CN101989672A - Novel DGW band-pass filter - Google Patents
Novel DGW band-pass filter Download PDFInfo
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- CN101989672A CN101989672A CN2010105104117A CN201010510411A CN101989672A CN 101989672 A CN101989672 A CN 101989672A CN 2010105104117 A CN2010105104117 A CN 2010105104117A CN 201010510411 A CN201010510411 A CN 201010510411A CN 101989672 A CN101989672 A CN 101989672A
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Abstract
The invention relates to a novel DGW band-pass filter, which is characterized in that: the filter has a dielectric slab structure of which the upper layer has a micro-strip feeder structure and the lower layer is a ground layer; the micro-strip feeder structure is vertically connected with a micro-strip branch feeder through an input and an output respectively, the ground layer is a pair of box-shaped DGW resonators; and the micro-strip feeder structure is positioned right above the DGW resonators. By using the DGW resonators, the entire circuit can bear a high-power signal; the size of the DGW resonators is reduced by a bending design method; the signal input/output feeders are respectively connected with two branch lines, and respectively coupled to the DGW resonators arranged on the ground; and mixed coupling including electric coupling and magnetic coupling is adopted by the pair of DGW resonators. The filter formed by the pair of DGW resonators works at the frequency of 0.9-8GHz, the effective control over the bandwidth of the filter can be realized by using the mixed coupling form, and in the structure of the invention, a transmission zero point can be formed on the left of the filter passband, so that the attenuation band property of the filter is improved.
Description
Technical field
The present invention relates to a kind of novel DGW band pass filter, belong to microwave communication device technology field.
Background technology
Enormous social and economic worth have been created in Wireless Telecom Equipment extensive use in military communication, satellite communication, radio and television communication, radar and fields such as navigation system and commercial mobile communication.In the next generation wireless communication technology, research adapts to the microwave and millimeter wave integrated circuit (IC) chip and the novel integrated microstrip filter of miniaturization and broadband requirement, is one of the most key technology of development future broadband wireless communication systems.No matter be in traditional integrated circuit structure, still in new these circuit integrated technologies that propose, the back side of circuit---metal ground plate in the quite a long time, does not cause people's attention.Korea S Dal professor Ahn leader's seminar has proposed a kind of novel ground connection theory---defect ground structure theory (DGS) in calendar year 2001.Defect ground structure becomes the focus of current microwave and millimeter wave integrated circuit research because of it has good band gap properties and slow wave characteristic.At present, defect ground structure has been widely used in constructing small size, high performance coupling line, broadband filter, power splitter, radio-frequency (RF) switch, oscillator, amplifier, frequency multiplier and paster antenna etc., and range of application almost relates to each discrete parts and the module of whole integrated front end transmission circuit.And defective ground waveguide (DGW) is a kind of improvement of carrying out on (DGS), makes to have guide properties---the carrying high-power signal.
Summary of the invention
The objective of the invention is, for hybrid coupled design problem that solves the DGW band pass filter and the miniaturization that realizes the DGW band pass filter.
Technical scheme of the present invention is that the present invention adopts existing electric coupling that magnetic-coupled hybrid coupled design is arranged again; Adopt the bending method for designing, well reduced the size of DGW resonator, thereby reduced the size of entire circuit.
DGW band pass filter 3 D stereo view of the present invention as shown in Figure 1, the upper strata of DGW band pass filter of the present invention is the microstrip feed line structure, lower floor is a ground plane. Upper strata 3,4 is respectively the input and output feeder line, and 1,2 are respectively the minor matters feeder line; Lower floor 5,6 is respectively a pair of square frame shape DGW resonator; The microstrip feed line structure is directly over the DGW resonator, and 1,2,3,4 are coupled as electric coupling; 5,6 be coupled as magnetic coupling electric coupling is also arranged.DGW band pass filter signal transmission of the present invention has two paths, article one, set out for little tape input feeder line of signal by the upper strata, little band minor matters feeder line on approach upper strata, be coupled to the DGW resonator of lower floor again by dielectric-slab, then by the coupling of the resonator between the DGW resonator, signal is coupled to little band minor matters feeder line on upper strata by dielectric-slab, and last signal passes to little band output feeder by little band minor matters feeder line on upper strata.Another sets out for little tape input feeder line of signal by the upper strata, directly is coupled to the DGW resonator of lower floor by dielectric-slab, and by the coupling of the resonator between the DGW resonator, signal is coupled to little band output feeder by dielectric-slab then.
