CN206422201U - A kind of Wide stop bands micro-strip triplexer based on cross resonator - Google Patents
A kind of Wide stop bands micro-strip triplexer based on cross resonator Download PDFInfo
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- CN206422201U CN206422201U CN201720021679.1U CN201720021679U CN206422201U CN 206422201 U CN206422201 U CN 206422201U CN 201720021679 U CN201720021679 U CN 201720021679U CN 206422201 U CN206422201 U CN 206422201U
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Abstract
The utility model discloses a kind of Wide stop bands micro-strip triplexer based on cross resonator, including input port, first, second, third output port, cross resonator, first, second, third, fourth open-circuit resonant device, first, second short-circuit resonant device；Cross resonator can produce resonance, three frequency three passages of correspondence, respectively first, second, third passage in three different frequencies；Input port, cross resonator that first passage is coupled successively by order, first, second short-circuit resonant device, the first output port are constituted；Input port, cross resonator that second channel is coupled successively by order, first, second open-circuit resonant device, the second output port are constituted；Input port, cross resonator that third channel is coupled successively by order, the three, the 4th open-circuit resonant devices, the 3rd output port are constituted.The utility model can realize good filtering characteristic and broad stop-band.
Description
Technical field
The utility model is related to the technical field of high-frequency element, refers in particular to a kind of Wide stop bands based on cross resonator
Micro-strip triplexer.
Background technology
Due to the high speed development of radio communication in recent years, the either popularization of 4G technologies, the burning hot of Internet of Things or 5G
Arrive, all indicate wireless technology and a booming peak period will be welcome.Wireless communication system of today, is substantially
The system of multiplexing, for time division duplex, is arranged in different timeslices and can just solve problem as long as will receive with sending out, and for
Frequency Division Multiplex, then needs the special device of design to make the electromagnetism of different frequency to reduce the quantity of antenna so as to save cost
Ripple shares common antenna without causing interference mutually, and such device is exactly multiplexer.And with the development of the communication technology, wirelessly
Performance requirement also more and more higher, miniaturization, Wide stop bands, high isolation, easily low cost, the design communicated for multiplexer, all turns into
Evaluate one of standard of a multiplexer performance.
Multiplexer, is typically all along with several bandpass filters are constituted by a matching network.Bandpass filter is real
Existing frequency selection and matching network then realize isolating between matching and passage of each passage with port.With a triplexer
Exemplified by, if each passage of the triplexer is Chebyshev's band-pass response of three ranks, generally requires a matching network and add
Upper 9 resonators, it is so that the size for making triplexer is larger and add production cost.And by making three bandpass filters
A public three mould resonators, can reduce by two resonators, and common resonant device can also realize the work(of matching network
Can, the size of such triplexer is possible to greatly reduce, and application surface also will be wider.
Prior art is investigated, it is specific as follows：
2006, Chi-Feng Chen et al. existed " IEEE TREANSACTIONS AND MICROWAVE THEORY
AND TECHNIQUES " on deliver entitled " Microstrip Diplexers Design With Common Resonator
Sections for Compact Size, But High Isolation ", common resonant is used as using step electric impedance resonator
Device, the bandpass filter of two opening resonance loop structures is connected, and forms a duplexer.
2006, Chi-Feng Chen et al. delivered topic on " Asia-Pacific Microwave Conference "
For " A Miniaturized Microstrip Common Resonator Triplexer without Extra
Matching Network ", using the step electric impedance resonator of three moulds, three bandpass filters are connected, and form three works
Device, but the high-frequency suppressing of the structure is not fine.
2011, Ming-Lin Chuang et al. existed " IEEE MICROWAVE AND WIRELESS COMPONENTS
LETTERS " on deliver entitled " Microstrip Diplexer Design Using Common T-Shaped
Resonator ", using T-shaped common resonant device, two bandpass filters are connected, and form a duplexer.The stopband of the structure
Not wide enough the and T-shaped resonator that is previously mentioned can only other two passages share.
Generally speaking, the multiplexer combined at present by bandpass filter designs comparative maturity, with modern portable
The development of formula wireless electronic product, miniaturization, cost is low, high frequency becomes the mark of duplexer research to and micro-strip multiplexer
These requirements can just be met.In terms of miniaturization, the researcher of various countries all did many work, and one of which method is just
It is to use common resonant device.But wherein overwhelming majority research is all based on duplexer and done, in terms of multiplexer it is few again
Few, stopband characteristic is good simple and compact for structure less.
The content of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art and shortcoming, it is proposed that one kind is based on cross resonance
The Wide stop bands micro-strip triplexer of device, can realize good filtering characteristic and broad stop-band, with flexible design, small volume,
Cost is low, Wide stop bands the advantages of.
To achieve the above object, technical scheme provided by the utility model is：A kind of width based on cross resonator
Stopband micro-strip triplexer, including input port, the first output port, the second output port, the 3rd output port, cross resonance
Device, the first, second, third, fourth open-circuit resonant device with 1/2nd wavelength, with quarter-wave first,
Two short-circuit resonant devices；The cross resonator can produce resonance in three different frequencies, and three frequency correspondences three are led to
Road, respectively first passage, second channel, third channel, three passages share same input port and cross resonator,
The centre frequency of three passages can be adjusted by adjusting the short-circuit transversal of cross resonator and the length of open stub, institute
State input port, cross resonator, the first short-circuit resonant device, the second short-circuit resonant that first passage is coupled successively by order
Device, the first output port are constituted, and the second channel is opened by the input port sequentially coupled successively, cross resonator, first
Road resonator, the second open-circuit resonant device, the second output port are constituted, the input that the third channel is coupled successively by order
Mouth, cross resonator, the 3rd open-circuit resonant device, the 4th open-circuit resonant device, the 3rd output port are constituted.
The first short-circuit resonant device, the 3rd open-circuit resonant device, the 4th open-circuit resonant device are reduced using bending structure
Size.
The cross resonator, the first short-circuit resonant device, on the feeder line of the second short-circuit resonant device and the first output port
Grounding through hole is offered, is short-circuit end.
The first, second short-circuit resonant device is operated at 1.57GHz, and the first, second open-circuit resonant device is operated in
At 2.4GHz, the three, the 4th open-circuit resonant device is operated at 3.5GHz, and each passage is three rank Chebyshevs response.
The input port, the second output port, the 3rd output port refer to coupled structure using double.
The input port, the first output port, the second output port, the 3rd output port are 50 ohm of impedance
Match somebody with somebody.
The utility model compared with prior art, has the following advantages that and beneficial effect：
1st, by introducing shared cross resonator, resonator is reduced while good filtering performance is realized
Quantity and the design for avoiding matching network, effectively reduce size and shorten the design cycle, be easier to the structure
Using.
2nd, being used in mixed way by cross resonator and polytype resonator, is ensureing their fundamental resonance frequencies phases
With in the case of, their higher mode is set to stagger, so as to realize the characteristic of a Wide stop bands, this in actual applications will very
Suppression of the good realization to high-frequency noise.
3rd, Wide stop bands micro-strip triplexer of the present utility model has compared with low insertion loss, good with outer selectivity, and filtering is special
The characteristics of property is good.
4th, because Wide stop bands micro-strip triplexer of the present utility model is microstrip structure, lightweight, cost is low, be adapted to industry batch
Amount production, therefore duplexer possesses the advantage that simple in construction, design is easy, manufacturing cost is cheap.
Brief description of the drawings
Fig. 1 is the structural representation of Wide stop bands micro-strip triplexer of the present utility model.
Fig. 2 is the scattering parameter simulation result of Wide stop bands micro-strip triplexer of the present utility model.
Fig. 3 is the parameters simulation result of the isolation strip of Wide stop bands micro-strip triplexer of the present utility model.
Fig. 4 is the stopband characteristic simulation result of Wide stop bands micro-strip triplexer of the present utility model.
Embodiment
The utility model is described further with reference to specific embodiment.
The Wide stop bands micro-strip triplexer that the present embodiment is provided is based primarily upon cross resonator, makes cross resonator point
Not in three different frequency resonance, it is set to be shared by three passbands.Other resonators of each passband can be selected voluntarily
And design.
Shown in Figure 1, the Wide stop bands micro-strip triplexer of the present embodiment is produced on two-sided cover in the manner of a printed circuit board
On copper micro-strip plate 1, micro-strip plate is in addition simultaneously to cover copper earth plate.The Wide stop bands micro-strip triplexer of the present embodiment includes input
Mouth Port1, the first output port Port4, the second output port Port3, the 3rd output port Port2, cross resonator 2,
The first, second, third, fourth open-circuit resonant device 10,12,14,15 with 1/2nd wavelength, with quarter-wave
First, second short-circuit resonant device 4,5；Cross resonator 2 can produce resonance, three frequency correspondences in three different frequencies
Three passages, respectively first passage, second channel, third channel, three passages share same input port Port1 and ten
Font resonator 2, the centre frequency of three passages can be by adjusting the short-circuit transversal 18 and open stub of cross resonator 2
13 length is adjusted, and input port Port1 that first passage is coupled successively by order, the short circuit of cross resonator 2, first are humorous
Shake device 4, the second short-circuit resonant device 5, the first output port Port4 is constituted, and second channel is by the input port that couples successively of order
Port1, cross resonator 2, the first open-circuit resonant device 10, the second open-circuit resonant device 12, the second output port Port3 are constituted,
Input port Port1, cross resonator 2, the 3rd open-circuit resonant device 14, the 4th open circuit that third channel is coupled successively by order
Resonator 15, the 3rd output port Port2 are constituted.Wherein, first, second short-circuit resonant device 4,5 is operated at 1.57GHz, the
First, the second open-circuit resonant device 10,12 is operated at 2.4GHz, and the three, the 4th open-circuit resonant devices 14,15 are operated at 3.5GHz,
Each passage is three rank Chebyshevs response.In order that structure is compacter in design, respectively to the first short-circuit resonant device 4,
3rd open-circuit resonant device 14, the 4th open-circuit resonant device 15 have carried out appropriate bending.Four port Port1, Port2, Port3,
Port4 is 50 ohm of impedance matching, for ease of the welding of SMA, the port reservation feeder line of sufficient length, 7 in figure, 9,
16th, 17 be port feedline, and input port Port1, the second output port Port3, the 3rd output port Port2 refer to coupling using double
Structure couples to obtain stronger end.3rd, 6,8 and 11 be grounding through hole, it is necessary to be connected with scolding tin with covering copper earth plate, is short
Terminal.
It is shown in Figure 2, it is shown that the scattering parameter simulation result of the above-mentioned Wide stop bands micro-strip triplexer of the present embodiment, wherein
Frequency of heart is respectively 1.57Ghz, 2.4Ghz and 3.5GHz.Transverse axis represents the signal frequency of Wide stop bands micro-strip triplexer, longitudinal axis table
Show amplitude, include the amplitude and return loss S11 amplitude of insertion loss (S12, S13), wherein S11 represents returning for port1
Ripple is lost, and S21, S31, S41 represent port1 and port3, port4 insertion loss respectively.Insertion loss represents signal
Relation between input power and the power output of another port signal, its corresponding mathematical function is：Power output/input
Power (dB)=20*log | S21 |.Return loss is represented between the input power of the port signal and the reflection power of signal
Relation, its corresponding mathematical function is as follows：Reflection power/incident power==20*log | S11 |.In the present embodiment, echo
Loss can reach more than 15dB, and the centre frequency of first passage is 1.57GHz, and relative bandwidth is 7%, and insertion loss is
1.81dB, the centre frequency of second channel is 2.4GHz, and relative bandwidth is 10.8%, and insertion loss is 1.06dB, third channel
Centre frequency be 3.5GHz, relative bandwidth is 5.4%, insertion loss be 1.9d B.
It is shown in Figure 3, it is shown that the parameters simulation result of the isolation strip of the above-mentioned Wide stop bands micro-strip triplexer of the present embodiment,
In the range of 1~4.5GHz, the absolute value that S32 reaches has arrived more than 50dB, and S42 absolute value reaches more than 34dB, and S43's is exhausted
More than 40dB is reached to value.
It is shown in Figure 4, it is shown that the stopband characteristic of the above-mentioned Wide stop bands micro-strip triplexer of the present embodiment, can from figure
More than 6 times of fundamental frequency can be reached to its 20dB stopband, and are still had further by further optimizing resonator structure
Raising space.
Embodiment described above is only the preferred embodiment of the utility model, not limits implementation of the present utility model with this
Scope, therefore the change that all shape, principles according to the utility model are made, all should cover in protection domain of the present utility model.
Claims (6)
1. a kind of Wide stop bands micro-strip triplexer based on cross resonator, it is characterised in that：Including input port, the first output
Port, the second output port, the 3rd output port, cross resonator, with 1/2nd wavelength first, second, third,
4th open-circuit resonant device, with quarter-wave first, second short-circuit resonant device；The cross resonator can be three
Individual different frequency produces resonance, respectively three frequency three passages of correspondence, first passage, second channel, third channel, three
Individual passage shares same input port and cross resonator, and the centre frequency of three passages can be humorous by adjusting cross
The short-circuit transversal of device and the length of open stub is shaken to adjust, input port that the first passage is coupled successively by order, ten
Font resonator, the first short-circuit resonant device, the second short-circuit resonant device, the first output port are constituted, and the second channel is by order
Input port, cross resonator, the first open-circuit resonant device, the second open-circuit resonant device, the second output port structure coupled successively
Into input port, cross resonator, the 3rd open-circuit resonant device, the 4th open circuit that the third channel is coupled successively by order
Resonator, the 3rd output port are constituted.
2. a kind of Wide stop bands micro-strip triplexer based on cross resonator according to claim 1, it is characterised in that：Institute
State the first short-circuit resonant device, the 3rd open-circuit resonant device, the 4th open-circuit resonant device and size is reduced using bending structure.
3. a kind of Wide stop bands micro-strip triplexer based on cross resonator according to claim 1, it is characterised in that：Institute
Offer and connect on the feeder line for stating cross resonator, the first short-circuit resonant device, the second short-circuit resonant device and the first output port
Ground through hole, is short-circuit end.
4. a kind of Wide stop bands micro-strip triplexer based on cross resonator according to claim 1, it is characterised in that：Institute
State first, second short-circuit resonant device to be operated at 1.57GHz, the first, second open-circuit resonant device is operated at 2.4GHz, institute
State the three, the 4th open-circuit resonant devices to be operated at 3.5GHz, each passage is three rank Chebyshevs response.
5. a kind of Wide stop bands micro-strip triplexer based on cross resonator according to claim 1, it is characterised in that：Institute
State input port, the second output port, the 3rd output port and refer to coupled structure using double.
6. a kind of Wide stop bands micro-strip triplexer based on cross resonator according to claim 1, it is characterised in that：Institute
State the impedance matching that input port, the first output port, the second output port, the 3rd output port are 50 ohm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201720021679.1U CN206422201U (en) | 2017-01-09 | 2017-01-09 | A kind of Wide stop bands micro-strip triplexer based on cross resonator |
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| CN201720021679.1U CN206422201U (en) | 2017-01-09 | 2017-01-09 | A kind of Wide stop bands micro-strip triplexer based on cross resonator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106848516A (en) * | 2017-01-09 | 2017-06-13 | 华南理工大学 | A kind of Wide stop bands micro-strip triplexer based on cross resonator |
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- 2017-01-09 CN CN201720021679.1U patent/CN206422201U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106848516A (en) * | 2017-01-09 | 2017-06-13 | 华南理工大学 | A kind of Wide stop bands micro-strip triplexer based on cross resonator |
| CN106848516B (en) * | 2017-01-09 | 2020-04-07 | 华南理工大学 | Wide stop band microstrip triplexer based on cross-shaped resonator |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170818 Termination date: 20200109 |