CN109560356A - A kind of double frequency filter - Google Patents
A kind of double frequency filter Download PDFInfo
- Publication number
- CN109560356A CN109560356A CN201811397260.1A CN201811397260A CN109560356A CN 109560356 A CN109560356 A CN 109560356A CN 201811397260 A CN201811397260 A CN 201811397260A CN 109560356 A CN109560356 A CN 109560356A
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- CN
- China
- Prior art keywords
- metal
- frequency filter
- double frequency
- line
- rabbet joint
- 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.)
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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
-
- 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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- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
The invention belongs to technical field of electronic components, provide a kind of double frequency filter, which includes co-planar waveguide and Metal cavity, and the Metal cavity is embedded with one piece of metal plate, offers the line of rabbet joint on the metal plate；The metal plate passes through the center conductor band connection on metal patch and the co-planar waveguide；Medium is filled with inside the Metal cavity.Double frequency filter provided by the invention can be by adjusting the position of the thickness of metal plate and dielectric layer, length, width and the line of rabbet joint, significantly improve the separating effect of a variety of oscillation modes in Metal cavity, oscillation mode is assigned to different frequency passbands, by the length for controlling the line of rabbet joint, transmission zero can be generated between two frequency passbands, form the preferable double frequency filter of isolation effect.
Description
Technical field
The invention belongs to technical field of electronic components more particularly to a kind of double frequency filters.
Background technique
Microwave filter is a kind of device for selecting different frequency microwave signal, it is by inhibiting unwanted frequency
Signal prevents it from by filter, and the frequency signal of needs is only allowed to pass through, and has certain frequency-selecting, in communication system
In receiving end and transmitting terminal play an important role.With the development of wireless communication technique, the frequency band between signal is more and more narrow,
Just to the specification of filter and reliability, more stringent requirements are proposed for this.Double frequency filter is had existed in the prior art, it can be same
When work two different frequency ranges in wireless communications.But current double frequency filter on the market, due to two frequency passbands
Isolation effect it is poor so that the performance of double frequency filter is also poor.
Summary of the invention
The technical problem to be solved by the embodiment of the invention is that providing a kind of double frequency filter, it is intended to solve the prior art
In the bad problem of two frequency passband isolation effects of double frequency filter.
The embodiments of the present invention are implemented as follows, provides a kind of double frequency filter comprising co-planar waveguide and metal resonance
Chamber, the Metal cavity are embedded with one piece of metal plate, offer the line of rabbet joint on the metal plate；The metal plate is pasted by metal
Center conductor band connection on piece and the co-planar waveguide；Medium is filled with inside the Metal cavity.
Further, the setting of former and later two end faces of the Metal cavity is jagged, and the metal plate is in the indentation, there
Pass through the center conductor band connection on metal patch and the co-planar waveguide.
Further, four angles of the metal plate cut out the cuboid of a same size, form " ten " word
Structure.
Further, the metal plate is parallel with the co-planar waveguide.
Further, the connection type of the metal patch and the metal plate and the center conductor band is specially to weld
It connects.
Further, the metal patch and the center conductor band is of same size.
Further, stating metal patch is rectangle.
Further, the line of rabbet joint includes at least one the first line of rabbet joint and at least one the second line of rabbet joint, first line of rabbet joint
Along the metal sheet outer surface circumferentially around second line of rabbet joint is directed around along the metal plate length or width.
Further, the quantity of first line of rabbet joint is one, and the quantity of second line of rabbet joint is two.
Further, the medium is microwave ceramics.
Compared with prior art, beneficial effect is the embodiment of the present invention: the present invention embeds one block of gold in Metal cavity
Belong to plate, opens up the line of rabbet joint on a metal plate, and the setting of former and later two end faces of Metal cavity is jagged, metal plate is logical in indentation, there
The sky that metal patch is crossed with the center conductor band connection on co-planar waveguide to feed, inside Metal cavity except metallic plate
Between use media filler, by adjusting the position of the thickness of metal plate and dielectric layer, length, width and the line of rabbet joint, can significantly mention
Oscillation mode, is assigned to different frequency passbands by the separating effect of a variety of oscillation modes in high metal resonant cavity, passes through control
The length of the line of rabbet joint can generate transmission zero between two frequency passbands, form the preferable double frequency filter of isolation effect.
