CN103338019A - A balun circuit - Google Patents
A balun circuit Download PDFInfo
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- CN103338019A CN103338019A CN2013102190468A CN201310219046A CN103338019A CN 103338019 A CN103338019 A CN 103338019A CN 2013102190468 A CN2013102190468 A CN 2013102190468A CN 201310219046 A CN201310219046 A CN 201310219046A CN 103338019 A CN103338019 A CN 103338019A
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Abstract
The embodiment of the invention provides a balun circuit. The balun circuit comprises a first set of quarter wavelength balanced transmission lines, a second set of quarter wavelength balanced transmission lines, and a double layer four-line coupling compensation transmission line. The first set of quarter wavelength balanced transmission lines comprises a first quarter-wave transmission line and a second quarter-wave transmission line. The second set of quarter wavelength balanced transmission lines comprises a third quarter-wave transmission line and a fourth quarter-wave transmission line. The first set of quarter wavelength balanced transmission lines is connected to the second set of quarter wavelength balanced transmission lines through the double layer four-line coupling compensation transmission line, so that single-end signals are input though the quarter wavelength transmission line; double end differential signals are output through the double layer four-line coupling compensation transmission line; high even mode characteristic impedance and low odd mode characteristic impedance can be realized; The ratio of the high even mode characteristic impedance and the low odd mode characteristic impedance are increased; and the balance performance is effectively improved.
Description
Technical field
The present invention relates to communication technical field, especially relate to a kind of balun circuit.
Background technology
Balun circuit (Balun) is called balanced-to-unblanced transformer again, has widely to use in communication system.Current microwave/millimeter wave Point-to-Point Communication System need cover multiple frequency band and standard, also needs to realize high rate data transmission.Correspondingly, balun circuit also is faced with miniaturization and high performance design challenge.
The balance of the integrated balun circuit of existing chip is relatively poor, causes performance low.Therefore, can't satisfy ultra broadband point-to-point communication standard-required.
Summary of the invention
Embodiments of the invention provide a kind of balun circuit, can realize high even modular character impedance and low strange modular character impedance, effectively improve balance.
On the one hand, a kind of balun circuit is provided, comprise: first group of quarter-wave balanced transmission line, second group of quarter-wave balanced transmission line and double-layer four-line compensating for coupling transmission line, described first group of quarter-wave balanced transmission line comprises first quarter-wave transmission line and second quarter-wave transmission line, and described second group of quarter-wave balanced transmission line comprises the 3rd quarter-wave transmission line and the 4th quarter-wave transmission line; One end of first transmission line in one end of described first quarter-wave transmission line and the described double-layer four-line compensating for coupling transmission line is connected; One end of second transmission line in one end of described second quarter-wave transmission line and the described double-layer four-line compensating for coupling transmission line is connected; One end of the 3rd transmission line in one end of described the 3rd quarter-wave transmission line and the described double-layer four-line compensating for coupling transmission line is connected; And an end of the 4th transmission line in an end of described the 4th quarter-wave transmission line and the described double-layer four-line compensating for coupling transmission line is connected; The equal ground connection of the other end of the other end of described first quarter-wave transmission line and described the 4th quarter-wave transmission line, the other end of described second transmission line is connected with the other end of described the 3rd transmission line, the other end of described second quarter-wave transmission line is the single-ended signal input port, and the other end of described first transmission line in the described double-layer four-line compensating for coupling transmission line and the other end of described the 4th transmission line are both-end differential signal output port.
In a kind of possible implementation, described balun circuit adopts complementary metal oxide semiconductors (CMOS) CMOS or bipolar complementary metal oxide semiconductor BiCMOS manufacturing process or GaAs and benzocyclobutene BCB integrated process.
