CN203085714U - Substrate integrated waveguide filter with direct coupling between source and load - Google Patents
Substrate integrated waveguide filter with direct coupling between source and load Download PDFInfo
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- CN203085714U CN203085714U CN 201320087823 CN201320087823U CN203085714U CN 203085714 U CN203085714 U CN 203085714U CN 201320087823 CN201320087823 CN 201320087823 CN 201320087823 U CN201320087823 U CN 201320087823U CN 203085714 U CN203085714 U CN 203085714U
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Abstract
The utility model discloses a substrate integrated waveguide filter with direct coupling between source and load. The substrate integrated waveguide filter comprises a medium substrate, an upper surface metal layer, a lower surface metal layer and a metalized through hole, wherein the metalized through hole, the upper surface metal layer and the lower surface metal layer form two substrate integrated waveguide cavities and two substrate integrated waveguide transmission lines on the medium substrate; four metal post inductive windows are arranged between the two substrate integrated waveguide cavities, between the substrate integrated waveguide cavities and the substrate integrated waveguide transmission lines, and between the two substrate integrated waveguide transmission lines; and two ends of the two substrate integrated waveguide transmission lines are respectively provided with coplanar waveguide input ends and coplanar waveguide output ends. The substrate integrated waveguide filter adopts a substrate integrated waveguide technology and has the advantages of single-layer structure, small size and high integration level. The substrate integrated waveguide filter utilizes the direct coupling between source and load to generate two transmission zeros, and the good selectivity is realized. The stopband suppression performance is good, the insertion loss is small, the performance is good, and the design is convenient.
Description
Technical field
The utility model relates to a kind of substrate integral wave guide filter, particularly the direct-coupled substrate integral wave guide filter of a provenance and load.
Background technology
Filter is one of important basic element circuit of Circuits System, and its performance is all influential to the selectivity of entire system, noise factor, sensitivity, gain etc.Traditional microwave filter adopts little band or waveguiding structure usually, but the shortcoming that they respectively have some to be difficult to overcome.For the flat filter that adopts microstrip line construction, it is little that they have a volume, process advantages such as simple, but exist power capacity low, and loss is big, because of shortcomings such as the inconvenient sealings of structure opening, thereby is applicable to the Circuits System that power is little; Filter based on metal waveguide has the power capacity height, and loss is low, advantages such as excellent performance, but its processing cost height, and be not suitable for modern planar circuit integrated; Substrate integration wave-guide (SIW) combines both advantages to a certain extent, keeping the conventional filter high power capacity, in the time of the low-loss advantage, also having kept the general closed planar line filter is easy to integrated, lightweight, be easy to advantage such as processing, the substrate integrated waveguide technology filter can realize that processing cost is low with common PCB technology, fabrication cycle is short, and its principle realizes with metallized periodicity through hole alternative metals wall.But because frequency spectrum resource is limited, Modern Communication System has proposed more and more higher requirement to the selectivity of filter, and method commonly used is that the cross-couplings by a plurality of independently resonant cavitys produces transmission zero, and this method design is complicated, the filter volume is also bigger, can not satisfy people's requirement.
Summary of the invention
It is a kind of simple in structure that the purpose of this utility model just is to provide, and volume is less, and consume little source and the direct-coupled substrate integral wave guide filter of load, can effectively solve the problem of above-mentioned existence.
To achieve these goals, the technical solution adopted in the utility model is such: the direct-coupled substrate integral wave guide filter of source of the present utility model and load, comprise dielectric substrate, on the dielectric substrate, lower surface is laid with upper surface metal level and lower surface metal layer respectively, also be provided with the plated-through hole that runs through upper surface metal level and lower surface metal layer on the dielectric substrate, it is characterized in that: described plated-through hole, upper surface metal level and lower surface metal layer form two substrate integrated wave-guide cavity waves and two segment base sheet integrated waveguide transmission lines on dielectric substrate, be provided with first metal column perception window between two substrate integrated wave-guide cavity waves, be provided with second metal column perception window between first substrate integrated wave-guide cavity wave and the first substrate integration wave-guide transmission line, be provided with the 3rd metal column perception window between second substrate integrated wave-guide cavity wave and the second substrate integration wave-guide transmission line, be provided with the 4th metal column perception window between the two segment base sheet integrated waveguide transmission lines, the two ends of two segment base sheet integrated waveguide transmission lines are respectively equipped with co-planar waveguide input and co-planar waveguide output.。
As preferably, the diameter of described plated-through hole is 0.5 mm, and the spacing between adjacent through-holes is 1 mm.
