CN210326063U - Dual-mode dielectric strip resonator and differential dual-passband filter comprising same - Google Patents
Dual-mode dielectric strip resonator and differential dual-passband filter comprising same Download PDFInfo
- Publication number
- CN210326063U CN210326063U CN201920854781.9U CN201920854781U CN210326063U CN 210326063 U CN210326063 U CN 210326063U CN 201920854781 U CN201920854781 U CN 201920854781U CN 210326063 U CN210326063 U CN 210326063U
- Authority
- CN
- China
- Prior art keywords
- dielectric strip
- dual
- differential
- metal cavity
- substrate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
The utility model relates to a bimodulus dielectric strip syntonizer reaches contains difference dual passband filter of syntonizer. The utility model discloses a load a pair of earth bar under traditional medium tape, constitute a bimodulus medium tape syntonizer, this bimodulus syntonizer has two close TMs11A mode, and the two TMs11The dies can be independently controlled. Unloaded quality factor of the two modesQ uGreater than 600 in X band, and in licenseThe device with low loss has high application value. And both modes can be excited differentially and used to design a differential dual bandpass filter. The external quality factors and the coupling coefficients of the two pass bands can be independently controlled, and the common mode rejection of the pass bands is above 25 dB. To verify the proposed idea, a prototype of the filter operating at 8.13GHz and 11.13GHz was designed and assembled, and the simulation results were consistent with the test results.
Description
Technical Field
The utility model relates to a bimodulus dielectric strip syntonizer and contain the difference dual passband filter of syntonizer belongs to communication transmission technical field.
Background
In recent years, differential architecture circuits have attracted a great deal of attention due to their better performance against ambient noise and electromagnetic crosstalk than single-ended circuits. With this trend, many differential devices are designed, such as power splitters, phase shifters, antennas, and band pass filters. The band-pass filter, which is an indispensable device for the rf front end, plays a critical role in frequency selection. In order to meet the requirements for multi-band use in radio frequency systems, differential dual bandpass filters have been proposed over the last few years.
There are many methods for designing a differential dual-passband filter, such as connecting two single-passband filters operating in different frequency bands in parallel, or using dual-mode resonators. As is well known, a dual-mode resonator can be equivalent to two single-mode resonators, so that the designed filter has a small size, and two close pass bands can be easily obtained, thereby meeting the requirements of most applications. Therefore, various technologies based on the principle of the dual mode resonator are used, such as microstrip lines and SIW, which have been widely developed, and they can be differentially excited to design a dual band filter. Unfortunately, they have a relatively low unloaded quality factor, resulting in relatively high losses, particularly in high frequency applications. In contrast, a dielectric resonator made of a high dielectric material is a typical low-loss radio-frequency resonator and has been widely used in filters and antennas in the past few years. In view of this, a dual-mode dielectric resonator directly placed in a cavity is used to design a dual-band filter, and the resonator adopts a half-cut method to reduce the profile of the designed filter. However, its 3D structure is still an obstacle in the design of radio frequency integrated circuits.
SUMMERY OF THE UTILITY MODEL
To the above-mentioned defect, aim at provides a rational in infrastructure, possesses high outside quality factor and good filtering performance's bimodulus medium band strip syntonizer and contains the difference dual bandpass filter of syntonizer.
Therefore, the utility model adopts the technical scheme that: the dual-mode dielectric strip resonator comprises a metal cavity (1), wherein a substrate (2) is arranged in one surface of the metal cavity (1), a dielectric strip (3) is arranged on the substrate (2), and a grounding rod (4) located between the dielectric strip (3) and the substrate (2) is arranged on the lower surface of the dielectric strip (3).
Furthermore, the distance between the side edge of the dielectric strip (3) and the corresponding side inner wall of the metal cavity (1) is far larger than the thickness of the substrate (2).
Furthermore, the number of the grounding rods (4) is two, the two grounding rods are symmetrically arranged on the lower surface of the medium belt (3), and the grounding rods (4) are arranged in the middle of the medium belt (3) in the width direction of the medium belt (3).
Furthermore, the metal cavity (1), the substrate (2) and the dielectric strip (3) are cuboid, and the grounding rod (4) is in a cylindrical form.
The application of the dual-mode dielectric strip resonator is to use the dual-mode dielectric strip resonator in a differential dual-passband filter with two independently controllable bandwidths.
The differential dual-passband filter comprising the resonator comprises two coupled resonators, two pairs of differential microstrip lines (5) and a shielding metal cavity (1), wherein feeder lines of the differential microstrip lines (5) are directly connected with a ground rod (4).
