CN203932262U - Ultra-wide band filter based on SIR coupling - Google Patents
Ultra-wide band filter based on SIR coupling Download PDFInfo
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- CN203932262U CN203932262U CN201320764136.0U CN201320764136U CN203932262U CN 203932262 U CN203932262 U CN 203932262U CN 201320764136 U CN201320764136 U CN 201320764136U CN 203932262 U CN203932262 U CN 203932262U
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Abstract
The utility model discloses a kind of ultra-wide band filter based on SIR coupling with two trap characteristics, its composition comprises: medium substrate (1), resonator (2), transmission coupling line (3), open circuit minor matters (4), SIR structure (5), ground plane (6).Described resonator, transmission coupling line, open circuit minor matters, SIR structure are all printed on medium substrate upper surface, and described short circuit minor matters are positioned at resonator inside, and SIR structure is positioned at resonator top, and ground plane is printed on the medium substrate back side.The utility model compact conformation, compact size, by change open a way size and the position of minor matters and SIR structure, capable of regulating trap frequency, solves the problem in ultra-wideband communication system.
Description
Technical field
The utility model relates to a kind of filter, a kind of ultra-wide band filter based on SIR coupling of specific design, and realize on this basis the interference that suppresses WLAN, RFID frequency band signals.
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 has opened gate for the commercial applications of super-broadband tech product, 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 is used in Modern wireless communication, so 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 just need a high performance ultra-wide band filter that bandwidth is strictly limited in the scope of FCC regulation.
Yet, 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, 5.8GHz frequency range and RFID 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, the ultra-wide band filter that design has inhibition WLAN and a RFID signal becomes the focus of current research.Design is during ultra wide band bandpass filter, should consider how to reduce and avoid and WLAN and RFID communication system between interference problem.Ultra-wide band filter need have the wide bandwidth of 3.1GHz-10.6GHz, and Out-of-band rejection requires high, suppress the impact of WLAN and RFID interference signal, these factors make the design of ultra-wide band filter face great challenge, and the ultra-wide band filter with inhibition WLAN and RFID 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 based on SIR coupling of broader bandwidth, can be used in radio-frequency devices front end, reduces the interference that WLAN (wireless local area network) WLAN (5.15～5.825GHz) communicates by letter with RFID6.8GHz signal.
Technical scheme described in the utility model is:
A kind of novel ultra-wide band filter based on SIR coupling, it is characterized in that: comprise medium substrate (1), multimode resonator (2), transmission coupling line (3), open circuit minor matters (4), SIR structure (5), ground plane (6), described multimode resonator (2), transmission coupling line (3), SIR structure (5) are printed on medium substrate (1) surface, and described ground plane (6) is printed on the back side of medium substrate (1).
The described ultra-wide band filter based on SIR coupling, is characterized in that: multimode resonator (2) forms rectangular configuration by microstrip line, the hem width degree of multimode resonator is unequal, realizes ultra broadband function with the acting in conjunction of transmission coupling line (3).
The described ultra-wide band filter based on SIR coupling, is characterized in that: in multimode resonator (2) rectangular channel, load the open circuit minor matters (4) of 1/4th medium wavelength, realize the trap function of RFID frequency range.
The described ultra-wide band filter based on SIR coupling, is characterized in that: multimode resonator (2) top SIR structure is for loading dumb-bell shape, and the dumbbell size of the right and left is unequal, realizes the trap function in WLAN frequency.。
Concrete structure:
(1) the utility model is opened rectangular channel in resonator structure, with transmission coupling line acting in conjunction under, make filter covering frequence scope 3.1GHz～10.6GHz, reach ultra broadband effect.
(2) transmission coupling line of the present utility model adopts interdigital coupling, and the spacing between transmission coupling line has determined stiffness of coupling, determines the bandwidth of filter.
(3) the open circuit minor matters that load 1/4th medium wavelength in the rectangular channel of resonator structure described in the utility model, by the open a way adjusted size RFID trap frequency of minor matters of adjusting, realize ultra-wideband communications and disturb mutually the compatible communication for coordination of communication system.
(4) the dumb-bell shape SIR structure that loads above resonator described in the utility model, the size of carrying dumb-bell shape SIR structure by adjusting can be adjusted the trap frequency of WLAN.
(5) the utility model filter single layer printed circuit plate technique can realize, and simple and compact for structure, volume is small and exquisite, easy to process, and cost is low, is convenient to batch production.
