CN111564683A - Substrate integrated waveguide filter combining one-eighth mode and one-fourth mode - Google Patents
Substrate integrated waveguide filter combining one-eighth mode and one-fourth mode Download PDFInfo
- Publication number
- CN111564683A CN111564683A CN202010598450.0A CN202010598450A CN111564683A CN 111564683 A CN111564683 A CN 111564683A CN 202010598450 A CN202010598450 A CN 202010598450A CN 111564683 A CN111564683 A CN 111564683A
- Authority
- CN
- China
- Prior art keywords
- mode
- integrated waveguide
- substrate integrated
- resonant cavity
- waveguide resonant
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
- H01P1/2088—Integrated in a substrate
Landscapes
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
The invention relates to the technical field of microwave passive devices, in particular to an eighth-mode and quarter-mode combined substrate integrated waveguide filter, which comprises a quarter-mode substrate integrated waveguide resonant cavity and an eighth-mode substrate integrated waveguide resonant cavity, wherein the quarter-mode substrate integrated waveguide resonant cavity and the eighth-mode substrate integrated waveguide resonant cavity respectively comprise a medium substrate, an upper metal layer is arranged on the upper surface of the medium substrate, a lower metal layer is arranged on the lower surface of the medium substrate, and first metal through holes and second metal through holes which are uniformly distributed along the circumferential direction are uniformly distributed in the medium substrate along a coupling window of a cavity. Compared with the traditional substrate integrated waveguide resonant cavity, the invention effectively realizes the miniaturization of the filter, has a single-layer structure, does not need a multilayer structure, is convenient to process, has a simple structure, and has the characteristics of high quality factor and low loss.
Description
Technical Field
The invention relates to the technical field of microwave passive devices, in particular to a substrate integrated waveguide filter combining an eighth mode and a quarter mode.
Background
In recent years, due to rapid development and ripening of communication technology, development and research of microwave and millimeter wave communication devices and systems have attracted more and more attention, wherein research of filters as important components has become more important. In recent years, planar structures which are required to be planarized, miniaturized and integrated are biased to be interconnected with active structures and passive structures, so that systematic hybrid integration is effectively achieved; however, the planar circuit cannot constitute a high quality factor component due to the presence of radiation loss and dielectric loss. Under such circumstances, the advantages of the substrate integrated waveguide technology in the microwave and millimeter wave frequency band have attracted much attention.
The substrate integrated waveguide is very convenient to process, and combines the advantages of the waveguide and the microstrip line, such as high quality factor, small radiation loss, large power capacity, easy integration, low cost and the like, so that the substrate integrated waveguide has wider research and application. To solve the problem that the size is still large at low frequency bands.
Meanwhile, modern wireless communication systems are rapidly developed, and communication spectrum resources face the problem of shortage, so that in order to improve the utilization rate of the spectrum resources, passive devices, particularly radio frequency front-end filters, are required to have better characteristics, and higher requirements are provided for the loss, size, quality factor and processing precision of circuits. However, the filter in the prior art still needs to be improved in terms of miniaturization and high selectivity. And most of the existing substrate integrated waveguide filters are of multilayer structures and have complex structures.
Disclosure of Invention
The invention provides an eighth-mode and quarter-mode combined substrate integrated waveguide filter, which effectively realizes the miniaturization of the filter and has the advantages of simple structure, low power consumption and low loss.
In order to realize the purpose of the invention, the adopted technical scheme is as follows: the substrate integrated waveguide filter combining the eighth mode and the quarter mode comprises a quarter mode substrate integrated waveguide resonant cavity and an eighth mode substrate integrated waveguide resonant cavity, wherein the quarter mode substrate integrated waveguide resonant cavity and the eighth mode substrate integrated waveguide resonant cavity both comprise dielectric substrates, an upper metal layer is arranged on the upper surface of each dielectric substrate, a lower metal layer is arranged on the lower surface of each dielectric substrate, and first metal through holes and second metal through holes which are uniformly distributed along the circumferential direction are uniformly distributed in each dielectric substrate along a coupling window of each cavity.
