band-pass filter based on the microstrip ridge gap waveguide, wherein the microstrip ridge gap waveguide dual-mode resonator is composed of two rows of edge metalized through holes and a metal patch which are embedded in the lower dielectric plate in the direction parallel to the Y axis; and a metal floor is arranged at the center of the metal patch, and a metalized through hole is grounded on the upper surface of the upper-layer dielectric plate.
The invention also aims to provide application of the microstrip ridge gap waveguide dual-mode resonator in microwave devices and gap waveguide technologies.
The invention also aims to provide application of the microstrip ridge gap waveguide dual-mode resonator in circuit design and circuit packaging.
The invention also aims to provide application of the microstrip ridge gap waveguide dual-mode resonator in antenna design.
In summary, the advantages and positive effects of the invention are: the embodiment of the invention provides a double-frequency third-order band-pass filter based on a microstrip ridge gap waveguide, which comprises a grounding coplanar waveguide-microstrip gap waveguide transition structure, a microstrip gap waveguide dual-mode resonator and a coupling structure. The transition structure of the grounding coplanar waveguide and the microstrip gap waveguide is realized by embedding a series of metalized through holes in the upper dielectric plate to ground the coplanar waveguide on the lower surface of the upper dielectric plate, the microstrip ridge gap waveguide dual-mode resonator is composed of two rows of edge metalized through holes embedded in the lower dielectric plate in the direction parallel to the Y axis and a metal patch, and the center of the metal patch is provided with a metalized through hole which is grounded to the metal floor on the upper surface of the upper dielectric plate. The transition structure is formed by two sections of metal ridges loaded between three microstrip ridge gap waveguide dual-mode resonators on the upper surface of the lower dielectric plate. The dual-frequency third-order band-pass filter based on the micro-strip ridge gap waveguide adopts the dual-mode resonator, and effectively realizes dual-frequency of the micro-strip ridge gap waveguide.
The invention designs a microstrip ridge gap waveguide dual-mode resonator, which fully utilizes the two-layer dielectric plate structure of the microstrip ridge gap waveguide to respectively generate resonance modes in the two dielectric plates, so that not only are the two resonance frequencies of the dual-mode resonator easy to independently control, but also the dual-frequency third-order band-pass filter of the microstrip ridge gap waveguide has compact size. In the design of the filter, the coupling structure is composed of two sections of metal ridges loaded between three microstrip ridge gap waveguide dual-mode resonators on the upper surface of the lower dielectric plate, so that the coupling strength of the filter is easy to adjust. The invention provides a double-frequency third-order band-pass filter based on a micro-strip ridge gap waveguide for the first time, and the double-frequency of the micro-strip ridge gap waveguide filter is effectively realized. As shown in FIG. 2, the two operating frequency bands (reflection coefficient less than-10 dB) of the embodiment of the present invention are 13.07-13.41GHz and 18.46-18.91GHz respectively, the relative bandwidths are 2.5% and 2.3% respectively, and the insertion loss in the two operating frequency bands is better than 1.7dB and 2.1dB respectively.
Drawings
Fig. 1 is a schematic structural diagram of a dual-frequency third-order band-pass filter based on a microstrip ridge gap waveguide according to an embodiment of the present invention;
in the figure: 1. a first metal floor; 2. an upper dielectric plate; 3. a lower dielectric plate; 4. a second metal floor; 5. a grounded coplanar waveguide; 6. a metal ridge; 7. pasting an EBG structure; 8. a first resonator metal patch; 9. a first resonator edge metalized via; 10. a first resonator center metallized via; 11. a coupling structure; 12. a first resonator; 13. a second resonator; 14. and a third resonator.
Fig. 2 is a simulated S parameter diagram of a dual-band third-order band-pass filter based on a microstrip ridge gap waveguide according to an embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a dual-band first-order band-pass filter of a microstrip ridge gap waveguide dual-mode resonator based on the disclosure of the present invention.
FIG. 4 is a simulation S parameter diagram of a dual-band first-order band-pass filter of a microstrip ridge gap waveguide dual-mode resonator based on the disclosure of the present invention;
in the figure: (a) a simulation S parameter diagram of a microstrip ridge gap waveguide double-frequency first-order band-pass filter with different l; (b) is a simulation S parameter diagram of a microstrip ridge gap waveguide double-frequency first-order band-pass filter with different w.
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-frequency third-order band-pass filter based on a microstrip ridge gap waveguide, and the invention is described in detail with reference to the attached drawings.
As shown in fig. 1, a dual-band third-order band-pass filter based on a microstrip ridge gap waveguide provided in an embodiment of the present invention includes: two layers of dielectric plates: the filter comprises an upper dielectric plate 2, a lower dielectric plate 3, an upper EBG structure patch 7 of a mushroom-type EBG structure which is symmetrical about a metal ridge 6 and loaded on the upper surface of the dielectric plate 3, a coplanar waveguide loaded on the lower surface of the dielectric plate 2 and grounded by embedding a series of metalized through holes in the dielectric plate 2 to realize a grounded coplanar waveguide-microstrip gap waveguide transition structure 5, a resonator consisting of two rows of edge metalized through holes 9 and a metal patch 8 which are embedded in the lower dielectric plate 3 in the direction parallel to the Y axis, a metalized through hole 10 in the center of the metal patch and grounded to a metal floor 1 on the upper surface of the upper dielectric plate, the whole filter is mirror-symmetrical about a dotted line shown in figure 1, and 12 is a first resonator; 13 is a second resonator; and 14 is a third resonator, and two sections of metal ridges are loaded between three microstrip ridge gap waveguide dual- mode resonators 12, 13 and 14 on the upper surface of the lower dielectric plate to form a coupling structure 11.