Accompanying drawing explanation
Fig. 1 is front elevation of the present utility model;
Fig. 2 is side view of the present utility model;
Embodiment
Filter examples:
As shown in Figure 1, have the ultra-wide band filter based on SIR coupling of two trap characteristics, its composition comprises: medium substrate (1), multimode resonator (2), transmission coupling line (3), open circuit minor matters (4), SIR structure (5), ground plane (6).The humorous resonator of described multimode, transmission coupling line, open circuit minor matters, SIR structure are all printed on medium substrate upper surface, and described short circuit minor matters are positioned at multimode resonator inside, and SIR structure is positioned at multimode resonator top, and ground plane is printed on the medium substrate back side.
Described medium substrate is polytetrafluoroethylene material, thickness 3mm, and relative dielectric constant is 2.2.
Rectangular channel is opened in described multimode resonator inside, and loads open circuit minor matters in the inside of rectangular channel, suppresses RFID signal and disturbs.
Between described transmission coupling line, distance is 0.2mm, and length is 1/4th medium wavelength.
Described dumb-bell shape SIR structure, the dumbbell size on both sides is unequal, suppresses the interference of WLAN signal by multimode resonator coupling.
Ultra-wide band filter based on SIR coupling has well two trap characteristics.The impedance bandwidth of this filter can cover 3.1-10.6GHz, meets the demand of ultra-wideband communications, has a trap characteristic between 5.25-5.85GHz, suppresses the interference of WLAN signal.At 6.8GHz, also have a trap characteristic, can eliminate or reduce the electromagnetic interference of RFID signal to filter, two traps are mainly by open circuit minor matters and SIR structural contribution.
Claims (3)
1. a novel ultra-wide band filter based on SIR coupling, it is characterized in that: comprise medium substrate (1), multimode resonator (2), transmission coupling line (3), open circuit minor matters (4), SIR structure (5), ground plane (6), described multimode resonator (2), transmission coupling line (3), SIR structure (5) are printed on medium substrate (1) surface, and described ground plane (6) is printed on the back side of medium substrate (1); Multimode resonator (2) forms rectangular configuration by microstrip line, and the hem width degree of multimode resonator is unequal, realizes ultra broadband function with the acting in conjunction of transmission coupling line (3).
2. the ultra-wide band filter based on SIR coupling according to claim 1, is characterized in that: in multimode resonator (2) rectangular channel, load the open circuit minor matters (4) of 1/4th medium wavelength, realize the trap function of RFID frequency range.
3. the ultra-wide band filter based on SIR coupling according to claim 1, is characterized in that: multimode resonator (2) top SIR structure is for loading dumb-bell shape, and the size of the right and left is unequal, realizes the trap function in WLAN frequency.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320764136.0U CN203932262U (en) | 2013-11-27 | 2013-11-27 | Ultra-wide band filter based on SIR coupling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320764136.0U CN203932262U (en) | 2013-11-27 | 2013-11-27 | Ultra-wide band filter based on SIR coupling |
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| Publication Number | Publication Date |
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| CN203932262U true CN203932262U (en) | 2014-11-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201320764136.0U Expired - Fee Related CN203932262U (en) | 2013-11-27 | 2013-11-27 | Ultra-wide band filter based on SIR coupling |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104505562A (en) * | 2014-12-15 | 2015-04-08 | 电子科技大学 | Micro-strip ultra-wideband band pass filter with good band stop characteristic |
| CN105024122A (en) * | 2015-07-21 | 2015-11-04 | 天津大学 | Three-passband microstrip filter based on SIR structure |
| CN108258372A (en) * | 2018-01-15 | 2018-07-06 | 绍兴文理学院 | The method and comb filter of independent regulation and control comb filter frequency and bandwidth |
| CN113488752A (en) * | 2021-07-16 | 2021-10-08 | 辽宁工程技术大学 | Five-notch miniature ultra-wideband filter based on C-type resonator |
-
2013
- 2013-11-27 CN CN201320764136.0U patent/CN203932262U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104505562A (en) * | 2014-12-15 | 2015-04-08 | 电子科技大学 | Micro-strip ultra-wideband band pass filter with good band stop characteristic |
| CN104505562B (en) * | 2014-12-15 | 2017-08-04 | 电子科技大学 | Micro band superwide band bandpass filter with good stopband characteristic |
| CN105024122A (en) * | 2015-07-21 | 2015-11-04 | 天津大学 | Three-passband microstrip filter based on SIR structure |
| CN108258372A (en) * | 2018-01-15 | 2018-07-06 | 绍兴文理学院 | The method and comb filter of independent regulation and control comb filter frequency and bandwidth |
| CN113488752A (en) * | 2021-07-16 | 2021-10-08 | 辽宁工程技术大学 | Five-notch miniature ultra-wideband filter based on C-type resonator |
| CN113488752B (en) * | 2021-07-16 | 2022-05-10 | 辽宁工程技术大学 | Five-notch miniature ultra-wideband filter based on C-type resonator |
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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: 20141105 Termination date: 20151127 |