CN203056055U - UWB filter with double steep trap waves - Google Patents
UWB filter with double steep trap waves Download PDFInfo
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- CN203056055U CN203056055U CN 201220666696 CN201220666696U CN203056055U CN 203056055 U CN203056055 U CN 203056055U CN 201220666696 CN201220666696 CN 201220666696 CN 201220666696 U CN201220666696 U CN 201220666696U CN 203056055 U CN203056055 U CN 203056055U
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- trap
- counterfoil
- microstrip
- precipitous
- open circuit
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Abstract
The utility model discloses a UWB filter with double steep trap waves. The UWB filter comprises a multi-mode resonant cavity 101, a fractal patch structure 106, an open circuited stud micro-strip structure 103 and a combined transmission coupling wire 102 formed on the upper surface of a medium plate, wherein the multi-mode resonant cavity comprises a circular loop loading stub 1011, a micro-strip transmission line 1012, a rectangular loop loading stub 1013 and an open circuited loading stud 1014. The pass-band of the filter is adjustable, and the interference of WLAN signal on the UWB filter can be minimized.
Description
Technical field
The utility model relates to the precipitous two trap UWB filters of a kind of trap, and this filter passband is adjustable, and the interference of WLAN signal in can filtering UWB.
Background technology
In February, 2002, FCC (FCC) approval 3.1-10.6GHz frequency range is used for business telecommunication, so UWB is widely used.Yet in the commercial scope of FCC definition, the UWB signal may be subjected 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.
Occurred some mentalities of designing in recent years, as introduced the poor line of rabbet joint that refers to, realize the precipitous two trap characteristics of trap, but the passband of broadband filter has been non-adjustable.So it is adjustable that design has passband, and the precipitous two trap UWB filters of trap have great importance.
The utility model content
Two trap UWB filters of providing trap precipitous are provided the purpose of this utility model, and this filter passband is adjustable, and can reduce the WLAN signal to the interference of UWB signal.
The technical scheme that the utility model adopts:
Two trap UWB filters that trap is precipitous, comprise multimode cavity 101, the fractal paster structure 106 that is formed at the dielectric-slab upper surface, microstrip structure 103, the combined transmission coupling line 102 of the counterfoil of opening a way, it is characterized in that affiliated multimode cavity comprises that annulus loads counterfoil 1011, microstrip transmission line 1012, straight-flanked ring loads counterfoil 1013 and open circuit loads counterfoil 1014.
Two trap UWB filters that described trap is precipitous is characterized in that, have that two open circuit microstrip line counterfoils 1031,1032 form microstrip structure 103, produce trap characteristic; Open circuit microstrip line counterfoil is made of two sections different microstrip lines of width, and the width of wide microstrip line is the twice of narrow micro belt line width.
Two trap UWB filters that described trap is precipitous is characterized in that, combined transmission coupling line 102 is open circuit toe structure, and the width of every toe equates with gap between each toe.
Two trap UWB filters that described trap is precipitous is characterized in that having square fractal paster structure 106, suppress to improve the decay of passband both sides.
Two trap UWB filters that described trap is precipitous, it is characterized in that, the loading counterfoil 1011, microstrip transmission line 1012 and straight-flanked ring by annulus and load counterfoil 1013 of multimode cavity, open circuit loads counterfoil 1014 and constitutes, and loads the radius of counterfoil 1011 and the ultra broadband that transmission line 1012 length and width produce 3.1-10.6GHz by adjusting annulus.
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.
The size of the microstrip structure 103 by adjusting the open circuit counterfoil can realize two trap characteristics that trap is precipitous.
Passband is adjustable not to influence trap frequency.
Improving the decay of passband both sides by foursquare fractal paster structure 106 suppresses.
Description of drawings
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 counterfoil microstrip structure figure of the utility model embodiment 1;
Embodiment
The utility model has designed the precipitous two trap UWB filters of trap, and this filter passband is adjustable and can reduce the WLAN signal to the interference of UWB signal.
Below in conjunction with the accompanying drawing distance utility model is done more detailed description:
An example of the present utility model as shown in Figure 2, medium substrate 104 is that dielectric constant is 10.2 RT/Duroid6010.The thickness of this medium substrate is 1.27mm, and the dielectric loss tangent angle is 0.0023.Metal ground plate 105 under the medium substrate adopts copper product.