In the invention, the dielectric plate 2 and the dielectric plate 3 are made of Rogers 5880 material with the relative dielectric constant of 2.2, the loss tangent is only 0.0009, the thickness of the dielectric plate 2 is 0.508mm, the length is 60mm, the width is 20.7mm, the thickness of the dielectric plate 3 is 1.575mm, the length is 37.5 mm, and the width is 20.7 mm. The width of the metal ridge of the microstrip gap waveguide determines the characteristic impedance of the microstrip gap waveguide, and the metal ridge of the microstrip gap waveguide in the embodiment of the invention is 4.5 mm. The size of the resonator metal patch determines the low-frequency resonance frequency of the resonator, the length of the resonator metal patch is 6.4mm, the width of the resonator metal patch is 2.9mm, the width of the tail end of the resonator metal patch is 3.6mm, the length of the coupling structure determines the coupling strength between the resonators, and the length of the coupling structure is 3.6mm and the width of the coupling structure is 4.5 mm. The distance between the two rows of edge metalized through holes of the resonator determines the high-frequency resonant frequency of the resonator, the distance between the two rows of edge metalized through holes of the resonator is 7mm, the size of a metal patch for forming an EBG structure is 2.3mm by 2.3mm, and the diameter of a metal through hole of the EBG structure is 0.4 mm.
The technical effects of the present invention will be described in detail below with reference to the accompanying drawings.
Fig. 2 is a simulated S parameter diagram of a dual-band third-order band-pass filter based on a microstrip ridge gap waveguide according to an embodiment of the present invention. As can be seen from FIG. 2, the two operating frequency bands (reflection coefficient less than-10 dB) of the embodiment of the present invention are 13.07-13.41GHz and 18.46-18.91GHz respectively, the relative bandwidths are 2.5% and 2.3% respectively, and the insertion loss in the two operating frequency bands is better than 1.7dB and 2.1dB respectively. Fig. 3 is a schematic structural diagram of a dual-band first-order band-pass filter of a microstrip ridge gap waveguide dual-mode resonator based on the disclosure of the present invention, where l is a distance between two rows of edge metalized via holes of the resonator, and w is a width of a resonator metal patch terminal. Fig. 4(a) and (b) are simulated S parameter diagrams of a dual-frequency first-order band-pass filter based on the microstrip ridge gap waveguide dual-mode resonator disclosed by the invention under different l and w conditions, respectively. When only l is varied, it can be seen from fig. 4(a) that only the high frequency passband of the dual-frequency filter is shifted. When only w varies, it can be seen from fig. 4(b) that only the low frequency pass band of the dual-band filter shifts. Therefore, as can be seen from fig. 4, the two resonant frequencies of the microstrip ridge gap waveguide dual-mode resonator disclosed by the invention are easy to be independently controlled, and the microstrip ridge gap waveguide dual-mode resonator is suitable for designing a microstrip gap waveguide dual-frequency filter, so that the microstrip gap waveguide is more widely applied.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (1)
1. The utility model provides a double-frenquency third order band-pass filter based on microstrip ridge clearance waveguide which characterized in that, double-frenquency third order band-pass filter based on microstrip ridge clearance waveguide 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 a transition structure of grounding coplanar waveguide-microstrip gap waveguide is loaded on the lower surface;
the upper surface of the lower dielectric plate is loaded with a metal ridge, two sides of the metal ridge are loaded with mushroom-shaped EBG structures, the lower surface of the lower dielectric plate is a metal floor, and three micro-strip ridge gap waveguide dual-mode resonators are embedded in the metal ridge;
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 and are of a coupling structure;
the grounding coplanar waveguide-microstrip gap waveguide transition structure is realized by embedding a series of metalized via holes in the upper dielectric slab to ground the coplanar waveguide on the lower surface of the upper dielectric slab;
the microstrip ridge gap waveguide dual-mode resonator is composed of two rows of edge metalized through holes and a metal patch, wherein the two rows of edge metalized through holes are transversely embedded in the lower dielectric plate and the lower dielectric plate; and a metal floor is arranged at the center of the metal patch, and a metalized through hole is grounded on the upper surface of the upper-layer dielectric plate.
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| CN111799534B (en) * | 2020-06-08 | 2021-06-01 | 南京邮电大学 | Four-order Ka-band-pass filter based on printed ridge gap waveguide |
| CN112186360B (en) * | 2020-10-10 | 2022-07-22 | 江西洪都航空工业集团有限责任公司 | Double-frequency antenna |
| US11870507B2 (en) | 2020-10-23 | 2024-01-09 | Samsung Electronics Co., Ltd. | Wireless board-to-board interconnect for high-rate wireless data transmission |
| CN112563708B (en) * | 2021-02-22 | 2021-06-04 | 成都天锐星通科技有限公司 | Transmission line conversion structure and antenna standing wave test system |
| CN113300062A (en) * | 2021-04-16 | 2021-08-24 | 军事科学院系统工程研究院网络信息研究所 | Dual-band duplexer based on microstrip ridge gap waveguide and application |
| CN114335944B (en) * | 2021-12-08 | 2023-03-24 | 网络通信与安全紫金山实验室 | Gap waveguide with band-pass filtering function |
| CN115020953B (en) * | 2022-06-14 | 2022-12-16 | 华南理工大学 | Millimeter wave back-to-back interlayer transition structure based on microstrip ridge gap waveguide |
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