CN203760600U - Ultra-wideband filter possessing compact structure and resisting WLAN interference - Google Patents
Ultra-wideband filter possessing compact structure and resisting WLAN interference Download PDFInfo
- Publication number
- CN203760600U CN203760600U CN201320764276.8U CN201320764276U CN203760600U CN 203760600 U CN203760600 U CN 203760600U CN 201320764276 U CN201320764276 U CN 201320764276U CN 203760600 U CN203760600 U CN 203760600U
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- ultra
- wide band
- wlan
- band filter
- shaped short
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Abstract
The utility model discloses an ultra-wideband filter possessing a compact structure and resisting WLAN interference, comprising a multi-mode resonator (1), transmission coupling lines (2), L-shaped short-circuit branch knots (3), a grounding surface (4) and a medium substrate (5). The multi-mode resonator, the transmission coupling lines, the L-shaped short-circuit branch knots are printed on the upper surface of the medium substrate and the grounding surface is printed on the back surface of the medium substrate. The broad band filter disclosed by the utility model is compact in structure and small in size, the frequency of the trap wave can be regulated through changing the sizes and the positions of the L-shaped short circuit branch knots and the same frequency interference problem of the ultra wide band communication system is solved.
Description
Technical field
The utility model relates to a kind of ultra-wide band filter of compact conformation, and realizes the interference function that suppresses WLAN frequency range on this basis.
Background technology
Along with the develop rapidly of wireless communication technology and radio multimedium business, ultra broadband (UWB) technology receives more and more researchers' concern.Ultra broadband, with advantages such as its two-forty, low-power consumption, high security and antijamming capability are strong, has boundless application prospect and quite huge market value.Due to the potential tempting application prospect of super-broadband tech, US Federal Communication Committee (FCC) has ratified the application of super-broadband tech in short-distance wireless communication field in February, 2002, this commercial applications that is super-broadband tech product has been opened gate, has promoted radio ultra wide band system and device progress of research thereof.As one of Primary Component of radio-frequency front-end, the quality of ultra-wide band filter performance directly affects the quality of whole communication system.In order to adapt to the requirement of microwave integrated circuit miniaturization, filter not only wants performance good, and wants that volume is little, compact conformation, is convenient to integrated and interconnected.Radio frequency low side major part has been used in Modern wireless communication, and therefore FCC has quite strict requirement to the use of low frequency end.This requires radio ultra wide band system to outside being with, and especially low-frequency range is had to good inhibition.So need a high performance ultra-wide band filter that bandwidth is strictly limited in the scope that FCC specifies.
But, current multisystem, the wireless communications mode of multi-modulation scheme also makes radio ultra wide band system must face more, more complicated problems, as wlan system 5.2GHz and 5.8GHz frequency range all drop in ultra broadband frequency band.Ultra-wide band filter when design, must consideration how to reduce and avoid and existing part system between interference.So the ultra-wide band filter with inhibition WLAN frequency range that therefore designs a compact conformation seems particularly important.
Utility model content
The purpose of this utility model is to provide a kind of simple in structure, volume is small and exquisite, the ultra-wide band filter with inhibition WLAN frequency range of broader bandwidth, bandwidth range is at 2.9～10.7GHz, covering ultra wideband frequency range completely, and on this basis, by loading two L shaped open circuit minor matters, realize trap function in WLAN frequency range, reduce the interference of WLAN signal.
The technical scheme that the utility model adopts:
A kind of compact conformation has the ultra-wide band filter that suppresses WLAN interference, it is characterized in that: comprise multimode resonator (1), transmission coupling line (2), L shaped short circuit minor matters (3), ground plane (4), medium substrate (5).Described multimode resonator, transmission coupling line, L shaped short circuit minor matters are all printed on medium substrate upper surface, and described ground plane is printed on the back side of medium substrate.
Described a kind of compact conformation has the ultra-wide band filter that suppresses WLAN interference, it is characterized in that having the microstrip structure of two L shaped short circuit minor matters, produces WLAN frequency range inhibition.
Described a kind of compact conformation has the ultra-wide band filter that suppresses WLAN interference, it is characterized in that two L shaped short circuit minor matters width, equal in length.
Described a kind of compact conformation has the ultra-wide band filter that suppresses WLAN interference, it is characterized in that, multimode resonator the latter half is rectangle, and the first half is semicircular structure.
Described a kind of compact conformation has the ultra-wide band filter that suppresses WLAN interference, it is characterized in that, rectangular channel is left in multimode resonator inside.
Concrete structure:
(1) multimode resonator the first half of the present utility model is semicircle, with transmission coupling line acting in conjunction Bandwidth, forms ultra broadband characteristic.
(2) the utility model, by adjusting the size of multimode resonator, can regulate the scope of passband at UWB (2.9-10.7GHz).
