CN203800147U - Ultra-wide-band notch filter - Google Patents
Ultra-wide-band notch filter Download PDFInfo
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- CN203800147U CN203800147U CN201420091275.6U CN201420091275U CN203800147U CN 203800147 U CN203800147 U CN 203800147U CN 201420091275 U CN201420091275 U CN 201420091275U CN 203800147 U CN203800147 U CN 203800147U
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- feeder line
- parallel coupling
- transmission unit
- input
- coupling feeder
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Abstract
The utility model discloses an ultra-wide-band notch filter, which is characterized by comprising a first input/output port (1), a second input/output port (2) and a substrate (12), wherein the first input/output port (1) and the second input/output port (2) are positioned on the same horizontal line and arranged on both sides of the substrate (12); and the substrate (12) comprises a first dielectric plate (12-1), a second dielectric plate (12-2) and a bottom plate (12-3), the outer surface of the bottom plate is provided with a metal coating, and the dielectric constants of the first dielectric plate (12-1) and the second dielectric plate (12-2) are different. The ultra-wide-band notch filter has the advantages of simple structure, miniaturization, good in-band selectivity, triple wave trapping characteristic, capability of independently adjustable and the like, and is convenient for product debugging and batch production.
Description
Technical field
The utility model relates to a kind of ultra broadband notch filter, belongs to microwave transmission device technical field.
Background technology
Ultra broadband (Ultra-wideband, UWB) technology is, the advantage such as power consumption little, message transmission rate high, fail safe good low with its cost and become emerging in the world a kind of wireless communication technology in recent years.From 2002 FCC (Federal Communications Commission, FCC) by the frequency range approval of 3.1GHz～10.6GHz for since business correspondence, Ultra-wideband Communication Technology has been subject to increasing attention.Filter is a key element in radio ultra wide band system, how to design compact conformation, the own target of chasing through becoming researchers of well behaved ultra wide band bandpass filter.But, in whole ultra broadband band limits, owing to there being other various narrowband wireless communication signals, such as 6.8 GHz radio frequency identification signals etc.And these wireless communication signals meeting severe jamming radio ultra wide band systems, in order to suppress the phase mutual interference between different system, assurance radio ultra wide band system is normally worked, and active demand has the high performance mini ultra-wide band filter of trap characteristic.
Existing bibliographical information there is the ultra-wide band filter structure of trap characteristic:
Document 1(Shaman, H., and J. S. Hong, Asymmetric Parallel-Coupled Lines for Notch Implementation in UWB Filters,
iEEE Microwave and Wireless Components Letters, 2007,17:516-3518) middle utilization loads open circuit detail and designs band trap ultra-wide band filter on parallel coupled line, however the difficult adjusting of the centre frequency of trap frequency band;
Document 2(Hao, Z. C., and J. S. Hong, Compact UWB Filter With Double Notch-Bands Using Multilayer LCP Technology,
iEEE Microwave and Wireless Components Letters, 2009, utilize in 19:500-502) broadside coupled between sandwich construction to design band trap ultra-wide band filter, but sandwich construction is difficult for being applied to microwave circuit and cost of manufacture is expensive, is not easy to volume production;
Document 3(Wei, F., W. T. Li, X. W. Shi, and Q. L. Chen., Compact UWB Bandpass Filter with Triple-notched Bands Using Stepped Impedance Resonator,
iEEE Microwave and Wireless Components Letters, 2012,22:512-514) in by coupling step electric impedance resonator to ultra-wide band filter, obtain desired band trap ultra-wide band filter, but additionally increased the size of circuit.
In sum, in (1) document 1, the ultra-wide band filter with trap characteristic of design, simple in structure, but the centre frequency of trap frequency band is difficult for regulating; (2) in document 2, the band trap ultra-wide band filter of design is based on multilayer circuit structure, but due to cost of manufacture costliness and technology imperfection, is unfavorable for volume production; (3) the band trap ultra-wide band filter of single layer structure of design in document 3, is easy to processing and integrated, but the bandwidth of trap frequency band is difficult for regulating, and the selectivity of passband and stopband characteristic undesirable.
Summary of the invention
The object of the utility model patent is to provide a kind of ultra broadband notch filter, has in simple in structure, miniaturization, band that selectivity is good, three trap characteristics and an advantage such as all can be independently adjustable, is convenient to production debugging and batch production.
