CN105789748A - Ultra-wideband pass filter based on symmetric ring - Google Patents
Ultra-wideband pass filter based on symmetric ring Download PDFInfo
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- CN105789748A CN105789748A CN201410802396.1A CN201410802396A CN105789748A CN 105789748 A CN105789748 A CN 105789748A CN 201410802396 A CN201410802396 A CN 201410802396A CN 105789748 A CN105789748 A CN 105789748A
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Abstract
The invention discloses an ultra-wideband pass filter based on a symmetric ring. The filter is formed by multimode resonance patches (101), port patches (102) and micro-strip transmission lines (103) which are mutually symmetrical on the upper surface of a dielectric substrate, the dielectric substrate (104) and a metal earth plate (105) under the dielectric substrate. The ultra-wideband pass filter utilizes the multimode resonance patches to realize the filter having a wider passband width than the UWB requirement, and multi-mode and modulus adjustment can be realized through a ring groove. The ultra-wideband pass filter has the advantages of simple design structure, compact structure to realize structure micronization, convenience for processing, high realizability, low cost, ultra-wide bandwidth and adjustable modulus. The filter in the invention has good selection characteristic within passband, the selectivity is better, more signals can be selected to pass, and the practical value is high.
Description
Technical field
The present invention relates to the ultra wide band bandpass filter based on symmetrical annulus, there is multimode in UWB in this wave filter, bandpass is realized in UWB, can well selecting the signal in ultra broadband, ultra broadband (UWB) band filter has important practical value in wireless communication technology and radar system and ultra broadband location.
Background technology
Band filter can allow the signal in passband well pass through, and filters the signal beyond passband and well realizes the selectivity characteristic of band filter.But being as the development of modern communication technology, the bandwidth of required signal is more and more wider, now that the requirement of ultra broadband is more and more higher, so the ultra wide band bandpass filter based on symmetrical annulus just has significantly high practical value.UWB or wide-band microwave wave filter are the ingredients that modern communication technology application is very basic, for instance UWB, radar system, alignment system, wireless communication technology, 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, some technology require beyond 3.1-10.6GHz frequency range, the shortcoming that now compensate for narrow bandwidth based on the ultra wide band bandpass filter this respect of symmetrical annulus, significantly broaden bandwidth, allow more signal can pass through wave filter, in addition there is multimode in passband in this ultra broadband (UWB) band filter, has higher practical value in wireless communication technology.Development along with integrated communication system, modern electronic product is more and more higher for microminiaturized requirement, the studied person's extensive use of undersized technology is subtracted so various, ultra broadband (UWB) band filter is achieved that structure macro, has reached to subtract undersized target referring now to former cascade structure.
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 or limited bandwidth.So design has the ultra wide band bandpass filter based on symmetrical annulus and can select in UWB signal better and better select except the signal on UWB both sides simultaneously, better realizing the selectivity of ultra broadband, the ultra wide band bandpass filter based on symmetrical annulus has great importance.
Summary of the invention
It is an object of the invention to provide the ultra wide band bandpass filter with symmetrical annulus, this wave filter can better select the signal in ultra broadband meanwhile can select than the broader signal of ultra broadband and occur multimode in passband, the little target reaching microminiaturization of size, has significantly high using value to wireless communication technology, radar system, alignment system.
The technical solution adopted in the present invention:
Based on the ultra wide band bandpass filter of symmetrical annulus, including medium substrate (104), metal ground plane (105), the multimode resonant patch (101) of dielectric-slab upper surface, port paster (102), microstrip transmission line (103).
The described ultra wide band bandpass filter based on symmetrical annulus, it is characterised in that affiliated multimode resonant patch includes paster (1011), rectangular patch (1012), annulus (1013).
The described ultra wide band bandpass filter based on symmetrical annulus, it is characterised in that microstrip transmission line (103), microstrip transmission line is upper and lower with rectangular patch (1012) apart from equal and width is identical.