Furthermore, a tuning screw (6) is arranged, and the tuning screw (6) is arranged at the upper part of the medium belt (3).
Further, the length of the medium belt (3) is set asl 1，The distance between the two grounding rods (4) isl2，The distance between the side edge of the dielectric strip (3) and the corresponding side inner wall of the metal cavity (1) isl 3，The width of the medium belt (3) isw，The thickness of the dielectric tape (3) ist，The extension length of a feeder line of the differential microstrip line (5) isl d，The distance between the two dielectric tapes (3) iss，The thickness of the substrate (2) ish s，The height of the metal cavity (1) ish，The length of the metal cavity (1) isa，The width of the metal cavity (1) isbThe diameter of the ground rod (4) isd 1，The diameter of the resonance screw (6) isd 2；
The above dimensional parameters are as follows:l 1= 17.8 mm,l 2= 9.7 mm,l 3= 2.1 mm,w= 2 mm,t= 1 mm,l d= 0.3 mm,s= 5.3 mm,h s= 0.5 mm,h= 10 mm,a= 28 mm,b= 22 mm,d 1=0.6 mm andd 2= 3 mm。
the various dimensional parameters described above may be scaled up or down.
The utility model has the advantages that: the utility model discloses the bimodulus dielectric strip syntonizer in a class plane is proposed and is used for designing difference dual bandpass filter. A double-mode dielectric strip resonator is obtained by loading a pair of grounding rods under the traditional half-wavelength dielectric strip resonator, and has higher external quality factor. In addition, the proposed dielectric strip is placed on a low-dielectric-constant substrate and excited by two differential microstrip lines to design a filter. In order to verify the correctness of the proposed idea, a differential dual-passband bandpass filter is designed and processed, and the simulation result and the test result thereof are well-fitted.
Drawings
Fig. 1 is a schematic structural diagram of a dual-mode dielectric strip resonator according to the present invention.
FIG. 2 shows the present inventionl 1Fixed at =17.8mm, resonant frequency andQ uwith followingl 2A trend graph of the changes.
FIG. 3 is a drawing showingl 2Fixed at =9.7mm, resonant frequency andQ uwith followingl 1A trend graph of the changes.
Fig. 4 is a three-dimensional schematic diagram of a differential dual bandpass filter.
Fig. 5 is a top view of a differential dual bandpass filter.
Fig. 6 is a side view of a differential dual bandpass filter.
FIG. 7 shows that the coupling coefficients of the low pass band and the high pass band are differentsIn the case ofh dA trend graph of the changes.
FIG. 8 shows that the external quality factors of the low pass band and the high pass band are differentd 1In the case ofl dA trend graph of the changes.
FIG. 9 is a schematic view of a process for producing a semiconductor devicel 2Fixed at =9.7mm, the simulated frequency response followsl 1A trend graph of the changes.
FIG. 10 is a graph of simulation and test results for a designed differential dual bandpass filter.
Detailed Description
The dual-mode dielectric strip resonator comprises a metal cavity (1), wherein a substrate (2) is arranged in one surface of the metal cavity (1), a dielectric strip (3) is arranged on the substrate (2), and a grounding rod (4) located between the dielectric strip (3) and the substrate (2) is arranged on the lower surface of the dielectric strip (3).
Furthermore, the distance between the side edge of the dielectric strip (3) and the corresponding side inner wall of the metal cavity (1) is far larger than the thickness of the substrate (2).
Furthermore, the number of the grounding rods (4) is two, the two grounding rods are symmetrically arranged on the lower surface of the medium belt (3), and the grounding rods (4) are arranged in the middle of the medium belt (3) in the width direction of the medium belt (3).
Furthermore, the metal cavity (1), the substrate (2) and the dielectric strip (3) are cuboid, and the grounding rod (4) is in a cylindrical form.
The application of the dual-mode dielectric strip resonator is to use the dual-mode dielectric strip resonator in a differential dual-passband filter with two independently controllable bandwidths.
The differential dual-passband filter comprising the resonator comprises two coupled resonators, two pairs of differential microstrip lines (5) and a shielding metal cavity (1), wherein feeder lines of the differential microstrip lines (5) are directly connected with a ground rod (4).
Furthermore, a tuning screw (6) is arranged, and the tuning screw (6) is arranged at the upper part of the medium belt (3).
