CN104134837A - A Planar CQ Bandpass Filter - Google Patents
A Planar CQ Bandpass Filter Download PDFInfo
- Publication number
- CN104134837A CN104134837A CN201410348611.5A CN201410348611A CN104134837A CN 104134837 A CN104134837 A CN 104134837A CN 201410348611 A CN201410348611 A CN 201410348611A CN 104134837 A CN104134837 A CN 104134837A
- Authority
- CN
- China
- Prior art keywords
- micro
- band
- strip resonantor
- feeder line
- longitudinal
- 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.)
- Granted
Links
Landscapes
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
The invention relates to a planar CQ band-pass filter which is manufactured on a double-sided copper-clad microstrip plate in a printed circuit board mode, wherein an input end feeder head port1 for inputting electromagnetic wave signals, an output end feeder head port2 for outputting the electromagnetic wave signals, first and second port feeders, half-wavelength first and fourth microstrip resonators, quarter-wavelength second and third microstrip resonators and a ground through hole are respectively manufactured on the same side of the double-sided copper-clad microstrip plate, and the other side of the microstrip plate is a copper-clad ground plate. The invention is composed of two half-wavelength resonators and two quarter-wavelength resonators in cascade connection, so that the filter can have simple and controllable electric coupling and magnetic coupling under the condition of keeping smaller volume; two transmission zero points can be generated on two sides of the passband of the filter by introducing cross coupling between the resonators, so that the frequency selectivity and out-of-band rejection of the filter are improved, and the filter has the advantages of good frequency band selectivity, low insertion loss, small volume and simple structure.
Description
Technical field
The present invention relates to the plane bandpass filter of microstrip line form, relate in particular to a kind of plane CQ band pass filter, can meet the designing requirements such as frequency selectivity is high, insertion loss is low, size is little, simple in structure, cost is low.
Background technology
RF/Microwave filter is the requisite parts of system such as modern microwave trunking traffic, satellite communication, radio communication and electronic countermeasures, is also the most important and the highest microwave passive component of technology content simultaneously.Wherein, band pass filter is as one of part important in Circuits System, and the quality of its performance has largely determined the work quality of system.Band pass filter operates mainly in communication system radio-frequency front-end, for low-loss, by the useful signal in a certain frequency range, and the frequency component of other frequency ranges is decayed to extremely low-level.
Yet, along with the high speed development of modern communications demand, available frequency spectrum resource growing tension is therefore more and more higher to the requirement of filter frequencies selectivity characteristic.In order to improve message capacity and to avoid the interference between adjacent channel, require filter must have precipitous Out-of-band rejection; In order to improve signal to noise ratio, requiring will have low insertion loss in passband; And in order to reduce the distortion of signal, requiring has smooth amplitude-frequency characteristic and group delay characteristic in passband; In order to meet modern communications terminal trend toward miniaturization, require filter to have less volume and weight.Traditional Butterworth and Chebyshev filter have been difficult to meet these requirements, the filter of introducing the cross coupling structure with limited transmission zero be at present the most frequently used be also best selection.Compare with conventional filter, this filter not only can meet the high selectivity characteristic outside passband, can reduce the number of resonant cavity simultaneously, reduces design cost and filter volume.So far, had a lot of scholars to propose the band pass filter with cross coupling structure based on four resonator element cascades, wherein some shows good performance really: in-band insertion loss is less, selectivity is more high.Yet certain structures, owing to adopting half-wave resonator structure to make filter volume excessive, is unfavorable for integrated.In addition,, although adopt quarter-wave resonance device structure to reduce filter volume, can make the design of coupled structure become complicated.