DGW band pass filter of the present invention upper strata microstrip feed line physical dimension is as follows:
A is 4mm-25mm; B is 3mm-18mm; C is 0.5mm-2.5mm; D is 2mm-10mm; E is 0.2mm; F is 6mm-24mm; G is 2mm-24mm; H is 1.5mm;
DGW band pass filter of the present invention lower floor ground plane structure size is as follows:
I is 3mm-20mm; J is 3mm-24mm; K is 3mm-20mm; U is 3mm-24mm; V is 0.3mm-0.6mm; M is 0.2mm-0.4mm; N is 0.2mm; P is 0.3mm; Q is 0.3mm; R is 0.3mm; S is 0.3mm-0.4mm; T is 0.35mm-0.4mm.
DGW band pass filter centre frequency working range of the present invention is 0.9GHz-8GHz.
The present invention's beneficial effect compared with prior art is that the present invention is not increasing under circuit area and the processed complex degree prerequisite, adopts the DGW resonator can realize filter miniaturization, carrying high-power signal ability; Adopt existing electric coupling to have magnetic-coupled hybrid coupled design to realize transmission zero again, improved the stopband characteristic of filter effectively.
The present invention is applicable to the microwave communication of carrying high-power signal.
Description of drawings
Fig. 1 is a DGW filter 3 D stereo view;
Fig. 2 is DGW filter superstructure figure;
Fig. 3 is DGW filter understructure figure;
Fig. 4 is the DGW filter graph architecture;
Among the figure: 1,2 be respectively the minor matters feeder line, 3,4 are respectively the input and output feeder line, and 5,6 are respectively a pair of square frame shape DGW resonator; A-h is a upper strata microstrip structure size Expressing; I-v is a DGW resonator structure size Expressing.
Embodiment
The specific embodiment of the invention as shown in Figure 1, this figure is a DGW band pass filter 3-D view, Fig. 2 and Fig. 3 are respectively the structure chart of filter the upper and lower.
The filter upper strata is the microstrip feed line structure, and lower floor is a ground plane, and upper strata 3,4 is respectively the input and output feeder line, and 1,2 are respectively the minor matters feeder line; Lower floor 5,6 is respectively a pair of square frame shape DGW resonator; The microstrip feed line structure is directly over the DGW resonator.
The transmission of present embodiment DGW band pass filter signal has two paths, article one, set out for little tape input feeder line of signal by the upper strata, little band minor matters feeder line on approach upper strata, be coupled to the DGW resonator of lower floor again by dielectric-slab, then by the coupling of the resonator between the DGW resonator, signal is coupled to little band minor matters feeder line on upper strata by dielectric-slab, and last signal passes to little band output feeder by little band minor matters feeder line on upper strata.Another sets out for little tape input feeder line of signal by the upper strata, directly is coupled to the DGW resonator of lower floor by dielectric-slab, and by the coupling of the resonator between the DGW resonator, signal is coupled to little band output feeder by dielectric-slab then.
Embodiment 1:
The physical dimension of present embodiment DGW band pass filter upper strata microstrip feed line structure and lower floor's ground plane is:
A＝4.5mm；b＝4.05mm；c＝0.7mm；d＝3.1mm；e＝0.2mm；f＝8.9mm；g＝2.2mm；h＝1.5mm；i＝4.2mm；j＝4mm；k＝3.75mm；m＝0.2mm；n＝0.2mm；p＝0.3mm；q＝0.3mm；r＝0.3mm；s＝0.3mm；t＝0.35mm；u＝3.65mm；v＝0.35mm。
The centre frequency of present embodiment is 5.7GHz; Resonator between the DGW resonator is coupled as hybrid coupled, has both had electric coupling, has magnetic coupling again, and the last passband left side produces a transmission zero, has improved the stopband characteristic of filter.
The physical dimension of present embodiment DGW band pass filter upper strata microstrip feed line structure and lower floor's ground plane is:
a＝22.5mm；b＝16.5mm；c＝1.8mm；d＝7.2mm；e＝0.2mm；f＝20mm；g＝20mm；h＝1.5mm；i＝17mm；j＝21.9mm；k＝16.75mm；m＝0.3mm；n＝0.2mm；p＝0.3mm；q＝0.3mm；r＝0.3mm；s＝0.4mm；t＝0.4mm；u＝21.7mm；v＝0.4mm。
The centre frequency of present embodiment is 1.2GHz; Resonator between the DGW resonator is coupled as hybrid coupled, has both had electric coupling, has magnetic coupling again, and the last passband left side produces a transmission zero, has improved the stopband characteristic of filter.
Claims (3)
1. a novel DGW band pass filter is characterized in that, described filter is that a kind of upper strata is the microstrip feed line structure, and lower floor is the dielectric-slab structure of ground plane; Described microstrip feed line structure is respectively by input, output and little vertical linking to each other of band minor matters feeder line, and ground plane is a pair of square frame shape DGW resonator; The microstrip feed line structure is directly over the DGW resonator.
2. a kind of novel DGW band pass filter according to claim 1 is characterized in that, described DGW resonator adopts the square bending design that adds, and DGW resonator each several part is of a size of: i is 3mm-20mm; J is 3mm-24mm; K is 3mm-20mm; U is 3mm-24mm; V is 0.3mm-0.6mm; M is 0.2mm-0.4mm; N is 0.2mm; P is 0.3mm; Q is 0.3mm; R is 0.3mm; S is 0.3mm-0.4mm; T is 0.35mm-0.4mm.
3. a kind of novel DGW band pass filter according to claim 1 is characterized in that, it is 4mm-25mm that described upper strata microstrip feed line structure each several part is of a size of a; B is 3mm-18mm; C is 0.5mm-2.5mm; D is 2mm-10mm; E is 0.2mm; F is 6mm-24mm; G is 2mm-24mm; H is 1.5mm.
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| CN2010105104117A CN101989672A (en) | 2010-10-18 | 2010-10-18 | Novel DGW band-pass filter |
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| CN2010105104117A CN101989672A (en) | 2010-10-18 | 2010-10-18 | Novel DGW band-pass filter |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102255122A (en) * | 2011-04-26 | 2011-11-23 | 中兴通讯股份有限公司 | Band elimination filter and base station equipment |
| CN108879043A (en) * | 2018-06-26 | 2018-11-23 | 井冈山大学 | A kind of three modal balancing filters using coupling minor matters load line of rabbet joint resonance structure |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101771184A (en) * | 2010-03-08 | 2010-07-07 | 华东交通大学 | Mixed series and parallel interconnection technique based on 3D-DGS |
| CN101853975A (en) * | 2010-04-27 | 2010-10-06 | 华东交通大学 | Low-loss band-pass filter based on defected ground structure |
| CN101867074A (en) * | 2010-05-04 | 2010-10-20 | 华东交通大学 | Broadband filter based on defect ground plane integrated waveguide (DGW) structure |
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- 2010-10-18 CN CN2010105104117A patent/CN101989672A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101771184A (en) * | 2010-03-08 | 2010-07-07 | 华东交通大学 | Mixed series and parallel interconnection technique based on 3D-DGS |
| CN101853975A (en) * | 2010-04-27 | 2010-10-06 | 华东交通大学 | Low-loss band-pass filter based on defected ground structure |
| CN101867074A (en) * | 2010-05-04 | 2010-10-20 | 华东交通大学 | Broadband filter based on defect ground plane integrated waveguide (DGW) structure |
Non-Patent Citations (2)
| Title |
|---|
| L. REN ET AL.: "Dual-band bandpass filter based on dual-plane microstrip/interdigital DGS slot structure", 《ELECTRONICS LETTERS》, vol. 45, no. 21, 31 October 2009 (2009-10-31), XP006034020, DOI: 10.1049/EL:20091851 * |
| SUTATORN PROMPRATHOM,ETC: "A Microstrip Two-layer Dual-Passband Filter Using Aperture-Coupled SIRs with Wide Rejection Bandwidth by Defected Ground Structure(DGS)", 《PROCEEDINGS OF ASIA-PACIFIC MICROWAVE CONFERENCE 2007》, 31 December 2007 (2007-12-31) * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102255122A (en) * | 2011-04-26 | 2011-11-23 | 中兴通讯股份有限公司 | Band elimination filter and base station equipment |
| CN108879043A (en) * | 2018-06-26 | 2018-11-23 | 井冈山大学 | A kind of three modal balancing filters using coupling minor matters load line of rabbet joint resonance structure |
| CN108879043B (en) * | 2018-06-26 | 2024-04-12 | 井冈山大学 | Three-mode balance filter adopting coupling branch loading slot line resonance structure |
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Application publication date: 20110323 |