CN106159392A - The different double-passband filter of bandwidth - Google Patents
The different double-passband filter of bandwidth Download PDFInfo
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- CN106159392A CN106159392A CN201410799078.4A CN201410799078A CN106159392A CN 106159392 A CN106159392 A CN 106159392A CN 201410799078 A CN201410799078 A CN 201410799078A CN 106159392 A CN106159392 A CN 106159392A
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- bandwidth
- passband
- filter
- patch
- different double
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Abstract
The invention discloses the different double-passband filter of bandwidth.This wave filter is made up of the metal ground plate (105) under dielectric-slab upper surface resonant patch (101), resonant patch (102), microstrip transmission line (103), port paster (104) medium substrate (105), medium substrate.The present invention utilizes multimode resonant patch to realize different 2.5GHZ-3.5GHZ, 4.5GHZ-11.2GHZ dual-passband of bandwidth.Design simple in construction, compact conformation reaches structure macro, easy to process, realizability is high, with low cost, dual-passband.
Description
Technical field
The present invention relates to the different double-passband filter of bandwidth, this wave filter is at 2.5GHZ-3.5GHZ, 4.5GHZ-11.2GHZ
In the range of be two passbands, a narrow band signal and a broadband signal can be selected in the passband that the two differs completely simultaneously,
This is significant in terms of wireless communication technology.
Background technology
General bandpass filter can only select a frequency range in signal, however as the development of wireless communication technology,
Needing the signal in two or more band limits, this requires that wave filter can select multiple signal simultaneously.Pass filter
Can allow the signal in passband well by, filter the signal beyond passband, it is achieved the selectivity characteristic of pass filter.But
With the development of modern communication technology, some application need to require that the signal in two different frequency ranges occurs simultaneously simultaneously, this
Require that wave filter realizes selecting the signal in two frequency ranges simultaneously, so the different double-passband filter of bandwidth has very big
Use value.UWB or wide-band microwave wave filter are the very basic parts of modern communication technology application, for example
UWB, radar system, the fast development of this special dimension promotes the development of various ultra-wide band filter.In February, 2002,
FCC (FCC) approval 3.1-10.6GHz frequency range is used for business telecommunication, and therefore UWB obtains widely should
With.But, in the range of the commercialization of FCC definition, UWB signal may be subject to such as WiMAX (3.3-3.6GHz), WLAN
(5.15-5.825GHz), the interference of the signals such as RFID (6.8GHz).How to solve co-channel interference become UWB research important
Content, therefore the different double-passband filter of bandwidth can select the signal in required frequency range according to concrete practicality, filters simultaneously
Except unwanted signal.So the application that the different double-passband filter of bandwidth is in terms of modern communication technology field and radar system
There is very 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
Filter effect can be realized, but volume is big or can only select single-pass band.So design has the different double-passband filter energy of bandwidth
Signal in two different frequency ranges of enough preferably selections.
Content of the invention
It is an object of the invention to provide and have the different double-passband filter of bandwidth, this wave filter can select WLAN to believe
Number or the signal of the needs such as RFID, filter the signal not needing frequency range to meet the requirement of the communication technology simultaneously.
The technical solution adopted in the present invention:
The different double-passband filter of bandwidth, including be formed at the resonant patch (101) of dielectric-slab upper surface, resonant patch
(102), described resonant patch (101) includes: rectangular patch (1011), circular patch (1012).
The different double-passband filter of the bandwidth of described invention, it is characterised in that microstrip transmission line (103), microstrip transmission line
With resonant patch (102) up and down apart from equal and width is identical.
The different double-passband filter of the bandwidth of described invention, it is characterised in that port paster (104), two port pasters
Identical.
The different double-passband filter of the bandwidth of described invention, it is characterised in that multimode is humorous
This invention wave filter has a following characteristic and advantage relative to existing wave filter:
Design simple in construction, compact conformation reaches structure macro, easy to process, realizability is high, with low cost, dual-passband.
The bandwidth difference of dual-passband is very big, arrowband, a broadband.
Adjusting the length of microstrip transmission line (103), the scope of passband does not changes.
Dual-passband can be realized.
