CN105762464A - Stepped impedance based UWB filter equipped with multiple attenuation bands - Google Patents
Stepped impedance based UWB filter equipped with multiple attenuation bands Download PDFInfo
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- CN105762464A CN105762464A CN201410799079.9A CN201410799079A CN105762464A CN 105762464 A CN105762464 A CN 105762464A CN 201410799079 A CN201410799079 A CN 201410799079A CN 105762464 A CN105762464 A CN 105762464A
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- uwb
- wave filter
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- stepped impedance
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Abstract
The invention discloses a stepped impedance based UWB filter equipped with multiple attenuation bands. The filter is composed of multimode SIRs (101) disposed on the upper surface of a medium substrate, port micro-strip lines (102), micro-strip transmission lines (103), the medium substrate (104) and a metal grounding board (105) below the medium substrate. According to the invention, the multimode SIRs are utilized for realizing pass band width required by UWB and the asymmetry of rectangular grooves is utilized for realizing the multiple attenuation bands and the adjustability of the attenuation band number. The filter provided by the invention is simple and compact in structure, small in size, convenient for processing, high in implementability, low in cost, multiple in attenuation bands and adjustable in attenuation band number. The filter provided by the invention has in-pass band selection features and the selectivity is adjustable. Interference on the UWB filter by other signals in a plurality of pass bands can be removed through filtration.
Description
Technical field
The present invention relates to a kind of UWB wave filter configuring many stopbands based on stepped impedance, this wave filter can filter the interference of other frequency band signals in UWB and occur many stopbands in UWB.
Background technology
UWB or wide-band microwave wave filter are the ingredients that modern communication technology application is very basic, for instance UWB, radar system, the fast development of this special dimension has promoted the development of various ultra-wide band filter.In February, 2002, FCC (FCC) ratifies 3.1-10.6GHz frequency range for business telecommunication, and therefore UWB is widely used.But, in the commercial scope of FCC definition, UWB signal is likely to be subject to the interference of the signals such as such as WiMAX (3.3-3.6GHz), WLAN (5.15-5.825GHz), RFID (6.8GHz).How solving co-channel interference and become UWB research important content, the UWB wave filter therefore with many stopbands has significantly high practical value.
Occur in that a lot of mentality of designing in recent years, such as multimode resonator (MMR), cascade structure etc., although but these structures can realize filter effect, but volume is big or selects poor performance.So design has many stopbands and can select signal in UWB better, the UWB wave filter of many stopbands has great importance.
Summary of the invention
It is an object of the invention to provide the UWB wave filter with many stopbands, this wave filter can reduce the interference to UWB signal of other garbage signals.
The technical solution adopted in the present invention:
The UWB wave filter of many stopbands is configured based on stepped impedance, including being formed at dielectric-slab upper surface multimode SIR (101), port microstrip line (102), it is characterized in that, affiliated multimode SIR includes low-impedance line part (1011), two identical high impedances line part (1012), rectangular channels (1013).
The UWB wave filter configuring many stopbands based on stepped impedance of described invention, it is characterised in that microstrip transmission line (103), microstrip transmission line and two identical upper and lower gaps of high impedance line part are equal.
The UWB wave filter configuring many stopbands based on stepped impedance of described invention, it is characterised in that port microstrip line (102), port microstrip line is symmetrical above and below about transmission microstrip line.
The UWB wave filter configuring many stopbands based on stepped impedance of described invention, it is characterised in that the adjustment of microstrip line length, does not affect free transmission range；The change of rectangular channel length and width, affects the Frequency point that stopband occurs, it may be achieved the adjustable characteristic of many stopbands.
This invention wave filter has following characteristic and advantage relative to existing wave filter:
Design is simple, compact conformation, stopband easy to process, with low cost, many, stopband is adjustable.
By adjusting the size of rectangular channel (1013), it is possible to regulate the appearance of stopband.
Adjust the length of microstrip transmission line (103), do not affect passband change.
Many stopbands can be realized.
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 multimode SIR structure chart of the invention process example 1；
Fig. 4 is port and the microstrip line attachment structure figure of the invention process example 1；
Fig. 5 is the analogous diagram of the invention process example 1；
Detailed description of the invention
The present invention devises the UWB wave filter of many stopbands, and the many stopbands of this wave filter and stopband are adjustable, wide bandwidth.
