CN105490644A - Method and device for improving insulation of circulator of power amplifier - Google Patents
Method and device for improving insulation of circulator of power amplifier Download PDFInfo
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- CN105490644A CN105490644A CN201410531083.7A CN201410531083A CN105490644A CN 105490644 A CN105490644 A CN 105490644A CN 201410531083 A CN201410531083 A CN 201410531083A CN 105490644 A CN105490644 A CN 105490644A
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- 238000009413 insulation Methods 0.000 title abstract 4
- 238000002955 isolation Methods 0.000 claims description 81
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Classifications
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/20—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
- H03F3/24—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers of transmitter output stages
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/189—High-frequency amplifiers, e.g. radio frequency amplifiers
- H03F3/19—High-frequency amplifiers, e.g. radio frequency amplifiers with semiconductor devices only
- H03F3/195—High-frequency amplifiers, e.g. radio frequency amplifiers with semiconductor devices only in integrated circuits
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F2200/00—Indexing scheme relating to amplifiers
- H03F2200/451—Indexing scheme relating to amplifiers the amplifier being a radio frequency amplifier
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Abstract
The invention discloses a method and a device for improving the insulation of a circulator of a power amplifier. The method comprises the steps of computing the relation between the insulation of a first port and a second port and the load impedance of a third port of the circulator, and determining the requirement on the load impedance of the third port when the insulation is maximal; and performing impedance matching design on the circulator according to the requirement on the load impedance of the third port. By means of the method and the device provided by the invention, the power amplification index can be regulated and optimized, and the performance of the base station can be enhanced.
Description
Technical field
The present invention relates to circulator technical field, particularly relate to a kind of method and the device that improve power amplifier circulator isolation.
Background technology
Power amplifier module, as the final stage unit in Remote Radio Unit (RadioRemoteUnit, referred to as RRU) system, plays a part very important in whole RRU system.Meanwhile, how power amplifier module, as unit relatively unstable in RRU system, promotes power amplifier performance index and more and more comes into one's own, and the quality of power amplifier index directly affects the work quality of whole system.As power amplifier, larger power output and higher efficiency should be had, also will meet the requirement of bandwidth, gain and stability simultaneously.Under power amplifier is in large signal operation state, so be easy to occur the problems such as linear distortion, so how to make power amplifier stable working state by methods such as design match circuits, just become the key in key.
In the prior art, general radio circuit design is directly perceived and easily for the design comparison such as impedance matching of reference plane position, but for the design comparison difficulty at non-reference face place, such as, how the load impedance of circulator isolation end designs, and ensures that the isolation of circulator is maximum; How the coupling of the near-end of amplifier designs, and ensure the best of the standing wave after one section of non-50 ohm microstrip etc., these can only be attempted by simple method for designing, cannot design intuitively.
Summary of the invention
Simple method for designing can be used in view of in prior art to attempt during radio circuit design, the problem designed cannot be carried out intuitively, propose the present invention to provide a kind of method and the device that improve power amplifier circulator isolation.
The invention provides a kind of method improving power amplifier circulator isolation, comprising:
Calculate the relation of the load impedance of the first port of circulator and the isolation of the second port and the 3rd port, the load impedance requirement of the 3rd port when determining that isolation is maximum;
The designing impedance matching of carrying out circulator is required according to the load impedance of the 3rd port.
Preferably, the relation calculating the load impedance of the first port of circulator and the isolation of the second port and the 3rd port specifically comprises:
The relation of the load impedance of the first port of circulator and the isolation of the second port and the 3rd port is calculated according to formula 1:
formula 1;
Wherein, S
instead=S
12, be the transmission coefficient of the second port to the first port, b
1be the reflection power that the first port receives, a
2be the reflection power of the second port, S
33be the reflection coefficient of the 3rd port, S
32be the transmission coefficient of the second port to the 3rd port, S
13be the transmission coefficient of the 3rd port to the first port, Γ is the impedance reflection coefficient of circulator the 3rd port.
