CN105789782A - Novel compact type UWB band-pass filter with wave-trapping characteristic - Google Patents
Novel compact type UWB band-pass filter with wave-trapping characteristic Download PDFInfo
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- CN105789782A CN105789782A CN201410827619.XA CN201410827619A CN105789782A CN 105789782 A CN105789782 A CN 105789782A CN 201410827619 A CN201410827619 A CN 201410827619A CN 105789782 A CN105789782 A CN 105789782A
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- counterfoil
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Abstract
The invention discloses a novel compact type UWB band-pass filter with a wave-trapping characteristic. The filter comprises combined type transmission coupling lines (1), (3) and (8), an open-circuit-stub microstrip structure (2), short shunt stubs (5) and circular patches (6) with square grooves. The filter realizes the property of adjusting the trapped waves through the open-circuit-stub microstrip structure. The filter provided by the invention has a good wave-trapping characteristic; the trapped wave is about 5.8Ghz, so that the interference on the UWB filer from WLAN (wireless local area network) signals can be filtered; and meanwhile, the filter is simple in structure, compact in structure, convenient to process, low in cost, and capable of adjusting the trapped waves.
Description
Technical field
The present invention relates to a kind of novel compact UWB band filter with trap characteristic, this wave filter can filter the interference of WLAN signal in UWB.
Background technology
In February, 2002, FCC (FCC) ratifies 3.1-10.6GHz frequency range for business telecommunication, the Technology of Ultra has the advantages such as efficiency of transmission height & capacity of resisting disturbance is strong, becoming one of technology of great competitiveness in short-distance wireless communication, therefore UWB is widely used.Multimode resonance ultra-wide band filter is a kind of common ultra-wide band filter, and this kind of wave filter generally adopts microstrip structure, makes relatively easy, receives the concern of lot of domestic and foreign research worker.The open-circuited load multimode ultra-wide band filter that ZhuL et al. makes has good passband characteristic.Other kinds of ultra-wide band filter, such as co-planar waveguide/micro-strip, defect ground (DefectedGroundStructure, DGS), electromagnetism trough of belt (ElectromagneticBand Gap, etc. EBG) appearance of different structure, is all that the research of microwave band-pass filter creates great impetus.
WLAN (WirelessLocalAreaNetwork, or Wireless Fidelity (WirelessFidelity WLAN), WiFi) wireless communications application technology widely is had become as, the working frequency range of its regulation comprises two frequency ranges of 5.2GHz and 5.8GHz, owing to the two frequency range is all in ultra wideband frequency, radio ultra wide band system can be formed interference by this, how solving co-channel interference and become UWB research important content, ultra broadband device is usually takes trap mode to eliminate its impact.Occur in that some mentalities of designing in recent years, such as multimode resonator (MMR), via structure etc., although but these structures can realize trap effect, but trap is non-adjustable.Or introducing difference refers to the line of rabbet joint, it is achieved double; two trap characteristics, although trap is adjustable, but the passband of broadband filter is non-adjustable.So design to have passband adjustable, adjustable pair of trap UWB wave filter of trap has great importance.
Summary of the invention
It is an object of the invention to provide 5～6GHz frequency band and have the UWB wave filter of trap characteristic, this wave filter can mask this frequency range of 5～6GHz, eliminates the WLAN signal interference to UWB signal.
The technical solution adopted in the present invention:
A kind of novel compact UWB band filter with trap characteristic, including the combined transmission coupling line (1) being formed at dielectric-slab upper surface, (3), (8), the open circuit microstrip structure (2) of counterfoil, short shunting counterfoil (5), circular patch (6) with square groove, the microstrip structure (2) of affiliated open circuit counterfoil includes rectangle and loads counterfoil (4), (7).
Described a kind of novel compact UWB band filter with trap characteristic, it is characterised in that having the transmission coupling line (3) of L-type groove, the microstrip structure (2) of open circuit counterfoil produces trap characteristic；By regulating open circuit counterfoil length and width and gap, it is achieved trap is adjustable.
Described a kind of novel compact UWB band filter with trap characteristic, it is characterized in that, combined transmission coupling line (1), (2), (3) are open circuit toe structure, transmission coupling line (1), (2) width is equal, and equal with the gap between transmission coupling line (3), by adjusting the gap of combined transmission coupling line, change degree of coupling, produce the ultra broadband of 3.1-10.6GHz.
Described a kind of novel compact UWB band filter with trap characteristic, it is characterized in that, by adjusting the length and width of short shunting counterfoil (5) and the size of the circular patch (6) with square groove, it is achieved the good frequency band selection performance of designed wave filter.
Described a kind of novel compact UWB band filter with trap characteristic, it is characterized in that, transmission microstrip line (1), (2) adjustment of length, do not affect free transmission range, the adjustable non-interfering characteristic adjustable with trap of passband can be realized, it is achieved the compatibility of ultra-wideband communications and narrow-band communication system.
This invention wave filter has following characteristic and advantage relative to existing wave filter:
Design is simple, compact conformation, easy to process, with low cost, trap is adjustable.
By adjusting transmission coupling line (1), the gap of (2) and (3), it is possible to regulate the passband scope at UWB (3.1-10.6GHz).