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 (104) is dielectric constant is the FR4_epoxy of 4.4.The size of medium substrate meets the specification of microminiaturization, and the thickness of this medium substrate is 1.59mm, and dielectric loss is 0.02.Metal ground plate (105) under medium substrate adopts copper product.
As it is shown in figure 1, the UWB wave filter configuring many stopbands based on stepped impedance of the present invention, the multimode SIR (101) on medium substrate, port microstrip line (102), microstrip transmission line (103), adopt copper product.
As shown in Figure 3, the UWB wave filter configuring many stopbands based on stepped impedance of the present invention, its multimode SIR includes low-impedance line part (1011), two identical high impedances line part (1012), rectangular channels (1013), described low-impedance line part (1011), two identical high impedances line part (1012) size up and down be full symmetric, rectangular channel (1013) both sides are asymmetric, the gap of microstrip line and high impedance line part (1012) is fixed, multimode SIR realize ultrabroad band characteristic.
As it is shown on figure 3, the structure that the present invention many stopbands UWB wave filter adopts rectangular channel realizes many stopbands.
As shown in Figure 4, the present invention many stopbands UWB wave filter adopts microstrip line to realize transmission coupling, and microstrip transmission line (103) and high impedance line part (1012) have identical width.
As it is shown in figure 5, there is repeatedly trap and stopband in ultra broadband in the present invention many stopbands UWB wave filter.
The design parameter of this invention many stopbands UWB wave filter:
The selection of medium substrate: dielectric constant is the FR4_epoxy of 4.4.The dielectric loss of medium substrate is 0.02, it is ensured that loss is less；Length and width respectively 6mm, 33.8mm of medium substrate (104), the thickness of this medium substrate is that 1.59mm meets required intensity.Multimode SIR on medium substrate and the metal ground plate under medium substrate all adopt copper product.
The design of multimode SIR: according to wave filter correlation theory, design meets the resonant element of ultra-wideband communications.Length and width respectively 10mm, 2.2mm of low-impedance line part (1011), length and width respectively 5mm, 0.4mm of two identical high impedances line part (1012), the size both sides of rectangular channel (1013) are asymmetric, and can to realize stopband by adjustment adjustable, and the gap of microstrip line and high impedance line part (1012) is 0.1mm.
Microstrip design: microstrip transmission line (103) and high impedance line part (1012) have identical width, and width is 0.4mm.
Claims (4)
1. the UWB wave filter of many stopbands is configured based on stepped impedance, including being formed at dielectric-slab upper surface multimode SIR (101), port microstrip line (102), affiliated multimode SIR includes low-impedance line part (1011), two identical high impedances line part (1012), rectangular channels (1013).
2. the UWB wave filter configuring many stopbands based on stepped impedance invented according to claim 1, it is characterised in that microstrip transmission line (103), microstrip transmission line and two identical upper and lower gaps of high impedance line part are equal.
3. the UWB wave filter configuring many stopbands based on stepped impedance invented according to claim 1, it is characterised in that port microstrip line (102), port microstrip line is symmetrical above and below about transmission microstrip line.
4. the UWB wave filter configuring many stopbands based on stepped impedance of invention described in, it is characterised in that the adjustment of microstrip line length, does not affect free transmission range；The change of rectangular channel length and width, affects the Frequency point that stopband occurs, it may be achieved the adjustable characteristic of many stopbands.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410799079.9A CN105762464A (en) | 2014-12-20 | 2014-12-20 | Stepped impedance based UWB filter equipped with multiple attenuation bands |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410799079.9A CN105762464A (en) | 2014-12-20 | 2014-12-20 | Stepped impedance based UWB filter equipped with multiple attenuation bands |
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| Publication Number | Publication Date |
|---|---|
| CN105762464A true CN105762464A (en) | 2016-07-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410799079.9A Pending CN105762464A (en) | 2014-12-20 | 2014-12-20 | Stepped impedance based UWB filter equipped with multiple attenuation bands |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106656090A (en) * | 2016-12-21 | 2017-05-10 | 中国科学院微电子研究所 | On-chip filter circuit and an on-chip filter chip |
-
2014
- 2014-12-20 CN CN201410799079.9A patent/CN105762464A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106656090A (en) * | 2016-12-21 | 2017-05-10 | 中国科学院微电子研究所 | On-chip filter circuit and an on-chip filter chip |
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| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160713 |
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| WD01 | Invention patent application deemed withdrawn after publication |