Preferably, when determining that isolation is maximum, the load impedance of the 3rd port requires specifically to comprise:
When determining that isolation is maximum according to formula 2, formula 3 and formula 4, the load impedance of the 3rd port requires:
formula 2;
Preferably, require that the designing impedance matching of carrying out circulator specifically comprises according to the load impedance of the 3rd port:
The designing impedance matching of circulator is carried out after the source impedance of circulator being arranged to the conjugation of Γ.
Preferably, circulator specifically comprises: arrowband circulator and broad-band circulator.
Present invention also offers a kind of device improving power amplifier circulator isolation, comprising:
Computing module, for the relation of the isolation of the first port and the second port that calculates circulator and the load impedance of the 3rd port, the load impedance requirement of the 3rd port when determining that isolation is maximum;
Processing module, for requiring the designing impedance matching of carrying out circulator according to the load impedance of the 3rd port.
Preferably, computing module specifically for:
The relation of the load impedance of the first port of circulator and the isolation of the second port and the 3rd port is calculated according to formula 1:
formula 1;
Wherein, S
instead=S
12, be the transmission coefficient of the second port to the first port, b
1be the reflection power that the first port receives, a
2be the reflection power of the second port, S
33be the reflection coefficient of the 3rd port, S
32be the transmission coefficient of the second port to the 3rd port, S
13be the transmission coefficient of the 3rd port to the first port, Γ is the impedance reflection coefficient of circulator the 3rd port.
Preferably, computing module specifically for:
When determining that isolation is maximum according to formula 2, formula 3 and formula 4, the load impedance of the 3rd port requires:
formula 2;
Preferably, processing module specifically for:
The designing impedance matching of circulator is carried out after the source impedance of circulator being arranged to the conjugation of Γ.
Preferably, circulator specifically comprises: arrowband circulator and broad-band circulator.
Beneficial effect of the present invention is as follows:
By the relation of the isolation and the 3rd port load impedance of first deriving circulator, thus obtain isolation maximum time the requirement of the 3rd port Impedance, the 3rd port is transferred to reference to face, again with the load of the 3rd port for target carries out designing impedance matching, simple method for designing can be used to attempt when solving radio circuit design in prior art, the problem designed cannot be carried out intuitively, can adjusting and optimizing power amplifier index, improve base station performance.
Above-mentioned explanation is only the general introduction of technical solution of the present invention, in order to technological means of the present invention can be better understood, and can be implemented according to the content of specification, and can become apparent, below especially exemplified by the specific embodiment of the present invention to allow above and other objects of the present invention, feature and advantage.
Accompanying drawing explanation
By reading hereafter detailed description of the preferred embodiment, various other advantage and benefit will become cheer and bright for those of ordinary skill in the art.Accompanying drawing only for illustrating the object of preferred implementation, and does not think limitation of the present invention.And in whole accompanying drawing, represent identical parts by identical reference symbol.In the accompanying drawings:
Fig. 1 is the flow chart of the method for the raising power amplifier circulator isolation of the embodiment of the present invention;
Fig. 2 is the schematic diagram of the circulator equivalent network of the embodiment of the present invention;
Fig. 3 is circulator simulating schematic diagram and the simulation result schematic diagram of the embodiment of the present invention;
Impedance checking schematic diagram when Fig. 4 is isolation the best of the embodiment of the present invention;
Fig. 5 is the schematic diagram of the circuit design embodiment plane of reference of the embodiment of the present invention;
Fig. 6 is the schematic diagram that the source impedance of the designing impedance matching of the embodiment of the present invention is arranged;
Fig. 7 is the arrowband matching principle schematic diagram of the embodiment of the present invention;
Fig. 8 is the arrowband matching result schematic diagram of the embodiment of the present invention;
Fig. 9 is the arrowband isolation checking principle schematic of the embodiment of the present invention;
Figure 10 is the schematic diagram of the arrowband the result of the embodiment of the present invention;
Figure 11 is the Broadband Matching design diagram of the embodiment of the present invention;
Figure 12 is the Broadband Matching principle schematic of the embodiment of the present invention;
Figure 13 is the schematic diagram one of Broadband Matching result of the invention process;
Figure 14 is the schematic diagram two of the Broadband Matching result of the embodiment of the present invention;
Figure 15 is the structural representation of the device of the raising power amplifier circulator isolation of the embodiment of the present invention.