As preferably, described dielectric substrate adopts ROGERS 5880, and thickness is 0.5mm, and dielectric constant is 2.2.
Compared with prior art, advantage of the present utility model is: one, this filter has less Insertion Loss, the direct coupled wave theory of employing source and load, only use two cavitys just to realize two transmission zeros, and traditional cross-couplings filter is realized same four cavitys of performance need, thereby littler volume being arranged than traditional filter, littler loss is fit to be applied to microwave and millimeter wave field very much; Two, this filter can produce two transmission zeros, has good selectivity, has also improved the attenuation outside a channel characteristic preferably; Three, this filter adopts the single substrate integrated wave guide structure, make very simple, all utilize ripe standard industry technology, low and the precision height of cost, produce in batches easily, enclosed construction thereby radiation are little, and isolation and antijamming capability are strong, integrated with active planar circuit easily, this is a very big advantage for the metal waveguide filter.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is the schematic cross-section of Fig. 1;
Fig. 3 is transmission characteristic figure of the present utility model.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing.
Referring to Fig. 1 and Fig. 2, the direct-coupled substrate integral wave guide filter of source of the present utility model and load, comprise dielectric substrate 1, on the dielectric substrate 1, lower surface is laid with upper surface metal level 7 and lower surface metal layer 8 respectively, also be provided with the plated-through hole 2 that runs through upper surface metal level 7 and lower surface metal layer 8 on the dielectric substrate 1, described plated-through hole 2, upper surface metal level 7 and lower surface metal layer 8 form two substrate integrated wave-guide cavity waves 31 on dielectric substrate 1,32 and two segment base sheet integrated waveguide transmission lines 41,42, adopt public side between adjacent substrate integrated wave-guide cavity wave and the substrate integration wave-guide transmission line, two substrate integrated wave-guide cavity waves 31, be provided with first metal column perception window 51 between 32, be provided with second metal column perception window 52 between first substrate integrated wave-guide cavity wave 31 and the first substrate integration wave-guide transmission line 41, be provided with the 3rd metal column perception window 53 between second substrate integrated wave-guide cavity wave 32 and the second substrate integration wave-guide transmission line 42, two segment base sheet integrated waveguide transmission lines 41, be provided with the 4th metal column perception window 54 between 42, two segment base sheet integrated waveguide transmission lines 41,42 two ends are respectively equipped with co-planar waveguide input 61 and co-planar waveguide output 62, the diameter of described plated-through hole 2 is 0.5 mm, spacing between adjacent through-holes is 1 mm, described dielectric substrate 1 adopts ROGERS 5880, thickness is 0.5mm, and dielectric constant is 2.2.
This filter uses TE
201And TE
101The pattern substrate integrated wave-guide cavity wave is realized electricity, magnetic coupling, and to produce required transmission zero, substrate integrated wave- guide cavity wave 31,32 is respectively TE
201And TE
101The pattern cavity.Utilize two substrate integrated wave- guide cavity waves 31,32 to realize the coupling of energy by first metal column perception window 51, two substrate integrated wave- guide cavity waves 31,32 are realized the energy coupling with two segment base sheet integrated waveguide transmission lines 41,42 by second metal column perception window 52 and the 3rd metal column perception window 53 respectively, 41,42 representative source and the loads of two segment base sheet integrated waveguide transmission lines, they directly are coupled by the 4th metal column perception window 54 realization sources and load; And the co-planar waveguide input 61 that is provided with on the two segment base sheet integrated waveguide transmission lines 41,42 is connected with external circuit by 50 ohm microstrip with co-planar waveguide output 62; By regulating the size of the 4th metal column perception window 54, just can directly change the power of source and load coupling, to improve the performance of filter.
In the present embodiment, the transmission characteristic of filter emulation and actual measurement as shown in Figure 3, as we can see from the figure, actual measurement return loss is better than-17.5dB, and Insertion Loss is approximately 3dB in the band, and this loss is to have comprised test splice, the influence of microstrip feed line and co-planar waveguide, these losses are apparent in view at the Ku wave band, deduct this part loss, and the loss meeting of filter is littler.Test is very identical with simulation result, and lower sideband on filter can be found two transmission zeros clearly, has improved the selectivity of filter well, and two limits are arranged in the band, makes the passband of filter be tending towards smooth.
Protection range of the present utility model is not limited to the statement and the embodiment of present specification, and every various possible being equal to of making according to foregoing description replaced or changed, and all is considered to belong to the protection range that power example of the present utility model requires.
Claims (3)
1. the direct-coupled substrate integral wave guide filter of a provenance and load, comprise dielectric substrate, on the dielectric substrate, lower surface is laid with upper surface metal level and lower surface metal layer respectively, also be provided with the plated-through hole that runs through upper surface metal level and lower surface metal layer on the dielectric substrate, it is characterized in that: described plated-through hole, upper surface metal level and lower surface metal layer form two substrate integrated wave-guide cavity waves and two segment base sheet integrated waveguide transmission lines on dielectric substrate, be provided with first metal column perception window between two substrate integrated wave-guide cavity waves, be provided with second metal column perception window between first substrate integrated wave-guide cavity wave and the first substrate integration wave-guide transmission line, be provided with the 3rd metal column perception window between second substrate integrated wave-guide cavity wave and the second substrate integration wave-guide transmission line, be provided with the 4th metal column perception window between the two segment base sheet integrated waveguide transmission lines, the two ends of two segment base sheet integrated waveguide transmission lines are respectively equipped with co-planar waveguide input and co-planar waveguide output.
2. source according to claim 1 and the direct-coupled substrate integral wave guide filter of load, it is characterized in that: the diameter of described plated-through hole is 0.5 mm, the spacing between adjacent through-holes is 1 mm.
3. source according to claim 1 and the direct-coupled substrate integral wave guide filter of load is characterized in that: described dielectric substrate adopts ROGERS 5880, and thickness is 0.5mm, and dielectric constant is 2.2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320087823 CN203085714U (en) | 2013-02-27 | 2013-02-27 | Substrate integrated waveguide filter with direct coupling between source and load |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320087823 CN203085714U (en) | 2013-02-27 | 2013-02-27 | Substrate integrated waveguide filter with direct coupling between source and load |
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| CN203085714U true CN203085714U (en) | 2013-07-24 |
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| CN 201320087823 Expired - Fee Related CN203085714U (en) | 2013-02-27 | 2013-02-27 | Substrate integrated waveguide filter with direct coupling between source and load |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105896008A (en) * | 2016-04-27 | 2016-08-24 | 南京邮电大学 | Compact-type band-pass filter comprising transmission zero points at high and low frequencies |
| CN107134609A (en) * | 2016-02-26 | 2017-09-05 | 株式会社藤仓 | The design method of wave filter and the wave filter |
| CN108987924A (en) * | 2018-07-16 | 2018-12-11 | 西安电子科技大学 | Substrate integration wave-guide bimodulus filter antenna with more radiation zeros |
-
2013
- 2013-02-27 CN CN 201320087823 patent/CN203085714U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107134609A (en) * | 2016-02-26 | 2017-09-05 | 株式会社藤仓 | The design method of wave filter and the wave filter |
| CN105896008A (en) * | 2016-04-27 | 2016-08-24 | 南京邮电大学 | Compact-type band-pass filter comprising transmission zero points at high and low frequencies |
| CN108987924A (en) * | 2018-07-16 | 2018-12-11 | 西安电子科技大学 | Substrate integration wave-guide bimodulus filter antenna with more radiation zeros |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130724 Termination date: 20140227 |