CN106532203A - Bent 1-D PBG (photonic band gap) microstrip-based broadband band-stop filter - Google Patents
Bent 1-D PBG (photonic band gap) microstrip-based broadband band-stop filter Download PDFInfo
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- CN106532203A CN106532203A CN201610902644.9A CN201610902644A CN106532203A CN 106532203 A CN106532203 A CN 106532203A CN 201610902644 A CN201610902644 A CN 201610902644A CN 106532203 A CN106532203 A CN 106532203A
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- pbg
- microstrip
- stop filter
- band
- bent
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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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- Electromagnetism (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
The present invention discloses a bent 1-D PBG (photonic band gap) microstrip-based broadband band-stop filter. The bent 1-D PBG microstrip-based broadband band-stop filter comprises a dielectric substrate and metal printed on the dielectric substrate; three transversely-etched square holes are formed in the dielectric substrate; two longitudinally-etched square holes located just below the third transversely-etched square hole are formed in the dielectric substrate; the sizes of the five square holes are identical; and intervals between adjacent square holes are equal. According to the bent 1-D PBG microstrip-based broadband band-stop filter, improvements are made based on an original 1-D type PBG microstrip-based broadband band-stop filter, and therefore, the longitudinal length of the bent 1-D PBG microstrip-based broadband band-stop filter can be greatly reduced under a condition the wide stop-band feature of the bent 1-D PBG microstrip-based broadband band-stop filter is ensured, and the portability and miniaturization of the microstrip broadband band-stop filter are realized.
Description
Technical field
The invention belongs to wave filter technology field, and in particular to a kind of broadband belt resistance of 1-D PBG micro-strips based on bending
Wave filter.
Background technology
Recently as the fast development of microwave integrated circuit (MIC) technology, microstrip circuit is due to small volume, weight
Gently, simple structure, it is easy to process and with low cost the advantages of and attention.The microstrip filter of whole plane version is also wide
It is general to apply in MIC.For narrow band filter, what people were more is but the band being a commonly-available realizing with various resonators
It is wide general all very narrow, in broadband it is difficult to apply, and design comparison is complicated, so for Broadband bandstop filter, generally adopts
Realized with photon band gap (PBG) structure.
Pbg structure formula has the periodic structure of band-stop response, and the electromagnetic signal in frequency band gap can not be transmitted,
Be at first for optical application, but its minimum size causes difficulty of processing very high, then later research is just to low frequency
Direction is developed, and is widely applied in microwave, millimeter wave.The pbg structure for proposing both at home and abroad at present is varied, and early stage is main
If medium substrate is bored a hole, other materials etc. are filled in the dielectric substrate, this structure fabrication gets up extremely difficult, studies now
More be on the base plate of microstrip transmission line etching cycle structure to obtain PBG characteristics.PBG microstrip lines mainly have two kinds at present
Version：1-D structures and 2-D structures, wherein 1-D structures are to etch row's periodic structure to obtain immediately below microstrip line conduction band
PBG characteristics, are also related to labor and the application of the shape to performance impact in hole.Although this 1-D PBG microstrip structures ratio
It is relatively simple, but its longitudinal length is generally than larger；2-D structures are to increase the row of periodic structure in the horizontal reducing longitudinal direction
On hole count, but lateral length is again oversize.The present invention is excessive and devise a kind of bending for the longitudinal length of 1-D structures
1-D PBG microstrip lines, the analysis shows microstrip lines have good broad stop-band, and the more common 1-D of circuit size
PBG micro-strips are greatly reduced.
The content of the invention
The present invention provides a kind of base for solving the problems, such as in prior art that 1-D PBG microstrip structure longitudinal lengths are excessive
In the Broadband bandstop filter of the 1-D PBG micro-strips of bending, 1-D structures are curved design forming bending by the wave filter
PBG micro-strips, it is clear that longitudinal size can be greatly reduced.When dielectric material, substrate thickness etc. keep constant, whole circuit
Longitudinal size is greatly reduced compared with primary circuit, and simulation result shows that the wave filter still has good broad stop-band.
The present invention is to solve above-mentioned technical problem to adopt the following technical scheme that, a kind of 1-D PBG micro-strips based on bending
Broadband bandstop filter, including medium substrate and the metal being printed on medium substrate, it is characterised in that：Set on medium substrate
There is the square hole of three lateral etches, the medium substrate immediately below wherein the 3rd square hole is provided with two longitudinal directions and etches
Square hole, the spacing between the consistent size of five square holes and adjacent square hole is equal.
Further preferably, the spacing between adjacent square hole is 21.3mm, and the length of side of square hole is 10.2mm.
The present invention is improved on the basis of original Broadband bandstop filter based on the PBG micro-strips of 1-D forms, is protected
Demonstrate,prove which and longitudinal length is greatly reduced under conditions of good broad stop-band, realize microstrip broadband bandstop filter just
Taking and miniaturization.
Description of the drawings
Fig. 1 is the structural representation of common 1-D PBG microstrip bandstop filters；
Fig. 2 is the frequency curve of common 1-D PBG micro-strips；
Fig. 3 is the structural representation of the 1-D PBG microstrip bandstop filters of bending；
Fig. 4 is the frequency curve of the 1-D PBG micro-strips of bending.
Specific embodiment
The particular content of the present invention is described in detail with reference to accompanying drawing.
