CN203326069U - Adjustable-passband UWB filter having ultra narrowband trap wave characteristics - Google Patents
Adjustable-passband UWB filter having ultra narrowband trap wave characteristics Download PDFInfo
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- CN203326069U CN203326069U CN201220665434XU CN201220665434U CN203326069U CN 203326069 U CN203326069 U CN 203326069U CN 201220665434X U CN201220665434X U CN 201220665434XU CN 201220665434 U CN201220665434 U CN 201220665434U CN 203326069 U CN203326069 U CN 203326069U
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- passband
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- counterfoil
- filter
- uwb
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Abstract
The utility model discloses an adjustable-passband UWB filter having ultra narrowband trap wave characteristics. The filter comprises a medium base plate (104), and a multi-mode resonant cavity (101), a fractal paster structure (106), an open circuit microstrip line stub (103) and a combination type transmission coupling wire (102) which are on the medium base plate, and a metal grounding plate (105) below the medium base plate. According to the adjustable-passband UWB filter, the multi-mode resonant cavity is utilized to realize passband bandwidth required by UWB and adjustable passband, the open circuit microstrip line stub realizes ultra narrowband trap wave characteristics. A trap wave is near 6.8Ghz and can filter interference of an RFID signal on a UWB filter. The adjustable-passband UWB filter has advantages of simple design, compact structure, convenient processing and low cost.
Description
Technical field
It is adjustable and have a UWB filter of super arrowband trap characteristic that the utility model relates to a kind of passband, this filter can filtering UWB in the interference of RFID signal.
Background technology
In February, 2002, FCC (FCC) approval 3.1-10.6GHz frequency range is for business telecommunication, so UWB is widely used.Yet, in the commercial scope of FCC definition, the UWB signal may be subject to such as WiAX(3.5-GHz), WLAN(5.15-5.825GHz), RFID(6.8GHz) etc. the interference of signal.How solving co-channel interference becomes UWB research important content, and the filter that therefore has trap characteristic has very high practical value.
Some mentalities of designing occurred in recent years, as introduced, differed from and refer to the line of rabbet joint, realize trap characteristic, but the passband of broadband filter has been non-adjustable.So the UWB filter that the design passband is adjustable and have a super arrowband trap characteristic has great importance.
The utility model content
The purpose of this utility model is to provide passband adjustable and have the UWB filter of super arrowband trap characteristic, and this filter can reduce the interference of RFID signal to the UWB signal.
The technical scheme that the utility model adopts:
Passband is adjustable and have the UWB filter of super arrowband trap characteristic, comprise the multimode cavity (101) that is formed at the dielectric-slab upper surface, fractal paster structure (106), open circuit microstrip line counterfoil (103), combined transmission coupling line (102), it is characterized in that, described multimode cavity comprises that annulus loads counterfoil (1011), microstrip transmission line (1012), straight-flanked ring loads counterfoil (1013) and open circuit loads counterfoil (1014).
Described passband is adjustable and have the UWB filter of super arrowband trap characteristic, it is characterized in that, has the open circuit microstrip line counterfoil (103) that two sections different microstrip lines of width form, and by open circuit microstrip line counterfoil, produces trap characteristic; And the twice of the width that the width of wide microstrip line (1031) is narrow microstrip line (1032).
Described passband is adjustable and have the UWB filter of super arrowband trap characteristic, it is characterized in that, combined transmission coupling line (102) is open circuit toe structure, and the width of every toe equates with the gap between each toe.
Described passband is adjustable and have the UWB filter of super arrowband trap characteristic, it is characterized in that having square fractal paster structure (106), to improve the decay of passband both sides, suppresses.
Described passband is adjustable and have the UWB filter of super arrowband trap characteristic, it is characterized in that, multimode cavity load counterfoil (1011), microstrip transmission line (1012) and straight-flanked ring loading counterfoil (1013) by annulus, open circuit loads counterfoil (1014) and forms, and by adjusting annulus, loads the radius of counterfoil (1011) and the ultra broadband that microstrip transmission line (1012) length and width produce 3.1-10.6GHz.
This utility model filter has following characteristic and advantage with respect to existing filter:
Simplicity of design, compact conformation, easy to process, with low cost, passband is adjustable.
By adjusting the size of multimode resonator (101), can regulate passband at UWB(3.1-10.6GHz) scope.
Passband is adjustable does not affect trap frequency.
Improving the decay of passband both sides by foursquare fractal paster structure (106) suppresses.
The accompanying drawing explanation
Fig. 1 is the basic structure vertical view of the utility model embodiment 1;
Fig. 2 is the basic structure end view of the utility model embodiment 1;
Fig. 3 is the multimode cavity structure chart of the utility model embodiment 1;
Fig. 4 is the open circuit microstrip line counterfoil structure chart of the utility model embodiment 1;
Embodiment
It is adjustable and have a UWB filter of super arrowband trap characteristic that the utility model has designed passband, this filter can filtering UWB in the interference of RFID signal.
Below in conjunction with the accompanying drawing distance, utility model is described in more detail:
As shown in Figure 2, medium substrate (104) is the RT/Duroid6010 that dielectric constant is 10.2 to an example of the present utility model.The thickness of this medium substrate is 1.27mm, and the dielectric loss tangent angle is 0.0023.Metal ground plate under medium substrate (105) adopts copper product.
