CN204991908U - Double frequency -band band elimination filter based on defect microstrip structure and defect ground structure - Google Patents
Double frequency -band band elimination filter based on defect microstrip structure and defect ground structure Download PDFInfo
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- CN204991908U CN204991908U CN201520533104.9U CN201520533104U CN204991908U CN 204991908 U CN204991908 U CN 204991908U CN 201520533104 U CN201520533104 U CN 201520533104U CN 204991908 U CN204991908 U CN 204991908U
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Abstract
The utility model discloses a double frequency -band band elimination filter based on defect microstrip structure and defect ground structure, include: medium base plate (1), locate metallic coating ground plate (2) on medium base plate (1) bottom surface and locate metal microstrip line (3) above medium base plate (1), equal sculpture is gone up in ground plate (2) and microstrip line (3) has the delta defect structure that appears. The utility model discloses an utilize the sculpture to have the ground plate and the microstrip line constitution double frequency -band band elimination filter of delta shape defect structure to can effectively improve double frequency -band band elimination filter's selectivity characteristic, furthermore, the utility model discloses the central frequency of two stop bands of double frequency -band band elimination filter can realize independently adjust through the length that changes defect microstrip structure and defect ground structure, and two bandwidth can realize independently adjust through the clearance width that changes defect microstrip structure and defect ground structure.
Description
Technical field
The utility model relates to a kind of double frequency-band band stop filter, especially a kind of double frequency-band band stop filter based on defected microstrip structure and defect ground structure.
Background technology
In radio frequency microwave system, high performance band stop filter can be used for restraint speckle, ensures the high efficiency of transmission of useful signal.Traditional band stop filter is all realized by parallel connection open circuit minor matters, but the area of open circuit minor matters band stop filter is often very large, can not meet the requirement of microwave current device miniaturization.Therefore follow-up researcher also been proposed multiple band stop filter structure, comprises coupled structure band stop filter, gradual change step electric impedance resonator filter, M shape defected microstrip structure filter and pi shape defected microstrip structure band stop filter.Also have researcher by the helical resonator structure of defected microstrip structure and couple feed designed in conjunction go out double frequency-band band stop filter.U-shaped defect sturcture and T-shaped defect sturcture are used to design double frequency-band band stop filter equally.
As everyone knows, defect ground structure is etching defect structure on ground level, and due to the existence of defect sturcture, the electric current multilated of ground level, makes the equivalent capacity of ground level and equivalent inductance increase.After the definition proposing defect ground structure, there is various defect ground structure successively.Defected microstrip structure is similar with defect ground structure, and same etching defect structure on the microstrip line of passing through upsets the CURRENT DISTRIBUTION on microstrip line, thus the equivalent capacity on microstrip line and equivalent inductance are increased.Therefore defected microstrip structure and defect ground structure all have slow wave characteristic and band-stop response, and wherein, slow wave characteristic can be used for realizing the Miniaturization Design of filter, and band-stop response can be used for realizing stop-band filter design.The band-stop response of defected microstrip structure and defect ground structure depends on shape and the size of defect sturcture.But the existing double frequency-band band stop filter utilizing defect sturcture to design, volume is still larger, and the centre frequency of two stopbands and bandwidth interrelated, when regulating one of them centre frequency, another centre frequency also changes, when regulating one of them bandwidth, another bandwidth also changes, and cannot realize independent regulation; In addition, the selectivity characteristic of existing double frequency-band band stop filter still has much room for improvement, and therefore, needs the further exploratory development of researcher.
Utility model content
The purpose of this utility model is, a kind of double frequency-band band stop filter based on defected microstrip structure and defect ground structure is provided, it effectively can solve problems of the prior art, the problem that the selectivity characteristic of especially existing double frequency-band band stop filter still has much room for improvement.
For solving the problems of the technologies described above, the utility model adopts following technical scheme: based on the double frequency-band band stop filter of defected microstrip structure and defect ground structure, comprise: medium substrate, the metal micro-strip line be located at the coat of metal ground plate on medium substrate bottom surface and be located at above medium substrate, described ground plate and microstrip line are all etched with δ shape defect sturcture.
Above-mentioned based in the double frequency-band band stop filter of defected microstrip structure and defect ground structure, described ground plate and microstrip line are all etched with multiple δ shape defect sturcture, multiple δ shape defect sturcture cascade on ground plate, multiple δ shape defect sturcture cascade on microstrip line, thus the bandwidth of double frequency-band band stop filter can be increased, ensure that it has good selectivity characteristic simultaneously.
In the utility model, the number of the δ shape defect sturcture that described ground plate and microstrip line etch decides according to the bandwidth of actual required filter, such as need then to consider more multiple defect sturcture cascade during broader bandwidth, less defect sturcture cascade is then considered when needing bandwidth narrower, and can realize regulating 2 bandwidth separately due to the double frequency-band band stop filter in the utility model, the number of the δ shape defect sturcture thus ground plate and microstrip line etched can be different according to bandwidth requirement.
Preferably, described ground plate and microstrip line are all etched with 2 δ shape defect sturctures, thus can make that the bandwidth of double frequency-band band stop filter is comparatively large, selectivity characteristic is relatively good, the volume of filter is smaller simultaneously.
Aforesaid based in the double frequency-band band stop filter of defected microstrip structure and defect ground structure, described δ shape defect sturcture is δ shape groove, comprise the A line of rabbet joint, the B line of rabbet joint, the C line of rabbet joint, the D line of rabbet joint, the E line of rabbet joint, the F line of rabbet joint and the G line of rabbet joint, the two ends of the described B line of rabbet joint are connected with one end of the A line of rabbet joint and the C line of rabbet joint respectively, the two ends of the D line of rabbet joint are connected with one end of the E line of rabbet joint and the other end of the C line of rabbet joint respectively, and the two ends of the F line of rabbet joint are connected with one end of the G line of rabbet joint and the other end of the E line of rabbet joint respectively; The described A line of rabbet joint, the C line of rabbet joint, be parallel to each other between the E line of rabbet joint and the G line of rabbet joint, the D line of rabbet joint is parallel with the F line of rabbet joint with the B line of rabbet joint respectively; The described B line of rabbet joint is vertical with the C line of rabbet joint with the A line of rabbet joint respectively, and the D line of rabbet joint is vertical with the E line of rabbet joint with the C line of rabbet joint respectively, and the F line of rabbet joint is vertical with the G line of rabbet joint with the E line of rabbet joint respectively.The selectivity characteristic of the double frequency-band band stop filter utilizing this δ shape defect sturcture finally to obtain is better, and more compact structure, volume is less.
Preferably, the described A line of rabbet joint, the C line of rabbet joint are identical with the length of the E line of rabbet joint; The B line of rabbet joint is identical with the length of the F line of rabbet joint, thus can make the small volume of the double frequency-band band stop filter prepared, and selectivity is better, simultaneously convenient adjustment and analysis.
Preferred, vertical range, the vertical range between the C line of rabbet joint with the G line of rabbet joint and the vertical range between the G line of rabbet joint with the E line of rabbet joint between the other end of the described A line of rabbet joint and the vertical range between the C line of rabbet joint, the G line of rabbet joint and the D line of rabbet joint are all equal.Thus making the small volume of the double frequency-band band stop filter prepared, selectivity is better, simultaneously convenient adjustment and analysis.
In the utility model, realize respectively carrying out independent regulation to the size of two stopband center frequencies by the length of the A line of rabbet joint on regulated ground plate and microstrip line, the C line of rabbet joint or the E line of rabbet joint.
In the utility model, the described A line of rabbet joint, the B line of rabbet joint, the C line of rabbet joint, the D line of rabbet joint, the E line of rabbet joint, the F line of rabbet joint are all identical with the live width of the G line of rabbet joint, realize respectively carrying out independent regulation to the size of two bandwidth of rejection by the line of rabbet joint live width on regulated ground plate and microstrip line.
Preferred, the dielectric constant of described medium substrate is 2.65, and the thickness of medium substrate is 1.6mm; The width of microstrip line is 4.3mm, and counterpart impedance is 50 ohm; For ground plate, described live width is 0.5mm, vertical range between the other end of the vertical range between the A line of rabbet joint and the C line of rabbet joint, the G line of rabbet joint and the D line of rabbet joint, the vertical range between the C line of rabbet joint and the G line of rabbet joint and the vertical range between the G line of rabbet joint and the E line of rabbet joint are 0.5mm, and the length of the A line of rabbet joint, the C line of rabbet joint or the E line of rabbet joint is 9mm; Distance between 2 ground plates is 3mm; For microstrip line, described live width is 0.4mm, vertical range between the other end of the vertical range between the A line of rabbet joint and the C line of rabbet joint, the G line of rabbet joint and the D line of rabbet joint, the vertical range between the C line of rabbet joint and the G line of rabbet joint and the vertical range between the G line of rabbet joint and the E line of rabbet joint are 0.4mm, and the length of the A line of rabbet joint, the C line of rabbet joint or the E line of rabbet joint is 6mm; Distance between 2 ground plates is 4mm, thus can prepare the double frequency-band band stop filter of function admirable, and this double frequency-band band stop filter is in first stopband, from 3.19GHz to 3.41GHz, insertion loss is less than-20dB, and clawback loss is greater than-0.9dB; In second stopband, clawback loss is less than-30dB, and clawback loss is greater than-1dB; And have three reflection zeros, lay respectively at 3.09GHz, 4.65GHz and 5.34GHz, thus selectivity is very good.
The material of described coat of metal ground plate and metal micro-strip line adopts above copper or copper gold-plated, thus makes it possess good electric conductivity.
Compared with prior art, the utility model is by utilizing the ground plate and microstrip line formation double frequency-band band stop filter that are etched with δ shape defect sturcture, this double frequency-band band stop filter has reflection zero outward at each stopband, thus effectively improves the selectivity characteristic of double frequency-band band stop filter; In addition, the centre frequency of two stopbands of the utility model double frequency-band band stop filter can realize independent regulation by the length changing defected microstrip structure and defect ground structure, two bandwidth can realize independent regulation by the gap width changing defected microstrip structure and defect ground structure, thus make this double frequency-band band stop filter be more suitable for practical application; In addition, the utility model is by cascade two δ shape defected microstrip structures and cascade two δ shape defect ground structure design double frequency-band band stop filters, there are three reflection zeros to be positioned at outside stopband, thus further improve the performance of filter, improve the selectivity characteristic of filter.Finally, the double frequency-band band stop filter structure in the utility model is compact, and filter circuit is less relative to existing T-shaped defect sturcture, U-shaped defect sturcture, π shape defect sturcture, can better meet the requirement of filter miniaturization.In addition, in the utility model, the dielectric constant of described medium substrate is 2.65, and the thickness of medium substrate is 1.6mm; The width of microstrip line is 4.3mm, and counterpart impedance is 50 ohm; For ground plate, described live width is 0.5mm, vertical range between the other end of the vertical range between the A line of rabbet joint and the C line of rabbet joint, the G line of rabbet joint and the D line of rabbet joint, the vertical range between the C line of rabbet joint and the G line of rabbet joint and the vertical range between the G line of rabbet joint and the E line of rabbet joint are 0.5mm, and the length of the A line of rabbet joint, the C line of rabbet joint or the E line of rabbet joint is 9mm; Distance between 2 ground plates is 3mm; For microstrip line, described live width is 0.4mm, vertical range between the other end of the vertical range between the A line of rabbet joint and the C line of rabbet joint, the G line of rabbet joint and the D line of rabbet joint, the vertical range between the C line of rabbet joint and the G line of rabbet joint and the vertical range between the G line of rabbet joint and the E line of rabbet joint are 0.4mm, and the length of the A line of rabbet joint, the C line of rabbet joint or the E line of rabbet joint is 6mm; Distance between 2 ground plates is 4mm, thus can prepare the double frequency-band band stop filter of function admirable, and this double frequency-band band stop filter is in first stopband, from 3.19GHz to 3.41GHz, insertion loss is less than-20dB, and clawback loss is greater than-0.9dB; In second stopband, clawback loss is less than-30dB, and clawback loss is greater than-1dB; And have three reflection zeros, lay respectively at 3.09GHz, 4.65GHz and 5.34GHz, thus selectivity is very good.In addition, the δ shape defect sturcture in the utility model compared with existing U-shaped defect sturcture, because δ shape defect sturcture total length when same length a is larger, therefore, when realizing same band stop filter, the area of δ shape defect sturcture is less, more meets the requirement of filter miniaturization.