In order to achieve the above object, realizing technical solution of the present utility model is: a kind of ultra broadband notch filter, its feature is comprising with lower device: the first input/output end port (1), the second input/output end port (2) and substrate (12), and described the first input/output end port (1) and the second input/output end port (2) are positioned on a horizontal line and the both sides in substrate (12); This substrate (12) has first medium plate (12-1), second medium plate (12-2) and base plate (12-3), and the outer surface of this base plate has the coat of metal, and described first medium plate (12-1) is different with the dielectric constant of second medium plate (12-2);
On the first medium plate (12-1) of described substrate (12), there are the first uniform transmission unit (3), the second uniform transmission unit (4), the first parallel coupling feeder line (5), the second parallel coupling feeder line (6), E type resonance structure (7), U-shaped groove resonator (10) and center minor matters (11);
Described the first uniform transmission unit (3) is connected with the second input/output end port (2) with the first input/output end port (1) respectively with second one end, uniform transmission unit (4), the other end of described the first uniform transmission unit (3) and the second uniform transmission unit (4) is connected with the non-openend of the second parallel coupling feeder line (6) with the first parallel coupling feeder line (5) respectively, described E type resonance structure (7) is connected with center minor matters (11) by intermediate structure (7-2), the openend of described the first parallel coupling feeder line (5) and the second parallel coupling feeder line (6) is coupled by center minor matters (11), described U-shaped groove resonator (10) is embedded on E type resonance structure (7), described intermediate structure (7-2) also has a grounding through hole (7-1).
The material of the described coat of metal is selected from gold, silver or copper.
The two ends of described E type resonance structure (7) have the first open circuit resonance minor matters (8) and the second open circuit resonance minor matters (9)
The trap frequency band range that described U-shaped groove resonator (10) obtains can covering frequence be 3.1-10.6GHz.
The dielectric constant of described first medium plate (12-1) is 3.51, and thickness is 0.25mm, and the dielectric constant of second medium plate (12-2) is 3.12, and thickness is 0.19mm.
The openend of described the first parallel coupling feeder line (5) and the second parallel coupling feeder line (6) arranges in opposite directions.
Described the first parallel coupling feeder line (5) and the second parallel coupling feeder line (6) are positioned on same level line.
Described the first uniform transmission unit (3) and the second uniform transmission unit (4) are 55 Ω transmission lines.
This patent compared with prior art, its remarkable advantage: 1) utilize E type resonance structure to obtain the ultra-wide band filter of covering ultra wideband communications band 3.1-10.6GHz, realize this filter and there is selectivity and Out-of-band rejection effect in good band; 2) centre frequency of three traps can be adjusted by the physical length of the U-shaped groove resonator that changes; 3) bandwidth of three traps can be adjusted by changing the physical width of U-shaped groove resonator; 4) adopt the first medium plate of different-thickness and dielectric constant and second medium plate to form dielectric-slab; 5) ultra-wide band filter simple in structure realized miniaturization, handling ease, and production cost is low and be convenient to debugging.
Accompanying drawing explanation
Fig. 1 is the Facad structure schematic diagram of this patent.
Fig. 2 is the lateral plan of this patent.
Fig. 3 is the simulation curve of the frequency response of this patent.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the utility model is described in further detail, but execution mode of the present utility model is not limited to this.
As illustrated in fig. 1 and 2, a kind of ultra broadband notch filter, its feature is comprising with lower device: the first input/output end port (1), the second input/output end port (2) and substrate (12), and described the first input/output end port (1) and the second input/output end port (2) are positioned on a horizontal line and the both sides in substrate (12); This substrate (12) has first medium plate (12-1), second medium plate (12-2) and base plate (12-3), and the outer surface of this base plate has the coat of metal, and described first medium plate (12-1) is different with the dielectric constant of second medium plate (12-2);
On the first medium plate (12-1) of described substrate (12), there are the first uniform transmission unit (3), the second uniform transmission unit (4), the first parallel coupling feeder line (5), the second parallel coupling feeder line (6), E type resonance structure (7), U-shaped groove resonator (10) and center minor matters (11);
Described the first uniform transmission unit (3) is connected with the second input/output end port (2) with the first input/output end port (1) respectively with second one end, uniform transmission unit (4), the other end of described the first uniform transmission unit (3) and the second uniform transmission unit (4) is connected with the non-openend of the second parallel coupling feeder line (6) with the first parallel coupling feeder line (5) respectively, described E type resonance structure (7) is connected with center minor matters (11) by intermediate structure (7-2), the openend of described the first parallel coupling feeder line (5) and the second parallel coupling feeder line (6) is coupled by center minor matters (11), described U-shaped groove resonator (10) is embedded on E type resonance structure (7), described intermediate structure (7-2) also has a grounding through hole (7-1).(U-shaped groove resonator (10) is the white line part on E type resonance structure (7) in Fig. 1);
The material of the described coat of metal is selected from gold, silver or copper.
The two ends of described E type resonance structure (7) have the first open circuit resonance minor matters (8) and the second open circuit resonance minor matters (9)
The trap frequency band range that described U-shaped groove resonator (10) obtains can covering frequence be 3.1-10.6GHz.
The dielectric constant of described first medium plate (12-1) is 3.51, and thickness is 0.25mm, and the dielectric constant of second medium plate (12-2) is 3.12, and thickness is 0.19mm.
The openend of described the first parallel coupling feeder line (5) and the second parallel coupling feeder line (6) arranges in opposite directions.