Further, the length of the medium belt (3) is set asl 1，The distance between the two grounding rods (4) isl2, the distance between the side edge of the dielectric strip (3) and the corresponding side inner wall of the metal cavity (1) isl 3，The width of the medium belt (3) isw，The thickness of the dielectric tape (3) ist，The extension length of a feeder line of the differential microstrip line (5) isl d，The distance between the two dielectric tapes (3) iss，The thickness of the substrate (2) ish s，The height of the metal cavity (1) ish，The length of the metal cavity (1) isa，The width of the metal cavity (1) isbThe diameter of the ground rod (4) isd 1，The diameter of the resonance screw (6) isd 2；
The above dimensional parameters are as follows:l 1= 17.8 mm,l 2= 9.7 mm,l 3= 2.1 mm,w= 2 mm,t= 1 mm,l d= 0.3 mm,s= 5.3 mm,h s= 0.5 mm,h= 10 mm,a= 28 mm,b= 22 mm,d 1=0.6 mm andd 2= 3 mm。
the various dimensional parameters described above may be scaled up or down.
The following is the description of the present invention to make better understanding the present invention: the utility model provides a novel design of dual passband medium band filter with independent control. The traditional dielectric strip is formed by loading a dielectric strip with a high dielectric constant of one-half wavelength on a grounded low-dielectric-constant substrate; the utility model discloses a load a pair of earth bar under traditional medium tape, then constitute a bimodulus medium tape syntonizer, this bimodulus syntonizer has two close TMs11A mode, and the two TMs11The dies can be independently controlled. Unloaded quality factor of the two modesQ uThe X wave band is larger than 600, and the high-performance high-power-consumption low-loss composite material has high application value in a plurality of low-loss devices. And both modes can be excited differentially and used to design a differential dual bandpass filter. The external quality factors and the coupling coefficients of the two pass bands can be independently controlled, and the common mode rejection of the pass bands is above 25 dB. To verify the proposed idea, a prototype of the filter operating at 8.13GHz and 11.13GHz was designed and assembled, and the simulation results were consistent with the test results.
Fig. 1 is a proposed dual mode dielectric strip resonator structure in which a metal cavity is used to shield the signal. When the distance from the side edge of the medium strip to the cavityl 3Much thicker than the dielectric substrateh sThe metal cavity has negligible influence on the dielectric strip.
The utility model discloses the earth bar plays an important role in traditional half wavelength dielectric strip resonator converts the bimodulus dielectric strip resonator into. Fundamental mode (TM) of conventional half-wavelength dielectric strip resonator11The mode is split into two close low frequenciesf 0LMode and high frequencyf 0UAnd (5) molding. By varying the distance between two ground barsl 2And the length of the whole dielectric tapel 1Invariably, both resonant frequencies and the unloaded quality factor of the dual-mode dielectric strip can be independently controlled. As can be seen from the view in figure 2,f 0Landf 0Uall followl 2Is increasedIncreased and higher, at the same time of low frequencyQ uAt high frequencies with increased amplitudeQ uAnd (4) reducing. Similarly, whenl 2Is fixed and fixedl 1When the number of the channels is reduced,f 0Umove downwards tof 0LUnchanged, as shown in fig. 3. As can be seen from fig. 2 and fig. 3, due to the introduction of the metal grounding rod, the external quality factors of the two modes are slightly lower than that of the conventional dielectric strip, but the frequency of the two modes is higher than 600 at the X-band and is 5-10 times higher than that of the microstrip line, so that the metal grounding rod has high practical value in many low-loss applications.
Fig. 4-6 show the structure of a differential dual bandpass filter of the design. The dielectric strip resonator comprises two coupled dielectric strip resonators with grounding rods, two pairs of differential microstrip lines and a shielding metal cavity. The microstrip feed line is directly connected with the ground rod, and the length of the extended part of the feed linel 3External quality factor that can be used to independently control two passbandsQ eAnd has little effect on the media tape.
