CN204375888U - The filter that dual-passband is adjustable - Google Patents
The filter that dual-passband is adjustable Download PDFInfo
- Publication number
- CN204375888U CN204375888U CN201420818479.5U CN201420818479U CN204375888U CN 204375888 U CN204375888 U CN 204375888U CN 201420818479 U CN201420818479 U CN 201420818479U CN 204375888 U CN204375888 U CN 204375888U
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- passband
- dual
- filter
- adjustable
- utility
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Abstract
The utility model discloses the filter that dual-passband is adjustable.This filter is by multimode resonant patch (101), port paster (102), microstrip transmission line (103), the medium substrate (104) of dielectric-slab upper surface symmetry, and the metal ground plate (105) under medium substrate forms.The utility model utilizes multimode resonant patch to realize the pass band width of UWB requirement, and U-type groove realizes dual-passband and dual-passband is adjustable.Project organization is simple, compact conformation reaches structure macro, easy to process, realizability is high, with low cost, two resistance passband, passband is adjustable.The filter that the utility model relates to has selectivity characteristic in good passband, and this selectivity is adjustable, can other signals useless in ultra-wide of filtering.
Description
Technical field
The utility model relates to dual-passband tunable filter, this filter occurs dual-passband in UWB and passband occurs adjustable, can meet application demand according to the appearance of the different adjustment dual-passband of application at any time, dual-passband tunable filter has important using value in wireless communication technology and radar system.
Background technology
Pass filter can allow the signal in passband well pass through, and the signal beyond filtering passband realizes the selectivity characteristic of pass filter.But along with the development of modern communication technology, some application needs to require that the signal in two different frequency ranges occurs simultaneously simultaneously, this just requires that filter realizes selecting the signal in two frequency ranges, so dual-passband tunable filter just has very large use value simultaneously.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 such as WiMAX (3.3-3.6GHz)), the interference of the signal such as WLAN (5.15-5.825GHz), RFID (6.8GHz).How to solve co-channel interference and become UWB research important content, therefore dual-passband tunable filter can select different signals, the unwanted signal of filtering simultaneously according to the concrete practical appearance point of dual-passband that regulates.So the application of dual-passband tunable filter in modern communication technology field and radar system 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 dual-passband tunable filter can select signal in UWB better and the simultaneously appearance of passband is adjustable, dual-passband tunable filter has great importance.
Utility model content
The purpose of this utility model is to provide has dual-passband tunable filter, this filter can the unwanted signal such as filtering WLAN signal or RFID to the interference of UWB signal, simultaneously select need the signal in frequency range to meet the requirement of the communication technology.
The technical scheme that the utility model adopts:
Dual-passband tunable filter, comprise the multimode resonant patch (101), the port paster (102) that are formed at dielectric-slab upper surface symmetry, the multimode resonant patch of affiliated symmetry comprises paster (1011), paster (1012), U-type groove (1013).
Described dual-passband tunable filter, is characterized in that, microstrip transmission line (103), and microstrip transmission line and paster (1012) are up and down apart from equal and width is identical.
Described dual-passband tunable filter, is characterized in that, port microstrip line (102), and port microstrip line is symmetrical up and down about transmission microstrip line.
This utility model filter has following characteristic and advantage relative to existing filter:
Project organization is simple, compact conformation reaches structure macro, easy to process, realizability is high, with low cost, two resistance passband, passband is adjustable.
By adjustment U-type groove (1013) position, length, width, the appearance of stopband can be regulated thus realize different dual-passband.
The length of adjustment microstrip transmission line (103), does not affect the realization of ultra broadband.
Can dual-passband be realized, passband is adjustable.
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 resonant patch 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;
Embodiment
The utility model devises dual-passband tunable filter, and this filter realizes dual-passband in ultra wide band range, and the appearance position of dual-passband is adjustable, can select the signal in certain required frequency range at any time, have very high use value.
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 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, dual-passband tunable filter of the present utility model, the multimode resonant patch (101) on medium substrate, port paster (102), microstrip transmission line (103), adopt copper product, economy is environmental protection again.
As shown in Figure 3, dual-passband tunable filter of the present utility model, its multimode resonant patch comprises paster (1011), paster (1012), U-type groove (1013), described paster (1011), paster (1012), upper and lower two of U-type groove (1013) is symmetrical, microstrip line is fixed with the gap of paster (1012) and the upper and lower gap of microstrip line is equal, multimode resonant patch realizes the appearance of ultra broadband, U-type groove realizes the appearance of dual-passband and the adjustment of U-type groove realizes the point that dual-passband occurs, this point can adjust according to concrete real requirement.
As shown in Figure 3, the appearance of dual-passband can be adjusted the while that the utility model dual-passband tunable filter adopting the structure of U-type groove to realize dual-passband.
As shown in Figure 4, filtering that the utility model dual-passband is adjustable adopts microstrip line to realize transmission coupling, and microstrip transmission line (103) has identical width with paster (1012) and upper and lower apart from equal.
The design parameter of the adjustable filtering of this utility model dual-passband:
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 of M1, M2 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 resonant patch: according to filter correlation theory, design meets the resonant element of ultra-wideband communications.The length and width of paster (1011) is respectively 10mm, 2.2mm, and the length and width of paster (1012) is respectively 5mm, 0.4mm, and the gap length of microstrip line and paster (1012) is 0.1mm.
Microstrip design: microstrip transmission line (103) has identical width with paster (1012), width is 0.4mm.
Claims (3)
1. the filter that dual-passband is adjustable, comprise the multimode resonant patch (101), the port paster (102) that are formed at dielectric-slab upper surface symmetry, the multimode resonant patch of affiliated symmetry comprises paster (1011), paster (1012), U-type groove (1013).
2. the filter that dual-passband is adjustable according to claim 1, is characterized in that, microstrip transmission line (103), and microstrip transmission line and paster (1012) are up and down apart from equal and width is identical.
3. the filter that dual-passband is adjustable 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420818479.5U CN204375888U (en) | 2014-12-21 | 2014-12-21 | The filter that dual-passband is adjustable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420818479.5U CN204375888U (en) | 2014-12-21 | 2014-12-21 | The filter that dual-passband is adjustable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204375888U true CN204375888U (en) | 2015-06-03 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420818479.5U Expired - Fee Related CN204375888U (en) | 2014-12-21 | 2014-12-21 | The filter that dual-passband is adjustable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204375888U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105024122A (en) * | 2015-07-21 | 2015-11-04 | 天津大学 | Three-passband microstrip filter based on SIR structure |
-
2014
- 2014-12-21 CN CN201420818479.5U patent/CN204375888U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105024122A (en) * | 2015-07-21 | 2015-11-04 | 天津大学 | Three-passband microstrip filter based on SIR structure |
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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: 20150603 Termination date: 20151221 |
|
| EXPY | Termination of patent right or utility model |