As shown in Figure 1, passband of the present utility model is adjustable and have the UWB filter of super arrowband trap characteristic, multimode cavity on medium substrate (101), open circuit microstrip line counterfoil (103), combined transmission coupling line (102), fractal paster structure (106) adopts copper product.
As shown in Figure 1, improving the decay of passband both sides by fractal paster structure (106) suppresses.
As shown in Figure 3, passband of the present utility model is adjustable and have the UWB filter of super arrowband trap characteristic, its multimode cavity comprises that annulus loads counterfoil (1011), microstrip transmission line (1012) and straight-flanked ring and loads counterfoil (1013), open circuit loads counterfoil (1014), by multimode cavity, realizes broadband character.
As shown in Figure 4, the utility model passband is adjustable and UWB filter with super arrowband trap characteristic has the open circuit microstrip line counterfoil (103) that two sections different microstrip lines of width form, and by open circuit microstrip line counterfoil, produces trap characteristic; And the twice of the width that the width of wide microstrip line (1031) is narrow microstrip line (1032).
The design parameter of the UWB filter of the two trap characteristics of this utility model:
The selection of medium substrate: the RT/Duroid6010 that dielectric constant is 10.2.The dielectric constant of general medium substrate is between 2--9.8, and the utility model adopts 10.2 substrate,, high dielectric constant makes the guide wavelength of signal less, and it is less that circuit can be done.The dielectric loss tangent angle of substrate is 0.0023, has guaranteed that loss is less.The thickness of this medium substrate is that 1.27mm meets required intensity.Multimode cavity and the metal ground plate under medium substrate on medium substrate all adopt copper product.
The design of multimode resonator: according to the filter correlation theory, design meets the circular ring structure resonant element of ultra-wideband communications.By adjusting annular radii and transmission line length and width, adjust bandwidth and cut-off frequency, make related filter meet the UWB demand.
Open circuit microstrip line counterfoil design: according to micro-band transmission theory, calculate resonance frequency, thereby design two sections dimension of microstrip line that band forms counterfoil, produce trap characteristic, the signal at elimination resonance frequency place, thereby inhibition zone external signal.
Claims (5)
1. passband is adjustable and have a UWB filter of super arrowband trap characteristic, comprise the multimode cavity (101) that is formed at the dielectric-slab upper surface, fractal paster structure (106), open circuit microstrip line counterfoil (103), combined transmission coupling line (102), it is characterized in that, described multimode cavity comprises that annulus loads counterfoil (1011), microstrip transmission line (1012), straight-flanked ring loads counterfoil (1013) and open circuit loads counterfoil (1014).
2. passband is adjustable and have the UWB filter of super arrowband trap characteristic according to claim 1, it is characterized in that having the open circuit microstrip line counterfoil (103) that two sections different microstrip lines of width form, and by open circuit microstrip line counterfoil, produces trap characteristic; And the twice of the width that the width of wide microstrip line (1031) is narrow microstrip line (1032).
3. passband is adjustable and have the UWB filter of super arrowband trap characteristic according to claim 1, it is characterized in that, combined transmission coupling line (102) is open circuit toe structure, and the width of every toe equates with the gap between each toe.
4. passband is adjustable and have the UWB filter of super arrowband trap characteristic according to claim 1, it is characterized in that having square fractal paster structure (106), to improve the decay of passband both sides, suppresses.
5. adjustable according to the described passband of claim 1 or 2 and there is the UWB filter of super arrowband trap characteristic, it is characterized in that, multimode cavity load counterfoil (1011), microstrip transmission line (1012) and straight-flanked ring loading counterfoil (1013) by annulus, open circuit loads counterfoil (1014) and forms, and by adjusting annulus, loads the radius of counterfoil (1011) and the ultra broadband that microstrip transmission line (1012) length and width produce 3.1-10.6GHz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220665434XU CN203326069U (en) | 2012-12-06 | 2012-12-06 | Adjustable-passband UWB filter having ultra narrowband trap wave characteristics |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220665434XU CN203326069U (en) | 2012-12-06 | 2012-12-06 | Adjustable-passband UWB filter having ultra narrowband trap wave characteristics |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203326069U true CN203326069U (en) | 2013-12-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220665434XU Expired - Fee Related CN203326069U (en) | 2012-12-06 | 2012-12-06 | Adjustable-passband UWB filter having ultra narrowband trap wave characteristics |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104767015A (en) * | 2015-03-30 | 2015-07-08 | 西安理工大学 | Miniature ultra-wideband filter |
| CN106410338A (en) * | 2016-11-18 | 2017-02-15 | 桂林电子科技大学 | High temperature superconducting filter |
-
2012
- 2012-12-06 CN CN201220665434XU patent/CN203326069U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104767015A (en) * | 2015-03-30 | 2015-07-08 | 西安理工大学 | Miniature ultra-wideband filter |
| CN104767015B (en) * | 2015-03-30 | 2018-02-27 | 西安理工大学 | Miniature ultra wide band wave filter |
| CN106410338A (en) * | 2016-11-18 | 2017-02-15 | 桂林电子科技大学 | High temperature superconducting filter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131204 Termination date: 20151206 |
|
| EXPY | Termination of patent right or utility model |