Summary of the invention
The shortcoming that the object of the invention is to overcome prior art is with not enough, a kind of plane CQ band pass filter is provided, this disclosure of the invention a kind of new method of utilizing two half-wave resonator and two quarter-wave resonance devices to form the band pass filter of four resonator element cascades, this makes filter except reaching at aspect of performance the requirement that frequency selectivity is high, insertion loss is little, in the complexity of filter size and coupled structure design, all than traditional structure, has more advantage.Filter of the present invention, based on CQ (Cascaded Quadruplet) filter construction, is introduced cross-couplings and is made to produce two transmission zeros outside passband between resonator, thereby reach fast, roll-offs, and improves optionally object.
Object of the present invention is achieved through the following technical solutions:
A kind of plane CQ band pass filter, mode with printed circuit board (PCB) is produced on the micro-band plate of two-sided shoe copper, on the same face of the micro-band plate of described double-sided copper-clad, be manufactured with respectively input feeder line head port1 for inputting electromagnetic wave signal, for exporting output feeder line head port2, the first port feeder line, the second port feeder line of electromagnetic wave signal, the first micro-strip resonantor of half-wavelength and the 4th micro-strip resonantor, quarter-wave the second micro-strip resonantor and the 3rd micro-strip resonantor, grounding through hole, the another side of the micro-band plate of this double-sided copper-clad is for covering copper ground plate; And described input feeder line head port1, the first port feeder line, the first micro-strip resonantor, the second micro-strip resonantor and output feeder line head port2, the second port feeder line, the 4th micro-strip resonantor, the 3rd micro-strip resonantor are symmetrical; The first micro-strip resonantor, the second micro-strip resonantor, the 3rd micro-strip resonantor, the 4th micro-strip resonantor are between parallel the first port feeder line and the second port feeder line; Described the first micro-strip resonantor and the 4th micro-strip resonantor are all comprised of five micro-bands, wherein three are parallel to the first port feeder line and the second port feeder line longitudinally, two other is perpendicular to the first port feeder line and the second port feeder line longitudinally, the two ends of long horizontal micro-band respectively with vertical connection of bottom of longitudinal micro-band of the longest longitudinal micro-band and moderate-length, the two ends of shorter horizontal micro-band respectively with vertical connection of top of longitudinal micro-band of the shortest longitudinal micro-band and moderate-length; The longest longitudinal micro-band of the first micro-strip resonantor and the 4th micro-strip resonantor is respectively and the first port feeder line and the nearest longitudinal micro-band of the second port feeder line, in the first micro-strip resonantor, between the longest longitudinal micro-band and the first port feeder line, there is the first coupling gap, in the 4th micro-strip resonantor, between the longest longitudinal micro-band and the second port feeder line, there is the second coupling gap, between the first micro-strip resonantor and the shortest longitudinal micro-band of the 4th micro-strip resonantor, have the 3rd coupling gap; The second described micro-strip resonantor and the 3rd micro-strip resonantor are all comprised of three micro-bands, wherein two rules are parallel to the first port feeder line and the second port feeder line longitudinally, other one perpendicular to the first port feeder line and the second port feeder line longitudinally, the two ends of horizontal micro-band respectively with vertical connection of top of long longitudinal micro-band and shorter longitudinal micro-band; Between described the second micro-strip resonantor and shorter longitudinal micro-band of the 3rd micro-strip resonantor, there is the 4th coupling gap, their bottom connects by grounding through hole, be to introduce magnetic coupling between the second micro-strip resonantor and the 3rd micro-strip resonantor, and their bottom is positioned at the top of shorter horizontal micro-band of the first micro-strip resonantor and the 4th micro-strip resonantor; Long longitudinal micro-band of described the second micro-strip resonantor and the 3rd micro-strip resonantor lays respectively between the longest longitudinal micro-band and medium longitudinal micro-band of the first micro-strip resonantor and the 4th micro-strip resonantor, and between the medium longitudinal micro-band of long longitudinal micro-band of described the second micro-strip resonantor and the first micro-strip resonantor, there is the 5th coupling gap, between the medium longitudinal micro-band of long longitudinal micro-band of described the 3rd micro-strip resonantor and the 4th micro-strip resonantor, have the 6th coupling gap; Long horizontal micro-band of described the first micro-strip resonantor and the 4th micro-strip resonantor is positioned at long longitudinal micro-below with bottom of the below of the first port feeder line, the second port feeder line bottom and described the second micro-strip resonantor, the 3rd micro-strip resonantor simultaneously.