By adjusting the transmission coupling line (3) of L-type groove, the microstrip structure (2) of open circuit counterfoil produces trap characteristic；By regulating open circuit counterfoil (4), the length and width of (7) and gap, it is achieved trap is adjustable.
Passband is adjustable adjustable with trap not to be interfere with each other.
Accompanying drawing explanation
Fig. 1 is the basic structure top view of the invention process example 1；
Fig. 2 is the basic structure side view of the invention process example 1；
Fig. 3 is the simulation result figure of the invention process example 1
Detailed description of the invention
The present invention devises the compact UWB band filter with trap characteristic, and wave filter trap is adjustable, passband is adjustable for this, and both adjustment are not interfere with each other.
Specifically invention is described in more detail below in conjunction with accompanying drawing:
An example of the present invention is as in figure 2 it is shown, medium substrate (9) is dielectric constant is the TaconicTLX-6 of 2.65.The thickness of this medium substrate is 1mm.
As shown in Figure 1, the compact UWB band filter with trap characteristic of the present invention, the combined transmission coupling line (1) of medium substrate upper surface, (3), (8), the open circuit microstrip structure (2) of counterfoil, short shunting counterfoil (5), circular patch (6) with square groove, adopt copper product.
As it is shown in figure 1, the compact UWB band filter with trap characteristic of the present invention, by the transmission coupling line (1) on medium substrate, (2), (3) intercouple and realize broadband character.
As it is shown in figure 1, the compact UWB band filter with trap characteristic of the present invention adopts the micro-strip (4) of two open circuit counterfoils, the transmission microstrip line (3) of (7) and L-type groove realizes trap characteristic.
The design parameter of the compact UWB band filter with trap characteristic of this invention:
According to wave filter correlation theory, design meets the toe structure resonance unit of ultra-wideband communications.The length and width of radius and short shunting counterfoil by adjusting square opening, adjust cut-off frequency, make involved wave filter have good low frequency characteristic.
Open circuit counterfoil microstrip structure design: according to micro-strip transmission theory, calculate resonant frequency, thus designing the dimension of microstrip line with two open counterfoils, produces trap characteristic, and the signal at elimination resonant frequency place, thus suppressing out of band signal.
Claims (5)
1. the compact UWB band filter with trap characteristic one kind novel, including the combined transmission coupling line (1) being formed at dielectric-slab upper surface, (3), (8), the open circuit microstrip structure (2) of counterfoil, short shunting counterfoil (5), circular patch (6) with square groove, the microstrip structure (2) of affiliated open circuit counterfoil includes rectangle and loads counterfoil (4), (7).
2. a kind of novel compact UWB band filter with trap characteristic according to claim 1, it is characterised in that having the transmission coupling line (3) of L-type groove, the microstrip structure (2) of open circuit counterfoil produces trap characteristic；By regulating open circuit counterfoil length and width and gap, it is achieved trap is adjustable.
3. a kind of novel compact UWB band filter with trap characteristic according to claim 1, it is characterized in that, combined transmission coupling line (1), (2), (3) are open circuit toe structure, transmission coupling line (1), (2) width is equal, and equal with the gap between transmission coupling line (3), by adjusting the gap of combined transmission coupling line, change degree of coupling, produce the ultra broadband of 3.1-10.6GHz.
4. a kind of novel compact UWB band filter with trap characteristic according to claim 1 and 2, it is characterized in that, by adjusting the length and width of short shunting counterfoil (5) and the size of the circular patch (6) with square groove, it is achieved the good frequency band selection performance of designed wave filter.
5. a kind of novel compact UWB band filter with trap characteristic according to claim 2 and 4, it is characterized in that, transmission microstrip line (1), (2) adjustment of length, do not affect free transmission range, the adjustable non-interfering characteristic adjustable with trap of passband can be realized, it is achieved the compatibility of ultra-wideband communications and narrow-band communication system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410827619.XA CN105789782A (en) | 2014-12-26 | 2014-12-26 | Novel compact type UWB band-pass filter with wave-trapping characteristic |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410827619.XA CN105789782A (en) | 2014-12-26 | 2014-12-26 | Novel compact type UWB band-pass filter with wave-trapping characteristic |
Publications (1)
| Publication Number | Publication Date |
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| CN105789782A true CN105789782A (en) | 2016-07-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410827619.XA Pending CN105789782A (en) | 2014-12-26 | 2014-12-26 | Novel compact type UWB band-pass filter with wave-trapping characteristic |
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Cited By (2)
| 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 |
| CN110380169A (en) * | 2019-06-27 | 2019-10-25 | 南京理工大学 | A kind of adjustable ultra-wide band filter of trap frequency with improvement band-stop response |
-
2014
- 2014-12-26 CN CN201410827619.XA patent/CN105789782A/en active Pending
Cited By (2)
| 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 |
| CN110380169A (en) * | 2019-06-27 | 2019-10-25 | 南京理工大学 | A kind of adjustable ultra-wide band filter of trap frequency with improvement band-stop response |
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| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160720 |
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| WD01 | Invention patent application deemed withdrawn after publication |