In order to verify above-mentioned effect, the present inventor has also carried out following experimental study:
1, δ shape defect sturcture and resonance characteristic
The δ shape defect sturcture that the utility model proposes is made up of δ shape defected microstrip structure and δ shape defect ground structure, and as shown in Figure 1, δ shape defect ground structure as shown in Figure 2 for described δ shape defected microstrip structure; The dielectric constant of the medium substrate adopted is 2.65, and the thickness of medium substrate is 1.6mm.In FIG, the width of described microstrip line is 4.3mm, and corresponding impedance is 50 ohm, and other parameter is: a1=6mm, b1=0.4mm, c1=0.4mm; In Fig. 2, a2=9mm, b2=0.5mm, c2=0.5mm.By the resonance characteristic of electromagnetic simulation software HFSS simulation analysis resonator.Result shows: as shown in Figure 3, Figure 4 (wherein, abscissa is frequency, and unit is GHz, and ordinate is insertion loss S21, and unit is dB), when a1 increases, second resonance frequency moves to low frequency, and first resonance frequency is substantially constant; When a2 increases, first resonance frequency moves to low frequency, and second resonance frequency is substantially constant, and that is first resonance frequency depends on a2, second resonance frequency depends on a1, and double frequency-band band stop filter of the present utility model achieves the independent regulation of two resonance frequencys.
2, design of filter
Adopt the patten's design double frequency-band band stop filter of defected microstrip structure and defect ground structure parallel connection, this filter is two-sided parallel-connection structure, can not increase the area of filter.By cascade two δ shape defected microstrip structures and cascade two δ shape defect ground structure design double frequency-band band stop filters.As shown in Figure 5, Figure 6, the spacing between two δ shape defected microstrip structures is k1=4mm, and the spacing between two defect ground structures is k2=3mm.The centre frequency (i.e. resonance frequency) of double frequency-band band stop filter can realize independent regulation by changing resonator length a1 and a2.In addition, inventor is studied two of double frequency-band band stop filter bandwidth of rejection, result shows: as Fig. 7 (wherein, c1 is 0.4 millimeter of corresponding simulation result is dotted line, c1 is 0.5 millimeter of corresponding simulation result is solid line (wherein c2 remains unchanged), abscissa is frequency, unit is GHz, ordinate is amplitude, unit is dB), Fig. 8 (wherein, c2 is 0.4 millimeter of corresponding simulation result is dotted line, c2 is 0.5 millimeter of corresponding simulation result is solid line (wherein c1 remains unchanged), abscissa is frequency, unit is GHz, ordinate is amplitude, unit is dB) shown in, the bandwidth of rejection of double frequency-band band stop filter is relevant to gap width, along with the increase of c1, second bandwidth of rejection also increases, and first bandwidth of rejection is substantially constant, along with the increase of c2, first bandwidth of rejection increases, and second bandwidth of rejection is substantially constant, and that is, first bandwidth of rejection depends on c2, and second bandwidth of rejection depends on c1.
3, emulation and test
In order to verify simulation result, inventor makes and tests the filter that the utility model proposes.Test result shows: as shown in Fig. 9 (wherein, dotted line is simulation result, and solid line is test result), in first stopband, from 3.19GHz to 3.41GHz, insertion loss is less than-20dB, and clawback loss is greater than-0.9dB; In second stopband, clawback loss is less than-30dB, and clawback loss is greater than-1dB.Have three reflection zeros, lay respectively at 3.09GHz, 4.65GHz and 5.34GHz, thus the selectivity characteristic of filter is better, and small volume.Simulation result and test result are substantially consistent.Little frequency shift (FS), the difference of insertion loss and clawback loss is because the error in making causes.
In addition, show through experimental study: the double frequency-band band stop filter (as shown in figure 11) utilizing 1 δ shape defected microstrip structure cascade, 1 δ shape defect ground structure design, it does not have reflection zero, and thus the selectivity of filter is slightly poor; By cascade two δ shape defected microstrip structures and cascade two δ shape defect ground structure design double frequency-band band stop filters, have three reflection zeros to be positioned at outside stopband, the selectivity characteristic of filter is better, and small volume; By cascade two or more δ shape defected microstrip structure and cascade two or more δ shape defect ground structure design double frequency-band band stop filter (three the δ shape defected microstrip structures of cascade as shown in Figure 10 and cascade three δ shape defect ground structure design double frequency-band band stop filters), volume not only can be caused to increase, and the structure simultaneously increased causes the deterioration of the outer performance of stopband while performance improving in stopband.Therefore, best by the selectivity characteristic of cascade two δ shape defected microstrip structures and cascade two δ shape defect ground structure design double frequency-band band stop filters, small volume simultaneously.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of δ shape defected microstrip structure;
Fig. 2 is the schematic diagram of δ shape defect ground structure;
Insertion loss simulation result schematic diagram (wherein a2 remains unchanged) of the defected microstrip structure that Fig. 3 different length a1 is corresponding;
Fig. 4 is the insertion loss simulation result schematic diagram (wherein a1 remains unchanged) of the defect ground structure that different length a2 is corresponding; Fig. 5 is two δ shape defected microstrip structure cascade schematic diagrames;
Fig. 6 is two δ shape defect ground structure cascade schematic diagrames;
Fig. 7 is c1 simulation result schematic diagram (wherein c2 remains unchanged) corresponding when being different size;
Fig. 8 is c2 simulation result schematic diagram (wherein c1 remains unchanged) corresponding when being different size;
Fig. 9 is resonance characteristic simulation result and the test result comparison diagram of the double frequency-band band stop filter of cascade two δ shape defected microstrip structures and cascade two δ shape defect ground structure designs;
Figure 10 is the resonance characteristic simulation result schematic diagram of cascade three δ shape defected microstrip structures and cascade three δ shape defect ground structure design double frequency-band band stop filters;
Figure 11 is the resonance characteristic simulation result schematic diagram of the double frequency-band band stop filter utilizing a δ shape defected microstrip structure and a δ shape defect ground structure design;
Figure 12 is the front view of double frequency-band band stop filter of the present utility model.
Reference numeral: 1-medium substrate, 2-ground plate, 3-microstrip line, the 101-A line of rabbet joint, the 102-B line of rabbet joint, the 103-C line of rabbet joint, the 104-D line of rabbet joint, the 105-E line of rabbet joint, the 106-F line of rabbet joint, the 107-G line of rabbet joint.
Below in conjunction with the drawings and specific embodiments, the utility model is further described.
Embodiment
Embodiment 1 of the present utility model: based on the double frequency-band band stop filter of defected microstrip structure and defect ground structure, as shown in Figure 1, Figure 2, shown in Fig. 5, Fig. 6, Figure 12, comprise: medium substrate 1, the metal micro-strip line 3 be located at the coat of metal ground plate 2 on medium substrate 1 bottom surface and be located at above medium substrate 1, described ground plate 2 and microstrip line 3 are all etched with δ shape defect sturcture.Described ground plate 2 and microstrip line 3 are all etched with 2 δ shape defect sturctures, 2 the δ shape defect sturctures cascade on ground plate 2,2 the δ shape defect sturctures cascade on microstrip line 3.Described δ shape defect sturcture is δ shape groove, comprise the A line of rabbet joint 101, the B line of rabbet joint 102, the C line of rabbet joint 103, the D line of rabbet joint 104, the E line of rabbet joint 105, the F line of rabbet joint 106 and the G line of rabbet joint 107, the two ends of the described B line of rabbet joint 102 are connected with one end of the A line of rabbet joint 101 and the C line of rabbet joint 103 respectively, the two ends of the D line of rabbet joint 104 are connected with one end of the E line of rabbet joint 105 and the other end of the C line of rabbet joint 103 respectively, and the two ends of the F line of rabbet joint 106 are connected with one end of the G line of rabbet joint 107 and the other end of the E line of rabbet joint 105 respectively; The described A line of rabbet joint 101, the C line of rabbet joint 103, be parallel to each other between the E line of rabbet joint 105 and the G line of rabbet joint 107, the D line of rabbet joint 104 is parallel with the F line of rabbet joint 106 with the B line of rabbet joint 102 respectively; The described B line of rabbet joint 102 is vertical with the C line of rabbet joint 103 with the A line of rabbet joint 101 respectively, and the D line of rabbet joint 104 is vertical with the E line of rabbet joint 105 with the C line of rabbet joint 103 respectively, and the F line of rabbet joint 106 is vertical with the G line of rabbet joint 107 with the E line of rabbet joint 105 respectively.The described A line of rabbet joint 101, the C line of rabbet joint 103 are identical with the length of the E line of rabbet joint 105; The B line of rabbet joint 102 is identical with the length of the F line of rabbet joint 106.Vertical range, the vertical range between the C line of rabbet joint 103 with the G line of rabbet joint 107 and the vertical range between the G line of rabbet joint 107 with the E line of rabbet joint 105 between the other end of the described A line of rabbet joint 101 and the vertical range between the C line of rabbet joint 103, the G line of rabbet joint 107 and the D line of rabbet joint 104 are all equal.The described A line of rabbet joint 101, the B line of rabbet joint 102, the C line of rabbet joint 103, the D line of rabbet joint 104, the E line of rabbet joint 105, the F line of rabbet joint 106 are all identical with the live width of the G line of rabbet joint 107.The dielectric constant of described medium substrate 1 is 2.65, and the thickness of medium substrate 1 is 1.6mm; The width of microstrip line 3 is 4.3mm, and counterpart impedance is 50 ohm; For ground plate 2, described live width is that the vertical range between the other end of vertical range between 0.5mm, the A line of rabbet joint 101 and the C line of rabbet joint 103 or the G line of rabbet joint 107 and the D line of rabbet joint 104 is 0.5mm, the A line of rabbet joint 101, the length of the C line of rabbet joint 103 or the E line of rabbet joint 105 is 9mm; Distance between 2 ground plates 2 is 3mm; For microstrip line 3, described live width is that the vertical range between the other end of vertical range between 0.4mm, the A line of rabbet joint 101 and the C line of rabbet joint 103 or the G line of rabbet joint 107 and the D line of rabbet joint 104 is 0.4mm, the A line of rabbet joint 101, the length of the C line of rabbet joint 103 or the E line of rabbet joint 105 is 6mm; Distance between 2 ground plates 2 is 4mm.
Embodiment 2: based on the double frequency-band band stop filter of defected microstrip structure and defect ground structure, comprise: medium substrate 1, the metal micro-strip line 3 be located at the coat of metal ground plate 2 on medium substrate 1 bottom surface and be located at above medium substrate 1, described ground plate 2 and microstrip line 3 are all etched with δ shape defect sturcture.Described ground plate 2 and microstrip line 3 are all etched with 2 δ shape defect sturctures, 2 the δ shape defect sturctures cascade on ground plate 2,2 the δ shape defect sturctures cascade on microstrip line 3.Described δ shape defect sturcture is δ shape groove, comprise the A line of rabbet joint 101, the B line of rabbet joint 102, the C line of rabbet joint 103, the D line of rabbet joint 104, the E line of rabbet joint 105, the F line of rabbet joint 106 and the G line of rabbet joint 107, the two ends of the described B line of rabbet joint 102 are connected with one end of the A line of rabbet joint 101 and the C line of rabbet joint 103 respectively, the two ends of the D line of rabbet joint 104 are connected with one end of the E line of rabbet joint 105 and the other end of the C line of rabbet joint 103 respectively, and the two ends of the F line of rabbet joint 106 are connected with one end of the G line of rabbet joint 107 and the other end of the E line of rabbet joint 105 respectively; The described A line of rabbet joint 101, the C line of rabbet joint 103, be parallel to each other between the E line of rabbet joint 105 and the G line of rabbet joint 107, the D line of rabbet joint 104 is parallel with the F line of rabbet joint 106 with the B line of rabbet joint 102 respectively; The described B line of rabbet joint 102 is vertical with the C line of rabbet joint 103 with the A line of rabbet joint 101 respectively, and the D line of rabbet joint 104 is vertical with the E line of rabbet joint 105 with the C line of rabbet joint 103 respectively, and the F line of rabbet joint 106 is vertical with the G line of rabbet joint 107 with the E line of rabbet joint 105 respectively.The described A line of rabbet joint 101, the C line of rabbet joint 103 are identical with the length of the E line of rabbet joint 105; The B line of rabbet joint 102 is identical with the length of the F line of rabbet joint 106.Vertical range, the vertical range between the C line of rabbet joint 103 with the G line of rabbet joint 107 and the vertical range between the G line of rabbet joint 107 with the E line of rabbet joint 105 between the other end of the described A line of rabbet joint 101 and the vertical range between the C line of rabbet joint 103, the G line of rabbet joint 107 and the D line of rabbet joint 104 are all equal.The described A line of rabbet joint 101, the B line of rabbet joint 102, the C line of rabbet joint 103, the D line of rabbet joint 104, the E line of rabbet joint 105, the F line of rabbet joint 106 are all identical with the live width of the G line of rabbet joint 107.