Preferably, the width of described input feeder line head port1 and output feeder line head port2 is W
1=2.2mm, the length of the first port feeder line and the second port feeder line is L
1=15.2mm, width are W
3=0.5mm.
Preferably, the length of the longest longitudinal micro-band of described the first micro-strip resonantor and the 4th micro-strip resonantor is L2=17.2mm, the length of medium longitudinal micro-band is L4=8mm, the length of the shortest longitudinal micro-band is L6=0.5mm, the length of long horizontal micro-band is L3=6mm, and the length of shorter horizontal micro-band is L5=2.9mm.
Preferably, the length of longitudinal micro-band of growing of described the second micro-strip resonantor and the 3rd micro-strip resonantor is L7=12.45mm, width is W2=1mm, and the length of shorter longitudinal micro-band is L9=3mm, and the length of horizontal micro-band is L8=2.5mm.
Preferably, described input feeder line head port1 and output feeder line head port2 are the matched impedance of 50 ohm.
Preferably, the distance S of described the 4th coupling gap
3for 0.5mm.
Preferably, the distance S of described the 3rd coupling gap
4for 0.7mm.
Preferably, the distance S of described the 5th coupling gap and the 6th coupling gap
2be 0.5mm.
Preferably, the distance S of described the first coupling gap and the second coupling gap
1be 0.3mm.
Preferably, the micro-relative dielectric constant with base board of described two-sided shoe copper is 2.55, and medium height is 0.80mm.
The present invention has following advantage and effect with respect to prior art:
1, the present invention adopts half-wave resonator and quarter-wave resonance device to form CQ unit, the CQ unit being formed by half-wave resonator before comparing, size is less, and before comparing, only has quarter-wave resonance device to form CQ unit, and the design of coupled structure is simpler.
2, the present invention mixes use half-wave resonator and quarter-wave resonance device, can realize more easily independent controlled electric coupling and magnetic coupling, thereby in passband both sides, produces 2 transmission zeros, thereby improves the selectivity of filter.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of a kind of plane CQ band pass filter of proposing of the present invention;
Fig. 2 is the dimensional drawing of a kind of plane CQ band pass filter of proposing of the present invention;
Fig. 3 is the scattering parameter analogous diagram of a kind of plane CQ band pass filter of proposing of the present invention;
In figure, Reference numeral is: the micro-band plate of the two-sided shoe copper of 1-, 2-the first port feeder line, 3-the first coupling gap, 4-the first micro-strip resonantor, 5-the 5th coupling gap, 6-the 3rd micro-strip resonantor, 7-the 4th coupling gap, 8-grounding through hole, 9-the 3rd coupling gap, 10-the 4th micro-strip resonantor, 11-the 6th coupling gap, 12-the 4th micro-strip resonantor, 13-the second coupling gap, 14-the second port feeder line.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the present invention is described in further detail, but embodiments of the present invention are not limited to this.
Embodiment
The schematic diagram of plane CQ band pass filter of the present invention as shown in Figure 1, mode with printed circuit board (PCB) is produced on the micro-band plate 1 of two-sided shoe copper, on the same face of the micro-band plate 1 of described double-sided copper-clad, be manufactured with respectively for inputting the input feeder line head port1 of electromagnetic wave signal, for exporting the output feeder line head port2 of electromagnetic wave signal, the first port feeder line 2, the second port feeder line 14, the first micro-strip resonantor 4 of half-wavelength and the 4th micro-strip resonantor 12, quarter-wave the second micro-strip resonantor 6 and the 3rd micro-strip resonantor 10, grounding through hole 8, the another side of the micro-band plate 1 of this double-sided copper-clad is for covering copper ground plate, and described input feeder line head port1, the first port feeder line 2, the first micro-strip resonantor 4, the second micro-strip resonantor 6 and output feeder line head port2, the second port feeder line 14, the 4th micro-strip resonantor 12, the 3rd micro-strip resonantor 10 are symmetrical, and grounding through hole 8 is positioned in centre symmetry line.