The utility model discloses two differential mode passbands all are based on the design of butterworth prototype. The center frequency of the low frequency passband is 8.13GHz and the relative bandwidth is 3.9%, while the center frequency of the high frequency passband is 11.13GHz and its relative bandwidth is 3.6%. From these properties, the lumped parameters of its low-pass prototype are:
=
=1,
=
=1.4142,
=
= 1.4142, and
=
and = 1. Then, the required coupling coefficientk 12AndQ ecan be calculated. Coupling coefficient of low frequency passbandk 12=0.028, external quality factorQ e=36, and coupling coefficient of high-frequency pass bandk 12=0.025, external quality factorQ e=39。
Coupling coefficient of two pass bandskMainly by the distance between two dielectric strip resonatorssThe decision is shown in FIG. 7. Meanwhile, the coupling coefficient of the low-frequency passband and the coupling coefficient of the high-frequency passband can be independently controlled by adjusting the lengths of the two tuning screws on the dielectric strip resonator. As the tuning screw length increases, the coupling coefficient of the low frequency pass band increases while the coupling coefficient of the high frequency pass band does not change. For two pass bandsQ eThey both increase with increasing diameter of the metal via, as shown in fig. 8. Length of simultaneous feed line extensionl dWill result in a high frequency passbandQ eFor low frequency passbandQ eThere is no effect. As shown in fig. 7 and 8, two key parameters (coupling coefficient and external quality factor) of the constructed filter can be independently controlled, and this characteristic makes the construction of the dual-band filter easier to implement and therefore very useful.
Fig. 9 shows a simulated frequency response of the proposed differential dual bandpass filter. As previously thought, two passbands can bel 1(total length of dielectric strip resonator) adjustment. With followingl 1And increasing, the frequency of the upper passband is shifted down, and the frequency of the lower passband is kept unchanged, which is consistent with the characteristics of the dual-mode dielectric resonator in the figure 3.
Coupling coefficients extracted from fig. 7 and 8kAnd an external quality factorQ eThe dimensional parameters of the proposed filter are as follows:l 1= 17.8 mm,l 2= 9.7 mm,l 3= 2.1 mm,w= 2 mm,t= 1 mm,l d= 0.3mm,s= 5.3 mm,h s= 0.5 mm,h= 10 mm,a= 28 mm,b= 22 mm,d 1=0.6 mm andd 2= 3 mm。
to verify the validity of the idea, a differential dual bandpass filter using dual-mode dielectric strip resonators was designed, assembled and tested; fig. 10 shows the simulation and test results of the filter, which are well-stabilized. The center frequencies of the tested low pass band and high pass band were 8.13GHz and 11.13GHz, respectively, and their relative insertion losses were 0.88 and 1.28dB, respectively. The return loss of both pass-bands is better than 14dB and the common mode rejection in both pass-bands is better than 25 dB.
The present invention is a dual-mode dielectric strip resonator that has been studied and used to design a differential filter having two independently controllable bandwidths. The proposed dielectric strip resonator has two TMs close to the resonance frequency11Modes, they are easily excited by the differential microstrip lines, so a dual-passband differential mode response can be obtained. Meanwhile, the proposed dual-passband filter also has a planar structure. Its good filtering performance also indicates that this dual-mode dielectric strip resonator will become a good choice for future applications.
Claims (8)
1. The dual-mode dielectric strip resonator is characterized by comprising a metal cavity (1), wherein a substrate (2) is arranged in one surface of the metal cavity (1), a dielectric strip (3) is arranged on the substrate (2), and a grounding rod (4) positioned between the dielectric strip (3) and the substrate (2) is arranged on the lower surface of the dielectric strip (3).
2. The dual-mode dielectric strip resonator according to claim 1, characterized in that the distance of the side edge of the dielectric strip (3) from the corresponding side inner wall of the metal cavity (1) is much larger than the thickness of the substrate (2).
3. The dual-mode dielectric strip resonator according to claim 1, wherein the two ground rods (4) are symmetrically arranged on the lower surface of the dielectric strip (3), and the ground rod (4) is arranged in the middle of the dielectric strip (3) in the width direction of the dielectric strip (3).
4. The dual-mode dielectric strip resonator according to claim 1, characterized in that the metal cavity (1), the substrate (2) and the dielectric strip (3) are cuboid shaped and the ground rod (4) is in the form of a cylinder.
5. A differential dual bandpass filter comprising resonators as claimed in the preceding claims, characterized by comprising two coupled resonators, two pairs of differential microstrip lines (5) and a shielding metal cavity (1), the differential microstrip lines (5) feed lines being directly connected to a ground rod (4).
6. A differential dual bandpass filter according to claim 5, characterized in that tuning screws (6) are further provided, the tuning screws (6) being arranged at the upper part of the dielectric strip (3).