Embodiment 3: based on the double frequency-band band stop filter of defected microstrip structure and defect ground structure, comprise: medium substrate 1, the metal micro-strip line 3 be located at the coat of metal ground plate 2 on medium substrate 1 bottom surface and be located at above medium substrate 1, described ground plate 2 and microstrip line 3 are all etched with δ shape defect sturcture.Described δ shape defect sturcture is δ shape groove, comprise the A line of rabbet joint 101, the B line of rabbet joint 102, the C line of rabbet joint 103, the D line of rabbet joint 104, the E line of rabbet joint 105, the F line of rabbet joint 106 and the G line of rabbet joint 107, the two ends of the described B line of rabbet joint 102 are connected with one end of the A line of rabbet joint 101 and the C line of rabbet joint 103 respectively, the two ends of the D line of rabbet joint 104 are connected with one end of the E line of rabbet joint 105 and the other end of the C line of rabbet joint 103 respectively, and the two ends of the F line of rabbet joint 106 are connected with one end of the G line of rabbet joint 107 and the other end of the E line of rabbet joint 105 respectively; The described A line of rabbet joint 101, the C line of rabbet joint 103, be parallel to each other between the E line of rabbet joint 105 and the G line of rabbet joint 107, the D line of rabbet joint 104 is parallel with the F line of rabbet joint 106 with the B line of rabbet joint 102 respectively; The described B line of rabbet joint 102 is vertical with the C line of rabbet joint 103 with the A line of rabbet joint 101 respectively, and the D line of rabbet joint 104 is vertical with the E line of rabbet joint 105 with the C line of rabbet joint 103 respectively, and the F line of rabbet joint 106 is vertical with the G line of rabbet joint 107 with the E line of rabbet joint 105 respectively.The described A line of rabbet joint 101, the C line of rabbet joint 103 are identical with the length of the E line of rabbet joint 105; The B line of rabbet joint 102 is identical with the length of the F line of rabbet joint 106.Vertical range, the vertical range between the C line of rabbet joint 103 with the G line of rabbet joint 107 and the vertical range between the G line of rabbet joint 107 with the E line of rabbet joint 105 between the other end of the described A line of rabbet joint 101 and the vertical range between the C line of rabbet joint 103, the G line of rabbet joint 107 and the D line of rabbet joint 104 are all equal.The described A line of rabbet joint 101, the B line of rabbet joint 102, the C line of rabbet joint 103, the D line of rabbet joint 104, the E line of rabbet joint 105, the F line of rabbet joint 106 are all identical with the live width of the G line of rabbet joint 107.
Claims (8)
1. based on the double frequency-band band stop filter of defected microstrip structure and defect ground structure, it is characterized in that, comprise: medium substrate (1), the metal micro-strip line (3) be located at the coat of metal ground plate (2) on medium substrate (1) bottom surface and be located at above medium substrate (1), described ground plate (2) and microstrip line (3) are all etched with δ shape defect sturcture.
2. the double frequency-band band stop filter based on defected microstrip structure and defect ground structure according to claim 1, it is characterized in that, described ground plate (2) and microstrip line (3) are all etched with multiple δ shape defect sturcture, multiple δ shape defect sturcture cascade on ground plate (2), the multiple δ shape defect sturcture cascade on microstrip line (3).
3. the double frequency-band band stop filter based on defected microstrip structure and defect ground structure according to claim 2, is characterized in that, described ground plate (2) and microstrip line (3) are all etched with 2 δ shape defect sturctures.
4. the double frequency-band band stop filter based on defected microstrip structure and defect ground structure according to any one of claims 1 to 3, it is characterized in that, described δ shape defect sturcture is δ shape groove, comprise the A line of rabbet joint (101), the B line of rabbet joint (102), the C line of rabbet joint (103), the D line of rabbet joint (104), the E line of rabbet joint (105), the F line of rabbet joint (106) and the G line of rabbet joint (107), the two ends of the described B line of rabbet joint (102) are connected with one end of the A line of rabbet joint (101) and the C line of rabbet joint (103) respectively, the two ends of the D line of rabbet joint (104) are connected with one end of the E line of rabbet joint (105) and the other end of the C line of rabbet joint (103) respectively, the two ends of the F line of rabbet joint (106) are connected with one end of the G line of rabbet joint (107) and the other end of the E line of rabbet joint (105) respectively, the described A line of rabbet joint (101), the C line of rabbet joint (103), be parallel to each other between the E line of rabbet joint (105) and the G line of rabbet joint (107), the D line of rabbet joint (104) is parallel with the F line of rabbet joint (106) with the B line of rabbet joint (102) respectively, the described B line of rabbet joint (102) is vertical with the C line of rabbet joint (103) with the A line of rabbet joint (101) respectively, the D line of rabbet joint (104) is vertical with the E line of rabbet joint (105) with the C line of rabbet joint (103) respectively, and the F line of rabbet joint (106) is vertical with the G line of rabbet joint (107) with the E line of rabbet joint (105) respectively.
