CN203721858U - Ultra-wideband trap wave filter - Google Patents
Ultra-wideband trap wave filter Download PDFInfo
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- CN203721858U CN203721858U CN201420092591.5U CN201420092591U CN203721858U CN 203721858 U CN203721858 U CN 203721858U CN 201420092591 U CN201420092591 U CN 201420092591U CN 203721858 U CN203721858 U CN 203721858U
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- feeder line
- parallel coupling
- transmission unit
- input
- coupling feeder
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Abstract
The utility model discloses an ultra-wideband trap wave filter. The ultra-wideband trap wave filter is characterized by comprising the following devices: a first input/output port (1), a second input/output port (2) and a substrate (12). The first input/output port (1) and the second input/output port (2) are disposed at the same horizontal line and are disposed at the two sides of the substrate (12). The substrate (12) is provided with an upper surface and a lower surface. The ultra-wideband trap wave filter has the advantages of simple structure, miniaturization and good in-band selectivity, independently adjustable three trap wave characteristics, facilitated product debugging and batch production, and the like.
Description
Technical field
The utility model patent 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, for example, owing to having other various narrowband wireless communication signals, 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, guarantee 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) and middle utilization loads open circuit detail and designs band trap ultra-wide band filter on parallel coupled line, but 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, 2009,19:500-502) in utilize 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 costliness, 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), described the first input/output end port (1) and the second input/output end port (2) are positioned at the both sides on a horizontal line and in substrate (12), and this substrate (12) has a upper surface and lower surface;
The upper surface of described this substrate (12) has 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 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 GHz.
The dielectric constant of described substrate (12) is 3.45-3.49, and thickness is 0.85mm, loss angle 0.0026-0.0029.
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.
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 of change; 3) bandwidth of three traps can be adjusted by the physical width that changes U-shaped groove resonator; 4) ultra-wide band filter simple in structure realized miniaturization, handling ease, and production cost is low and be convenient to debugging.
Brief description of the drawings
Fig. 1 is the Facad structure schematic diagram of this patent.
Fig. 2 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 shown in Figure 1, 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), described the first input/output end port (1) and the second input/output end port (2) are positioned at the both sides on a horizontal line and in substrate (12), and this substrate (12) has a upper surface and lower surface;
The upper surface of described this substrate (12) has 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 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 substrate (12) is 3.45-3.49, and thickness is 0.85mm, loss angle 0.0026-0.0029.
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 2, 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 2, in centre frequency, 6.8 GHz places have trap characteristic, trap amplitude is all greater than 25dB, there are two transmission zeros to realize this filter at frequency 2.0GHz, 10.9GHz place 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 (7)
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 at the both sides on a horizontal line and in substrate (12), and this substrate (12) has a upper surface and lower surface;
The upper surface of described this substrate (12) has 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).
2. a kind of ultra broadband notch filter as claimed in claim 1, is characterized in that 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).
3. 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.
4. a kind of ultra broadband notch filter as claimed in claim 1, the dielectric constant that it is characterized in that described substrate (12) is 3.45-3.49, thickness is 0.85mm, loss angle 0.0026-0.0029.
5. 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.
6. 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.
7. 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) are 55 Ω transmission lines.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420092591.5U CN203721858U (en) | 2014-03-03 | 2014-03-03 | Ultra-wideband trap wave filter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420092591.5U CN203721858U (en) | 2014-03-03 | 2014-03-03 | Ultra-wideband trap wave filter |
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| CN203721858U true CN203721858U (en) | 2014-07-16 |
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| CN201420092591.5U Expired - Fee Related CN203721858U (en) | 2014-03-03 | 2014-03-03 | Ultra-wideband trap wave filter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104600401A (en) * | 2015-01-05 | 2015-05-06 | 西安理工大学 | Ultrawide band filter with triple-notching function |
-
2014
- 2014-03-03 CN CN201420092591.5U patent/CN203721858U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104600401A (en) * | 2015-01-05 | 2015-05-06 | 西安理工大学 | Ultrawide band filter with triple-notching function |
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| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140716 Termination date: 20150303 |
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| EXPY | Termination of patent right or utility model |