CN204538157U - The UWB filter of many stopbands is configured based on stepped impedance - Google Patents
The UWB filter of many stopbands is configured based on stepped impedance Download PDFInfo
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- CN204538157U CN204538157U CN201420818534.0U CN201420818534U CN204538157U CN 204538157 U CN204538157 U CN 204538157U CN 201420818534 U CN201420818534 U CN 201420818534U CN 204538157 U CN204538157 U CN 204538157U
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Abstract
The utility model discloses the UWB filter configuring many stopbands based on stepped impedance.This filter is by dielectric-slab upper surface multimode SIR (101), port microstrip line (102), microstrip transmission line (103), medium substrate (104), metal ground plate (105) composition under medium substrate.The utility model utilizes multimode SIR to realize the pass band width of UWB requirement, and the asymmetry of rectangular channel realizes many stopbands and stopband is adjustable.This design of filter is simple, compact conformation, easy to process, with low cost, many stopbands, stopband is adjustable.The filter that the utility model relates to has selectivity characteristic in good passband, and this selectivity is adjustable, can in a lot of passband of filtering other signals to the interference of UWB filter.
Description
Technical field
The utility model relates to a kind of UWB filter configuring many stopbands based on stepped impedance, this filter can in filtering UWB other frequency band signals interference and in UWB, there is many stopbands.
Background technology
UWB or wide-band microwave filter are that modern communication technology applies very basic part, and such as UWB, radar system, the fast development of this special dimension facilitates 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 may 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 to solve co-channel interference and become UWB research important content, the UWB filter therefore with many stopbands has very high practical value.
Occurred a lot of mentality of designing in recent years, as multimode resonator (MMR), cascade structure etc., although these structures can realize filter effect, but volume is large or selectivity is poor.So design has many stopbands can select signal in UWB better, the UWB filter of many stopbands has great importance.
Utility model content
The purpose of this utility model is to provide the UWB filter with many stopbands, and this filter can reduce the interference of other unwanted signals to UWB signal.
The technical scheme that the utility model adopts:
The UWB filter of many stopbands is configured based on stepped impedance, comprise and be formed at dielectric-slab upper surface multimode SIR (101), port microstrip line (102), it is characterized in that, affiliated multimode SIR comprises low-impedance line part (1011), two identical high impedance line part (1012), rectangular channels (1013).
The described UWB filter configuring many stopbands based on stepped impedance, is characterized in that, microstrip transmission line (103), and the upper and lower gap of high impedance line part that microstrip transmission line is identical with two is equal.
The described UWB filter configuring many stopbands based on stepped impedance, is characterized in that, port microstrip line (102), and port microstrip line is symmetrical up and down about transmission microstrip line.
The described UWB filter configuring many stopbands based on stepped impedance, it is characterized 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, can realize the characteristic that many stopbands are adjustable.
This utility model filter has following characteristic and advantage relative to existing filter:
Simplicity of design, compact conformation, easy to process, with low cost, many stopbands, stopband is adjustable.
By the size of adjustment rectangular channel (1013), the appearance of stopband can be regulated.
The length of adjustment microstrip transmission line (103), does not affect passband change.
Many stopbands can be realized.
Accompanying drawing explanation
Fig. 1 is the basic structure vertical view of the utility model embodiment 1;
Fig. 2 is the basic structure end view of the utility model embodiment 1;
Fig. 3 is the multimode SIR structure chart of the utility model embodiment 1;
Fig. 4 is port and the microstrip line johning knot composition of the utility model embodiment 1;
Fig. 5 is the analogous diagram of the utility model embodiment 1;
Embodiment
The utility model devises the UWB filter of many stopbands, many stopbands of this filter and stopband is adjustable, wide bandwidth.
Specifically utility model is described in more detail below in conjunction with accompanying drawing:
An example of the present utility model as shown in Figure 2, medium substrate (104) to be dielectric constant be 4.4 FR4_epoxy.The specification of the size conforms microminiaturization of medium substrate, 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 shown in Figure 1, the UWB filter configuring many stopbands based on stepped impedance of the present utility model, 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 filter configuring many stopbands based on stepped impedance of the present utility model, its multimode SIR comprises low-impedance line part (1011), two identical high impedance line part (1012), rectangular channels (1013), described low-impedance line part (1011), two identical high impedance line parts (1012) up and down size are that full symmetric, rectangular channel (1013) both sides are asymmetric, the gap of microstrip line and high impedance line part (1012) is fixed, and realizes ultrabroad band characteristic by multimode SIR.
As shown in Figure 3, the utility model many stopbands UWB filter adopts the structure of rectangular channel to realize many stopbands.
As shown in Figure 4, the utility model many stopbands UWB filter adopts microstrip line to realize transmission coupling, and microstrip transmission line (103) has identical width with high impedance line part (1012).
As shown in Figure 5, there is repeatedly trap and stopband in the utility model many stopbands UWB filter in ultra broadband.
The design parameter of this utility model many stopband UWB filter:
The selection of medium substrate: dielectric constant is the FR4_epoxy of 4.4.The dielectric loss of medium substrate is 0.02, ensure that loss is less; The length and width of medium substrate (104) is respectively 6mm, 33.8mm, and 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 filter correlation theory, design meets the resonant element of ultra-wideband communications.The length and width of low-impedance line part (1011) is respectively 10mm, 2.2mm, the length and width of two identical high impedance line parts (1012) is respectively 5mm, 0.4mm, 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) has identical width with high impedance line part (1012), width is 0.4mm.
Claims (4)
1. the UWB filter of many stopbands is configured based on stepped impedance, comprise and be formed at dielectric-slab upper surface multimode SIR (101), port microstrip line (102), affiliated multimode SIR comprises low-impedance line part (1011), two identical high impedance line part (1012), rectangular channels (1013).
2. the UWB filter configuring many stopbands based on stepped impedance novel according to claim 1, is characterized in that, microstrip transmission line (103), and the upper and lower gap of high impedance line part that microstrip transmission line is identical with two is equal.
3. the UWB filter configuring many stopbands based on stepped impedance novel according to claim 1, is characterized in that, port microstrip line (102), and port microstrip line is symmetrical up and down about transmission microstrip line.
4. the novel UWB filter configuring many stopbands based on stepped impedance according to claim 1, it is characterized in that, the adjustment of microstrip line length does not affect free transmission range; The Frequency point of the variable effect stopband appearance of rectangular channel length, can realize the feature that many stopbands are adjustable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420818534.0U CN204538157U (en) | 2014-12-21 | 2014-12-21 | The UWB filter of many stopbands is configured based on stepped impedance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420818534.0U CN204538157U (en) | 2014-12-21 | 2014-12-21 | The UWB filter of many stopbands is configured based on stepped impedance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204538157U true CN204538157U (en) | 2015-08-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420818534.0U Expired - Fee Related CN204538157U (en) | 2014-12-21 | 2014-12-21 | The UWB filter of many stopbands is configured based on stepped impedance |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107845849A (en) * | 2016-09-21 | 2018-03-27 | 中国计量大学 | Narrow band filter based on artificial surface plasma |
-
2014
- 2014-12-21 CN CN201420818534.0U patent/CN204538157U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107845849A (en) * | 2016-09-21 | 2018-03-27 | 中国计量大学 | Narrow band filter based on artificial surface plasma |
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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: 20150805 Termination date: 20151221 |
|
| EXPY | Termination of patent right or utility model |