CN204516875U - Based on the coplanar waveguide ultra wide band band pass filter of pbg structure - Google Patents
Based on the coplanar waveguide ultra wide band band pass filter of pbg structure Download PDFInfo
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- CN204516875U CN204516875U CN201520248496.4U CN201520248496U CN204516875U CN 204516875 U CN204516875 U CN 204516875U CN 201520248496 U CN201520248496 U CN 201520248496U CN 204516875 U CN204516875 U CN 204516875U
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Abstract
The utility model discloses the coplanar waveguide ultra wide band band pass filter based on pbg structure, comprise medium substrate, in the middle of one of them surface of medium substrate, print is covered with metal center conduction band, metal center conduction band both sides print is covered with metal ground plate, and on the metal ground plate of both sides respectively symmetry be etched with pbg structure and form pbg structure ground plate, there is gap between pbg structure ground plate and metal center conduction band, and be positioned at same plane; The centre of metal center conduction band and along the Width of metal center conduction band having the multiple cracks be positioned on straight line, be etched with the rectangle finger perpendicular to crack place straight line between adjacent crack, and adjacent rectangle finger is directed in opposite directions, submission finger-like.Classical pbg structure is directly used as the ground connection of the both sides of co-planar waveguide center conduction band simultaneously in conjunction with interdigital coupled structure by the utility model, and achieving ultra wide band bandpass filter, is the examples of many successful that co-planar waveguide is combined with pbg structure and interdigital coupled structure.
Description
Technical field
The utility model relates to a kind of coplanar waveguide ultra wide band band pass filter based on pbg structure, belongs to microwave technical field.
Background technology
Along with the fast development of the Technology of Ultra and the raising day by day of microwave device integrated level, develop the focus that microwave monolithic integrated circuit (MMIC) becomes microwave regime energetically.
Pbg structure constructs periodic disturbance in certain specific medium, make the frequency selectivity that it reveals at specific band table, be widely used in planar circuit, this frequency selectivity of pbg structure own makes it not only very naturally be applied in Design of microwave filters just, and widely applies in Antenna Design as frequency selectivity plane.At present, there is a lot of publication to describe microwave filter based on pbg structure, but wherein realize all on the microstrip line greatly.In recent years, researchers have recognized co-planar waveguide (CPW) advantage in property research cycle loaded transmission line, propagate and ground connection because only need single metal level just can realize signal simultaneously, be easy to integrated and coupling loss between adjacent signals line between less, the circuit of crosstalk is less.Meanwhile, interdigital coupled structure can realize broad passband close coupling.It should be noted that, classical pbg structure was once applied in for suppressing energy emission loss on ground plate that back is covered with the co-planar waveguide (CBCPW) of metallic conductor, but the ground connection classical pbg structure not directly being used as the both sides of co-planar waveguide center conduction band realizes the precedent of ultra wide band bandpass filter simultaneously in conjunction with interdigital coupled structure.
Utility model content
Technical problem to be solved in the utility model is: provide a kind of coplanar waveguide ultra wide band band pass filter based on pbg structure, ground connection pbg structure being directly used as the both sides of co-planar waveguide center conduction band, simultaneously in conjunction with interdigital coupled structure, achieves ultra wide band bandpass filter.
The utility model is for solving the problems of the technologies described above by the following technical solutions:
Based on the coplanar waveguide ultra wide band band pass filter of pbg structure, comprise medium substrate, in the middle of described one of them surface of medium substrate, print is covered with metal center conduction band, the two ends of this metal center conduction band are extended down to the edge of medium substrate a pair opposite side respectively, and metal center conduction band is perpendicular to a pair opposite side of aforementioned medium substrate; Described metal center conduction band both sides print is covered with metal ground plate, and on the metal ground plate of both sides respectively symmetry be etched with pbg structure and form pbg structure ground plate, there is gap between pbg structure ground plate and metal center conduction band, and be positioned at same plane; The centre of described metal center conduction band and along the Width of metal center conduction band having the multiple cracks be positioned on straight line, the rectangle finger perpendicular to crack place straight line is etched with between adjacent crack, and adjacent rectangle finger is directed in opposite directions, submission finger-like; Described pbg structure ground plate is the ground plate cell array of the capable n row of m, m, n are positive integer, described ground plate unit comprises middle square sheet metal, four angles of middle square sheet metal are respectively equipped with the identical square metal sheet of size, the square sheet metal of each square metal sheet and centre has lap, and identical square sized by this lap, the centre at four edges of middle square sheet metal is also etched with outward extending rectangle detail; Adjacently connected by rectangle detail between Slab element.
Preferably, the size of described rectangle finger is all identical.
Preferably, the number of described rectangle finger is 5.
Preferably, the degree of depth of described rectangle finger is 1.3mm.
Preferably, described medium substrate is Rogers6010 dielectric-slab.
Preferably, the shape of described medium substrate is rectangle.
The utility model adopts above technical scheme compared with prior art, has following technique effect:
1, the utility model is based on the coplanar waveguide ultra wide band band pass filter of pbg structure, introduces interdigital coupled structure at center conduction band, realizes low-frequency cutoff and broad passband coupling, adopts classical pbg structure, realize controlled stopband.