As shown in Figure 1, two trap UWB filters that trap of the present utility model is precipitous, microstrip structure 103, the combined transmission coupling line 102 of the multimode cavity 101 on the medium substrate, open circuit counterfoil, fractal paster structure 106 adopts copper product.
As shown in Figure 3, two trap UWB filters that trap of the present utility model is precipitous, its multimode cavity comprises that annulus loads counterfoil 1011, microstrip transmission line 1012 and straight-flanked ring and loads counterfoil 1013, and open circuit loads counterfoil 1014, realizes broadband character by multimode cavity.
As shown in Figure 4, the two trap UWB filters that the utility model trap is precipitous adopt that two open circuit microstrip line counterfoils 1031,1032 form microstrip structure 103, produce trap characteristic; Open circuit microstrip line counterfoil is made of two sections different microstrip lines of width, and the width of wide microstrip line is the twice of narrow micro belt line width.Adjust the width of wide microstrip line and narrow microstrip line, realize the precipitous two trap characteristics of trap.
Two trap UWB Filter Design parameters that this utility model trap is precipitous:
The selection of medium substrate: dielectric constant is 10.2 RT/Duroid6010.The dielectric constant of general medium substrate is between the 2--9.8, and the utility model adopts 10.2 substrate,, high dielectric constant makes the guide wavelength of signal littler, and it is littler 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 satisfies required intensity.Multimode cavity and the metal ground plate under the medium substrate on the medium substrate all adopt copper product.
The design of multimode resonator: according to the filter correlation theory, the circular ring structure resonant element of ultra-wideband communications is satisfied in design.By adjusting annular radii and transmission line length and width, adjust bandwidth and cut-off frequency, make related filter satisfy the UWB demand.
Open counterfoil microstrip line design: according to little band transmission theory, calculate resonance frequency, thereby design the dimension of microstrip line with two open circuit counterfoils, produce trap characteristic, the signal at elimination resonance frequency place, thereby inhibition zone external signal.
Claims (5)
1. precipitous two trap UWB filters of trap, the microstrip structure (103), the combined transmission coupling line (102) that comprise the multimode cavity (101) that is formed at the dielectric-slab upper surface, fractal paster structure (106), open circuit counterfoil, 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. according to the precipitous two trap UWB filters of the described trap of claim 1, it is characterized in that, have that two open circuit microstrip line counterfoils (1031) (1032) form microstrip structure (103), produce trap characteristic; Open circuit microstrip line counterfoil is made of two sections different microstrip lines of width, and the width of wide microstrip line is the twice of narrow micro belt line width.
3. according to the precipitous two trap UWB filters of the described trap of claim 1, it is characterized in that combined transmission coupling line (102) is open circuit toe structure, the width of every toe equates with gap between each toe.
4. according to the precipitous two trap UWB filters of the described trap of claim 1, it is characterized in that having square fractal paster structure (106), suppress to improve the decay of passband both sides.
5. according to claim 1 or the precipitous two trap UWB filters of 2 described traps, 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 constitutes, and loads the radius of counterfoil (1011) and the ultra broadband that transmission line (1012) length and width produce 3.1-10.6GHz by adjusting annulus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220666696 CN203056055U (en) | 2012-12-06 | 2012-12-06 | UWB filter with double steep trap waves |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220666696 CN203056055U (en) | 2012-12-06 | 2012-12-06 | UWB filter with double steep trap waves |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203056055U true CN203056055U (en) | 2013-07-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220666696 Expired - Fee Related CN203056055U (en) | 2012-12-06 | 2012-12-06 | UWB filter with double steep trap waves |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203056055U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106876840A (en) * | 2015-12-12 | 2017-06-20 | 哈尔滨飞羽科技有限公司 | A kind of new compact UWB bandpass filters with trap characteristic |
-
2012
- 2012-12-06 CN CN 201220666696 patent/CN203056055U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106876840A (en) * | 2015-12-12 | 2017-06-20 | 哈尔滨飞羽科技有限公司 | A kind of new compact UWB bandpass filters with trap characteristic |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130710 Termination date: 20131206 |