7. A differential dual bandpass filter according to claim 5, characterized in that the length of the dielectric strip (3) is given by l1The distance between the two ground rods (4) is l2，The distance between the side edge of the dielectric strip (3) and the corresponding side inner wall of the metal cavity (1) is l3，The width of the dielectric strip (3) is w, the thickness of the dielectric strip (3) is t, and the extension length of the feeder line of the differential microstrip line (5) is ld，The distance between the two dielectric tapes (3) is s, and the thickness of the substrate (2) is hs，The height of the metal cavity (1) is h, the length of the metal cavity (1) is a, the width of the metal cavity (1) is b, and the diameter of the grounding rod (4) is d1，The diameter of the resonance screw (6) is d2；
The above dimensional parameters are as follows: l1= 17.8 mm, l2= 9.7 mm, l3= 2.1 mm, w = 2 mm, t = 1mm, ld= 0.3 mm, s = 5.3 mm, hs= 0.5 mm, h = 10 mm, a = 28 mm, b = 22 mm, d1=0.6 mm and d2= 3 mm。
8. A differential dual bandpass filter according to claim 7, wherein the said dimensional parameters can be scaled up or down proportionally.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920854781.9U CN210326063U (en) | 2019-06-08 | 2019-06-08 | Dual-mode dielectric strip resonator and differential dual-passband filter comprising same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920854781.9U CN210326063U (en) | 2019-06-08 | 2019-06-08 | Dual-mode dielectric strip resonator and differential dual-passband filter comprising same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210326063U true CN210326063U (en) | 2020-04-14 |
Family
ID=70142577
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920854781.9U Active CN210326063U (en) | 2019-06-08 | 2019-06-08 | Dual-mode dielectric strip resonator and differential dual-passband filter comprising same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210326063U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110364792A (en) * | 2019-06-08 | 2019-10-22 | 扬州江嘉科技有限公司 | Bimodulus medium tape resonator and difference double-passband filter comprising the resonator |
-
2019
- 2019-06-08 CN CN201920854781.9U patent/CN210326063U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110364792A (en) * | 2019-06-08 | 2019-10-22 | 扬州江嘉科技有限公司 | Bimodulus medium tape resonator and difference double-passband filter comprising the resonator |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7567153B2 (en) | Compact bandpass filter for double conversion tuner | |
| TWI488353B (en) | T-type and λ / 2 step impedance resonator (SIR) designed to suppress the common mode signal balanced dual bandpass filter | |
| KR100576773B1 (en) | Microstrip band pass filter using end-coupled SIRs | |
| CN109473756B (en) | kinds of fully reconfigurable differential filter | |
| CN105186080A (en) | Half-mode substrate integrated waveguide band-pass filter | |
| CN114914647B (en) | Tunable broadband band-stop filter based on ferrite material | |
| Chen et al. | An evanescent-mode tunable dual-band filter with independently-controlled center frequencies | |
| CN113471648B (en) | Four-mode branch knot loading resonator and dual-passband band-pass filter based on same | |
| US20180174735A1 (en) | Dual-Band Radio Frequency Devices Incorporating Metamaterial Type Structures And Related Methods | |
| CN210326063U (en) | Dual-mode dielectric strip resonator and differential dual-passband filter comprising same | |
| CN111403861B (en) | UIR loaded three-order dual-passband substrate integrated waveguide filter | |
| Moitra et al. | Design and band coalition of dual band microstrip filter using DGS, coupled line structures and series inductive metallic vias | |
| CN217114739U (en) | Miniaturized ultra wide band pass filter | |
| CN116130910A (en) | Electromagnetic band gap filtering power divider | |
| US4284966A (en) | Wide bandwidth helical resonator filter | |
| CN111146536B (en) | Duplexer with fixed low channel frequency and adjustable high channel frequency and design method | |
| CN110364792A (en) | Bimodulus medium tape resonator and difference double-passband filter comprising the resonator | |
| İmeci et al. | Microstrip filters based on open stubs and SIR for high frequency and ultra-wideband applications | |
| CN104810596A (en) | Multimode resonator and dual-band filter thereof | |
| CN105789783A (en) | Quarter mode substrate-integrated waveguide band-pass filter loaded with composite left and right hands | |
| Farah et al. | A DESIGN OF COMPACT MICROWAVE DIPLEXER IN MICROSTRIP TECHNOLOGY BASED ON BAND-STOP FILTERS USING STEPPED IMPEDANCE RESONATOR | |
| Xu et al. | A novel suspended stripline bandpass filter using hybrid transmission line stepped impedance resonator | |
| CN113611994B (en) | Coplanar waveguide dual-frequency band-pass filter based on various shape defected grounds | |
| Ampavathina et al. | Compact complementary symmetric ring resonator band stop filter for ku band applications | |
| Noor et al. | The Effect of Chamfering Structure towards the Design of Open Loop Resonator Bandpass Filter for Microwave Applications |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |