CN208444927U - A kind of miniaturization Double-band-pass microstrip filter of symmetrical minor matters load - Google Patents
A kind of miniaturization Double-band-pass microstrip filter of symmetrical minor matters load Download PDFInfo
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- CN208444927U CN208444927U CN201820832076.4U CN201820832076U CN208444927U CN 208444927 U CN208444927 U CN 208444927U CN 201820832076 U CN201820832076 U CN 201820832076U CN 208444927 U CN208444927 U CN 208444927U
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- minor matters
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Abstract
The utility model discloses a kind of miniaturization Double-band-pass microstrip filters of symmetrical minor matters load, including medium substrate, the one side of the medium substrate include resonator, feeder line, signal input port and signal output port, are on one side earth plate；The resonator includes the first resonator and the second resonator, and first resonator is the step electric impedance resonator loaded by short-circuit minor matters, and second resonator is the uniform impedance resonator loaded by open circuit minor matters；The feeder line includes the first feeder line and the second feeder line, and the signal input port is connect with the first feeder line, and the signal output port is connect with the second feeder line.The utility model beneficial effect is, miniaturization, the frequency band for realizing comb filter are adjustable, bandwidth is controllable.
Description
Technical field
Technical field the utility model relates to multi-pass with plane microstrip filter, i.e., the utility model proposes one kind it is right
Claim the miniaturization Double-band-pass microstrip filter of minor matters load.
Background technique
Since 21 century, wireless communication technique, i.e. 2G-5G communicate (GSM, WCDMA, UWB, DCS, WLAN, WIMAX, LTE
Deng) fast development, largely have stimulated the rapid development of filter.In order to meet the different standard of the various communication technologys
Scale, high-performance, miniaturization, multi-pass band, low cost and microwave passive component easy of integration are come into being.And microwave filter is made
For one of the indispensable element of wireless communication system, good Out-of-band rejection, the characteristic for filtering frequency-selecting and miniaturization shape ruler
Concern and research of the advantages that very little by numerous experts and scholars.
Filter is as a kind of very important frequency-selecting device.It, can direct mistake by setting the technical indicator of filter
The useless frequency range other than the received passband of system front end is filtered, only index passband is allowed to pass through, to improve the anti-dry of system
Immunity and stability.Secondly, it not only can efficiently filter off image interference, decaying noise, frequency division multiplexing；And it is also a variety of
The center of design problem in radio technology, while the resonator structure for designing filter can also be used as wide-band impedance
Matching or coupled structure.
Tradition is related to the primary superposition that multi-pass mostly uses multi-resmator with microstrip filter, and design so not only causes to filter
The size of device increases, and volume increases, while cost, debugging difficulty also increase with it.
Summary of the invention
The main purpose of the utility model is to solve defect of the existing technology, proposes a kind of high-performance, small in size, is inserted
Enter to be lost small, frequency is adjustable, the adjustable microstrip filter of bandwidth.
In order to achieve the above-mentioned object of the invention, the utility model adopts the following technical solution:
A kind of miniaturization Double-band-pass microstrip filter of symmetrical minor matters load, including medium substrate, the medium substrate
Include on one side resonator, feeder line, signal input port and signal output port, is on one side earth plate；The resonator includes the
One resonator and the second resonator, first resonator are the step electric impedance resonators loaded by short-circuit minor matters, described second
Resonator is the uniform impedance resonator loaded by open circuit minor matters；The feeder line includes the first feeder line and the second feeder line, the letter
Number input port is connect with the first feeder line, and the signal output port is connect with the second feeder line.
Preferably, first resonator includes first transmission line, second transmission line, third transmission line, the 4th
Transmission line, the 5th transmission line load short-circuit minor matters, the 6th transmission line, the 7th transmission line, the 8th transmission line and copper facing via hole.
Preferably, the length for loading short-circuit minor matters is adjustable, to realize the low frequency side frequency of the first passband
The number of point transmission zero.
Preferably, second resonator is opened including the 9th transmission line, the first load open circuit minor matters, the second load
Road minor matters, third load open circuit minor matters, the 4th load open circuit minor matters, the 5th load open circuit minor matters, the 6th load open circuit minor matters.
Preferably, the quantity of the load open circuit minor matters is adjustable, to realize high frequency side frequency point transmission zero
Number.
Preferably, the humorous of the second passband can be adjusted by adjusting the 6th load open circuit minor matters of the second resonator
Vibration frequency.
Preferably, first resonator and the second resonator transmit electromagnetic wave signal by feeder line.
Preferably, the structure is produced on medium substrate in the manner of a printed circuit board.
It preferably, can by the coupling spacing adjusted between the first resonator and the first feeder line and the second feeder line
Adjust the frequency bandwidth of the first passband.
It preferably, can by the coupling spacing adjusted between the second resonator and the first feeder line and the second feeder line
Adjust the frequency bandwidth of the second passband.
The beneficial effects of the utility model are that when each mode of resonance works, respective resonance frequency is independent of each other, mutually
It does not interfere, frequency can be controlled respectively by changing the length of load open circuit minor matters, can pass through and adjust resonator and feeder line
Between coupling spacing control frequency bandwidth of operation, while stating performance in realization and realize miniaturization, realize frequency
Band is controllable, and bandwidth is controllable.
Detailed description of the invention
Fig. 1 be the utility model proposes miniaturization Double-band-pass microstrip filter structural schematic diagram.
Fig. 2 be the utility model proposes miniaturization Double-band-pass microstrip filter size marking schematic diagram.
Fig. 3 be the utility model proposes miniaturization Double-band-pass microstrip filter size marking schematic diagram.
Wherein, the 1, first feeder line；2, the second feeder line；3, first transmission line；4, second transmission line；5, third transmission line；6,
4th transmission line；7, the 5th transmission line；8, short circuit load minor matters；9, ground via；10, the 6th transmission line；11, the 7th transmission
Line；12, the 8th transmission line；13, the 9th transmission line；14, the first load open circuit minor matters；15, the second load open circuit minor matters；16,
Three load open circuit minor matters；17, the 4th load open circuit minor matters；18, the 5th load open circuit minor matters；19, the 6th load open circuit minor matters.
Specific embodiment
The miniaturization Double-band-pass microstrip filter of the symmetrical minor matters load of the utility model design, not only realizes multi-pass band
The miniaturization of filter, and frequency is controllable, and bandwidth is controllable and does not interfere with each other.
Size and specific emulation data do more detailed elaboration explanation to the utility model with reference to the accompanying drawing:
A kind of miniaturization Double-band-pass microstrip filter of symmetrical minor matters load, including medium substrate, the medium substrate
Include on one side resonator, feeder line, signal input port I/P and signal output port O/P, is on one side earth plate；The resonator
It is the stepped impedance resonance loaded by short-circuit minor matters including the first resonator R1 and the second resonator R2, the first resonator R1
Device, second resonator are the uniform impedance resonators loaded by open circuit minor matters；The feeder line includes the first feeder line 1 and second
Feeder line 2, the signal input port I/P are connect with the first feeder line 1, and the signal output port O/P is connect with the second feeder line 2.
First passband of filter is controlled by the first resonator R1, and the second passband is controlled by the second resonator R2.
The first resonator R1 include first transmission line 3, second transmission line 4, third transmission line 5, the 4th transmission line 6,
5th transmission line 7 loads short-circuit minor matters 8, the 6th transmission line 10, the 7th transmission line 11, the 8th transmission line 12 and copper facing via hole 9.
The first passband can be adjusted by adjusting the coupling spacing between the first resonator and the first feeder line and the second feeder line
Frequency bandwidth.
Second resonator include the 9th transmission line 13, first load open circuit minor matters 14, second load open circuit minor matters 15,
The third load open circuit load open circuit load open circuit load open circuit minor matters 19 of minor matters the 18, the 6th of minor matters the 17, the 5th of minor matters the 16, the 4th.
The 6th load open circuit minor matters 19 by adjusting the second resonator can adjust the resonance frequency of the second passband.By adjusting second
Coupling spacing between resonator and the first feeder line 1 and the second feeder line 2 can adjust the frequency bandwidth of the second passband.The load
The quantity for minor matters of opening a way is adjustable, to realize the number of high frequency side frequency point transmission zero.The length for loading short-circuit minor matters
It is adjustable, to realize the number of the low frequency side frequency point transmission zero of the first passband.First resonator and the second resonator
Electromagnetic wave signal is transmitted by feeder line.The structure is produced on medium substrate in the manner of a printed circuit board.
Design medium plate parameter used in the Double-band-pass microstrip filter are as follows: relative dielectric constant 2.55, thickness
For 0.8mm, loss tangent angle is 0.002F4B dielectric-slab, copper coating with a thickness of 35um, medium substrate lower surface is copper facing
The earth plate of thickness 35um.The first passband and the second passband of the Double-band-pass microstrip filter of the utility model are by the first resonator
R1, the second resonator R2 are independently controlled, and are not interfere with each other.The 6th load open circuit minor matters 19 of second resonator R2 can be adjusted
Save the resonance frequency of the second passband.Coupling spacing between first resonator R1 and the first feeder line 1 and the second feeder line 2 can be adjusted
The frequency bandwidth of first passband.Coupling spacing between second resonator R2 and the first feeder line 1 and the second feeder line 2 can adjust
The frequency bandwidth of two passbands.The utility model Double-band-pass microstrip filter can by adjust load the numbers of open circuit minor matters can be with
Adjust the number of the high frequency side frequency point transmission zero of the second passband.The utility model Double-band-pass microstrip filter can pass through adjusting
Load the number of the low frequency side frequency point transmission zero of adjustable first passband of length of short-circuit minor matters.
A high-performance applied to WIFI 2.4GHZ and 5.2GNZ frequency range of the utility model major design, miniaturization,
Frequency band and the controllable micro-strip double-passband filter of bandwidth.
The utility model emulates Double-band-pass microstrip filter using three-dimensional artificial software CST, ruler shown in Fig. 2
In very little mark schematic diagram, the dimensional parameters of each transmission line and load minor matters are unit: mm:
Fig. 3 is the scattering parameter simulation result diagram of the Double-band-pass microstrip filter of the utility model.Abscissa indicates this reality
With the signal frequency of novel module double-frequency micro-strip filter, ordinate indicates amplitude --- the amplitude and insertion damage of return loss S11
Consume the amplitude of S21.From figure 3, it can be seen that the resonance frequency of the filter distinguishes 2.4GHz and 5.2GHz.At 2.4GHz, imitate
The absolute value for really leading to in-band insertion loss is 0.4dB, and return loss absolute value is greater than 20dB, and 3dB bandwidth of operation is 2.35GHz
~2.49GHz (5.8%)；At 5.2GHz, the absolute value of pass band insertion loss is 0.8dB, and the absolute value of return loss is greater than
15dB, 3dB bandwidth of operation are 5.15GHz~5.30GHz (3%).In addition, the filter produces 5 transmission zeros, divide respectively
Cloth improves the frequency selection in the filter passband at 1.78GHz, 2.65GHz, 4.69GHz, 5.58GHz and 5.86GHz
Property, substantially increase the performance of filter.
Due to the application of the above technical scheme, the utility model has the advantage that compared with prior art
In conclusion the double-passband filter of the utility model design the advantage is that so that each mode of resonance works
When, respective resonance frequency is independent of each other, and does not interfere with each other, and can control respectively frequency by changing the length of load open circuit minor matters
Rate can control frequency bandwidth of operation by adjusting the coupling spacing between resonator and feeder line, state performance in realization
Simultaneously and miniaturization is realized, realizes that frequency band is controllable, and bandwidth is controllable.
The above is only specific embodiment of the present utility model, do not constitute any limit to the protection scope of the utility model
System.Any technical scheme formed by adopting equivalent transformation or equivalent replacement, all fall within the utility model rights protection scope it
It is interior.
Claims (9)
1. a kind of miniaturization Double-band-pass microstrip filter of symmetrical minor matters load, which is characterized in that including medium substrate, given an account of
The one side of matter substrate includes resonator, feeder line, signal input port and signal output port, is on one side earth plate；The resonance
Device includes the first resonator and the second resonator, and first resonator is the step electric impedance resonator loaded by short-circuit minor matters,
Second resonator is the uniform impedance resonator loaded by open circuit minor matters；The feeder line includes the first feeder line and the second feedback
Line, the signal input port are connect with the first feeder line, and the signal output port is connect with the second feeder line.
2. a kind of miniaturization Double-band-pass microstrip filter of symmetrical minor matters load according to claim 1, which is characterized in that
First resonator includes first transmission line, second transmission line, third transmission line, the 4th transmission line, the 5th transmission line, load
Short-circuit minor matters, the 6th transmission line, the 7th transmission line, the 8th transmission line and copper facing via hole.
3. a kind of miniaturization Double-band-pass microstrip filter of symmetrical minor matters load according to claim 2, which is characterized in that
The length for loading short-circuit minor matters is adjustable, to realize the number of the low frequency side frequency point transmission zero of the first passband.
4. a kind of miniaturization Double-band-pass microstrip filter of symmetrical minor matters load according to claim 1, which is characterized in that
Second resonator includes the 9th transmission line, the first load open circuit minor matters, the second load open circuit minor matters, third load open circuit branch
Section, the 4th load open circuit minor matters, the 5th load open circuit minor matters, the 6th load open circuit minor matters.
5. a kind of miniaturization Double-band-pass microstrip filter of symmetrical minor matters load according to claim 4, which is characterized in that
The quantity of the load open circuit minor matters is adjustable, to realize the number of high frequency side frequency point transmission zero.
6. a kind of miniaturization Double-band-pass microstrip filter of symmetrical minor matters load according to claim 4, which is characterized in that
The 6th load open circuit minor matters by adjusting the second resonator can adjust the resonance frequency of the second passband.
7. a kind of miniaturization Double-band-pass microstrip filter of symmetrical minor matters load according to claim 1, which is characterized in that
First resonator and the second resonator transmit electromagnetic wave signal by feeder line.
8. a kind of miniaturization Double-band-pass microstrip filter of symmetrical minor matters load according to claim 1, which is characterized in that
The frequency band of the first passband can be adjusted by adjusting the coupling spacing between the first resonator and the first feeder line and the second feeder line
It is wide.
9. a kind of miniaturization Double-band-pass microstrip filter of symmetrical minor matters load according to claim 1, which is characterized in that
The frequency band of the second passband can be adjusted by adjusting the coupling spacing between the second resonator and the first feeder line and the second feeder line
It is wide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820832076.4U CN208444927U (en) | 2018-05-31 | 2018-05-31 | A kind of miniaturization Double-band-pass microstrip filter of symmetrical minor matters load |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820832076.4U CN208444927U (en) | 2018-05-31 | 2018-05-31 | A kind of miniaturization Double-band-pass microstrip filter of symmetrical minor matters load |
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| CN208444927U true CN208444927U (en) | 2019-01-29 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110112526A (en) * | 2019-03-29 | 2019-08-09 | 电子科技大学 | A kind of microstrip power divider with dual-passband frequency response |
| CN110890610A (en) * | 2019-12-05 | 2020-03-17 | 电子科技大学 | Double-passband filter based on quarter-wave resonator |
| CN111082191B (en) * | 2019-12-25 | 2021-02-02 | 南通大学附属医院 | Duplexer with independently designed channels |
| CN113972456A (en) * | 2021-12-22 | 2022-01-25 | 南京典格通信科技有限公司 | Three-order wide stop band 5G microstrip filter |
| CN114497937A (en) * | 2022-01-04 | 2022-05-13 | 中信科移动通信技术股份有限公司 | Double-frequency microstrip filter |
| CN115189108A (en) * | 2022-08-08 | 2022-10-14 | 河南科技大学 | Double-passband filter based on multimode resonator |
| CN115295985A (en) * | 2022-07-18 | 2022-11-04 | 华南理工大学 | Dual-passband band-pass filter and system suitable for dual-band communication system |
| CN115425376A (en) * | 2022-09-29 | 2022-12-02 | 河南科技大学 | Double-passband filter based on branch knot loading |
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2018
- 2018-05-31 CN CN201820832076.4U patent/CN208444927U/en active Active
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110112526A (en) * | 2019-03-29 | 2019-08-09 | 电子科技大学 | A kind of microstrip power divider with dual-passband frequency response |
| CN110890610A (en) * | 2019-12-05 | 2020-03-17 | 电子科技大学 | Double-passband filter based on quarter-wave resonator |
| CN110890610B (en) * | 2019-12-05 | 2021-02-05 | 电子科技大学 | Double-passband filter based on quarter-wave resonator |
| CN111082191B (en) * | 2019-12-25 | 2021-02-02 | 南通大学附属医院 | Duplexer with independently designed channels |
| CN113972456A (en) * | 2021-12-22 | 2022-01-25 | 南京典格通信科技有限公司 | Three-order wide stop band 5G microstrip filter |
| CN113972456B (en) * | 2021-12-22 | 2022-04-19 | 南京典格通信科技有限公司 | Three-order wide stop band 5G microstrip filter |
| CN114497937A (en) * | 2022-01-04 | 2022-05-13 | 中信科移动通信技术股份有限公司 | Double-frequency microstrip filter |
| CN114497937B (en) * | 2022-01-04 | 2023-08-18 | 中信科移动通信技术股份有限公司 | Dual-frequency microstrip filter |
| CN115295985A (en) * | 2022-07-18 | 2022-11-04 | 华南理工大学 | Dual-passband band-pass filter and system suitable for dual-band communication system |
| CN115189108A (en) * | 2022-08-08 | 2022-10-14 | 河南科技大学 | Double-passband filter based on multimode resonator |
| CN115189108B (en) * | 2022-08-08 | 2023-10-20 | 河南科技大学 | Double-passband filter based on multimode resonator |
| CN115425376A (en) * | 2022-09-29 | 2022-12-02 | 河南科技大学 | Double-passband filter based on branch knot loading |
| CN115425376B (en) * | 2022-09-29 | 2023-09-08 | 河南科技大学 | Double-passband filter based on branch loading |
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