The first micro-strip resonantor 4, the second micro-strip resonantor 6, the 3rd micro-strip resonantor 10, the 4th micro-strip resonantor 12 are between parallel the first port feeder line 2 and the second port feeder line 14; Wherein said the first micro-strip resonantor 4 and the 4th micro-strip resonantor 12 are all comprised of five micro-bands, wherein three are parallel to the first port feeder line 2 and the second port feeder line 14 longitudinally, two other is perpendicular to the first port feeder line 2 and the second port feeder line 14 longitudinally, the two ends of long horizontal micro-band respectively with vertical connection of bottom of longitudinal micro-band of the longest longitudinal micro-band and moderate-length, the two ends of shorter horizontal micro-band respectively with vertical connection of top of longitudinal micro-band of the shortest longitudinal micro-band and moderate-length; The longest longitudinal micro-band of the first micro-strip resonantor 4 and the 4th micro-strip resonantor 12 is respectively and the first port feeder line 2 and the nearest longitudinal micro-band of the second port feeder line 14, in the first micro-strip resonantor 4, between the longest longitudinal micro-band and the first port feeder line 2, there is the first coupling gap 3, in the 4th micro-strip resonantor 12, between the longest longitudinal micro-band and the second port feeder line 14, there is the second coupling gap 13, coupling gap 3 and 13 distance equate, this gap distance is all designated as S
1;
Between the shortest longitudinal micro-band of the first micro-strip resonantor 4 and the 4th micro-strip resonantor 12, have the 3rd coupling gap 9, coupling gap 9 is to introduce magnetic coupling between the second micro-strip resonantor (6) and the 3rd micro-strip resonantor (10), and this gap distance is designated as S
4;
Described the second micro-strip resonantor 6 and the 3rd micro-strip resonantor 10 are all comprised of three micro-bands, wherein two rules are parallel to the first port feeder line 2 and the second port feeder line 14 longitudinally, other one perpendicular to the first port feeder line 2 and the second port feeder line 14 longitudinally, the two ends of horizontal micro-band respectively with vertical connection of top of long longitudinal micro-band and shorter longitudinal micro-band; (distance of coupling gap 7 is designated as S between described the second micro-strip resonantor 6 and shorter longitudinal micro-band of the 3rd micro-strip resonantor 10, to have the 4th coupling gap 7
3), their bottom connects by grounding through hole 8, be to introduce magnetic coupling between the second micro-strip resonantor 6 and the 3rd micro-strip resonantor 10, and their bottom is positioned at the top of shorter horizontal micro-band of the first micro-strip resonantor 4 and the 4th micro-strip resonantor 12;
Long longitudinal micro-band of described the second micro-strip resonantor 6 and the 3rd micro-strip resonantor 10 lays respectively between the longest longitudinal micro-band and medium longitudinal micro-band of the first micro-strip resonantor 4 and the 4th micro-strip resonantor 12, and there is the 5th coupling gap 5 between the medium longitudinal micro-band of long longitudinal micro-band of described the second micro-strip resonantor 6 and the first micro-strip resonantor 4, between the medium longitudinal micro-band of long longitudinal micro-band of described the 3rd micro-strip resonantor 10 and the 4th micro-strip resonantor 12, there is the 6th coupling gap 11
The 5th coupling gap 5 and the 6th coupling gap 11 are respectively between the second micro-strip resonantor 6, the 3rd micro-strip resonantor 10 and the second micro-strip resonantor 6 and the 3rd micro-strip resonantor 10 and introduce electric coupling, and coupling gap 5 and 11 distance equate, this gap distance is designated as S
2;
Long horizontal micro-band of described the first micro-strip resonantor 4 and the 4th micro-strip resonantor 12 is positioned at long longitudinal micro-below with bottom of the below of the first port feeder line 2, the second port feeder line 14 bottoms and described the second micro-strip resonantor 6, the 3rd micro-strip resonantor 10 simultaneously.