Detailed description of the invention
Fig. 1 is double frequency filter overall structure diagram provided in an embodiment of the present invention；
Fig. 2 is the overlooking structure diagram of double frequency filter shown in FIG. 1；
Fig. 3 is the corresponding Electromagnetic Simulation curve graph of double frequency filter frequency shown in FIG. 1.
In the accompanying drawings, each appended drawing reference indicates:
1, Metal cavity；2, the line of rabbet joint；3, co-planar waveguide；4, metal plate；5, metal patch；6, center conductor band；7, it is situated between
Matter.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
It as shown in Figure 1 to Figure 2, is a kind of double frequency filter provided in an embodiment of the present invention, which includes altogether
Surface wave leads 3 and Metal cavity 1, and Metal cavity 1 is embedded with one piece of metal plate 4, offers the line of rabbet joint 2 on metal plate 4；Metal plate
4 are connect by metal patch 5 with the center conductor band 6 on co-planar waveguide 3；Medium 7 is filled with inside Metal cavity 1.Pass through
The position for adjusting the thickness of metal plate 4 and medium 7, length, width and the line of rabbet joint 2, significantly improves a variety of in Metal cavity 1
Oscillation mode is assigned to different frequency passbands by the separating effect of oscillation mode, can be two by controlling the length of the line of rabbet joint 2
Transmission zero is generated between a frequency passband, forms the preferable double frequency filter of isolation effect.In addition, medium 7 is microwave
Ceramics.Optionally, medium 7 is also possible to other dielectric materials for microwave, and the present embodiment is not limited in this respect.
In above-described embodiment, metal plate 4 is parallel with co-planar waveguide 3, and four angles of metal plate 4 open up a same size
Cuboid gap, constitute " ten " word structure.By adjusting the size of the small cuboid gap on metal plate 4, Ke Yiti
The performance of high filter.
In above-described embodiment, the connection type specially welding of metal patch 5 and metal plate 4 and center conductor band 6.Gold
Category patch 5 is rectangular metal patch, by 5 both ends of the rectangular metal patch center conductor band with metal plate 4 and co-planar waveguide 3 respectively
6 weld together, and can be used for feeding.In addition, as shown in Fig. 2, the width of the width of rectangular metal patch 5 and center conductor band 6
It is identical.
In addition, as shown in Fig. 2, the line of rabbet joint 2 includes at least one the first line of rabbet joint and at least one the second line of rabbet joint, the first line of rabbet joint edge
4 outer surface of metal plate is circumferentially around second line of rabbet joint is directed around along the length or width of metal plate 4.Optionally, first line of rabbet joint
Quantity is one, and the quantity of second line of rabbet joint is two.
As shown in figure 3, analogous diagram illustrates that mentioned filter construction can generate 2 transmission zeros, it is located at two filtering
Position between adjacent frequency bands has preferable double frequency filter effect.
In conclusion the present invention embeds one piece of metal plate 4 in Metal cavity 1, the line of rabbet joint 2 is opened up on metal plate 4, and
The setting of former and later two end faces of Metal cavity 1 is jagged, and metal plate 4 passes through on metal patch 5 and co-planar waveguide 3 in indentation, there
Center conductor band 6 connects the space to feed, except 1 inside metallic plate 4 of Metal cavity and is filled with medium 7, passes through tune
The position for saving the thickness of metal plate 4 and medium 7, length, width and the line of rabbet joint 2, significantly improves a variety of vibrations in Metal cavity 1
Oscillation mode is assigned to different frequency passbands by the separating effect for swinging mode, can be at two by controlling the length of the line of rabbet joint 2
Transmission zero is generated between frequency passband, forms the preferable double frequency filter of isolation effect.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (10)
1. a kind of double frequency filter, which is characterized in that including co-planar waveguide and Metal cavity, the Metal cavity is embedded with
One piece of metal plate offers the line of rabbet joint on the metal plate；The metal plate passes through on metal patch and the co-planar waveguide
Heart conductor band connection；Medium is filled with inside the Metal cavity.
2. double frequency filter as described in claim 1, which is characterized in that former and later two end faces of the Metal cavity are provided with
Notch, the metal plate pass through the center conductor band connection on metal patch and the co-planar waveguide in indentation, there.