Described the first parallel coupling feeder line (5) and the second parallel coupling feeder line (6) are positioned on same level line.
Described the first uniform transmission unit (3) and the second uniform transmission unit (4), be 55 Ω transmission lines.
Described the first parallel coupling feeder line 5 and the second parallel coupling feeder line 6 are respectively " [" and "] " shape and arrange in opposite directions with openend.
The E type resonance structure (7) that minor matters load forms by dual-mode resonator is folding;
By regulating U-shaped groove resonator (10) length to realize the adjusting to trap mid-band frequency, by change U-shaped groove resonator (10) width realize the adjusting to trap band bandwidth.
As shown in Figure 3, the frequency characteristic of embodiment comprises: S21(insertion loss) parameter and S11(return loss) parameter.Abscissa represents frequency component, and unit is GHz, and left side ordinate represents amplitude variable, and unit is dB.As can be seen from Figure 3, in centre frequency, 6.8 GHz places have trap characteristic, trap amplitude is all greater than 25dB, at frequency 2.0GHz, 10.9GHz place, there are two transmission zeros to realize this filter and there is good selectivity, and the Out-of-band rejection characteristic of ultra-wide band filter is fine, and the inhibition of-10dB can reach 16GHz.
Should be understood that these embodiment are only not used in restriction scope of the present utility model for the utility model is described.In addition should be understood that those skilled in the art can make various changes or modifications the utility model after having read the content of the utility model instruction, these equivalent form of values fall within the application's appended claims limited range equally.
Claims (6)
1. a ultra broadband notch filter, it is characterized in that comprising with lower device: the first input/output end port (1), the second input/output end port (2) and substrate (12), described the first input/output end port (1) and the second input/output end port (2) are positioned on a horizontal line and the both sides in substrate (12); This substrate (12) has first medium plate (12-1), second medium plate (12-2) and base plate (12-3), and the outer surface of this base plate has the coat of metal, and described first medium plate (12-1) is different with the dielectric constant of second medium plate (12-2);
On the first medium plate (12-1) of described substrate (12), there are the first uniform transmission unit (3), the second uniform transmission unit (4), the first parallel coupling feeder line (5), the second parallel coupling feeder line (6), E type resonance structure (7), U-shaped groove resonator (10) and center minor matters (11);
Described the first uniform transmission unit (3) and second one end, uniform transmission unit (4) respectively with the first input/output end port (1) and the second input output port (2) be connected, the other end of described the first uniform transmission unit (3) and the second uniform transmission unit (4) is connected with the non-openend of the second parallel coupling feeder line (6) with the first parallel coupling feeder line (5) respectively, described E type resonance structure (7) is connected with center minor matters (11) by intermediate structure (7-2), the openend of described the first parallel coupling feeder line (5) and the second parallel coupling feeder line (6) is coupled by center minor matters (11), described U-shaped groove resonator (10) is embedded on E type resonance structure (7), described intermediate structure (7-2) also has a grounding through hole (7-1),
The material of the described coat of metal is selected from gold, silver or copper;
The two ends of described E type resonance structure (7) have the first open circuit resonance minor matters (8) and the second open circuit resonance minor matters (9).
2. a kind of ultra broadband notch filter as claimed in claim 1, is characterized in that the trap frequency band range that described U-shaped groove resonator (10) obtains can covering frequence be 3.1-10.6GHz.
3. a kind of ultra broadband notch filter as claimed in claim 1, the dielectric constant that it is characterized in that described first medium plate (12-1) is 3.51, and thickness is 0.25mm, and the dielectric constant of second medium plate (12-2) is 3.12, and thickness is 0.19mm.
4. a kind of ultra broadband notch filter as claimed in claim 1, is characterized in that the openend of described the first parallel coupling feeder line (5) and the second parallel coupling feeder line (6) arranges in opposite directions.
5. a kind of ultra broadband notch filter as claimed in claim 1, is characterized in that described the first parallel coupling feeder line (5) and the second parallel coupling feeder line (6) are positioned on same level line.
6. a kind of ultra broadband notch filter as claimed in claim 1, is characterized in that described the first uniform transmission unit (3) and the second uniform transmission unit (4), is 55 Ω transmission lines.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420091275.6U CN203800147U (en) | 2014-03-03 | 2014-03-03 | Ultra-wide-band notch filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420091275.6U CN203800147U (en) | 2014-03-03 | 2014-03-03 | Ultra-wide-band notch filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203800147U true CN203800147U (en) | 2014-08-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420091275.6U Expired - Fee Related CN203800147U (en) | 2014-03-03 | 2014-03-03 | Ultra-wide-band notch filter |
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| Country | Link |
|---|---|
| CN (1) | CN203800147U (en) |
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2014
- 2014-03-03 CN CN201420091275.6U patent/CN203800147U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| 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: 20140827 Termination date: 20160303 |