Input feeder line head port1 is used for inputting electromagnetic wave signal, and output feeder line head port2 is used for exporting electromagnetic wave signal, is the matched impedance of 50 ohm.
The width of input feeder line head port1 and output feeder line head port2 is W
1=2.2mm, the length of the first port feeder line and the second port feeder line is L
1=15.2mm, width are W
3=0.5mm.
Above-mentioned the first micro-strip resonantor 4 and the 4th micro-strip resonantor 12 are mirror image symmetries, the length of longitudinal micro-band that they are the longest is L2=17.2mm, the length of medium longitudinal micro-band is L4=8mm, the length of the shortest longitudinal micro-band is L6=0.5mm, the length of long horizontal micro-band is L3=6mm, and the length of shorter horizontal micro-band is L5=2.9mm.
Above-mentioned the second micro-strip resonantor 6 and the 3rd micro-strip resonantor 10 are also mirror image symmetries, the length of long longitudinal micro-band is L7=12.45mm, width is W2=1mm for they, the length of shorter longitudinal micro-band is L9=3mm, and the length of horizontal micro-band is L8=2.5mm.
The distance S of the first coupling gap (3) and the second coupling gap (13)
1for 0.3mm.
The distance S of the 3rd coupling gap (9)
4for 0.7mm.
The distance S of the 4th coupling gap (7)
3for 0.5mm.
The distance S of the 5th coupling gap (5) and the 6th coupling gap (11)
2for 0.5mm.
Fig. 2 is the dimensional drawing of a kind of plane CQ band pass filter of proposing of the present invention, and this structure chart is symmetrical.
Use three-dimensional artificial software ZELAND IE3D to carry out emulation to filter, it is 2.55 that the filter of the present invention's design uses the relative dielectric constant of micro-belt substrate, and medium height is 0.80mm, and the filter center frequency of design is 3GHz.The main structure parameters of filter is: L
1=15.2mm, L
2=17.2mm, L
3=6mm, L
4=8mm, L
5=2.9mm, L
6=0.5mm, L
7=12.45mm, L
8=2.5mm, L
9=3mm, W
1=2.2mm, W
2=1mm, W
3=0.5mm.
Fig. 3 has shown the scattering parameter simulation result of plane bandpass filter, and frequency range is that 1.2GHz is to 4.8GHz.
Transverse axis represents the frequency input signal of band pass filter of the present invention, and the longitudinal axis represents logarithm amplitude (dB), comprises insertion loss S
21amplitude and return loss S
11amplitude.S
21represent by the input power of signal of band pass filter of the present invention and the relation between the power output of signal, its corresponding mathematical function is: 10*l
g(P
i/ P
o) (dB)=20*lg|S
21|, wherein, P
irepresent input power, P
orepresent power output.In the signals transmission of band pass filter of the present invention, the Partial Power of signal is reflected back toward signal source, and the power being reflected becomes reflection power.S
11represent the input power of signal of band pass filter in the present invention and the relation between the reflection power of signal, its corresponding mathematical function is: 10*lg (P
r/ P
i) (dB)=20*lg|S
11|, wherein, P
rrepresent reflection power, P
irepresent incident power.
As shown in Figure 3, filter center frequency is 3GHz, and insertion loss absolute value is less than 1.5dB, and return loss absolute value is greater than 20dB.In addition, in passband both sides, produce two transmission zeros, improved the frequency selective characteristic of filter.
Above-described embodiment is preferably execution mode of the present invention; but embodiments of the present invention are not restricted to the described embodiments; other any do not deviate from change, the modification done under Spirit Essence of the present invention and principle, substitutes, combination, simplify; all should be equivalent substitute mode, within being included in protection scope of the present invention.
Claims (10)
1. a plane CQ band pass filter, mode with printed circuit board (PCB) is produced on the micro-band plate of two-sided shoe copper (1), it is characterized in that: on the same face of the micro-band plate of described double-sided copper-clad (1), be manufactured with respectively for inputting the input feeder line head port1 of electromagnetic wave signal, for exporting the output feeder line head port2 of electromagnetic wave signal, the first port feeder line (2), the second port feeder line (14), first micro-strip resonantor (4) of half-wavelength and the 4th micro-strip resonantor (12), quarter-wave the second micro-strip resonantor (6) and the 3rd micro-strip resonantor (10), grounding through hole (8), the another side of the micro-band plate of this double-sided copper-clad (1) is for covering copper ground plate, and described input feeder line head port1, the first port feeder line (2), the first micro-strip resonantor (4), the second micro-strip resonantor (6) and output feeder line head port2, the second port feeder line (14), the 4th micro-strip resonantor (12), the 3rd micro-strip resonantor (10) are symmetrical, the first micro-strip resonantor (4), the second micro-strip resonantor (6), the 3rd micro-strip resonantor (10), the 4th micro-strip resonantor (12) are positioned between parallel the first port feeder line (2) and the second port feeder line (14), described the first micro-strip resonantor (4) and the 4th micro-strip resonantor (12) are all comprised of five micro-bands, wherein three are parallel to the first port feeder line (2) and the second port feeder line (14) longitudinally, two other is perpendicular to the first port feeder line (2) and the second port feeder line (14) longitudinally, the two ends of long horizontal micro-band respectively with vertical connection of bottom of longitudinal micro-band of the longest longitudinal micro-band and moderate-length, the two ends of shorter horizontal micro-band respectively with vertical connection of top of longitudinal micro-band of the shortest longitudinal micro-band and moderate-length, the longest longitudinal micro-band of the first micro-strip resonantor (4) and the 4th micro-strip resonantor (12) is respectively and the first port feeder line (2) and the nearest longitudinal micro-band of the second port feeder line (14), in the first micro-strip resonantor (4), between the longest longitudinal micro-band and the first port feeder line (2), there is the first coupling gap (3), in the 4th micro-strip resonantor (12), between the longest longitudinal micro-band and the second port feeder line (14), there is the second coupling gap (13), between the shortest longitudinal micro-band of the first micro-strip resonantor (4) and the 4th micro-strip resonantor (12), there is the 3rd coupling gap (9), described the second micro-strip resonantor (6) and the 3rd micro-strip resonantor (10) are all comprised of three micro-bands, wherein two rules are parallel to the first port feeder line (2) and the second port feeder line (14) longitudinally, other one perpendicular to the first port feeder line (2) and the second port feeder line (14) longitudinally, the two ends of horizontal micro-band respectively with vertical connection of top of long longitudinal micro-band and shorter longitudinal micro-band, between shorter longitudinal micro-band of described the second micro-strip resonantor (6) and the 3rd micro-strip resonantor (10), there is the 4th coupling gap (7), their bottom connects by grounding through hole (8), be to introduce magnetic coupling between the second micro-strip resonantor (6) and the 3rd micro-strip resonantor (10), and their bottom is positioned at the top of shorter horizontal micro-band of the first micro-strip resonantor (4) and the 4th micro-strip resonantor (12), long longitudinal micro-band of described the second micro-strip resonantor (6) and the 3rd micro-strip resonantor (10) lays respectively between the longest longitudinal micro-band and medium longitudinal micro-band of the first micro-strip resonantor (4) and the 4th micro-strip resonantor (12), and between the medium longitudinal micro-band of long longitudinal micro-band of described the second micro-strip resonantor (6) and the first micro-strip resonantor (4), there is the 5th coupling gap (5), between the medium longitudinal micro-band of long longitudinal micro-band of described the 3rd micro-strip resonantor (10) and the 4th micro-strip resonantor (12), have the 6th coupling gap (11), long horizontal micro-band of described the first micro-strip resonantor (4) and the 4th micro-strip resonantor (12) is positioned at long longitudinal micro-below with bottom of the below of the first port feeder line (2), the second port feeder line (14) bottom and described the second micro-strip resonantor (6), the 3rd micro-strip resonantor (10) simultaneously.