Brief description
Fig. 1 is the basic structure top view of embodiment 1 of the present invention；
Fig. 2 is the basic structure side view of embodiment 1 of the present invention；
Fig. 3 is the multimode resonant patch structure chart of embodiment 1 of the present invention；
Fig. 4 is port and the microstrip line attachment structure figure of embodiment 1 of the present invention；
Fig. 5 is the analogous diagram of embodiment 1 of the present invention；
Detailed description of the invention
The present invention devises the different double-passband filter of bandwidth, and this wave filter selects signal, passband at different frequency band ranges
It is respectively 2.5GHZ-3.5GHZ, 4.5GHZ-11.2GHZ, the signal that WLAN signal or RFID etc. need can be selected,
There is very high use value.
Specifically invention is described in more detail below in conjunction with the accompanying drawings:
An example of the present invention is as in figure 2 it is shown, medium substrate (105) is the FR4_epoxy that dielectric constant is 4.4.It is situated between
The length and width of matter substrate meet the requirement of miniaturization, and the thickness of this medium substrate is 1.59mm, and dielectric loss is 0.02.Medium substrate
Under metal ground plate (106) use copper product.
As it is shown in figure 1, the double-passband filter that the bandwidth of the present invention is different, multimode resonant patch (101) on medium substrate,
Resonant patch (102), microstrip transmission line (103), port paster (104), use copper product, economy environmental protection again.
As it is shown on figure 3, the double-passband filter that the bandwidth of the present invention is different, its multimode resonant patch includes rectangular patch
(1011), circular patch (1012), resonant patch (102), microstrip transmission line (103), microstrip transmission line (103) and patch
The gap of piece (102) is fixed, and the length of microstrip line can suitably adjust, but length directly affects the macro of structure.
As it is shown on figure 3, two pasters that the different double-passband filter of bandwidth of the present invention uses up-down structure different realize bilateral
Band, and dual-passband bandwidth is different.
As shown in Figure 4, the different double-passband filter of bandwidth of the present invention uses microstrip line to realize transmission coupling, microstrip transmission line
(103) there is identical width with paster (102) and up and down apart from equal.
As it is shown in figure 5, dual-passband produced by the different double-passband filter of bandwidth of the present invention is respectively
2.5GHZ-3.5GHZ, 4.5GHZ-11.2GHZ, the realizability of this design is described.
The design parameter of the different double-passband filter of this invention bandwidth:
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；The length and width of medium substrate (104) is respectively 6mm, 33.8mm, and the thickness of this medium substrate is 1.59mm
Meet required intensity.Multimode resonant patch on medium substrate and the metal ground plate under medium substrate all use copper product.
The design of multimode resonant patch: according to wave filter correlation theory, design meets the resonant element of ultra-wideband communications.Paster
(102) length and width is respectively 15mm, 0.4mm, and the length and width of rectangular patch (1011) is respectively 1mm, 0.1mm, circle
The radius of shape paster (1012) is 0.2mm, and microstrip line is 0.1mm with the gap of paster (102).
Microstrip design: microstrip transmission line (103) and paster (102) have identical width, and width is 0.4mm.
Claims (3)
1. the different double-passband filter of bandwidth, including be formed at the resonant patch (101) of dielectric-slab upper surface, resonant patch (102),
Described resonant patch (101) includes: rectangular patch (1011), circular patch (1012).
2. the different double-passband filter of the bandwidth invented according to claim 1, it is characterised in that microstrip transmission line (103),
Microstrip transmission line and resonant patch (102) are up and down apart from equal and width is identical.
3. the different double-passband filter of the bandwidth invented according to claim 1, it is characterised in that port paster (104), two
Individual port paster is identical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410799078.4A CN106159392A (en) | 2015-04-05 | 2015-04-05 | The different double-passband filter of bandwidth |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410799078.4A CN106159392A (en) | 2015-04-05 | 2015-04-05 | The different double-passband filter of bandwidth |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106159392A true CN106159392A (en) | 2016-11-23 |
Family
ID=58064349
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410799078.4A Pending CN106159392A (en) | 2015-04-05 | 2015-04-05 | The different double-passband filter of bandwidth |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106159392A (en) |
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2015
- 2015-04-05 CN CN201410799078.4A patent/CN106159392A/en active Pending
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20161123 |