The described ultra wide band bandpass filter based on symmetrical annulus, it is characterised in that port paster (102), port paster is symmetrical above and below about transmission microstrip line.
This invention wave filter has 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, ultra broadband, multimode phenomenon.
The modulus occurred in passband by adjusting the change of the size of annulus (1013) to change.
Adjust the length of microstrip transmission line (103), do not affect the realization of ultra broadband.
Ultra broadband, multimode 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 resonant patch 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；
Detailed description of the invention
The present invention devises the ultra wide band bandpass filter based on symmetrical annulus, and this wave filter can produce more broader broadband than ultra broadband, and occurs multimode in passband, and simple in construction, size are little achieves microminiaturization.
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 length and width requirement up to specification 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 it is shown in figure 1, the ultra wide band bandpass filter based on symmetrical annulus of the present invention, the multimode resonant patch (101) on medium substrate, port paster (102), microstrip transmission line (103), adopting copper product, economy is environmental protection again.
As shown in Figure 3, the ultra wide band bandpass filter based on symmetrical annulus of the present invention, its multimode resonant patch includes paster (1011), rectangular patch (1012), annulus (1013), described paster (1011), paster (1012) size be all consistent with impedance matching, the gap that gap is fixed and microstrip line is upper and lower of microstrip line and paster (1012) is equal, and multimode resonant patch realizes the appearance of ultra broadband.
As it is shown on figure 3, the ultra wide band bandpass filter based on symmetrical annulus of the present invention adopts the structure of annular groove to realize the appearance of multimode in passband.
As shown in Figure 4, the present invention adopts microstrip line to realize transmission coupling based on the ultra wide band bandpass filter of symmetrical annulus, and microstrip transmission line (103) has identical width and up and down apart from equal with paster (1012).
The design parameter of this adjustable filtering of invention ultra broadband:
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 9mm, 33.8mm of medium substrate (104), the thickness of this medium substrate is that 1.59mm meets required intensity.Multimode resonant patch on medium substrate and the metal ground plate under medium substrate all adopt copper product, economic and practical and environmental protection.
The design of multimode resonant patch: according to wave filter correlation theory, design meets the resonant element of ultra-wideband communications., length and width respectively 5mm, 0.4mm of paster (1012), the gap length of microstrip line and paster (1012) is 0.1mm.
Microstrip design: microstrip transmission line (103) and paster (1012) have identical width, and width is 0.4mm.
Claims (4)
1. based on the ultra wide band bandpass filter of symmetrical annulus, including medium substrate (104), metal ground plane (105), the multimode resonant patch (101) of dielectric-slab upper surface, port paster (102), microstrip transmission line (103).
2. according to claim 1 based on the ultra wide band bandpass filter of symmetrical annulus, it is characterised in that affiliated multimode resonant patch includes paster (1011), rectangular patch (1012), annulus (1013).
3., according to claim 1 based on the ultra wide band bandpass filter of symmetrical annulus, it is characterised in that microstrip transmission line (103), microstrip transmission line is upper and lower with rectangular patch (1012) apart from equal and width is identical.
4., according to claim 1 based on the ultra wide band bandpass filter of symmetrical annulus, it is characterised in that port paster (102), port paster is symmetrical above and below about transmission microstrip line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410802396.1A CN105789748A (en) | 2014-12-21 | 2014-12-21 | Ultra-wideband pass filter based on symmetric ring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410802396.1A CN105789748A (en) | 2014-12-21 | 2014-12-21 | Ultra-wideband pass filter based on symmetric ring |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105789748A true CN105789748A (en) | 2016-07-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201410802396.1A Pending CN105789748A (en) | 2014-12-21 | 2014-12-21 | Ultra-wideband pass filter based on symmetric ring |
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| CN (1) | CN105789748A (en) |
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2014
- 2014-12-21 CN CN201410802396.1A patent/CN105789748A/en active Pending
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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 |