CN110336103A - A kind of frequency band tunable filter - Google Patents
A kind of frequency band tunable filter Download PDFInfo
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- CN110336103A CN110336103A CN201910694251.7A CN201910694251A CN110336103A CN 110336103 A CN110336103 A CN 110336103A CN 201910694251 A CN201910694251 A CN 201910694251A CN 110336103 A CN110336103 A CN 110336103A
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- feeder line
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- frequency band
- tunable filter
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/20—Frequency-selective devices, e.g. filters
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Abstract
The present embodiments relate to wave filter technology fields, disclose a kind of frequency band tunable filter, comprising: medium substrate；It is separately positioned on the upper surface metal patch and lower surface metal patch of medium substrate obverse and reverse；Marginal position positioned at medium substrate and the circumferential metal via hole through upper surface metal patch and lower surface metal patch；Central location positioned at medium substrate and multiple non-plated-through holes through upper surface metal patch and lower surface metal patch, multiple non-plated-through holes are for accommodating copper post to adjust the resonance frequency of filter.The frequency band tunable filter provided in mode of the present invention, design is simple, and easy to operate, practical during practical filter frequency tuning.
Description
Technical field
The present embodiments relate to wave filter technology field, in particular to a kind of frequency band tunable filter.
Background technique
The design of tunable filter is concentrated mainly on micro-strip and cavity body structure all the time, for substrate integrated wave guide structure
The design of tunable filter is seldom.Substrate integration wave-guide is by introducing week between the metal covering above and below the medium substrate of double-sided copper-clad
Phase property plated-through hole array is come a kind of waveguiding structure for realizing.The propagation characteristic of substrate integration wave-guide and corresponding media filler
Metal waveguide is similar.Substrate integration wave-guide has the high quality factor similar with metal waveguide, planarization, easy of integration, power
The advantages that capacity is big, simultaneously because can realize also have using flexible circuit board PCB or low-temperature co-fired ceramics LTCC technique
Small in size, the advantages of light weight and cost is low, easy to process, the conventional metals waveguide such as be easily achieved Planar integration does not have.
However, it is found by the inventors that at least there are the following problems in the prior art: the existing adjustable filtering of substrate integration wave-guide
Device is to be realized by tunable capacitor or method of switching, but the design of these methods is complicated, the process of practical filter frequency tuning
In it is not easy to operate.
Summary of the invention
Embodiment of the present invention is designed to provide a kind of frequency band tunable filter, and design is simple, and in practical filtering
It is easy to operate, practical during device frequency tuning.
In order to solve the above technical problems, embodiments of the present invention provide a kind of frequency band tunable filter, comprising: medium
Substrate；It is separately positioned on the upper surface metal patch and lower surface metal patch of medium substrate obverse and reverse；Positioned at medium base
The marginal position of plate and the circumferential metal via hole for running through upper surface metal patch and lower surface metal patch；Positioned at medium base
The central location of plate and the multiple non-plated-through holes for running through upper surface metal patch and lower surface metal patch, it is multiple not golden
Categoryization through-hole is for accommodating copper post to adjust the resonance frequency of filter.
Embodiment of the present invention provides a kind of frequency band tunable filter in terms of existing technologies, comprising: exists respectively
Medium substrate obverse and reverse is arranged upper surface metal patch and lower surface metal patch, and the marginal position of medium substrate,
Upper surface metal patch and lower surface metal patch are provided with circumferential metal through-hole, so that substrate integration wave-guide is formed,
By the central location in substrate integration wave-guide, multiple not gold through upper surface metal patch and lower surface metal patch are set
Categoryization through-hole, design structure is simple, and by being inserted into copper post at the different location of multiple non-plated-through hole to change filter
The resonance frequency of wave device, the process of practical filter frequency tuning are easy to operate, practical.
In addition, the number of non-plated-through hole is 9,9 non-plated-through holes are arranged in Jie in a manner of 3 × 3 arrays
The central location of matter substrate.
In addition, the spacing range of the central axis of two neighboring non-plated-through hole be 2 millimeters -3 millimeters, do not metallize it is logical
The diameter range in hole is 1 millimeter -1.5 millimeters.