2. a kind of plane CQ band pass filter according to claim 1, is characterized in that: the width of described input feeder line head port1 and output feeder line head port2 is W
1=2.2mm, the length of the first port feeder line and the second port feeder line is L
1=15.2mm, width are W
3=0.5mm.
3. a kind of plane CQ band pass filter according to claim 1, it is characterized in that: the length of the longest longitudinal micro-band of described the first micro-strip resonantor (4) and the 4th micro-strip resonantor (12) is L2=17.2mm, the length of medium longitudinal micro-band is L4=8mm, the length of the shortest longitudinal micro-band is L6=0.5mm, the length of long horizontal micro-band is L3=6mm, and the length of shorter horizontal micro-band is L5=2.9mm.
4. a kind of plane CQ band pass filter according to claim 1, it is characterized in that: the length of longitudinal micro-band of growing of described the second micro-strip resonantor (6) and the 3rd micro-strip resonantor (10) is L7=12.45mm, width is W2=1mm, the length of shorter longitudinal micro-band is L9=3mm, and the length of horizontal micro-band is L8=2.5mm.
5. according to the arbitrary described a kind of plane CQ band pass filter of claim 1 to 4, it is characterized in that: described input feeder line head port1 and output feeder line head port2 are the matched impedance of 50 ohm.
6. according to the arbitrary described a kind of plane CQ band pass filter of claim 1 to 4, it is characterized in that: the distance S of described the 4th coupling gap (7)
3for 0.5mm.
7. according to the arbitrary described a kind of plane CQ band pass filter of claim 1 to 4, it is characterized in that: the distance S of described the 3rd coupling gap (9)
4for 0.7mm.
8. according to the arbitrary described a kind of plane CQ band pass filter of claim 1 to 4, it is characterized in that: the distance S of described the 5th coupling gap (5) and the 6th coupling gap (11)
2be 0.5mm.
9. according to the arbitrary described a kind of plane CQ band pass filter of claim 1 to 4, it is characterized in that: the distance S of described the first coupling gap (3) and the second coupling gap (13)
1be 0.3mm.
10. according to the arbitrary described a kind of plane CQ band pass filter of claim 1 to 4, it is characterized in that: the relative dielectric constant of the micro-band plate of described two-sided shoe copper (1) substrate is 2.55, and medium height is 0.80mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410348611.5A CN104134837B (en) | 2014-07-21 | 2014-07-21 | Planar CQ band-pass filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410348611.5A CN104134837B (en) | 2014-07-21 | 2014-07-21 | Planar CQ band-pass filter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104134837A true CN104134837A (en) | 2014-11-05 |
| CN104134837B CN104134837B (en) | 2016-06-22 |
Family
ID=51807425
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410348611.5A Expired - Fee Related CN104134837B (en) | 2014-07-21 | 2014-07-21 | Planar CQ band-pass filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104134837B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104466321A (en) * | 2015-01-04 | 2015-03-25 | 电子科技大学 | Double-frequency band-pass filter based on electromagnetic mixed coupling |
| CN105070998A (en) * | 2015-08-27 | 2015-11-18 | 华南理工大学 | Miniaturized cross connector with filtering function |
| WO2016177086A1 (en) * | 2015-07-28 | 2016-11-10 | 中兴通讯股份有限公司 | Filter, filtering method and storage medium |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200986959Y (en) * | 2006-08-14 | 2007-12-05 | 海泰超导通讯科技（天津）有限公司 | Microstrip filter with trap filter |
| CN204067529U (en) * | 2014-07-21 | 2014-12-31 | 华南理工大学 | A Planar CQ Bandpass Filter |