Embodiment
Below with reference to accompanying drawings exemplary embodiment of the present disclosure is described in more detail.Although show exemplary embodiment of the present disclosure in accompanying drawing, however should be appreciated that can realize the disclosure in a variety of manners and not should limit by the embodiment set forth here.On the contrary, provide these embodiments to be in order to more thoroughly the disclosure can be understood, and complete for the scope of the present disclosure can be conveyed to those skilled in the art.
In the prior art, the parameter of measurement and the circuit that will design not on a plane of reference, the isolation (also can become transmission coefficient) of what such as circulator was weighed is the first port and the second port, and what will design is the circuit of the 3rd port; In order to solve the problem, the invention provides a kind of method and the device that improve power amplifier circulator isolation, the circuit design plane of reference is shifted, for circulator isolation, first derive the isolation of circulator and the relation of the 3rd port load impedance, thus obtain isolation maximum time the requirement of the 3rd port Impedance, so just the plane of reference can be transferred to the 3rd port, again with the load of the 3rd port for target carries out designing impedance matching, now, parameter of measurement and design are on a plane of reference, and design is just very simple and convenient.Below in conjunction with accompanying drawing and embodiment, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, do not limit the present invention.
Embodiment of the method
According to embodiments of the invention, provide a kind of method improving power amplifier circulator isolation, Fig. 1 is the flow chart of the method for the raising power amplifier circulator isolation of the embodiment of the present invention, as shown in Figure 1, following process is comprised according to the method for the raising power amplifier circulator isolation of the embodiment of the present invention:
Step 101, calculates the relation of the load impedance of the first port of circulator and the isolation of the second port and the 3rd port, the load impedance requirement of the 3rd port when determining that isolation is maximum;
In a step 101, the relation calculating the load impedance of the first port of circulator and the isolation of the second port and the 3rd port specifically comprises:
The relation of the load impedance of the first port of circulator and the isolation of the second port and the 3rd port is calculated according to formula 1:
formula 1;
Wherein, S
instead=S
12, be the transmission coefficient of the second port to the first port, b
1for the equivalent plane of reference, the reflection power that the first port receives, a
2for the equivalent plane of reference, the reflection power of the second port, S
33be the reflection coefficient of the 3rd port, S
32be the transmission coefficient of the second port to the 3rd port, S
13be the transmission coefficient of the 3rd port to the first port, Γ is the impedance reflection coefficient of circulator the 3rd port.
In a step 101, when determining that isolation is maximum, the load impedance of the 3rd port requires specifically to comprise:
When determining that isolation is maximum according to formula 2, formula 3 and formula 4, the load impedance of the 3rd port requires:
formula 2;
Step 102, requires the designing impedance matching of carrying out circulator according to the load impedance of the 3rd port.
Step 102 specifically comprises: the designing impedance matching of carrying out circulator after the source impedance of circulator being arranged to the conjugation of Γ.
In embodiments of the present invention, above-mentioned circulator specifically comprises: arrowband circulator and broad-band circulator.
Below in conjunction with accompanying drawing, the technique scheme of the embodiment of the present invention is described in detail.