2, the utility model is based on the coplanar waveguide ultra wide band band pass filter of pbg structure, adopts coplanar waveguide transmission line, is easy to integrated, and design and adjustment decrease difficulty of processing at same plane, reduce processing cost.
3, the utility model is based on the coplanar waveguide ultra wide band band pass filter of pbg structure, not only structure is simple, volume is light and handy, be convenient to processing and integrated, and passband is wide, stopband is precipitous, and transition band is narrower, co-planar waveguide in conjunction with the meaningful exploration of the planar circuit of interdigital coupled structure and pbg structure, also for the exploitation of super broad band radio communication filter provides technological reserve.
Accompanying drawing explanation
Fig. 1 is tomograph the utility model medium substrate printing metallisation center conduction band.
Fig. 2 is the structure chart of the interdigital coupled structure of the utility model.
Fig. 3 is that the utility model introduces interdigital coupled structure on the metal center conduction band shown in Fig. 1.
Fig. 4 is any one unit figure of the utility model pbg structure and the pbg structure figure that is made up of this unit periodic arrangement.
Fig. 5 is the vertical view of the utility model based on the coplanar waveguide ultra wide band band pass filter of pbg structure.
Fig. 6 is the tomograph of the utility model based on the coplanar waveguide ultra wide band band pass filter of pbg structure.
Fig. 7 is the emulation S parameter figure of the utility model based on the coplanar waveguide ultra wide band band pass filter of pbg structure.
Wherein: 1 is medium substrate, 2 is metal center conduction band, and 3 is the interdigital coupled structure that metal center conduction band is introduced, and 4 is pbg structure ground plate.
Embodiment
Be described below in detail execution mode of the present utility model, the example of described execution mode is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Being exemplary below by the execution mode be described with reference to the drawings, only for explaining the utility model, and can not being interpreted as restriction of the present utility model.
The utility model is based on co-planar waveguide, the center conductor of co-planar waveguide introduces interdigital coupled structure, the stopband characteristic in special frequency channel of pbg structure is utilized to realize the stopband of filter, classical pbg structure is directly used as the ground connection of the both sides of co-planar waveguide center conduction band simultaneously in conjunction with interdigital coupled structure by the utility model first, achieve ultra wide band bandpass filter, being co-planar waveguide and the examples of many successful that pbg structure and interdigital coupled structure are combined, is also to the meaningful exploration of co-planar waveguide in conjunction with the planar circuit of new construction.
As Figure 1-4, Fig. 1 is tomograph the utility model medium substrate printing metallisation center conduction band, Fig. 2 is interdigital coupled structure figure, Fig. 3 introduces the interdigital coupled structure figure shown in Fig. 2 on the metal center conduction band shown in Fig. 1, Fig. 4 is any one ground plate unit figure of pbg structure ground plate and the pbg structure figure that is made up of this ground plate unit periodic arrangement, ground plate unit self is centrosymmetric, and the pbg structure ground plate that ground plate unit combination becomes is all symmetrical about transverse axis and the longitudinal axis.Wherein, 1 is medium substrate, and 2 is metal center conduction band, and 3 is the interdigital coupled structure that metal center conduction band is introduced, and 4 is pbg structure ground plate.
As shown in Figure 5 and Figure 6, the utility model is respectively based on the vertical view of the coplanar waveguide ultra wide band band pass filter of pbg structure and tomograph.The ground plate of Fig. 3 metal center conduction band both sides lays the ground plate of pbg structure as shown in Figure 4 as co-planar waveguide, pbg structure ground plate is symmetrical about metal center conduction band, and metal center conduction band and pbg structure ground plate are at grade, the co-planar waveguide shown in Fig. 5.Coplanar waveguide ultra wide band band pass filter based on pbg structure is an individual layer circuit structure, medium substrate in circuit structure only need at one side print metallisation center conduction band and the pbg structure ground plate being close to metal center conduction band both sides, simultaneously in a metal heart conduction band introduces interdigital coupled structure, and the another side of medium substrate there is no conductor to cover need not to process.
In the utility model preferred embodiment, medium substrate 1 adopts Rogers6010 dielectric-slab, and dielectric constant is 10.2, and thickness is 0.635 millimeter, and in interdigital coupled structure 3, the interdigital degree of depth is 1.3mm, and interdigital number is 5.The distance of metal center conduction band and metal center conduction band and both sides pbg structure ground plate obeys two principles: one is make characteristic impedance close to 50 ohm, and to mate practical application, two is the requirements meeting processing technology apart from the selection of size.The degree of depth interdigital in interdigital coupled structure and interdigital number adjustable.The ground plate cell size of metal center conduction band both sides pbg structure ground plate is adjustable, and the vertical and horizontal arrangement cycle is adjustable, and in the present embodiment, pbg structure ground plate is the ground plate cell array of the capable n row of m, and wherein m, n are positive integer.Interdigital coupled structure is used for realizing low frequency Trimmed sums passband close coupling, and pbg structure is for realizing the precipitous stopband of filter.
As shown in Figure 7, be the emulation S parameter figure of the utility model coplanar waveguide ultra wide band band pass filter, wherein transverse axis is frequency/GHz, and the longitudinal axis is S parameter/dB.Coplanar waveguide ultra wide band band pass filter based on pbg structure has good band-pass behavior, ultra wide band bandpass filter of the present utility model arises from 2.3GHz and terminates in 8.2GHz, the relative bandwidth at centre frequency 5.25GHz place is the ultra wide band bandpass filter that 112% ,-30dB stopband arises from that 13.6GHz terminates in 17.9GHz.
Above embodiment is only and technological thought of the present utility model is described; protection range of the present utility model can not be limited with this; every technological thought according to the utility model proposes, any change that technical scheme basis is done, all falls within the utility model protection range.
Claims (6)
1. based on the coplanar waveguide ultra wide band band pass filter of pbg structure, it is characterized in that: comprise medium substrate, in the middle of described one of them surface of medium substrate, print is covered with metal center conduction band, the two ends of this metal center conduction band are extended down to the edge of medium substrate a pair opposite side respectively, and metal center conduction band is perpendicular to a pair opposite side of aforementioned medium substrate; Described metal center conduction band both sides print is covered with metal ground plate, and on the metal ground plate of both sides respectively symmetry be etched with pbg structure and form pbg structure ground plate, there is gap between pbg structure ground plate and metal center conduction band, and be positioned at same plane; The centre of described metal center conduction band and along the Width of metal center conduction band having the multiple cracks be positioned on straight line, the rectangle finger perpendicular to crack place straight line is etched with between adjacent crack, and adjacent rectangle finger is directed in opposite directions, submission finger-like; Described pbg structure ground plate is the ground plate cell array of the capable n row of m, m, n are positive integer, described ground plate unit comprises middle square sheet metal, four angles of middle square sheet metal are respectively equipped with the identical square metal sheet of size, the square sheet metal of each square metal sheet and centre has lap, and identical square sized by this lap, the centre at four edges of middle square sheet metal is also etched with outward extending rectangle detail; Adjacently connected by rectangle detail between Slab element.
2. as claimed in claim 1 based on the coplanar waveguide ultra wide band band pass filter of pbg structure, it is characterized in that: the size of described rectangle finger is all identical.
3. as claimed in claim 1 based on the coplanar waveguide ultra wide band band pass filter of pbg structure, it is characterized in that: the number of described rectangle finger is 5.
4. as claimed in claim 1 based on the coplanar waveguide ultra wide band band pass filter of pbg structure, it is characterized in that: the degree of depth of described rectangle finger is 1.3mm.
5. as claimed in claim 1 based on the coplanar waveguide ultra wide band band pass filter of pbg structure, it is characterized in that: described medium substrate is Rogers6010 dielectric-slab.
6. as claimed in claim 1 based on the coplanar waveguide ultra wide band band pass filter of pbg structure, it is characterized in that: the shape of described medium substrate is rectangle.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520248496.4U CN204516875U (en) | 2015-04-23 | 2015-04-23 | Based on the coplanar waveguide ultra wide band band pass filter of pbg structure |
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| CN201520248496.4U CN204516875U (en) | 2015-04-23 | 2015-04-23 | Based on the coplanar waveguide ultra wide band band pass filter of pbg structure |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106532203A (en) * | 2016-10-18 | 2017-03-22 | 河南师范大学 | Bent 1-D PBG (photonic band gap) microstrip-based broadband band-stop filter |
| CN108417937A (en) * | 2018-02-07 | 2018-08-17 | 东南大学 | Areflexia co-planar waveguide bandstop filter |
| CN110098473A (en) * | 2019-04-26 | 2019-08-06 | 西安电子科技大学 | A kind of tightly coupled super surface array of rectification |
-
2015
- 2015-04-23 CN CN201520248496.4U patent/CN204516875U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106532203A (en) * | 2016-10-18 | 2017-03-22 | 河南师范大学 | Bent 1-D PBG (photonic band gap) microstrip-based broadband band-stop filter |
| CN108417937A (en) * | 2018-02-07 | 2018-08-17 | 东南大学 | Areflexia co-planar waveguide bandstop filter |
| CN108417937B (en) * | 2018-02-07 | 2020-06-02 | 东南大学 | Reflection-free coplanar waveguide band-stop filter |
| CN110098473A (en) * | 2019-04-26 | 2019-08-06 | 西安电子科技大学 | A kind of tightly coupled super surface array of rectification |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Jiangsu Nanyou IOT Technology Park Ltd. Assignor: Nanjing Post & Telecommunication Univ. Contract record no.: 2016320000210 Denomination of utility model: Co-planar waveguide ultra wide band band pass filter based on the PBG structure Granted publication date: 20150729 License type: Common License Record date: 20161114 |
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| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
| EC01 | Cancellation of recordation of patent licensing contract | ||
| EC01 | Cancellation of recordation of patent licensing contract |
Assignee: Jiangsu Nanyou IOT Technology Park Ltd. Assignor: Nanjing Post & Telecommunication Univ. Contract record no.: 2016320000210 Date of cancellation: 20180116 |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150729 Termination date: 20180423 |