CN203288721U - Double-trap-wave UWB filter with adjustable trap wave and adjustable passband - Google Patents
Double-trap-wave UWB filter with adjustable trap wave and adjustable passband Download PDFInfo
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- CN203288721U CN203288721U CN201220650711XU CN201220650711U CN203288721U CN 203288721 U CN203288721 U CN 203288721U CN 201220650711X U CN201220650711X U CN 201220650711XU CN 201220650711 U CN201220650711 U CN 201220650711U CN 203288721 U CN203288721 U CN 203288721U
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- counterfoil
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Abstract
The utility model discloses a double-trap-wave UWB filter with adjustable trapped waves and adjustable passbands. The filter comprises a medium substrate (104), a multi-mode resonant cavity (101) and an open circuited stud micro-strip structure (103) and a combined transmission coupling wire (102) on the medium substrate, and a metallic ground plate (105) under the medium substrate. The bandwidth of the pass-band meets the UWB requirements by utilizing a multi-mode resonant cavity, and the pass-band is adjustable. The open circuited stud micro-strip structure realizes double trapped waves and the trapped waves are adjustable. The double-trap-wave UWB filter has good double-trap-wave feature, the double trapped waves are next to 5.2/5.7GHz, and interference of WLAN signals on the UWB filter can be filtered. The filter is simple in design, compact in structure, convenient for processing, low in cost and adjustable for trapped waves and pass-band.
Description
Technical field
The utility model relates to two trap UWB filters that a kind of trap is adjustable and passband is adjustable, this filter can filtering UWB in the interference of WLAN 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 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 multimode resonator (MMR), via structure etc., although these structures can realize the trap effect, but trap is non-adjustable.Or introduce the poor line of rabbet joint that refers to, and realize two trap characteristics, although trap is adjustable, the passband of broadband filter is non-adjustable.So it is adjustable that design has passband, two trap UWB filters that trap is adjustable have great importance.
The utility model content
The purpose of this utility model is to provide has two trap UWB filters that passband is adjustable and trap is adjustable, and this filter can reduce the interference of WLAN signal to the UWB signal.
The technical scheme that the utility model adopts:
Two trap UWB filters that a kind of trap is adjustable and passband is adjustable, comprise the multimode cavity (101) that is formed at the dielectric-slab upper surface, microstrip structure (103), the combined transmission coupling line (102) of open circuit counterfoil, 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 adjustable and passband is adjustable, is characterized in that, has the microstrip structure (103) of two open circuit counterfoils (1031) (1032), produces trap characteristic and trap is adjustable; And the width of each counterfoil broadside of microstrip line of open circuit counterfoil equates, and each broadside equates with the gap of straight-flanked ring.
Two trap UWB filters that described trap is adjustable and passband is adjustable, is characterized in that, has the microstrip structure (103) of two open circuit counterfoils (1031) (1032), produces trap characteristic; , by the adjusting counterfoil length of opening a way, realize that trap is adjustable; And the width of each counterfoil broadside of microstrip line of open circuit counterfoil equates, and each broadside equates with the gap of straight-flanked ring.
Two trap UWB filters that described trap is adjustable and passband is adjustable, it is characterized in that, multimode cavity is loaded counterfoil (1011), microstrip transmission line (1012), straight-flanked ring loading counterfoil (1013) and is opened a way by annulus and loads counterfoil (1014) formation, by the radius of adjustment annulus loading counterfoil (1011) and the ultra broadband of microstrip transmission line (1012) length and width generation 3.1-10.6GHz.
Two trap UWB filters that described trap is adjustable and passband is adjustable, is characterized in that, the adjustment of above-mentioned annular radii and transmission line length and width, in the situation that adjust free transmission range, does not affect trap frequency; The adjustment of microstrip line counterfoil length, do not affect free transmission range yet, can realize passband adjustable with the adjustable non-interfering characteristic of trap, realize the compatibility of ultra-wideband communications and narrow-band communication system.
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, trap is adjustable.
, by adjusting the size of multimode resonator (101), can regulate passband at UWB(3.1-10.6GHz) scope.
, by the length of adjustment with open circuit counterfoil microstrip line construction (103), can realize that trap is adjustable.
Passband is adjustable Yu trap is adjustable does not interfere with each other.
Description of drawings
Fig. 1 is the basic structure end view of the utility model embodiment 1;
Fig. 2 is the basic structure vertical 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 line construction figure of the utility model embodiment 1;
Fig. 5 is the equivalent mode of the utility model embodiment 1;
Embodiment
The utility model has designed two trap UWB filters, and this filter trap is adjustable, passband is adjustable, and both adjustment are not interfere with each other.
Below in conjunction with the accompanying drawing distance, utility model is done more detailed description:
As shown in Figure 2, medium substrate (104) is that dielectric constant is 10.2 RT/Duroid6010 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, two trap UWB filtering that trap of the present utility model is adjustable and passband is adjustable, microstrip structure (103), the combined transmission coupling line (102) of the multimode cavity on medium substrate (101), open circuit counterfoil, adopt copper product.
As shown in Figure 3, two trap UWB filters that trap of the present utility model is adjustable and passband is adjustable, 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 UWB filter of the two trap characteristics of the utility model adopts the microstrip structure of two open counterfoils (1031) (1032) to realize two trap characteristics.
The design parameter of the UWB filter 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 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 counterfoil microstrip design:, according to little band transmission theory, calculate resonance frequency, thereby design the dimension of microstrip line with two open counterfoils, produce trap characteristic, the signal at elimination resonance frequency place, thereby inhibition zone external signal.
Claims (4)
1. two trap UWB filters that trap is adjustable and passband is adjustable, it is characterized in that, comprise the multimode cavity (101) that is formed at the medium substrate upper surface, microstrip structure (103), the combined transmission coupling line (102) of open circuit counterfoil, 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. two trap UWB filters that trap according to claim 1 is adjustable and passband is adjustable, is characterized in that, has the microstrip structure (103) of two open circuit counterfoils (1031), (1032), produces trap characteristic; , by the adjusting counterfoil length of opening a way, realize that trap is adjustable; And the width of each counterfoil broadside of microstrip line of open circuit counterfoil equates, and each broadside equates with the gap of straight-flanked ring.
3. two trap UWB filters that trap according to claim 1 is adjustable and passband is adjustable, 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. two trap UWB filters that trap according to claim 1 and 2 is adjustable and passband is adjustable, it is characterized in that, multimode cavity is loaded counterfoil (1011), microstrip transmission line (1012), straight-flanked ring loading counterfoil (1013) and is opened a way by annulus and loads counterfoil (1014) formation, by the radius of adjustment annulus loading counterfoil (1011) and the ultra broadband of microstrip transmission line (1012) length and width generation 3.1-10.6GHz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220650711XU CN203288721U (en) | 2012-11-30 | 2012-11-30 | Double-trap-wave UWB filter with adjustable trap wave and adjustable passband |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220650711XU CN203288721U (en) | 2012-11-30 | 2012-11-30 | Double-trap-wave UWB filter with adjustable trap wave and adjustable passband |
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| Publication Number | Publication Date |
|---|---|
| CN203288721U true CN203288721U (en) | 2013-11-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220650711XU Expired - Fee Related CN203288721U (en) | 2012-11-30 | 2012-11-30 | Double-trap-wave UWB filter with adjustable trap wave and adjustable passband |
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| CN (1) | CN203288721U (en) |
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 |
-
2012
- 2012-11-30 CN CN201220650711XU patent/CN203288721U/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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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: 20131113 Termination date: 20151130 |
|
| EXPY | Termination of patent right or utility model |