3. double frequency filter as described in claim 1, which is characterized in that four angles of the metal plate offer one big
Small identical cuboid gap constitutes " ten " word structure.
4. double frequency filter as claimed in claim 3, which is characterized in that the metal plate is parallel with the co-planar waveguide.
5. the double frequency filter as described in any one of Claims 1-4, which is characterized in that the metal patch with it is described
The connection type of metal plate and the center conductor band is welding.
6. the double frequency filter as described in any one of Claims 1-4, which is characterized in that the metal patch with it is described
Center conductor band it is of same size.
7. the double frequency filter as described in any one of Claims 1-4, which is characterized in that the metal patch is rectangle.
8. double frequency filter as described in claim 1, which is characterized in that the line of rabbet joint includes at least one the first line of rabbet joint and extremely
Few second line of rabbet joint, first line of rabbet joint is along the metal sheet outer surface circumferentially around second line of rabbet joint is along the metal
Plate length or width is directed around.
9. double frequency filter as claimed in claim 8, which is characterized in that the quantity of first line of rabbet joint is one, described the
The quantity of two line of rabbet joint is two.
10. double frequency filter as described in claim 1, which is characterized in that the medium is microwave ceramics.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811397260.1A CN109560356B (en) | 2018-11-22 | 2018-11-22 | Double-frequency filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811397260.1A CN109560356B (en) | 2018-11-22 | 2018-11-22 | Double-frequency filter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109560356A true CN109560356A (en) | 2019-04-02 |
| CN109560356B CN109560356B (en) | 2020-08-18 |
Family
ID=65866935
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811397260.1A Active CN109560356B (en) | 2018-11-22 | 2018-11-22 | Double-frequency filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109560356B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112186315A (en) * | 2020-09-28 | 2021-01-05 | 努比亚技术有限公司 | Double-frequency filter and mobile terminal |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1697249A (en) * | 2005-06-01 | 2005-11-16 | 东南大学 | Wave-guide integrated on substrate-band-pass filter of coplanar wave-guide |
| CN105428765A (en) * | 2015-12-21 | 2016-03-23 | 华南理工大学 | Metal resonant cavity filter embedded with slotted metal plate with low-frequency zero point |
| CN205452493U (en) * | 2016-03-07 | 2016-08-10 | 南京邮电大学 | Coplane waveguide bandpass filter based on novel split ring resonator structure |
| CN106486726A (en) * | 2016-08-03 | 2017-03-08 | 华南理工大学 | The Metal cavity wave filter of embedded H type bonding jumper |
| CN106654539A (en) * | 2017-01-18 | 2017-05-10 | 华南理工大学 | Filtering antenna based on metal integrated structure |
| CN106684512A (en) * | 2017-01-18 | 2017-05-17 | 华南理工大学 | Duplexing antenna based on metal integrated structure |
-
2018
- 2018-11-22 CN CN201811397260.1A patent/CN109560356B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1697249A (en) * | 2005-06-01 | 2005-11-16 | 东南大学 | Wave-guide integrated on substrate-band-pass filter of coplanar wave-guide |
| CN105428765A (en) * | 2015-12-21 | 2016-03-23 | 华南理工大学 | Metal resonant cavity filter embedded with slotted metal plate with low-frequency zero point |
| CN205452493U (en) * | 2016-03-07 | 2016-08-10 | 南京邮电大学 | Coplane waveguide bandpass filter based on novel split ring resonator structure |
| CN106486726A (en) * | 2016-08-03 | 2017-03-08 | 华南理工大学 | The Metal cavity wave filter of embedded H type bonding jumper |
| CN106654539A (en) * | 2017-01-18 | 2017-05-10 | 华南理工大学 | Filtering antenna based on metal integrated structure |
| CN106684512A (en) * | 2017-01-18 | 2017-05-17 | 华南理工大学 | Duplexing antenna based on metal integrated structure |
Non-Patent Citations (1)
| Title |
|---|
| BING-LONG ZHENG 等: "Multi-Mode Bandpass Cavity Filters and Duplexer With Slot Mixed-Coupling Structure", 《IEEE ACCESS》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112186315A (en) * | 2020-09-28 | 2021-01-05 | 努比亚技术有限公司 | Double-frequency filter and mobile terminal |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109560356B (en) | 2020-08-18 |
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