As an optimization scheme of the invention, the number of the quarter-mode substrate integrated waveguide resonant cavities is one, the number of the eighth-mode substrate integrated waveguide resonant cavities is two, the quarter-mode substrate integrated waveguide resonant cavities are obtained by dividing the substrate integrated waveguide resonant cavities along any two equivalent magnetic walls which are vertical to each other, and the eighth-mode substrate integrated waveguide resonant cavities are obtained by dividing the quarter-mode substrate integrated waveguide resonant cavities along the equivalent magnetic walls of the diagonal lines.
As an optimization scheme of the invention, the length of the side edge of the hypotenuse of the eighth-mode substrate integrated waveguide resonant cavity is larger than that of the quarter-mode substrate integrated waveguide resonant cavity, and the substrate integrated waveguide filter combining the eighth mode and the quarter mode adopts the sequence of the eighth-mode substrate integrated waveguide resonant cavity, the quarter-mode substrate integrated waveguide resonant cavity and the eighth-mode substrate integrated waveguide resonant cavity to be coupled through the coupling window on the equivalent magnetic wall.
As an optimized scheme of the invention, the inner side of the second metal through hole is provided with a slot.
As an optimized scheme of the invention, the two eighth-mode substrate integrated waveguide resonant cavities are a left-side eighth-mode substrate integrated waveguide resonant cavity and a right-side eighth-mode substrate integrated waveguide resonant cavity, the left-side eighth-mode substrate integrated waveguide resonant cavity is provided with an input microstrip line, and the right-side eighth-mode substrate integrated waveguide resonant cavity is provided with an output microstrip line.
As an optimized scheme of the invention, the input microstrip line and the output microstrip line are both 50 ohm feed resistors.
The invention has the positive effects that: 1) compared with the traditional substrate integrated waveguide resonant cavity, the size of the invention is reduced by 83.3%, the miniaturization of the filter is effectively realized, the invention has a single-layer structure, does not need a multilayer structure, can be realized only by a common PCB process, and has convenient processing and simple structure;
2) compared with the traditional microstrip structure, the microstrip structure has the characteristics of high quality factor and low loss.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
FIG. 1 is a schematic diagram of a substrate integrated waveguide resonator according to the present invention;
FIG. 2 is a schematic diagram of a quarter-mode substrate integrated waveguide resonator according to the present invention;
FIG. 3 is a schematic diagram of an eighth-mode substrate integrated waveguide resonator according to the present invention;
FIG. 4 is a schematic view of the overall structure of the present invention;
fig. 5 is a frequency response graph of the present invention.
Wherein: 1. the waveguide resonator comprises a quarter-mode substrate integrated waveguide resonator, 2 and an eighth-mode substrate integrated waveguide resonator, 3 a first metal through hole, 4 a second metal through hole, 5 a substrate integrated waveguide resonator, 6 a coupling window, 7 a slot, 8 an input microstrip line, 9 an output microstrip line, 10 an input port, 11 and an output port.
Detailed Description
As shown in fig. 1-5, the present invention discloses an eighth-mode and quarter-mode combined substrate integrated waveguide filter, which comprises a quarter-mode substrate integrated waveguide resonant cavity 1 and an eighth-mode substrate integrated waveguide resonant cavity 2, wherein each of the quarter-mode substrate integrated waveguide resonant cavity 1 and the eighth-mode substrate integrated waveguide resonant cavity 2 comprises a dielectric substrate, an upper metal layer is disposed on an upper surface of the dielectric substrate, a lower metal layer is disposed on a lower surface of the dielectric substrate, and first metal through holes 3 and second metal through holes 4 are uniformly distributed in the dielectric substrate along a coupling window of the cavity. Wherein the first metal via 3 and the second metal via 4 are used to reduce loss. The dielectric substrate has a relative dielectric constant of 2.2, a dielectric thickness of 0.254, and the overall planar dimensions of the combined eighth mode and quarter mode substrate integrated waveguide filter are 332mm 42.5 mm.
The quarter-mode substrate integrated waveguide resonant cavity 1 is one, and the eighth-mode substrate integrated waveguide resonant cavity 2 is two, as shown in fig. 1-2, the quarter-mode substrate integrated waveguide resonant cavity 1 is obtained by dividing the substrate integrated waveguide resonant cavity 5 along any two mutually perpendicular equivalent magnetic walls. As shown in fig. 3, the eighth-mode substrate integrated waveguide resonator 2 is obtained by dividing the equivalent magnetic wall of the quarter-mode substrate integrated waveguide resonator 1 along the diagonal.