-
2014
- 2014-07-21 CN CN201410348611.5A patent/CN104134837B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200986959Y (en) * | 2006-08-14 | 2007-12-05 | 海泰超导通讯科技（天津）有限公司 | Microstrip filter with trap filter |
| CN204067529U (en) * | 2014-07-21 | 2014-12-31 | 华南理工大学 | A Planar CQ Bandpass Filter |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104466321A (en) * | 2015-01-04 | 2015-03-25 | 电子科技大学 | Double-frequency band-pass filter based on electromagnetic mixed coupling |
| CN104466321B (en) * | 2015-01-04 | 2017-02-22 | 电子科技大学 | Double-frequency band-pass filter based on electromagnetic mixed coupling |
| WO2016177086A1 (en) * | 2015-07-28 | 2016-11-10 | 中兴通讯股份有限公司 | Filter, filtering method and storage medium |
| CN106410334A (en) * | 2015-07-28 | 2017-02-15 | 中兴通讯股份有限公司 | Filter and filtering method |
| CN105070998A (en) * | 2015-08-27 | 2015-11-18 | 华南理工大学 | Miniaturized cross connector with filtering function |
| CN105070998B (en) * | 2015-08-27 | 2018-05-15 | 华南理工大学 | A kind of miniaturization cross-connect with filter function |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104134837B (en) | 2016-06-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Lee et al. | Design of a new tri-band microstrip BPF using combined quarter-wavelength SIRs | |
| KR101010401B1 (en) | Dielectric Mono-Block Triple-Mode Microwave Delay Filters | |
| US11158924B2 (en) | LTCC wide stopband filtering balun based on discriminating coupling | |
| Szydlowski et al. | A trisection filter design with negative slope of frequency-dependent crosscoupling implemented in substrate integrated waveguide (SIW) | |
| CN103904391B (en) | Multilayer hybrid guided mode hexagon substrate integral wave guide filter | |
| CN103915667B (en) | LTCC band-pass filter using feed structure to restrain third harmonics | |
| CN110797614B (en) | Miniaturized substrate integrated waveguide filter with high-order mode suppression | |
| CN103579723B (en) | High-selectivity bandpass filter based on I-shaped dual-mode resonator | |
| CN106532206A (en) | Direct coupled rectangular waveguide filter with integrated E-surface probe transition structure | |
| CN108493534A (en) | A kind of four mould chip integrated waveguide broad-band filters | |
| CN204067529U (en) | A Planar CQ Bandpass Filter | |
| CN102610880A (en) | Plane miniaturization communication band-pass filter with broadband external inhibition characteristic | |
| CN115395191B (en) | A wide stopband substrate integrated waveguide filter based on hybrid coupling | |
| CN105958165B (en) | A kind of three frequency range of miniaturization high isolation, six tunnel micro-strip combiner | |
| CN104134837A (en) | A Planar CQ Bandpass Filter | |
| US10673111B2 (en) | Filtering unit and filter | |
| CN111293390B (en) | UIR loaded three-order double-passband substrate integrated waveguide filter | |
| JP2000357903A (en) | Planar filter | |
| CN104009271B (en) | Planar band-pass filter based on four cascaded resonators | |
| CN106252804A (en) | Multilamellar millimeter wave filter | |
| CN114843729B (en) | An unbalanced to balanced millimeter wave substrate integrated waveguide filter power splitter | |
| CN104253291A (en) | Novel microwave and millimeter wave broadband filter of strip line structure | |
| CN203871449U (en) | Planar band pass filter based on concatenation of four resonators | |
| Madhan et al. | Design and Fabrication of Transmission line based Wideband band pass filter | |
| CN114389002A (en) | SIW filter power divider loaded with complementary stepped folded split ring and design method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160622 Termination date: 20210721 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |