CN202930515U - Rectangular ring multi-mode resonator-based microstrip wide-band filter - Google Patents
Rectangular ring multi-mode resonator-based microstrip wide-band filter Download PDFInfo
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- CN202930515U CN202930515U CN 201220658774 CN201220658774U CN202930515U CN 202930515 U CN202930515 U CN 202930515U CN 201220658774 CN201220658774 CN 201220658774 CN 201220658774 U CN201220658774 U CN 201220658774U CN 202930515 U CN202930515 U CN 202930515U
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- straight
- resonator
- flanked ring
- multimode resonator
- microstrip
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Abstract
Disclosed in the utility model is a rectangular ring multi-mode resonator-based microstrip wide-band filter that comprises a metal microstrip patch (30) and a metal ground plate (50). The metal microstrip patch (30) and the metal ground plate (50) are formed on the upper surface and the lower surface of a dielectric plate (40); and the metal microstrip patch includes a rectangular ring multi-mode resonator (10) and two stopband portions (20 and 21). Besides, the arranged rectangular ring multimode resonator is formed based on combination and improvement of a stepped impedance all-wavelength ring resonator (SORR) and a stepped impedance half-wavelength resonator (SHR); and the two stopband portions employ asymmetric Pai-type structures for application to the input/output portion. According to the utility model, the provided filter has characteristics of compact structure, wide upper stopband, and low insertion loss in the passband and the like.
Description
Technical field
The utility model relates to a kind of microstrip broadband band pass filter based on the straight-flanked ring multimode resonator, this broadband band-pass filter compact conformation, size are little, have less insertion loss in passband, have simultaneously wider upper stopband, have good broadband character and higher frequency selectivity.
Background technology
In recent years, along with the continuous application of ultra broadband (UWB) technology in wireless communication technology and radio multimedium business, also accelerated the develop rapidly of broadband filter technology, diversified multimode resonator structure is widely used in the design of broadband filter, to improve the broadband character of filter.Although also comparatively satisfied from existing broadband-pass filter actual performance, the part that also comes with some shortcomings awaits improving.
Existing broadband filter based on multimode resonator, as the broadband band-pass filter that designs based on the comprehensive of bimodulus, three mode step shape electric impedance resonators or two kinds of resonators, relative bandwidth can reach more than 50%, but is difficult to obtain lower insertion loss.Carried out certain improvement for above-mentioned broadband filter afterwards, and introduced toroidal cavity resonator, and obtained lower logical in-band insertion loss, but still there is very large deficiency in the performances such as corresponding upper resistance band and frequency selection.Therefore the broadband band-pass filter that designs a kind of wide stopband, high-frequency selectivity and have a low insertion loss has great importance.
The utility model content
In order to improve the performances such as upper resistance band, insertion loss in existing broadband filter, the utility model provides a kind of microstrip broadband filter based on the straight-flanked ring multimode resonator, wherein adopt novel straight-flanked ring multimode resonator (10) to be used for improving performance in passband, adopt two of the π type structure formations of asymmetry to be with the resistance part to divide (20,21) to be used for widening stopband.
The technical scheme that the utility model adopts is:
A kind of microstrip broadband filter based on the straight-flanked ring multimode resonator, it is characterized in that, comprise the metal micro-strip paster (30) and the metal ground plate (50) that are formed at the upper and lower surface of dielectric-slab (40), described metal micro-strip paster comprise straight-flanked ring multimode resonator (10), two the band resistance part divide (20,21).
Described a kind of microstrip broadband filter based on the straight-flanked ring multimode resonator is characterized in that, straight-flanked ring multimode resonator (10) and two band resistance part divides (20,21) to intercouple with Coupled Miccrostrip Lines.
Described a kind of microstrip broadband filter based on the straight-flanked ring multimode resonator, it is characterized in that, straight-flanked ring multimode resonator (10) is based on combination and the improvement of the long toroidal cavity resonator of scalariform impedance all-wave (SORR) and scalariform impedance half-wave resonator (SHR).