As shown in fig. 4, the length of the bevel edge of the eighth-mode substrate integrated waveguide resonator 2 is greater than the length of the quarter-mode substrate integrated waveguide resonator 1, and the substrate integrated waveguide filter combining the eighth-mode and the quarter-mode filters is coupled by the coupling window 6 on the equivalent magnetic wall in the order of the eighth-mode substrate integrated waveguide resonator 2, the quarter-mode substrate integrated waveguide resonator 1 and the eighth-mode substrate integrated waveguide resonator 2.
The inner side of the third metal through hole 7 is provided with a slot 7. The slot 7 can improve the quality factor and reduce the loss of the filter.
The two eighth-mode substrate integrated waveguide resonant cavities 2 are a left-side eighth-mode substrate integrated waveguide resonant cavity and a right-side eighth-mode substrate integrated waveguide resonant cavity, the left-side eighth-mode substrate integrated waveguide resonant cavity is provided with an input microstrip line 8, and the right-side eighth-mode substrate integrated waveguide resonant cavity is provided with an output microstrip line 9. The end of the input microstrip line 8 is an input port 10, and the end of the output microstrip line 9 is an output port 11.
The input microstrip line 8 and the output microstrip line 9 are both 50 ohm feed resistors.
Signals are input through an input port 10, the resonant cavity loaded with the metal through holes and the slot lines is input from an input microstrip line 8, the filtered signals are transmitted to an output microstrip line 9 through the sequence of the left-side eighth-mode substrate integrated waveguide resonant cavity, the quarter-mode substrate integrated waveguide resonant cavity 1 and the right-side eighth-mode substrate integrated waveguide resonant cavity, and the filtered signals are output through an output port 11.
As shown in fig. 5, the substrate integrated waveguide filter with the combination of the eighth mode and the quarter mode has a center frequency of 3.66GHz, a bandwidth of 320MHz, an insertion loss in the pass band of better than 1.12dB, and a return loss in the pass band of better than 20 dB.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. The integrated waveguide filter of substrate of one-eighth mode and one-fourth mode combination, characterized by: the waveguide resonant cavity comprises a quarter-mode substrate integrated waveguide resonant cavity (1) and an eighth-mode substrate integrated waveguide resonant cavity (2), wherein the quarter-mode substrate integrated waveguide resonant cavity (1) and the eighth-mode substrate integrated waveguide resonant cavity (2) both comprise dielectric substrates, an upper metal layer is arranged on the upper surface of each dielectric substrate, a lower metal layer is arranged on the lower surface of each dielectric substrate, and first metal through holes (3) and second metal through holes (4) which are uniformly distributed along the circumferential direction are uniformly distributed in each dielectric substrate along a coupling window of a cavity.
2. A combined eighth-mode and quarter-mode substrate integrated waveguide filter according to claim 1, wherein: the quarter-mode substrate integrated waveguide resonant cavity is characterized in that one quarter-mode substrate integrated waveguide resonant cavity (1) is provided, two eighth-mode substrate integrated waveguide resonant cavities (2) are provided, the quarter-mode substrate integrated waveguide resonant cavity (1) is obtained by dividing the substrate integrated waveguide resonant cavity (5) along any two mutually perpendicular equivalent magnetic walls, and the eighth-mode substrate integrated waveguide resonant cavity (2) is obtained by dividing the quarter-mode substrate integrated waveguide resonant cavity (1) along the diagonal equivalent magnetic walls.
3. A combined eighth-mode and quarter-mode substrate integrated waveguide filter according to claim 2, wherein: the length of the side edge of the one-eighth-mode substrate integrated waveguide resonant cavity (2) is greater than that of the one-fourth-mode substrate integrated waveguide resonant cavity (1), and the substrate integrated waveguide filter combining the one-eighth mode and the one-fourth mode adopts the order of the one-eighth-mode substrate integrated waveguide resonant cavity (2), the one-fourth-mode substrate integrated waveguide resonant cavity (1) and the one-eighth-mode substrate integrated waveguide resonant cavity (2) to be coupled through a coupling window (6) on an equivalent magnetic wall.
4. A combined eighth-mode and quarter-mode substrate integrated waveguide filter according to claim 3, wherein: the inner side of the second metal through hole (4) is provided with a slot (7).
