CN207149671U - Duplexer - Google Patents
Duplexer Download PDFInfo
- Publication number
- CN207149671U CN207149671U CN201721163008.5U CN201721163008U CN207149671U CN 207149671 U CN207149671 U CN 207149671U CN 201721163008 U CN201721163008 U CN 201721163008U CN 207149671 U CN207149671 U CN 207149671U
- Authority
- CN
- China
- Prior art keywords
- inductance
- module
- duplexer
- port
- series
- 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.)
- Withdrawn - After Issue
Links
Landscapes
- Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)
Abstract
The utility model discloses a kind of duplexer, the duplexer includes：Antenna port, for reception or transmission signal；Accept filter module, and for handling the signal of the antenna port reception and producing an input signal, its one end is connected to receiving port, and the input signal passes through the receiving port and carries out downlink transfer；Launch filtration module, its one end is connected to emission port, and for handling the signal transmitted by the emission port and producing an output signal, the output signal carries out uplink by antenna port；Phse conversion module, its one end are connected to antenna port, and the other end is connected to the module that accepts filter, for improving the isolation to accept filter between module and transmitting filtration module passband and reducing Insertion Loss etc..The utility model realizes effective replacement to transmission line using phse conversion module, reduces the package dimension of device, simplifies the preparation technology of device, reduces preparation difficulty, while improves the electrical performance indexes of product.
Description
【Technical field】
It the utility model is related to wave filter technology field, more particularly to a kind of duplexer.
【Background technology】
Duplexer is three port devices, is mainly made up of two bandpass filters, the common port of two wave filters
Referred to as antenna port (ANT), two-port is respectively emission port (Tx) and receiving port (Rx) in addition.Two bandpass filters point
Frequency range Dui Ying not launched and receive frequency range, the duplexer of such a form requires very high to single filter electrical performance indexes.My god
Suitable match circuit must be connected between line end and transmitting and receiving filter to can be only achieved echo and the requirement such as isolate.If device
In be not added with match circuit, duplexer Tx and Rx interchannel is difficult to high-isolation, and Tx signals can produce interference, and two to Rx
The echo of individual passage is also very poor, increases the Insertion Loss of passage.
Generally, the match circuit in duplexer is one section of transmission line, optimizes echo and isolation index by the transmission line,
It realizes and is relatively easy on traditional large scale duplexer.By taking film bulk acoustic (FBAR) duplexer as an example, FBAR is currently based on
The radio-frequency devices package dimension of technology has narrowed down to 1~2 millimeter, and under 2GHz or so frequencies, its transmission line is up to 37mm,
It is difficult to realize that the transmission line of the size is integrated in radio-frequency front-end, and this brings extreme difficulties to the small-sized encapsulated of duplexer.
【Utility model content】
To overcome above-mentioned technical problem or solving above-mentioned technical problem at least in part, spy proposes following technical scheme：
The utility model provides a kind of duplexer, including：
Antenna port, for reception or transmission signal；
Accept filter module, for handling signal and one input signal of generation that the antenna port receives, its one end company
Receiving port is connected to, the input signal carries out downlink transfer by the receiving port；
Launch filtration module, its one end is connected to emission port, for handling the signal transmitted by the emission port
And an output signal is produced, the output signal carries out uplink by antenna port；
Phse conversion module, its one end are connected to antenna port, and the other end is connected to the module that accepts filter, for carrying
Isolation between the module that accepted filter described in height and transmitting filtration module passband；
Wherein, the phse conversion module includes the first inductance of at least two series connection and is parallel to two neighboring the
The first parallel units between one inductance.
Specifically, first parallel units include the first harmonic oscillator and the second inductance being connected in series；Described first is humorous
Between oscillator one end is connected to per two neighboring first inductance, one end ground connection of second inductance.
Specifically, it is described accept filter module and launch filtration module respectively including some series connection the first series unit and
The second parallel units between being parallel to respectively per two neighboring first series unit.
Specifically, it is described accept filter module and/or transmitting filtration module also include directly be series at receiving port and/or
3rd inductance of emission port.
Specifically, first series unit includes at least one second harmonic oscillator.
Specifically, second parallel units include the 3rd harmonic oscillator and the 4th inductance being connected in series；4th electricity
One end of sense connects the 3rd harmonic oscillator, other end ground connection.
Preferably, first parallel units include the first harmonic oscillator, and described first harmonic oscillator one end is connected to adjacent two
Between individual first inductance, other end ground connection.
Preferably, first parallel units include the 5th inductance；Described 5th inductance one end is connected to two neighboring institute
Between stating the first inductance, other end ground connection.
Preferably, the phse conversion module also includes being series at the antenna port and accepts filter the 1/4 of intermodule
Wavelength transmission line.
Preferably, the duplexer is bulk acoustic wave duplexer.
Compared with prior art, the utility model possesses following advantage：
The utility model is using the first inductance for including at least two series connection and is parallel to two neighboring first inductance
Between the phse conversion modules of the first parallel units effectively substituted for transmission line, reduce the face of transmission line Corresponding matching circuit
Product, effectively reduce the package dimension of device, substantially reduce the encapsulation difficulty of device, realize duplexer device it is small
Type.Simultaneously as the first parallel units are also required to match the second inductance, therefore second inductance and the first inductance can be simultaneously
Prepare, eliminate the technique for preparing transmission line, reduce process complexity, the topological structure of this optimization effectively lifts device
Electrical performance indexes.
【Brief description of the drawings】
The accompanying drawing for forming the part of the application is used for providing further understanding to of the present utility model, of the present utility model
Schematic description and description is used to explain the utility model, does not form to improper restriction of the present utility model.In accompanying drawing
In：
Fig. 1 is a kind of example structure block diagram of duplexer in the utility model；
Fig. 2 is a kind of first embodiment structured flowchart of the phse conversion module of duplexer in the utility model；
Fig. 3 is a kind of second embodiment structured flowchart of the phse conversion module of duplexer in the utility model；
Fig. 4 is a kind of 3rd embodiment structured flowchart of the phse conversion module of duplexer in the utility model；
Fig. 5 is a kind of first embodiment structured flowchart of the single module that accepts filter of duplexer in the utility model；
Fig. 6 is a kind of second embodiment structured flowchart of the single module that accepts filter of duplexer in the utility model；
Fig. 7 is a kind of fourth embodiment structured flowchart of the phse conversion module of duplexer in the utility model；
Fig. 8 is the front and rear frequency response curve comparison schematic diagram of duplexer equivalence replacement of the present utility model optimization.
【Embodiment】
Embodiment of the present utility model is described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning
Same or similar element is represented to same or similar label eventually or there is the element of same or like function.Below by ginseng
The embodiment for examining accompanying drawing description is exemplary, is only used for explaining the utility model, and can not be construed to of the present utility model
Limitation.
Those skilled in the art of the present technique are appreciated that unless otherwise defined, all terms used herein (including technology art
Language and scientific terminology), there is the general understanding identical meaning with the those of ordinary skill in the utility model art.Also
It should be understood that those terms defined in such as general dictionary, it should be understood that there is the context with prior art
In the consistent meaning of meaning, and unless by specific definitions as here, otherwise will not use idealization or overly formal
Implication is explained.
In order that those skilled in the art more fully understand the scheme of the utility model embodiment, below in conjunction with the accompanying drawings and
The utility model is described in further detail for embodiment.Following examples are exemplary, are only used for explaining this practicality
It is new, and can not be construed to limitation of the present utility model.
The structured flowchart of the embodiment of the duplexer shown in accompanying drawing 1 is referred to, the utility model provides a kind of duplexer, bag
Include：Antenna port 1, the module that accepts filter 2, transmitting filtration module 3 and phse conversion module 4.Wherein, the antenna port 1
For reception or transmission signal；The module 2 that accepts filter, for handling signal and the generation one that the antenna port 1 receives
Input signal, its one end are connected to receiving port 5, and the input signal carries out downlink transfer by the receiving port 5；The hair
Filtration module 3 is penetrated, its one end is connected to emission port 6, for handling the signal transmitted by the emission port 6 and generation one
Output signal, the output signal carry out uplink by antenna port 1；
In the utility model embodiment, the input signal by the downlink transfer of receiving port 5 to the reception
Port 5 connect other signal processing modules, other described signal processing modules be used for input signal is entered line translation, valuation,
Enhancing, compression, identification, amplification, filtering, modulation and demodulation in any one or more.
In the utility model embodiment, the output signal by the uplink of antenna port 1 to the duplexer pair
Equipment is answered to realize the terminal of telecommunication.
In the utility model embodiment, the first embodiment structural frames of the phse conversion module 4 as shown in Figure 2
Figure, the phse conversion module 4, its one end are connected to antenna port 1, and the other end is connected to the module 2 that accepts filter, is used for
Isolation and reduction Insertion Loss between the module that accepted filter described in raising 2 and the transmitting passband of filtration module 3.
Wherein, the phse conversion module 4 includes the first inductance 41 of at least two series connection and is parallel to two neighboring
The first parallel units 42 between first inductance 41.
Specifically, first parallel units 42 include the first harmonic oscillator 421 and the second inductance 422 being connected in series；Institute
State the one end of the first harmonic oscillator 421 to be connected between every two neighboring first inductance 41, one end ground connection of second inductance 422.
Optionally, the second embodiment structured flowchart of the phse conversion module 4 as shown in Figure 3, the phase become
First parallel units 42 of mold changing block 4 include the first harmonic oscillator 421, and described one end of first harmonic oscillator 421 is connected to two neighboring
Between first inductance 41, other end ground connection.
Optionally, the 3rd embodiment structured flowchart of the phse conversion module 4 as shown in Figure 4, the phase become
First parallel units 42 of mold changing block 4 include the 5th inductance 43；Described one end of 5th inductance 43 is connected to two neighboring described
Between one inductance 41, other end ground connection.
Optionally, the fourth embodiment structured flowchart of the phse conversion module 4 as shown in Figure 7, the phase become
Mold changing block 4 also includes the transmission line 7 for being series at the antenna port 1 between the module 2 that accepts filter, and the transmission line includes 1/4
Wavelength transmission line.
The first embodiment structured flowchart of the single module 2 that accepts filter shown in accompanying drawing 5 is referred to, it is described in the utility model
The module that accepts filter 2 and transmitting filtration module 3 include the first series unit 100 of some series connection and are parallel to every phase respectively respectively
The second parallel units 110 between adjacent two the first series units 100.
In the utility model embodiment, it is described accept filter module 2 and/or transmitting filtration module 3 also include directly series connection
In receiving port 5 and/or the 3rd inductance 120 of emission port 6.
In the utility model embodiment, first series unit 100 includes at least one second harmonic oscillator 1001.
In the utility model embodiment, second parallel units 110 include the He of the 3rd harmonic oscillator 1101 being connected in series
4th inductance 1102；One end of 4th inductance 1102 connects the 3rd harmonic oscillator 1101, other end ground connection.
It should be noted that the first inductance 41 described in the utility model embodiment, the second inductance 422, the 3rd inductance
120th, the 4th inductance 1102 and the 5th inductance 43 set identical or different capacitance respectively, the capacitance between above-mentioned inductance
It is identical or different be mainly reflected between the circle of coil and circle, coil and magnetic core electric capacity, the capacitance of inductance is smaller, and its is steady
It is qualitative better.Due to the link position of inductance it is different and be divided into first inductance 41, the second inductance 422, the 3rd inductance 120,
4th inductance 1102 and the 5th inductance 43, its debugging for having no effect on the flexible replacement between inductance to play effect.
The second embodiment structured flowchart of the single module 2 that accepts filter shown in accompanying drawing 6 is referred to, it is described in the utility model
The module that accepts filter 2 and transmitting filtration module 3 include the first series unit 100 of some series connection and are parallel to every phase respectively respectively
The second parallel units 110 between adjacent two the first series units 100；First series unit 100 includes at least one second
Harmonic oscillator 1001；Described at least part of second parallel units 110 include two the 3rd harmonic oscillators 1101 in parallel and with two
4th inductance 1102 of the 3rd harmonic oscillator 1101 series connection after parallel connection；Second parallel units 110 at least partly also include string
Join the 3rd harmonic oscillator 1101 and the 4th inductance 1102 of connection.
In the utility model embodiment, duplexer has some following index：Working frequency and bandwidth, isolation, insertion
Loss, frequency stability, characteristic impedance, maximal input, standing-wave ratio etc..
In the utility model embodiment, the duplexer is bulk acoustic wave duplexer, and the bulk acoustic wave duplexer has volume
Small, the advantages that frequency is high, Insertion Loss is small, power is big.
The operating frequency range of wherein described duplexer should not be narrower than the operating frequency range of application in itself；It is described
Bandwidth includes accept filter the input bandwidth of module 2 and the output bandwidth of transmitting filtration module 3.For duplexer, isolation
Degree refers to receiving channel and the pass band damping amount of transmission channel, the isolation of the receiving terminal and transmitting terminal of duplexer to antenna end
It is suitable, ensures that interchannel signal is independent of each other；The insertion loss represents that passband frequency is to useful signal in respective channel
Loss, its insertion loss is relevant with input wavelength, also relevant with off state, is defined as：IL=-10log (Po/Pi) or IL
=20lg (Uo/Ui), wherein, IL is Insertion Loss, and Pi represents to be input to the power of input port, and Po represents to receive from output port
Power, Uo is output signal, and Ui is input signal.
In the utility model embodiment, it is that its lateral dimension is much smaller than operation wavelength the characteristics of the transmission line, not only uses
In transmission electric energy and electric signal, reactive resonant element can also be formed.For example, length is less than the transmission line of 1/4 wavelength, its
Input impedance is induction reactance or capacitive reactance；Adjustable length short-circuit line can be used as allocating element.And for example length is the short-circuit line of 1/4 wavelength
Or open-circuit line is equivalent to resonance circuit in parallel or series, referred to as resonance line respectively；The input impedance of wherein 1/4 wavelength short-circuit line is
Infinity, it can be used as metal-insulator support etc..In addition, artificial line etc. also is made using the time-delay characteristics of distributed constant transmission line
Circuit element.
In the utility model embodiment, if without the phse conversion module 4, two-way filter is joined directly together in common port,
The Tx signals of now antenna end transmission can be transmitted to Rx and Tx two-way simultaneously, and wherein Tx signals can be sent out at the module 2 that accepts filter
Raw to reflect, now 180 ° of transformations can occur for phase, i.e. reflection Tx signals and former Tx signal phases is on the contrary, the meeting at public port
Node is formed, signal is cancelled out each other, now the Tx signals between ANT and Tx are had an impact from the signal that Rx ends are reflected back, and is sent out
It is difficult to accomplish preferably to match to penetrate wave filter, and the echo that such case will result directly in device is very poor.
In the utility model embodiment, to make Tx signals not disturbed by reflected signal, antenna port and received passband it
Between connect the phse conversion module 4, now the reflected signal in receiving path passes through the phse conversion module 4 twice,
The phase place change that signal can be made to produce 180 °, plus 180 ° of phase place changes at the module 2 that accepts filter, reflect and believe in public port
360 degree of phase place change number can be produced, now reflected signal is identical with original signal phase, will not produce signal cancellation；Rx signals
And same principle.After impedance matching, Tx isolates with Rx paths to be improved, and interference between the two reduces, and echo is just
It can meet to require.
In the utility model embodiment, using series connection the first inductance 41 and be parallel to respectively per two neighboring first electricity
Transmission line described in the equivalence replacement of the first parallel units 42 between sense 41, optimizing the index such as debugging back echo and isolation is had
The lifting of effect, the front and rear frequency response curve comparison schematic diagram of duplexer equivalence replacement as shown in Figure 8 optimization, i.e., using as schemed
The Parameter Map that duplexer equivalent-circuit model shown in 1 and Fig. 7 is drawn after being emulated, wherein A are to be imitated using transmission line
The frequency response curve obtained after true experiment, B are that transmission line described in equivalence replacement is series connection provided by the utility model
One inductance 41 and the first parallel units 42 being parallel to respectively between every two neighboring first inductance 41 obtain after carrying out l-G simulation test
The frequency response curve arrived.By can be seen that equivalent substitution back echo index improves in Fig. 8, the fluctuation in passband reduces, and logical
Out-of-band rejection ability increases.The series electrical of phse conversion module 4 and the Corresponding matching circuit of transmission line 7 shown in Fig. 1 and Fig. 7
Sense is respectively 0.2nH, 2.8nH, it is seen that its inductance value is small after equivalence replacement, reduces the complexity of technique, is advantageous to device
Miniaturization.
It should be noted that phse conversion module described in the utility model embodiment 4 not only may connect to the antenna
Between port 1 and the module 2 that accepts filter, it is also connected between the antenna port 1 and transmitting filtration module 3, in addition also
Other positions can be connected to, it is every to apply the phse conversion module 4 provided by the utility model it is believed that at this
In the range of utility model is protected, just do not add to repeat herein.
In the utility model embodiment, phse conversion module 4 and transmission are related in the optimization replacement process of the duplexer
The inductance value calculation of the Corresponding matching circuit of line 7, the formula operation being directed to include any one or more：
Wherein under the equivalent-circuit model of duplexer, its electrical parameter includes：Direct capacitance C0, mechanical oscillation are associated
Equivalent capacity Cm, inductance Lm, related to loss resistance Rm, series resonance son series resonance frequency fs, parallel resonance
Parallel resonance frequency fp, electromechanical coupling factorAnd the quality factor q of harmonic oscillator.
In single filter structure, series resonance frequency fsDetermined by device piezoelectric layer thickness etc., electromechanical coupling factorTo be together decided on by the piezoelectric itself that grows and growth technique, can approximation regard constant as.
Wherein during Optimization Debugging, bulk accoustic wave filter " static state " electric capacity C0, series resonance frequency fs, harmonic oscillator product
Prime factor Q, wave filter relative bandwidth B.These basic parameters can be by actual measurement or to duplexer equivalent-circuit model
Obtained in emulation.By impedance measurement, parallel resonance frequency f can extract outpAnd C0。
It should be noted that the calculation formula of parameter described in the utility model is not limited to above-mentioned shown formula, also
Other formula can be included, such as:Q=1/ ωsCmRm、Deng just not adding to repeat herein.
In summary, the utility model is parallel to using the first inductance for including at least two series connection and respectively every phase
The phse conversion module of the first parallel units between adjacent two the first inductance effectively substituted for traditional transmission line, reduce matching electricity
The area on road, the package dimension of device is effectively reduced, substantially reduce the encapsulation difficulty of device, realize the device of duplexer
The miniaturization of part.Simultaneously as the first parallel units of wave filter are also required to match the second inductance, therefore second inductance and the
One inductance can be prepared simultaneously, eliminate the technique for preparing transmission line, reduce process complexity, the topological structure of this optimization
The effectively electrical performance indexes of lifting device.
In the specification that this place provides, although the description of substantial amounts of detail.It is to be appreciated, however, that this practicality
New embodiment can be put into practice in the case of these no details.In certain embodiments, public affairs are not been shown in detail
The duplexer and structure and technology known, so as not to obscure the understanding of this description.
Although having been illustrated with some exemplary embodiments of the present utility model above, those skilled in the art will
Understand, in the case where not departing from principle or spirit of the present utility model, these exemplary embodiments can be made a change, its
He it is any without departing from Spirit Essence of the present utility model with made under principle change, modification, replacement, combine, simplification, all should
For equivalent substitute mode, it is all contained within the scope of protection of the utility model, the scope of the utility model is by claim
And its equivalent limits.
Claims (10)
- A kind of 1. duplexer, it is characterised in that including：Antenna port, for reception or transmission signal；Accepted filter module, and for handling the signal of the antenna port reception and producing an input signal, its one end is connected to Receiving port, the input signal carry out downlink transfer by the receiving port；Launch filtration module, its one end is connected to emission port, for handling the signal transmitted by the emission port and production A raw output signal, the output signal carry out uplink by antenna port；Phse conversion module, its one end are connected to antenna port, and the other end is connected to the module that accepts filter, for improving State the isolation to accept filter between module and transmitting filtration module passband；Wherein, the phse conversion module includes the first inductance of at least two series connection and is parallel to two neighboring first electricity The first parallel units between sense.
- 2. duplexer according to claim 1, it is characterised in that first parallel units include being connected in series first humorous Oscillator and the second inductance；Between described first harmonic oscillator one end is connected to per two neighboring first inductance, the one of second inductance End ground connection.
- 3. duplexer according to claim 1, it is characterised in that module and the transmitting filtration module of accepting filter wraps respectively The second parallel units between including the first series unit of some series connection and being parallel to respectively per two neighboring first series unit.
- 4. duplexer according to claim 3, it is characterised in that it is described accept filter module and/or transmitting filtration module also The 3rd inductance including being directly series at receiving port and/or emission port.
- 5. duplexer according to claim 3, it is characterised in that first series unit includes at least one second resonance Son.
- 6. duplexer according to claim 3, it is characterised in that second parallel units include being connected in series the 3rd humorous Oscillator and the 4th inductance；One end of 4th inductance connects the 3rd harmonic oscillator, other end ground connection.
- 7. duplexer according to claim 1, it is characterised in that first parallel units include the first harmonic oscillator, described First harmonic oscillator one end is connected between two neighboring first inductance, other end ground connection.
- 8. duplexer according to claim 1, it is characterised in that first parallel units include the 5th inductance；Described Five inductance one end are connected between two neighboring first inductance, other end ground connection.
- 9. duplexer according to claim 1, it is characterised in that the phse conversion module also includes being series at the antenna Port and 1/4 wavelength transmission line of the intermodule that accepts filter.
- 10. duplexer according to any one of claim 1 to 9, it is characterised in that：The duplexer is bulk acoustic wave duplex Device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721163008.5U CN207149671U (en) | 2017-09-11 | 2017-09-11 | Duplexer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721163008.5U CN207149671U (en) | 2017-09-11 | 2017-09-11 | Duplexer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207149671U true CN207149671U (en) | 2018-03-27 |
Family
ID=61678576
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721163008.5U Withdrawn - After Issue CN207149671U (en) | 2017-09-11 | 2017-09-11 | Duplexer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207149671U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107508019A (en) * | 2017-09-11 | 2017-12-22 | 京信通信系统（中国）有限公司 | Duplexer |
-
2017
- 2017-09-11 CN CN201721163008.5U patent/CN207149671U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107508019A (en) * | 2017-09-11 | 2017-12-22 | 京信通信系统（中国）有限公司 | Duplexer |
| CN107508019B (en) * | 2017-09-11 | 2020-07-28 | 京信通信技术(广州)有限公司 | Duplexer |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Srisathit et al. | High isolation and compact size microstrip hairpin diplexer | |
| CN101018070B (en) | Duplexer | |
| CN104412268A (en) | Improved design of microwave acoustic wave filters | |
| WO2021147632A1 (en) | Topological structure of quadplexer | |
| CN109713407A (en) | A kind of trapezium structure duplexer and the method for improving duplexer isolation | |
| CN104900948B (en) | A kind of line of rabbet joint couple feed band logical unit of multifrequency balance filter/duplexer | |
| WO2020125344A1 (en) | Radio frequency piezoelectric multiplexer for improving isolation based on phase-shift network and electronic device | |
| CN103972622B (en) | A kind of cavity body filter and communication radio frequency device | |
| CN107493082A (en) | A kind of dual-passband amplifier | |
| CN102509829A (en) | Miniature C-band band-pass filter with low insertion loss and excellent high-order harmonic suppression | |
| CN207149671U (en) | Duplexer | |
| CN110165347A (en) | A kind of high isolation microstrip duplexer of load open circuit minor matters | |
| CN109037879A (en) | A kind of substrate integration wave-guide filter couplers based on orthogonal degenerate mode | |
| CN115882813A (en) | Based on surface acoustic wave-lumped element combination syntonizer and band-pass filter | |
| CN106058393A (en) | Miniaturized cavity duplexer applied to digital repeaters | |
| CN107508019A (en) | Duplexer | |
| CN104078726A (en) | Parallel connection type unilateral elliptic function transmission line filter | |
| CN212517462U (en) | Tuning duplexer, radio frequency circuit and communication equipment | |
| CN206388828U (en) | One kind miniaturization VHF bandpass filters | |
| CN116054772B (en) | Wide common mode rejection balanced band-pass filter | |
| CN205828610U (en) | A kind of miniaturization cavity duplexer being applied to digital high-frequency amplification station | |
| CN208570878U (en) | A kind of substrate integration wave-guide filter couplers based on orthogonal degenerate mode | |
| CN218772033U (en) | Small-size filter and duplexer with same | |
| CN208970708U (en) | Cavity body filter and communication radio frequency device | |
| CN106252795A (en) | A kind of LTE duplexer and coupling window design method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200131 Address after: 510730 Guangdong city of Guangzhou province Guangzhou economic and Technological Development Zone Jinbi Road No. 6 Patentee after: COMBA TELECOM TECHNOLOGY (GUANGZHOU) Ltd. Address before: 510663 Guangzhou Science City, Guangdong Shenzhou Road, No. 10 Co-patentee before: COMBA TELECOM TECHNOLOGY (GUANGZHOU) Ltd. Patentee before: Comba Telecom System (China) Ltd. Co-patentee before: COMBA TELECOM SYSTEMS (GUANGZHOU) Ltd. Co-patentee before: TIANJIN COMBA TELECOM SYSTEMS Ltd. |
|
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20180327 Effective date of abandoning: 20200728 |