(3) the utility model, by adjusting multimode resonator inner rectangular groove size, can improve the squareness factor of passband 2.9-10.7GHz frequency range.
(4) the utility model, by adjusting the size of L shaped short circuit minor matters, can be realized the adjustment of trap frequency position.
Brief description of the drawings
Fig. 1 is front elevation of the present utility model;
Fig. 2 is end view of the present utility model;
Embodiment
Filter examples:
As shown in Figure 1, a kind of compact conformation has the ultra-wide band filter that suppresses WLAN interference, and its composition comprises: multimode resonator (1), transmission coupling line (2), L shaped short circuit minor matters (3), ground plane (4), medium substrate (5).Described multimode resonator, transmission coupling line, L shaped short circuit minor matters are all printed on medium substrate upper surface, and described ground plane is printed on the back side of medium substrate.
Described medium substrate is polytetrafluoroethylmaterial material, thickness 3mm, and relative dielectric constant is 2.2.
The wide of described transmission coupling line is 0.5mm, realizes good impedance matching effect.
Described multimode resonator is opened rectangular channel, and the first half is semicircle, forms multiple modes of resonance, can well Bandwidth, and covering ultra wideband frequency range.
Described L shaped short circuit minor matters structure and size all equate respectively.
The ultra-wide band filter that a kind of compact conformation has inhibition WLAN interference has well effect always.The impedance bandwidth of this filter standing-wave ratio (being less than or equal to 2:1) is 2.9-10.7GHz, meets the demand of ultra-wideband communications.Have a trap characteristic at WLAN (5～6GHz), can well suppress the interference of WLAN signal, have good interference free performance, trap characteristic is mainly contributed by two L shaped short circuit minor matters.
Claims (5)
1. a compact conformation has the ultra-wide band filter that suppresses WLAN interference, it is characterized in that: comprise multimode resonator (1), transmission coupling line (2), L shaped short circuit minor matters (3), ground plane (4), medium substrate (5), described multimode resonator, transmission coupling line, L shaped short circuit minor matters are all printed on medium substrate upper surface, and described ground plane is printed on the back side of medium substrate.
2. a kind of compact conformation has the ultra-wide band filter that suppresses WLAN interference according to claim 1, it is characterized in that having the microstrip structure of two L shaped short circuit minor matters, produces WLAN frequency range inhibition.
3. a kind of compact conformation according to claim 1 has the ultra-wide band filter that suppresses WLAN interference, it is characterized in that two L shaped short circuit minor matters width, equal in length.
4. a kind of compact conformation according to claim 1 has the ultra-wide band filter that suppresses WLAN interference, it is characterized in that, multimode resonator the latter half is rectangle, and the first half is semicircular structure.
5. a kind of compact conformation according to claim 1 has the ultra-wide band filter that suppresses WLAN interference, it is characterized in that, rectangular channel is left in multimode resonator inside, and the latter half is rectangle, and the first half is semicircular structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320764276.8U CN203760600U (en) | 2013-11-27 | 2013-11-27 | Ultra-wideband filter possessing compact structure and resisting WLAN interference |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320764276.8U CN203760600U (en) | 2013-11-27 | 2013-11-27 | Ultra-wideband filter possessing compact structure and resisting WLAN interference |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203760600U true CN203760600U (en) | 2014-08-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320764276.8U Expired - Fee Related CN203760600U (en) | 2013-11-27 | 2013-11-27 | Ultra-wideband filter possessing compact structure and resisting WLAN interference |
Country Status (1)
| Country | Link |
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| CN (1) | CN203760600U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104779424A (en) * | 2015-04-13 | 2015-07-15 | 南京邮电大学 | Microstrip dual-passband coupling filter |
| CN111490321A (en) * | 2020-03-05 | 2020-08-04 | 东北大学秦皇岛分校 | Broadband filter based on improved cross-shaped structure and design method |
| CN114976541A (en) * | 2022-06-14 | 2022-08-30 | 成都嘉晨科技有限公司 | Three-trapped wave ultra wide band-pass filter and electronic equipment capable of being positioned |
-
2013
- 2013-11-27 CN CN201320764276.8U patent/CN203760600U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104779424A (en) * | 2015-04-13 | 2015-07-15 | 南京邮电大学 | Microstrip dual-passband coupling filter |
| CN111490321A (en) * | 2020-03-05 | 2020-08-04 | 东北大学秦皇岛分校 | Broadband filter based on improved cross-shaped structure and design method |
| CN114976541A (en) * | 2022-06-14 | 2022-08-30 | 成都嘉晨科技有限公司 | Three-trapped wave ultra wide band-pass filter and electronic equipment capable of being positioned |
| CN114976541B (en) * | 2022-06-14 | 2024-02-09 | 成都嘉晨科技有限公司 | Three-notch ultra-wideband band-pass filter and positionable electronic equipment |
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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: 20140806 Termination date: 20151127 |