5. the double frequency-band band stop filter based on defected microstrip structure and defect ground structure according to claim 4, it is characterized in that, the described A line of rabbet joint (101), the C line of rabbet joint (103) are identical with the length of the E line of rabbet joint (105); The B line of rabbet joint (102) is identical with the length of the F line of rabbet joint (106).
6. the double frequency-band band stop filter based on defected microstrip structure and defect ground structure according to claim 5, it is characterized in that, vertical range, the vertical range between the C line of rabbet joint (103) with the G line of rabbet joint (107) and the vertical range between the G line of rabbet joint (107) with the E line of rabbet joint (105) between the other end of the described A line of rabbet joint (101) and the vertical range between the C line of rabbet joint (103), the G line of rabbet joint (107) and the D line of rabbet joint (104) are all equal.
7. the double frequency-band band stop filter based on defected microstrip structure and defect ground structure according to claim 5 or 6, it is characterized in that, the described A line of rabbet joint (101), the B line of rabbet joint (102), the C line of rabbet joint (103), the D line of rabbet joint (104), the E line of rabbet joint (105), the F line of rabbet joint (106) are all identical with the live width of the G line of rabbet joint (107).
8. the double frequency-band band stop filter based on defected microstrip structure and defect ground structure according to claim 6, it is characterized in that, the dielectric constant of described medium substrate (1) is 2.65, and the thickness of medium substrate (1) is 1.6mm; The width of microstrip line (3) is 4.3mm, and counterpart impedance is 50 ohm; For ground plate (2), described live width is 0.5mm, vertical range between the other end of the vertical range between the A line of rabbet joint (101) and the C line of rabbet joint (103), the G line of rabbet joint (107) and the D line of rabbet joint (104), the vertical range between the C line of rabbet joint (103) and the G line of rabbet joint (107) and the vertical range between the G line of rabbet joint (107) and the E line of rabbet joint (105) are 0.5mm, and the length of the A line of rabbet joint (101), the C line of rabbet joint (103) or the E line of rabbet joint (105) is 9mm; Distance between 2 ground plates (2) is 3mm; For microstrip line (3), described live width is 0.4mm, vertical range between the other end of the vertical range between the A line of rabbet joint (101) and the C line of rabbet joint (103), the G line of rabbet joint (107) and the D line of rabbet joint (104), the vertical range between the C line of rabbet joint (103) and the G line of rabbet joint (107) and the vertical range between the G line of rabbet joint (107) and the E line of rabbet joint (105) are 0.4mm, and the length of the A line of rabbet joint (101), the C line of rabbet joint (103) or the E line of rabbet joint (105) is 6mm; Distance between 2 ground plates (2) is 4mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520533104.9U CN204991908U (en) | 2015-07-22 | 2015-07-22 | Double frequency -band band elimination filter based on defect microstrip structure and defect ground structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520533104.9U CN204991908U (en) | 2015-07-22 | 2015-07-22 | Double frequency -band band elimination filter based on defect microstrip structure and defect ground structure |
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| CN204991908U true CN204991908U (en) | 2016-01-20 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104966873A (en) * | 2015-07-22 | 2015-10-07 | 东北大学 | Dual-band band-rejection filter based on defected microstrip structure and defected ground structure |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104966873A (en) * | 2015-07-22 | 2015-10-07 | 东北大学 | Dual-band band-rejection filter based on defected microstrip structure and defected ground structure |
| CN104966873B (en) * | 2015-07-22 | 2018-07-10 | 东北大学 | Double frequency-band bandstop filter based on defected microstrip structure and defect ground structure |
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