Described a kind of microstrip broadband filter based on the straight-flanked ring multimode resonator, it is characterized in that, be with the resistance part to divide (20 for two, 21) adopt asymmetric π type structure applications in input/output section, purpose is to widen stopband, and it is by the two unequal microstrip line counterfoil of segment length (L that the π type band resistance part of asymmetric is divided
1, L
2) consist of.
The utility model has following advantage and characteristic with respect to prior art:
(1) compact conformation, size are little, are easy to processing, and make low price.
(2) the 3dB relative bandwidth can reach more than 50%, and has wider upper stopband.
(3) have precipitous walled belt and very high frequency selectivity.
(4) logical in-band insertion loss is very low, can reach below 1dB.
Description of drawings
Fig. 1 is based on the basic structure vertical view of the microstrip broadband filter of straight-flanked ring multimode resonator;
Embodiment
In recent years; multimode ring type resonant device begins to be applied in the design of microstrip bandpass filter; this type filter takes full advantage of the characteristic that presents a plurality of modes of resonance in passband; realize that the multimode ring resonator has broadband performance and its compact conformation preferably; be easy to processing; applied widely, the utility model utilizes the multi resonant of the resonance structure characteristic of shaking just, has designed a kind of low cost, high performance microstrip broadband band pass filter.
Below in conjunction with accompanying drawing, concrete structure of the present utility model is further described.
As shown in Figure 1, the utility model divides (20,21) to form by straight-flanked ring multimode resonator (10), two band resistance parts.Straight-flanked ring multimode resonator and two band resistance part is divided by Coupled Miccrostrip Lines and is intercoupled.
As shown in Figure 1, this filter straight-flanked ring multimode resonator (10) part is of a size of:
The long W of straight-flanked ring outside
2=7.50mm, wide L
11=6.3mm, the straight-flanked ring width W
3=0.4mm.Other is of a size of: L
4=0.60mm, L
5=16.90mm, L
8=23.51mm, L
9=6.45mm, L
10=1.76mm, W
1=1.13mm, s=0.37mm.
As shown in Figure 1, two, this filter is with the resistance part to divide (20,21) part to be of a size of:
The length of two microstrip line counterfoils: L
1=7.99mm, L
2=6.03mm.Other structure of asymmetric π type structure is of a size of: L
6=4.75mm, L
7=0.74mm, L
3=18.47mm.
The selection of medium substrate (40): the medium substrate that the utility model adopts is of a size of 2cm*6cm, and its relative dielectric constant is 11.2, and this substrate price is lower, and loss is less, applied range.In practice, can adopt according to practical application the medium substrate of other dielectric constant loss angle, the dielectric constant loss angle of the medium substrate that the utility model adopts is 0.009, and its thickness is 1.6mm, satisfies required intensity.
The design of straight-flanked ring multimode resonator (10): in recent years; multimode ring type resonant device begins to be widely applied in the design of microstrip broadband band pass filter; such filter takes full advantage of the characteristic that presents a plurality of modes of resonance in passband; realize that the multimode toroidal cavity resonator has broadband performance and its compact conformation preferably, be easy to processing.The straight-flanked ring multimode resonator of the utility model design is based on combination and the improvement of the long toroidal cavity resonator of scalariform impedance all-wave (SORR) and scalariform impedance half-wave resonator (SHR), its compact conformation, is easy to process, and can produces good band-pass behavior.The straight-flanked ring multimode resonator of the utility model design produces four transmission poles in passband, the place produces two transmission zeros at upper and lower cut-off frequency, the passband relative bandwidth of its generation can reach more than 55%, and has realized precipitous walled belt and high-frequency selectivity.
Two designs of being with the resistance part to divide (20,21): the utility model adopts the π type structure of asymmetric to consist of and is with the resistance part to divide, is applied to input/output section and can widens stopband.Wherein to divide be by the unequal little band counterfoil (L of two segment length in the π type band resistance part of asymmetric
1, L
2) consist of, this structure can partly produce two transmission zeros by stopband on high frequency, thereby reaches the effect that suppresses harmonic effect, widens stopband.Two of this broadband band-pass filter that divide connection with the resistance part is common driving source (50 Ω).
In order to reduce the volume of filter, microstrip line is folded up.This design not only makes the structure of filter more compact, more can well realize communication.The filter of this practical design can not only be realized the relative bandwidth more than 55%, and has higher frequency selectivity and good stopband characteristic, and logical in-band insertion loss is lower simultaneously, simple in structure, volume is little, is printed on the two sides of medium substrate, be convenient to the batch production, debugging, and with low cost.
Claims (4)
1. microstrip broadband filter based on the straight-flanked ring multimode resonator, it is characterized in that, comprise the metal micro-strip paster (30) and the metal ground plate (50) that are formed at the upper and lower surface of dielectric-slab (40), described metal micro-strip paster comprise straight-flanked ring multimode resonator (10), two the band resistance part divide (20,21).
2. a kind of microstrip broadband filter based on the straight-flanked ring multimode resonator according to claim 1, is characterized in that, straight-flanked ring multimode resonator (10) and two band resistance part divides (20,21) to intercouple with Coupled Miccrostrip Lines.
3. a kind of microstrip broadband filter based on the straight-flanked ring multimode resonator according to claim 1, it is characterized in that, straight-flanked ring multimode resonator (10) is based on combination and the improvement of the long toroidal cavity resonator of scalariform impedance all-wave (SORR) and scalariform impedance half-wave resonator (SHR).
4. a kind of microstrip broadband filter based on the straight-flanked ring multimode resonator according to claim 1, it is characterized in that, be with the resistance part to divide (20 for two, 21) adopt asymmetric π type structure applications in input/output section, purpose is to widen stopband, and it is by the two unequal microstrip line counterfoil of segment length (L that the π type band resistance part of asymmetric is divided
1, L
2) consist of.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220658774 CN202930515U (en) | 2012-12-04 | 2012-12-04 | Rectangular ring multi-mode resonator-based microstrip wide-band filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220658774 CN202930515U (en) | 2012-12-04 | 2012-12-04 | Rectangular ring multi-mode resonator-based microstrip wide-band filter |
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| Publication Number | Publication Date |
|---|---|
| CN202930515U true CN202930515U (en) | 2013-05-08 |
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ID=48220434
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220658774 Expired - Fee Related CN202930515U (en) | 2012-12-04 | 2012-12-04 | Rectangular ring multi-mode resonator-based microstrip wide-band filter |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104051830A (en) * | 2014-06-24 | 2014-09-17 | 中国科学院微电子研究所 | Multimode broadband band-pass filter |
| CN104767015A (en) * | 2015-03-30 | 2015-07-08 | 西安理工大学 | Miniature ultra-wideband filter |
| CN105048030A (en) * | 2015-06-18 | 2015-11-11 | 西安电子科技大学 | 2-18GHz ultra-wide-band three-trapped-wave adjustable microstrip filter |
-
2012
- 2012-12-04 CN CN 201220658774 patent/CN202930515U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104051830A (en) * | 2014-06-24 | 2014-09-17 | 中国科学院微电子研究所 | Multimode broadband band-pass filter |
| CN104767015A (en) * | 2015-03-30 | 2015-07-08 | 西安理工大学 | Miniature ultra-wideband filter |
| CN104767015B (en) * | 2015-03-30 | 2018-02-27 | 西安理工大学 | Miniature ultra wide band wave filter |
| CN105048030A (en) * | 2015-06-18 | 2015-11-11 | 西安电子科技大学 | 2-18GHz ultra-wide-band three-trapped-wave adjustable microstrip filter |
| CN105048030B (en) * | 2015-06-18 | 2017-11-21 | 西安电子科技大学 | The trap of 2 18GHz ultra wide bands three is adjustable microstrip filter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130508 Termination date: 20131204 |