For usually, the characteristic of pbg structure is mainly determined by following factor：The number of periodic unit, periodic unit
Dielectric constant of geometry, the arrangement mode of periodic unit and medium etc..The thickness of usual pbg structure dielectric substrate and phase
All be selected to dielectric constant, so determine the parameter of pbg structure characteristic just only have the distance between the size in hole, hole and
The number of periodic unit.Centre frequency f of stopband0It is the function of pbg structure cycle d, specific relation is as follows：
F in formula0For stopband center frequency；C is the light velocity in vacuum；D is the spacing between periodic structure；εeFor microstrip line
Effective dielectric constant.Specific frequency is directed to according to above formula, it is possible to determine the size of periodic structure, complete circuit
Design.
It is stopband center frequency f according to required design bandstop filter first0=4.5GHz, designs a common 1-
D PBG microstrip bandstop filters.By formulaSubstantially determine board dimension, the dielectric constant of dielectric substrate is selected
For εr=2.65, substrate thickness is set to h=1mm.Microstrip line is designed according to 50 Ω standard microstrips, and conduction band width is about 2.7mm,
Periodic structure spacing is 21.3mm, and square hole is about 2 according to the ratio of the length of side of periodic structure spacing and square hole:1 design, in circuit
Square hole edge length is taken for 10.2mm.Now the longitudinal size of whole circuit board has reached 130mm.Common 1-D PBG micro-strip bands
Resistance wave filter is as shown in figure 1, carry out frequency characteristic emulation to the wave filter, simulation result is as shown in Fig. 2 wherein solid line is S21It is bent
Line, dotted line are S11Curve.The design meets and requires as we can see from the figure.
Then, it is in order to reduce longitudinal size, 1-D PBG microstrip bandstop filters above is vertical from middle square hole position
It is bent downwardly, forms a kind of 1-D PBG microstrip bandstop filters of bending, dielectric material, substrate thickness etc. and keep constant, this
When whole circuit longitudinal size be reduced to 80mm, greatly reduce compared with primary circuit, the 1-D PBG microstrip bandstop filters of bending are such as
Shown in Fig. 3, frequency characteristic emulation is carried out to the wave filter, simulation result is as shown in figure 4, wherein solid line is S21Curve, dotted line is
S11Curve.As can be seen from the figure：When 1-D PBG micro-strips are bent, stopband attenuation slightly reduces, but the frequency of whole circuit
Rate curve remains in that good band-stop response, and now the longitudinal size of whole circuit is obviously reduced.In addition in centre frequency f0
Frequency multiplication position at also have an obvious forbidden band, from from the viewpoint of network topology, this is also PBG microstrip structures as one kind
The intrinsic characteristic of periodic structure.
In sum, the present invention have devised a kind of Broadband bandstop filter of the 1-D PBG micro-strips based on bending, adopt
Frequency Simulation Software HFSS is emulated to which, and simulation result shows, and on its longitudinal direction
Physical length greatly reduce, for microstrip broadband bandstop filter facilitation and miniaturization provide beneficial help.
Have been shown and described above the general principle of the present invention, principal character and advantage, without departing from spirit of the invention and
On the premise of scope, the present invention also has various changes and modifications, and these changes and improvements both fall within claimed invention
Scope.
Claims (2)
1. a kind of Broadband bandstop filter of the 1-D PBG micro-strips based on bending, including medium substrate and being printed on medium substrate
On metal, it is characterised in that：The square hole of three lateral etches is provided with medium substrate, wherein the 3rd square hole
Immediately below medium substrate be provided with the square holes of two longitudinal direction etchings, the consistent size of five square holes and adjacent
Spacing between square hole is equal.
2. it is according to claim 1 based on bending 1-D PBG micro-strips Broadband bandstop filter, it is characterised in that：Phase
Spacing between adjacent square hole is 21.3mm, and the length of side of square hole is 10.2mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610902644.9A CN106532203A (en) | 2016-10-18 | 2016-10-18 | Bent 1-D PBG (photonic band gap) microstrip-based broadband band-stop filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610902644.9A CN106532203A (en) | 2016-10-18 | 2016-10-18 | Bent 1-D PBG (photonic band gap) microstrip-based broadband band-stop filter |
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| Publication Number | Publication Date |
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| CN106532203A true CN106532203A (en) | 2017-03-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610902644.9A Pending CN106532203A (en) | 2016-10-18 | 2016-10-18 | Bent 1-D PBG (photonic band gap) microstrip-based broadband band-stop filter |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030071763A1 (en) * | 2001-08-06 | 2003-04-17 | Mckinzie William E. | Low frequency enhanced frequency selective surface technology and application |
| CN204516875U (en) * | 2015-04-23 | 2015-07-29 | 南京邮电大学 | Based on the coplanar waveguide ultra wide band band pass filter of pbg structure |
-
2016
- 2016-10-18 CN CN201610902644.9A patent/CN106532203A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030071763A1 (en) * | 2001-08-06 | 2003-04-17 | Mckinzie William E. | Low frequency enhanced frequency selective surface technology and application |
| CN204516875U (en) * | 2015-04-23 | 2015-07-29 | 南京邮电大学 | Based on the coplanar waveguide ultra wide band band pass filter of pbg structure |
Non-Patent Citations (2)
| Title |
|---|
| VESNA RADISIC ET AL: ""Novel 2-D Photonic Bandgap Structure for Microstrip Lines"", 《IEEE MICROWAVE AND GUIDED WAVE LETTERS》 * |
| 付云起等: ""微带线PBG结构研究"", 《2001年全国微波毫米波会议论文集》 * |
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Application publication date: 20170322 |