5. A combined eighth-mode and quarter-mode substrate integrated waveguide filter according to claim 4, wherein: the two eighth-mode substrate integrated waveguide resonant cavities (2) are a left-side eighth-mode substrate integrated waveguide resonant cavity and a right-side eighth-mode substrate integrated waveguide resonant cavity, the left-side eighth-mode substrate integrated waveguide resonant cavity is provided with an input microstrip line (8), and the right-side eighth-mode substrate integrated waveguide resonant cavity is provided with an output microstrip line (9).
6. A combined eighth-mode and quarter-mode substrate integrated waveguide filter according to claim 5, wherein: the input microstrip line (8) and the output microstrip line (9) are both 50 ohm feed resistors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010598450.0A CN111564683A (en) | 2020-06-28 | 2020-06-28 | Substrate integrated waveguide filter combining one-eighth mode and one-fourth mode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010598450.0A CN111564683A (en) | 2020-06-28 | 2020-06-28 | Substrate integrated waveguide filter combining one-eighth mode and one-fourth mode |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111564683A true CN111564683A (en) | 2020-08-21 |
Family
ID=72072741
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010598450.0A Pending CN111564683A (en) | 2020-06-28 | 2020-06-28 | Substrate integrated waveguide filter combining one-eighth mode and one-fourth mode |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111564683A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114335943A (en) * | 2021-11-30 | 2022-04-12 | 南京邮电大学 | High-selectivity band-pass filter based on hybrid folded substrate integrated waveguide resonant cavity |
-
2020
- 2020-06-28 CN CN202010598450.0A patent/CN111564683A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114335943A (en) * | 2021-11-30 | 2022-04-12 | 南京邮电大学 | High-selectivity band-pass filter based on hybrid folded substrate integrated waveguide resonant cavity |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109462000B (en) | Multi-layer substrate integrated waveguide third-order filtering power divider | |
| CN106785290B (en) | Filtering power divider based on quarter-mode substrate integrated waveguide circular cavity | |
| CN106602190A (en) | Multilayer substrate integration waveguide filter with high out-of-band rejection | |
| CN110797614B (en) | Miniaturized substrate integrated waveguide filter with high-order mode suppression | |
| CN108539338B (en) | A kind of a quarter mould substrate integral wave guide filter based on notching construction | |
| CN105655673B (en) | A kind of coated by dielectric half module substrate integrated wave guide bandpass filter | |
| CN111276781B (en) | High-order mode substrate integrated waveguide circular cavity filter based on through hole disturbance | |
| WO2024087509A1 (en) | High-order mode substrate integrated waveguide dual-passband circular cavity filter | |
| CN114284673B (en) | Substrate integrated waveguide dual-band filtering balun | |
| CN111564683A (en) | Substrate integrated waveguide filter combining one-eighth mode and one-fourth mode | |
| CN111403861B (en) | UIR loaded three-order dual-passband substrate integrated waveguide filter | |
| CN115117581B (en) | Filtering power divider with high unloaded Q value based on 3D printing | |
| CN111293390A (en) | UIR loaded three-order dual-passband substrate integrated waveguide filter | |
| CN212033198U (en) | Substrate integrated waveguide filter combining one-eighth mode and one-fourth mode | |
| CN113851845B (en) | Integrated filtering duplex antenna for inhibiting in-band signals | |
| CN212725534U (en) | Miniaturized SIW resonant cavity and wide-stop-band SIW filter formed by same | |
| CN112002974B (en) | Miniaturized SIW resonant cavity and wide-stop-band SIW filter formed by same | |
| CN111697321B (en) | Filter antenna based on half-mode substrate integrated waveguide structure | |
| CN115064851A (en) | Rectangular cavity and round cavity multimode coupled substrate integrated waveguide duplexer | |
| CN114937868A (en) | Millimeter wave substrate integrated medium filter antenna with integrated waveguide feed | |
| CN209747694U (en) | Low-pass filter with complementary split resonant ring and U-shaped groove defected ground | |
| CN209913004U (en) | Wide stop band microwave filter based on coplanar waveguide | |
| CN110994094A (en) | Differential three-passband filter for loading UIR based on T-branch node | |
| CN114267928B (en) | W-waveband waveguide band-pass filter | |
| CN116722342B (en) | Millimeter wave filtering super-surface antenna module and communication equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |