CN203056047U - An UWB filter being adjustable in passband and having an ultra-narrow band wave trapping characteristic - Google Patents
An UWB filter being adjustable in passband and having an ultra-narrow band wave trapping characteristic Download PDFInfo
- Publication number
- CN203056047U CN203056047U CN 201220656572 CN201220656572U CN203056047U CN 203056047 U CN203056047 U CN 203056047U CN 201220656572 CN201220656572 CN 201220656572 CN 201220656572 U CN201220656572 U CN 201220656572U CN 203056047 U CN203056047 U CN 203056047U
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- counterfoil
- adjustable
- filter
- open circuit
- passband
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Abstract
The utility model discloses an UWB filter being adjustable in passband and having an ultra-narrow band wave trapping characteristic. The filter is composed of a medium substrate (104), a multi-mode resonant cavity (101) on the medium substrate (104), an open circuit microstrip line stub (103), a combined transmission coupling wire (102), and a metal ground plate (105) below the medium substrate (104). The filter utilizes the multi-mode resonant cavity to realize UWB required passband bandwidths and passbands are adjustable. The open circuit microstrip line stub realizes the ultra-narrow band wave trapping characteristic. Trapped waves are around 6.8 GHz. Interferences caused by RFID signals on the UWB filter can be filtered out. The filter is simple in design, compact in structure, convenient in processing, and low in 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 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 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 RFID signal to the interference of 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, open circuit microstrip line counterfoil 103, the combined transmission coupling line 102 that are formed at the dielectric-slab upper surface, 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 are formed, and produces trap characteristic by open circuit microstrip line counterfoil; And the width of wide microstrip line 1031 is the twice of the width of 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 gap between each toe.
Described passband is adjustable and have the UWB filter of super arrowband trap characteristic, 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.
Passband is adjustable not to influence trap frequency.
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 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 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 under the 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, and the multimode cavity 101 on the medium substrate, open circuit microstrip line counterfoil 103, combined transmission coupling line 102 adopt copper product.
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, and open circuit loads counterfoil 1014, realizes broadband character by multimode cavity.
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 are formed, and produces trap characteristic by open circuit microstrip line counterfoil; And the width of wide microstrip line 1031 is the twice of the width of narrow microstrip line 1032.
The UWB Filter Design parameter of the two trap characteristics of this utility model:
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 circuit microstrip line counterfoil design: according to little band transmission theory, calculate resonance frequency, thereby design two sections dimension of microstrip line that band is formed counterfoil, produce trap characteristic, the signal at elimination resonance frequency place, thereby inhibition zone external signal.
Claims (4)
1. passband is adjustable and have a UWB filter of super arrowband trap characteristic, comprise the multimode cavity (101), open circuit microstrip line counterfoil (103), the combined transmission coupling line (102) that are formed at the dielectric-slab upper surface, 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. adjustable and have the UWB filter of super arrowband trap characteristic according to the described passband of claim 1, it is characterized in that having the open circuit microstrip line counterfoil (103) that two sections different microstrip lines of width are formed, produce trap characteristic by open circuit microstrip line counterfoil; And the width of wide microstrip line (1031) is the twice of the width of narrow microstrip line (1032).
3. adjustable and have the UWB filter of super arrowband trap characteristic according to the described passband 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. adjustable and have a UWB filter of super arrowband trap characteristic according to claim 1 or 2 described passbands, 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 201220656572 CN203056047U (en) | 2012-12-04 | 2012-12-04 | An UWB filter being adjustable in passband and having an ultra-narrow band wave trapping characteristic |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220656572 CN203056047U (en) | 2012-12-04 | 2012-12-04 | An UWB filter being adjustable in passband and having an ultra-narrow band wave trapping characteristic |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203056047U true CN203056047U (en) | 2013-07-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220656572 Expired - Fee Related CN203056047U (en) | 2012-12-04 | 2012-12-04 | An UWB filter being adjustable in passband and having an ultra-narrow band wave trapping characteristic |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203056047U (en) |
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2012
- 2012-12-04 CN CN 201220656572 patent/CN203056047U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C53 | Correction of patent for invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Wang Litao Inventor after: Xiong Jidong Inventor after: Yu Renjie Inventor after: Li Mingxu Inventor after: Qin Juchao Inventor before: Yu Renjie Inventor before: Li Mingxu Inventor before: Qin Juchao |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: YU RENJIE LI MINGXU QIN JUCHAO TO: WANG LITAO XIONG JIDONG YU RENJIE LI MINGXU QIN JUCHAO |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130710 Termination date: 20151204 |
|
| EXPY | Termination of patent right or utility model |