In addition, medium substrate is square.
In addition, the side size range of medium substrate is 28 millimeters -32 millimeters.
In addition, the spacing range of the central axis of two neighboring circumferential metal via hole is 1.3 millimeters -1.7 millimeters, periphery
The diameter range of metallization VIA is 0.7 millimeter -0.9 millimeter.
In addition, further includes: it is respectively arranged at diagonal the first metallization VIA and the second metallization VIA of medium substrate,
First metallization VIA and the second metallization VIA are between circumferential metal via hole and non-plated-through hole；First metallization
Via hole and the second metallization VIA run through upper surface metal patch and lower surface metal patch.
In addition, the central axis of the first metallization VIA and the central axis of the second metallization VIA and circumferential metal mistake
The vertical distance range of the central axis in hole is 4.5 millimeters -4.7 millimeters.
In addition, being set to the input terminal feeder line and output end feeder line of upper surface metal patch, the extension side of input terminal feeder line
To vertical with the extending direction of output end feeder line.
In addition, the feeder line width range of input terminal feeder line and output end feeder line is 1.5 millimeters -1.7 millimeters, input terminal feedback
The feed line length range of line and output end feeder line is the feeder line of 7.4 millimeters -7.6 millimeters, input terminal feeder line and output end feeder line
Slit width range is 0.7 millimeter -0.9 millimeter, the feeder line of input terminal feeder line and output end feeder line stitch long range be 5.9 millimeters -
6.1 millimeter.
Detailed description of the invention
One or more embodiments are illustrated by the picture in corresponding attached drawing, these exemplary theorys
The bright restriction not constituted to embodiment, the element in attached drawing with same reference numbers label are expressed as similar element, remove
Non- to have special statement, composition does not limit the figure in attached drawing.
Fig. 1 is the structural schematic diagram of the frequency band tunable filter of first embodiment according to the present invention；
Fig. 2 be first embodiment according to the present invention frequency band tunable filter in be not inserted into copper post field distribution signal
Figure；
Fig. 3 be first embodiment according to the present invention frequency band tunable filter in be not inserted into the S parameter schematic diagram of copper post；
Fig. 4 is that the field distribution of a piece copper post of insertion in the frequency band tunable filter of first embodiment according to the present invention is shown
It is intended to；
Fig. 5 is the S parameter signal of piece copper post of insertion in the frequency band tunable filter of first embodiment according to the present invention
Figure；
Fig. 6 is that the field distribution of four copper posts of insertion in the frequency band tunable filter of first embodiment according to the present invention is shown
It is intended to；
Fig. 7 is the S parameter signal of four copper posts of insertion in the frequency band tunable filter of first embodiment according to the present invention
Figure；
Fig. 8 is that the field distribution of eight copper posts of insertion in the frequency band tunable filter of first embodiment according to the present invention is shown
It is intended to；
Fig. 9 is the S parameter signal of eight copper posts of insertion in the frequency band tunable filter of first embodiment according to the present invention
Figure.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with attached drawing to the present invention
Each embodiment be explained in detail.However, it will be understood by those skilled in the art that in each embodiment party of the present invention
In formula, in order to make the reader understand this application better, many technical details are proposed.But even if without these technical details
And various changes and modifications based on the following respective embodiments, the application technical solution claimed also may be implemented.
The first embodiment of the present invention is related to a kind of frequency band tunable filter, the core of present embodiment is, comprising:
Medium substrate；It is separately positioned on the upper surface metal patch and lower surface metal patch of medium substrate obverse and reverse；Positioned at Jie
The marginal position of matter substrate and the circumferential metal via hole for running through upper surface metal patch and lower surface metal patch；Positioned at Jie
The central location of matter substrate and the multiple non-plated-through holes for running through upper surface metal patch and lower surface metal patch, it is multiple
Non- plated-through hole is for accommodating copper post to adjust the resonance frequency of filter.Respectively in medium substrate in embodiment of the present invention
Upper surface metal patch and lower surface metal patch is arranged in obverse and reverse, and in the marginal position of medium substrate, run through upper table
Face metal patch and lower surface metal patch are provided with circumferential metal through-hole, so that substrate integration wave-guide is formed, by base
Multiple non-plated-through holes through upper surface metal patch and lower surface metal patch are arranged in the central location of piece integrated waveguide,
Design structure is simple, and by being inserted into copper post at the different location of multiple non-plated-through hole to change the resonance of filter
Frequency, the process of practical filter frequency tuning are easy to operate, practical.
The realization details of the frequency band tunable filter of present embodiment is specifically described below, the following contents is only
The realization details for understanding and providing is provided, the necessary of this programme is not implemented.
The structural schematic diagram of frequency band tunable filter in present embodiment is as shown in Figure 1:
It should be noted that being to be based on Rogers 5880, with a thickness of 0.508 millimeter in present embodiment, opposite dielectric is normal
Number is 2.2, and the medium substrate that loss tangent is 0.0009 is designed and processes.
The substrate integration wave-guide of present embodiment midband tunable filter includes: to be arranged in medium substrate obverse and reverse
Upper surface metal patch and lower surface metal patch, and the marginal position of medium substrate, through upper surface metal patch and under
Surface metal patch is provided with circumferential metal through-hole.Wherein, medium substrate is square, and the side length a range of medium substrate is
28 millimeters -32 millimeters.Preferably, the side length a of medium substrate is specially 30 millimeters.The center of two neighboring circumferential metal via hole
The spacing p range of axis is 1.3 millimeters -1.7 millimeters, the diameter d range of circumferential metal via hole is 0.7 millimeter -0.9 millimeter,
Wherein, the spacing p of the central axis of two neighboring circumferential metal via hole and the diameter d of circumferential metal via hole are related, and p/d <
2.Preferably, the spacing p of the central axis of two neighboring circumferential metal via hole be 1.5 millimeters, circumferential metal via hole it is straight
Diameter d is 0.8 millimeter.The diameter and spacing of the shape, size of medium substrate in present embodiment, circumferential metal via hole
It is that the progress of the centre frequency according to needed for filter design of Simulation is obtained, the shape of medium substrate not only may be used in practical application
To be square, or the diameter and spacing of rectangle or other shapes, size and circumferential metal via hole
Design of Simulation is carried out according to specific centre frequency to obtain.
In addition, substrate integration wave-guide further include: it is set to the input terminal feeder line and output end feeder line of upper surface metal patch,
The extending direction of input terminal feeder line is vertical with the extending direction of output end feeder line.I.e. that is, the input of substrate integration wave-guide is defeated
Out by the way of right angle coupling, to be conducive to filter in TE102And TE201Zero is generated in the second passband under transmission mode
Point.Wherein, the feeder line width W1 range of input terminal feeder line and output end feeder line is 1.5 millimeters -1.7 millimeters, input terminal feeder line
Feed line length L1 range with output end feeder line is the feeder line of 7.4 millimeters -7.6 millimeters, input terminal feeder line and output end feeder line
It is equal that slit width Wslot range is 0.7 millimeter -0.9 millimeter, the feeder line of input terminal feeder line and output end feeder line stitches long Lslot range
It is 5.9 millimeters -6.1 millimeters.Preferably, feeder line width W1 is 1.6 millimeters, and feed line length L1 is 7.5 millimeters, feeder line slit width
Wslot is 0.8 millimeter, and it is 6 millimeters that feeder line, which stitches long Lslot,.
In this programme substrate integration wave-guide center design 9 non-plated-through holes, 9 non-plated-through holes with
The mode of 3 × 3 arrays is arranged in the central location of medium substrate, by being inserted into copper post at the different location of non-plated-through hole
Perturbation electric field is to realize the filter of regulable center frequency.Due to the diameter of non-plated-through hole and the diameter difference of insertion copper post
Less, therefore, the diameter d1 of non-plated-through hole should not be too small, and diameter d1 may range from 1 millimeter -1.5 millimeters, it is preferable that
The diameter d1 of non-plated-through hole is 1.2 millimeters.In addition, the spacing ds range of the central axis of two neighboring non-plated-through hole
It is 2 millimeters -3 millimeters, it is preferable that the spacing ds of the central axis of two neighboring non-plated-through hole is 2.2 millimeters.
Further, it is disturbed to increase, in the diagonal setting of substrate integration wave-guide, there are two gold in present embodiment
Categoryization perturbation hole (the first metallization VIA and the second metallization VIA), the first metallization VIA and the second metallization VIA are located at
Between circumferential metal via hole and non-plated-through hole；First metallization VIA and the second metallization VIA run through upper surface gold
Belong to patch and lower surface metal patch.Wherein, the central axis of the central axis of the first metallization VIA and the second metallization VIA
The vertical range t range of the central axis of line and circumferential metal via hole is 4.5 millimeters -4.7 millimeters.Preferably, vertically away from
It is 4.7 millimeters from t.
Present embodiment is carried out below with reference to the simulation experiment result of present embodiment midband tunable filter specific
Illustrate:
In present embodiment shown in experiment parameter table 1 specific as follows:
With four kinds of states of frequency band tunable filter in present embodiment, in TE101、TE102And TE201Under Three models
It is illustrated for field distribution:
State 1: copper post is not inserted into non-plated-through hole.At this point, electric field of the filter under three kinds of different modes point
Cloth such as Fig. 2 (a), (b) and (c) are shown；S parameters simulation schematic diagram is as shown in Figure 3, wherein and dotted line Measured is prediction curve,
Solid line Simulated is simulation curve；Filter centre frequency is 5.25/8.35GHz, bandwidth 4.4/4.6%, insertion loss
For 1.8/2.1dB, return loss 21.2/18.1dB.
State 2: being sky in a piece copper post of center position insertion for non-plated-through hole, remaining non-plated-through hole.
At this point, shown in field distribution of the filter under three kinds of different modes such as Fig. 4 (a), (b) and (c), compared to Fig. 2 as can be seen that
After the center position of non-plated-through hole is inserted into a copper post, TE101Electric field under mode receives serious disturbance, TE102
And TE201Electric field under mode do not have it is disturbed, so TE101Under mode the resonance frequency of filter can to high-frequency mobile, and
TE102And TE201The resonance frequency of filter is constant under mode.S parameters simulation schematic diagram is as shown in Figure 5, wherein dotted line
Measured is prediction curve, and solid line Simulated is simulation curve；Filter centre frequency is 6.65/8.42GHz, bandwidth
For 5/4.6%, insertion loss 1.92/2.4dB, return loss 22.5/17.2dB.
State 3: being sky in four copper posts of symmetric position insertion of non-plated-through hole, remaining non-plated-through hole.This
When, shown in field distribution of the filter under three kinds of different modes such as Fig. 6 (a), (b) and (c), compared to Fig. 2 as can be seen that
After the symmetric position of non-plated-through hole is inserted into four copper posts, the level of disruption that the electric field under Three models is subject to is deepened, humorous
Vibration frequency is to high-frequency mobile.S parameters simulation schematic diagram is as shown in Figure 7, wherein dotted line Measured is prediction curve, solid line
Simulated is simulation curve；Filter centre frequency is 7.9/9.02GHz, bandwidth 4.1/5.3%, insertion loss are
2.0/2.23dB, return loss 23.1/13.4dB.
State 4: being sky in the center position of eight copper posts of non-plated-through hole insertion, non-plated-through hole.At this point, filter
Field distribution of the wave device under three kinds of different modes such as Fig. 8 (a), (b) and (c) are shown, compared to Fig. 2 as can be seen that TE101、
TE102And TE201The electric field perturbations of Three models are more obvious, and the resonance frequency of Three models is obviously to high-frequency mobile.S parameter is imitative
True schematic diagram is as shown in Figure 9, wherein dotted line Measured is prediction curve, and solid line Simulated is simulation curve；Filter
Centre frequency is 8.61/9.45GHz, bandwidth 3.7/5.7%, insertion loss 1.95/2.45dB, return loss 24.1/
14.6dB。
Compared with prior art, embodiment of the present invention provides a kind of frequency band tunable filter, respectively in medium substrate
Upper surface metal patch and lower surface metal patch is arranged in obverse and reverse, and in the marginal position of medium substrate, run through upper table
Face metal patch and lower surface metal patch are provided with circumferential metal through-hole, so that substrate integration wave-guide is formed, by base
Multiple non-plated-through holes through upper surface metal patch and lower surface metal patch are arranged in the central location of piece integrated waveguide,
Design structure is simple, and by being inserted into copper post at the different location of multiple non-plated-through hole to change the resonance of filter
Frequency, the process of practical filter frequency tuning are easy to operate, practical.
It will be understood by those skilled in the art that the respective embodiments described above are to realize specific embodiments of the present invention,
And in practical applications, can to it, various changes can be made in the form and details, without departing from the spirit and scope of the present invention.
Claims (10)
1. a kind of frequency band tunable filter characterized by comprising
Medium substrate；
It is separately positioned on the upper surface metal patch and lower surface metal patch of the medium substrate obverse and reverse；
Positioned at the medium substrate marginal position and through the upper surface metal patch and the lower surface metal patch
Circumferential metal via hole；
Positioned at the medium substrate central location and through the upper surface metal patch and the lower surface metal patch
Multiple non-plated-through holes, the multiple non-plated-through hole is for accommodating copper post to adjust the resonance frequency of filter.
2. frequency band tunable filter according to claim 1, which is characterized in that the number of the non-plated-through hole is 9
A, non-plated-through hole described in 9 is arranged in the central location of the medium substrate in a manner of 3 × 3 arrays.
3. frequency band tunable filter according to claim 2, which is characterized in that the two neighboring non-plated-through hole
The spacing range of central axis is 2 millimeters -3 millimeters, the diameter range of the non-plated-through hole is 1 millimeter -1.5 millimeters.
4. frequency band tunable filter according to claim 1, which is characterized in that the medium substrate is square.
5. frequency band tunable filter according to claim 4, which is characterized in that the side size range of the medium substrate is 28
- 32 millimeters of millimeter.
6. frequency band tunable filter according to claim 5, which is characterized in that the two neighboring circumferential metal via hole
Central axis spacing range be 1.3 millimeters -1.7 millimeters, the diameter range of the circumferential metal via hole be 0.7 millimeter -
0.9 millimeter.
7. frequency band tunable filter according to claim 4, which is characterized in that further include: it is respectively arranged at the medium
Diagonal the first metallization VIA and the second metallization VIA of substrate, first metallization VIA and second metallization
Via hole is between the circumferential metal via hole and the non-plated-through hole；
First metallization VIA and second metallization VIA run through the upper surface metal patch and the following table
Face metal patch.
8. frequency band tunable filter according to claim 7, which is characterized in that the central axis of first metallization VIA
The vertical distance range of the central axis of line and the central axis of second metallization VIA and the circumferential metal via hole
It is 4.5 millimeters -4.7 millimeters.
9. frequency band tunable filter according to claim 1, which is characterized in that further include: it is set to the upper surface gold
Belong to the input terminal feeder line and output end feeder line of patch, the extension of the extending direction of the input terminal feeder line and the output end feeder line
Direction is vertical.
10. frequency band tunable filter according to claim 9, which is characterized in that the input terminal feeder line and the output
The feeder line width range of end feeder line is the feeder line of 1.5 millimeters -1.7 millimeters, the input terminal feeder line and the output end feeder line
Length range is 7.4 millimeters -7.6 millimeters, the feeder line slit width range of the input terminal feeder line and the output end feeder line is
0.7 millimeter -0.9 millimeter, to stitch long range be 5.9 millimeter of -6.1 milli for the feeder line of the input terminal feeder line and the output end feeder line
Rice.
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| CN201910694251.7A CN110336103B (en) | 2019-07-30 | 2019-07-30 | Frequency band adjustable filter |
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| CN201910694251.7A CN110336103B (en) | 2019-07-30 | 2019-07-30 | Frequency band adjustable filter |
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| CN110336103B CN110336103B (en) | 2021-09-17 |
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| CN111525221A (en) * | 2020-07-03 | 2020-08-11 | 成都雷电微力科技股份有限公司 | Substrate integrated waveguide power divider working in W waveband and having high isolation |
| CN115586375A (en) * | 2022-09-05 | 2023-01-10 | 安徽师范大学 | Mutual coupling annular seam-based 5G plane electromagnetic sensor and measuring method |
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