In embodiments of the present invention, circulator is regarded as a three-port network; The schematic diagram of the impedance reflection coefficient of circulator the 3rd port to be Γ, Fig. 2 the be circulator equivalent network of the embodiment of the present invention, as shown in Figure 2, according to signal flow graph, the as follows of isolation and isolation end load impedance can be derived:
Make the maximum and S of isolation
instead=0, now can derive:
formula 2;
Obtain the requirement of isolation end load reflection coefficient when maximum isolation is spent, above-mentioned S12, S33, S13, S32 etc. are the intrinsic known parameters of circulator, can be obtained by means such as measurements.
Fig. 3 is circulator simulating schematic diagram and the simulation result schematic diagram of the embodiment of the present invention, as shown in Figure 3, can be verified by simulation software to above-mentioned theory derivation, imports the actual measurement parameter of a circulator of actual measurement, can obtain result by emulation.Impedance checking schematic diagram when Fig. 4 is isolation the best of the embodiment of the present invention, with this impedance as load, simulating, verifying isolation as shown in Figure 4, when can find out that isolation end adds this impedance, isolation is increased to 300dB from original dB more than 20, proves the correctness of above-mentioned derivation formula.After obtaining formula above, can carry out Circuit Matching design for Γ, now the plane of reference moves on to circuit design face, and Fig. 5 is the schematic diagram of the circuit design embodiment plane of reference of the embodiment of the present invention, as shown in Figure 5, next conventional designing impedance matching can just be carried out.
Fig. 6 is the schematic diagram that the source impedance of the designing impedance matching of the embodiment of the present invention is arranged, and as shown in Figure 6, reflection coefficient is designed to corresponding Γ, as long as source impedance is arranged to its conjugation, carry out conventional designing impedance matching.
Fig. 7 is the arrowband matching principle schematic diagram of the embodiment of the present invention, Fig. 8 is the arrowband matching result schematic diagram of the embodiment of the present invention, as shown in Figure 7 and Figure 8, by above-mentioned thinking, arrowband isolation design is carried out to circulator, first carry out designing impedance matching, this example optimal 1867MHz frequency is to smith figure center.
Fig. 9 is the arrowband isolation checking principle schematic of the embodiment of the present invention, Figure 10 is the schematic diagram of the arrowband the result of the embodiment of the present invention, as shown in Figure 9 and Figure 10, the checking emulation of the isolation of corresponding circulator, simulation result display isolation is significantly improved, can see after being impedance-matched to 1856Mhz point, the isolation of this point that circulator is corresponding is optimized.
It should be noted that, being suitable for but being not limited to above-mentioned frequency range of the embodiment of the present invention, all general to all frequency range designs.
Equally, inventive embodiments is also applicable to carry out broadband isolation design to circulator.Figure 11 is the Broadband Matching design diagram of the embodiment of the present invention, as shown in figure 11, and advanced line width band designing impedance matching, by current reflection coefficient situation, Broadband Matching be carried out, by design circuit, current reflectivity curve can be drawn in, intersect, can be mated preferably like this.
In embodiments of the present invention, can by simple and to go here and there microstrip line be realize, Figure 12 is the Broadband Matching principle schematic of the embodiment of the present invention, Figure 13 is the schematic diagram one of Broadband Matching result of the invention process, as shown in Figure 12 and Figure 13, other broadband matching circuit also can be designed by filter theory.
Figure 14 is the schematic diagram two of the Broadband Matching result of the embodiment of the present invention, as shown in figure 14, circulator isolation checking situation, wherein line is the isolation after optimizing, another line be before 50 Europe load time isolation: the isolation of the circulator after optimization had a distinct increment than in the past.
In the embodiment of the present invention, the load implementation method realizing improving power amplifier circulator isolation has a lot, comprises L inductance coupling, electric capacity coupling, LC coupling, microstrip line coupling, micro-band mates with inductance, micro-band mates with electric capacity, micro-band mates with LC.And the present invention can be used for the raising of the isolation realizing broadband and arrowband circulator.
In sum, by means of the technical scheme of the embodiment of the present invention, by the relation of the isolation and the 3rd port load impedance of first deriving circulator, thus obtain isolation maximum time the requirement of the 3rd port Impedance, the 3rd port is transferred to reference to face, again with the load of the 3rd port for target carries out designing impedance matching, simple method for designing can be used to attempt when solving radio circuit design in prior art, the problem designed cannot be carried out intuitively, can adjusting and optimizing power amplifier index, improve base station performance.
Device embodiment
According to embodiments of the invention, provide a kind of device improving power amplifier circulator isolation, Figure 15 is the structural representation of the device of the raising power amplifier circulator isolation of the embodiment of the present invention, as shown in figure 15, device according to the raising power amplifier circulator isolation of the embodiment of the present invention comprises: computing module 150 and processing module 152, be described in detail the modules of the embodiment of the present invention below.
Computing module 150, for the relation of the isolation of the first port and the second port that calculates circulator and the load impedance of the 3rd port, the load impedance requirement of the 3rd port when determining that isolation is maximum; Computing module 150 specifically for:
The relation of the load impedance of the first port of circulator and the isolation of the second port and the 3rd port is calculated according to formula 1:
formula 1;
Wherein, S
instead=S
12, be the transmission coefficient of the second port to the first port, b
1be the reflection power that the first port receives, a
2be the reflection power of the second port, S
33be the reflection coefficient of the 3rd port, S
32be the transmission coefficient of the second port to the 3rd port, S
13be the transmission coefficient of the 3rd port to the first port, Γ is the impedance reflection coefficient of circulator the 3rd port.
When determining that isolation is maximum according to formula 2, formula 3 and formula 4, the load impedance of the 3rd port requires:
formula 2;
Processing module 152, for requiring the designing impedance matching of carrying out circulator according to the load impedance of the 3rd port.Processing module 152 specifically for:
The designing impedance matching of circulator is carried out after the source impedance of circulator being arranged to the conjugation of Γ.
In embodiments of the present invention, above-mentioned circulator specifically comprises: arrowband circulator and broad-band circulator.
In the embodiment of the present invention, the concrete process of modules can be understood with reference to the description in said method embodiment, does not repeat them here.
In sum, by means of the technical scheme of the embodiment of the present invention, by the relation of the isolation and the 3rd port load impedance of first deriving circulator, thus obtain isolation maximum time the requirement of the 3rd port Impedance, the 3rd port is transferred to reference to face, again with the load of the 3rd port for target carries out designing impedance matching, simple method for designing can be used to attempt when solving radio circuit design in prior art, the problem designed cannot be carried out intuitively, can adjusting and optimizing power amplifier index, improve base station performance.
Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Intrinsic not relevant to any certain computer, virtual system or miscellaneous equipment with display at this algorithm provided.Various general-purpose system also can with use based on together with this teaching.According to description above, the structure constructed required by this type systematic is apparent.In addition, the present invention is not also for any certain programmed language.It should be understood that and various programming language can be utilized to realize content of the present invention described here, and the description done language-specific is above to disclose preferred forms of the present invention.
In specification provided herein, describe a large amount of detail.But can understand, embodiments of the invention can be put into practice when not having these details.In some instances, be not shown specifically known method, structure and technology, so that not fuzzy understanding of this description.
Similarly, be to be understood that, in order to simplify the disclosure and to help to understand in each inventive aspect one or more, in the description above to exemplary embodiment of the present invention, each feature of the present invention is grouped together in single embodiment, figure or the description to it sometimes.But, the method for the disclosure should be construed to the following intention of reflection: namely the present invention for required protection requires feature more more than the feature clearly recorded in each claim.Or rather, as claims below reflect, all features of disclosed single embodiment before inventive aspect is to be less than.Therefore, the claims following embodiment are incorporated to this embodiment thus clearly, and wherein each claim itself is as independent embodiment of the present invention.
Those skilled in the art are appreciated that and adaptively can change the module in the client in embodiment and they are arranged in one or more clients different from this embodiment.Block combiner in embodiment can be become a module, and multiple submodule or subelement or sub-component can be put them in addition.Except at least some in such feature and/or process or unit be mutually repel except, any combination can be adopted to combine all processes of all features disclosed in this specification (comprising adjoint claim, summary and accompanying drawing) and so disclosed any method or client or unit.Unless expressly stated otherwise, each feature disclosed in this specification (comprising adjoint claim, summary and accompanying drawing) can by providing identical, alternative features that is equivalent or similar object replaces.
In addition, those skilled in the art can understand, although embodiments more described herein to comprise in other embodiment some included feature instead of further feature, the combination of the feature of different embodiment means and to be within scope of the present invention and to form different embodiments.Such as, in the following claims, the one of any of embodiment required for protection can use with arbitrary compound mode.
All parts embodiment of the present invention with hardware implementing, or can realize with the software module run on one or more processor, or realizes with their combination.It will be understood by those of skill in the art that the some or all functions of some or all parts be loaded with in the client of sequence network address that microprocessor or digital signal processor (DSP) can be used in practice to realize according to the embodiment of the present invention.The present invention can also be embodied as part or all equipment for performing method as described herein or device program (such as, computer program and computer program).Realizing program of the present invention and can store on a computer-readable medium like this, or the form of one or more signal can be had.Such signal can be downloaded from internet website and obtain, or provides on carrier signal, or provides with any other form.
The present invention will be described instead of limit the invention to it should be noted above-described embodiment, and those skilled in the art can design alternative embodiment when not departing from the scope of claims.In the claims, any reference symbol between bracket should be configured to limitations on claims.Word " comprises " not to be got rid of existence and does not arrange element in the claims or step.Word "a" or "an" before being positioned at element is not got rid of and be there is multiple such element.The present invention can by means of including the hardware of some different elements and realizing by means of the computer of suitably programming.In the unit claim listing some devices, several in these devices can be carry out imbody by same hardware branch.Word first, second and third-class use do not represent any order.Can be title by these word explanations.
Claims (10)
1. improve a method for power amplifier circulator isolation, it is characterized in that, comprising:
Calculate the relation of the load impedance of the first port of circulator and the isolation of the second port and the 3rd port, the load impedance requirement of the 3rd port described in when determining that described isolation is maximum;
The designing impedance matching of carrying out described circulator is required according to the load impedance of described 3rd port.
2. the method for claim 1, is characterized in that, the relation calculating the load impedance of the first port of circulator and the isolation of the second port and the 3rd port specifically comprises:
The relation of the load impedance of the first port of circulator and the isolation of the second port and the 3rd port is calculated according to formula 1:
formula 1;
Wherein, S
instead=S
12, be the transmission coefficient of the second port to the first port, b
1be the reflection power that the first port receives, a
2be the reflection power of the second port, S
33be the reflection coefficient of the 3rd port, S
32be the transmission coefficient of the second port to the 3rd port, S
13be the transmission coefficient of the 3rd port to the first port, Γ is the impedance reflection coefficient of described circulator the 3rd port.
3. method as claimed in claim 2, it is characterized in that, described in when determining that described isolation is maximum, the load impedance of the 3rd port requires specifically to comprise:
Described in when determining that described isolation is maximum according to formula 2, formula 3 and formula 4, the load impedance of the 3rd port requires:
formula 2;
4. method as claimed in claim 3, is characterized in that, requires that the designing impedance matching of carrying out described circulator specifically comprises according to the load impedance of described 3rd port:
The designing impedance matching of described circulator is carried out after the source impedance of described circulator being arranged to the conjugation of Γ.
5. the method according to any one of Claims 1-4, is characterized in that, described circulator specifically comprises: arrowband circulator and broad-band circulator.
6. improve a device for power amplifier circulator isolation, it is characterized in that, comprising:
Computing module, for the relation of the isolation of the first port and the second port that calculates circulator and the load impedance of the 3rd port, the load impedance requirement of the 3rd port described in when determining that described isolation is maximum;
Processing module, for requiring the designing impedance matching of carrying out described circulator according to the load impedance of described 3rd port.
7. device as claimed in claim 6, is characterized in that, described computing module specifically for:
The relation of the load impedance of the first port of circulator and the isolation of the second port and the 3rd port is calculated according to formula 1:
formula 1;
Wherein, S
instead=S
12, be the transmission coefficient of the second port to the first port, b
1be the reflection power that the first port receives, a
2be the reflection power of the second port, S
33be the reflection coefficient of the 3rd port, S
32be the transmission coefficient of the second port to the 3rd port, S
13be the transmission coefficient of the 3rd port to the first port, Γ is the impedance reflection coefficient of described circulator the 3rd port.
8. device as claimed in claim 7, is characterized in that, described computing module specifically for:
Described in when determining that described isolation is maximum according to formula 2, formula 3 and formula 4, the load impedance of the 3rd port requires:
formula 2;
9. device as claimed in claim 8, is characterized in that, described processing module specifically for:
The designing impedance matching of described circulator is carried out after the source impedance of described circulator being arranged to the conjugation of Γ.
10. the device according to any one of claim 6 to 9, is characterized in that, described circulator specifically comprises: arrowband circulator and broad-band circulator.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410531083.7A CN105490644A (en) | 2014-10-10 | 2014-10-10 | Method and device for improving insulation of circulator of power amplifier |
| PCT/CN2014/095184 WO2015131636A1 (en) | 2014-10-10 | 2014-12-26 | Method and device for improving isolation of circulator of power amplifier |
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|---|---|---|---|
| CN201410531083.7A CN105490644A (en) | 2014-10-10 | 2014-10-10 | Method and device for improving insulation of circulator of power amplifier |
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| CN1956257A (en) * | 2005-10-25 | 2007-05-02 | 中国科学院上海微系统与信息技术研究所 | Mixed circulator of high transmit-receive isolation degree |
| CN101834329A (en) * | 2010-05-13 | 2010-09-15 | 西安俊采电子科技有限公司 | Miniature isolator |
| US7834719B2 (en) * | 2008-05-31 | 2010-11-16 | Applied Radar Inc | Lange-ferrite circulator for simultaneous transmit and receive (STAR) with high isolation and noise suppression |
| EP2784936A1 (en) * | 2011-12-30 | 2014-10-01 | ZTE Corporation | Circulator power amplifier circuit and design method therefor |
-
2014
- 2014-10-10 CN CN201410531083.7A patent/CN105490644A/en active Pending
- 2014-12-26 WO PCT/CN2014/095184 patent/WO2015131636A1/en active Application Filing
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| US4442416A (en) * | 1981-12-31 | 1984-04-10 | Motorola, Inc. | Variable impedance synthesis apparatus |
| US20040207426A1 (en) * | 2003-04-21 | 2004-10-21 | Christos Tsironis | Active prematching tuner system |
| CN1492606A (en) * | 2003-09-28 | 2004-04-28 | 中兴通讯股份有限公司 | High power linear transmitting-receiving switch circuit |
| CN1956257A (en) * | 2005-10-25 | 2007-05-02 | 中国科学院上海微系统与信息技术研究所 | Mixed circulator of high transmit-receive isolation degree |
| US7834719B2 (en) * | 2008-05-31 | 2010-11-16 | Applied Radar Inc | Lange-ferrite circulator for simultaneous transmit and receive (STAR) with high isolation and noise suppression |
| CN101834329A (en) * | 2010-05-13 | 2010-09-15 | 西安俊采电子科技有限公司 | Miniature isolator |
| EP2784936A1 (en) * | 2011-12-30 | 2014-10-01 | ZTE Corporation | Circulator power amplifier circuit and design method therefor |
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| WO2015131636A1 (en) | 2015-09-11 |
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