In conjunction with any implementation in the above-mentioned implementation, in another kind of implementation, when described balun circuit adopted CMOS or BiCMOS manufacturing process, described double-layer four-line compensating for coupling transmission line was positioned at least two metal levels of described CMOS or described BiCMOS manufacturing process; Described second transmission line in the described double-layer four-line compensating for coupling transmission line and described the 3rd transmission line all are arranged in the first metal layer of described at least two metal levels; And described first transmission line in the described double-layer four-line compensating for coupling transmission line and described the 4th transmission line all are arranged in second metal level of described at least two metal levels.
In conjunction with any implementation in the above-mentioned implementation, in another kind of implementation, described first quarter-wave transmission line and described the 4th quarter-wave transmission line be positioned at described the first metal layer, and described second quarter-wave transmission line and described the 3rd quarter-wave transmission line all are positioned at described second metal level.
In conjunction with any implementation in the above-mentioned implementation, in another kind of implementation, when described balun circuit adopted CMOS technology or BiCMOS technology, described the first metal layer was the MA layer, and described second metal level is the E1 layer.
In conjunction with any implementation in the above-mentioned implementation, in another kind of implementation, described first group of quarter-wave transmission line comprises first screen, and described first screen is positioned at the below of described first group of quarter-wave transmission line, and described first shielding layer grounding; Described second group of quarter-wave transmission line comprises the secondary shielding layer, and described secondary shielding layer is positioned at the below of described second group of quarter-wave transmission line, and described secondary shielding layer ground connection.
In conjunction with any implementation in the above-mentioned implementation, in another kind of implementation, described first screen and described secondary shielding layer are floating shape screen.
In conjunction with any implementation in the above-mentioned implementation, in another kind of implementation, described floating shape screen has centre cap, and described floating shape screen is by described centre cap ground connection.
In conjunction with any implementation in the above-mentioned implementation, in another kind of implementation, described first group of quarter-wave balanced transmission line and described second group of quarter-wave balanced transmission line are the spirality stacked structures
In conjunction with any implementation in the above-mentioned implementation, in another kind of implementation, described first group of quarter-wave balanced transmission line and described second group of quarter-wave balanced transmission line are spirality with layer structure.
The balun circuit that embodiments of the invention provide comprises first group of quarter-wave balanced transmission line, second group of quarter-wave balanced transmission line and double-layer four-line compensating for coupling transmission line.Be connected by double-layer four-line compensating for coupling transmission line between first group of quarter-wave balanced transmission line and second group of quarter-wave balanced transmission line.Therefore, by the input of quarter-wave transmission line single-ended signal, in the output of double-layer four-line compensating for coupling transmission line both-end differential signal, can realize high even modular character impedance and low strange modular character impedance, make even modular character impedance and the ratio of strange modular character impedance increase, improve balance effectively.
Description of drawings
In order to be illustrated more clearly in the technical scheme of the embodiment of the invention, to do to introduce simply to the accompanying drawing of required use in the embodiment of the invention below, apparently, below described accompanying drawing only be some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Shown in Figure 1 is the structural representation block diagram of a kind of balun circuit of providing of the embodiment of the invention.
Shown in Figure 2 is the structural representation block diagram of the balun circuit of one embodiment of the invention.
Fig. 3 is the schematic diagram of coupled characteristic of the balun circuit of one embodiment of the invention.
Fig. 4 is the schematic diagram of non-equilibrium property of the balun circuit of one embodiment of the invention.
Fig. 5 is the schematic diagram of the balun circuit manufacturing process of one embodiment of the invention.
Fig. 6 is the schematic part-structure figure of the balun circuit manufacturing process of one embodiment of the invention.
Fig. 7 is the position view of double-layer four-line compensating for coupling transmission line in the balun circuit manufacturing process of one embodiment of the invention.
Fig. 8 is the position view of quarter-wave balanced transmission line in the balun circuit manufacturing process of one embodiment of the invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly described, obviously, described embodiment is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that obtains under the creative work prerequisite.
At first need to prove, on the broad sense, the essence of balun circuit is that a unbalanced input is divided into two outputs that constant amplitude is reverse, in numerous balun circuit structures, the Marchand balun circuit is a kind of balun circuit that is most widely used, the Marchand balun circuit is developed by coaxial balun circuit, generally comprise three parts: a balance ports, a pair of unbalanced difference port and an end coupling circuit, according to Marchand balun circuit theory, in the structure of Marchand balun circuit, need satisfy following condition to obtain suitable balun circuit structure:
Here, k is coupling coefficient, and θ is the electrical length of balanced transmission line,
Be the element in the S parameter matrix of Marchand balun circuit, specifically can referring in the prior art about the argumentation of Marchand theory, repeat no more herein, thus, the Marchand balun circuit is counted as the combination of phase shifter A and phase shifter B as can be known.
Shown in Figure 1 is the structural representation block diagram of a kind of balun circuit of providing of the embodiment of the invention.
As shown in Figure 1, balun circuit 100 comprises two groups of quarter-wave balanced transmission lines, is respectively first group of quarter-wave balanced transmission line 101 and second group of quarter-wave balanced transmission line 102, and double-layer four-line compensating for coupling transmission line 103.First group of quarter-wave balanced transmission line 101 comprises first quarter-wave transmission line 111 and second quarter-wave transmission line 112; Second group of quarter-wave balanced transmission line 102 comprises the 3rd quarter-wave transmission line 121 and the 4th quarter-wave transmission line 122.
One end of first transmission line 131 in one end of first quarter-wave transmission line 111 and the double-layer four-line compensating for coupling transmission line 103 is connected; One end of second transmission line 132 in one end of second quarter-wave transmission line 112 and the double-layer four-line compensating for coupling transmission line 103 is connected; One end of the 3rd transmission line 133 in one end of the 3rd quarter-wave transmission line 121 and the described double-layer four-line compensating for coupling transmission line 103 is connected; One end of the 4th transmission line 134 in one end of the 4th quarter-wave transmission line 122 and the double-layer four-line compensating for coupling transmission line 103 is connected.
The equal ground connection of the other end of the other end of first quarter-wave transmission line 112 and the 4th quarter-wave transmission line 122, the other end of second transmission line 132 is connected with the other end of described the 3rd transmission line 133, the other end of second quarter-wave transmission line 112 is the single-ended signal input port, and the other end of first transmission line 131 in the double-layer four-line compensating for coupling transmission line 103 and the other end of the 4th transmission line 134 are both-end differential signal output port.
Should understand, the embodiment of the invention is comparatively speaking to balun circuit as the single-ended signal input of three port devices and the description of both-end differential signal output, for example, also can be that the other end of the 3rd quarter-wave transmission line 121 is as the single-ended signal input port.Should be understood that the embodiment of the invention does not limit this, any conception based on the embodiment of the invention, the balun circuit device that simply replace, operation such as reciprocity obtains all belongs within protection scope of the present invention.
The balun circuit that embodiments of the invention provide comprises first group of quarter-wave balanced transmission line, second group of quarter-wave balanced transmission line and double-layer four-line compensating for coupling transmission line.Be connected by double-layer four-line compensating for coupling transmission line between first group of quarter-wave balanced transmission line and second group of quarter-wave balanced transmission line.Import by the quarter-wave transmission line single-ended signal, export at double-layer four-line compensating for coupling transmission line both-end differential signal, can realize high even modular character impedance and low strange modular character impedance, make even modular character impedance and the ratio of strange modular character impedance increase, improve balance effectively.
Alternatively, schematically as shown in Figure 2, first group of quarter-wave balanced transmission line 101 and second group of quarter-wave balanced transmission line 102 all can be quarter-wave spirality stack balanced transmission line.The quarter-wave balanced transmission line adopts the spirality stacked structures can realize high coupling coefficient (Coupling Coefficient), obtain broadside coupled (Tight Coupling) characteristic, namely relative bandwidth (Fraction Bandwidth) is greater than 1(100%).Need to prove, in Fig. 2, cross spider in the described double-layer four-line compensating for coupling transmission line 103 between adjacent two transmission lines is represented the relation for intercoupling and transmitting between this two transmission lines, for example: the cross spider between first transmission line 131 and second transmission line 132 namely represents to be between first transmission line 131 and second transmission line 132 coupled relation, other similarly, further, for the cross spider in first group of quarter-wave balanced transmission line 101 shown in Figure 2 and the second group of quarter-wave balanced transmission line 102, same expression coupled relation, those skilled in the art can understand technical scheme of the present invention with reference to the accompanying drawings, give unnecessary details no longer one by one herein.
As shown in Figure 3, obtain when satisfying the shake index and be 0.5dB, 1.0dB, 1.5dB and 2.0dB, can realizing that relative bandwidth is greater than 1 by training.Under the prerequisite of shake index, coupling coefficient is more big in satisfying band, and relative bandwidth is more big, therefore, can satisfy the requirement of super bandwidth point point to-point communication standard.
In addition, the quarter-wave balanced transmission line adopts the spirality stacked structures can reduce the area of balun circuit, for example, can realize that the entire circuit area of balun circuit is 265um * 115um, satisfy the designing requirement of Point-to-Point Communication System mini-bus human relations circuit miniaturization.
Should be understood that the embodiment of the invention is not limited to this, the quarter-wave balanced transmission line also can adopt other structure, as a spirality layer structure together.
According to the Marchand theory, the output of both-end differential signal can characterize with following formula:
Wherein, Z
OeBe the impedance of equivalence idol modular character, Z
OoBe the strange modular character impedance of equivalence, as can be known, in order to improve the balance of balun circuit, then need make Z
OeAs far as possible greater than Z
Oo, so that S
31/ S
21Ratio near 1.
Based on this, alternatively, the balun circuit in the present embodiment can also comprise screen.Particularly, comprise first screen and secondary shielding layer, first screen is positioned at the below of first group of quarter-wave transmission line 101, and first shielding layer grounding; The secondary shielding layer is positioned at the below of second group of quarter-wave transmission line 102, and secondary shielding layer ground connection.Alternatively, first screen and secondary shielding layer can be floating shape screen, and further, floating shape screen has centre cap, and floating shape screen is by centre cap ground connection.Should be understood that the embodiment of the invention does not limit the pattern of screen.
Particularly, under first group of quarter-wave balanced transmission line 101 and second group of quarter-wave balanced transmission line 102, all has floating shape screen, and floating shape screen has centre cap, and floating shape screen links to each other with chip ground by this centre cap.Therefore, can reduce balanced transmission line to the longitudinal electric field effect on chip medium ground, obtain low strange modular character impedance, shown in (a) among Fig. 4, adopt screen, when frequency during about 15-45GHz, realized that all the non-equilibrium property of amplitude of difference output in the band is in the interval of [1dB, 1dB].‘
Shown in (b) among Fig. 4, w
cThe live width of expression double-layer four-line compensating for coupling transmission line, g
cExpression double-layer four-line compensating for coupling transmission line is with the spacing between layer two-wire, l
cBe the line length of four line compensating for coupling transmission lines, l is the line length of first group or second group quarter-wave balanced transmission line.Obtain by training: at w
c/ g
c=2, work as l
c/ l has realized that approximately more than or equal to 8% o'clock the non-equilibrium property of phase place of difference output in the band is less than 1.13 °.
Therefore, the present invention can reduce the non-equilibrium property of amplitude and the non-equilibrium property of phase place simultaneously, thereby improves balance effectively.
Alternatively, balun circuit can adopt complementary metal oxide semiconductors (CMOS) (Complementary Metal Oxide Semiconductor, CMOS) or bipolar complementary metal oxide semiconductor (Bipolar Complementary Metal Oxide Semiconductor, BiCMOS) manufacturing process, balun circuit also can adopt GaAs and BCB(Benzocyclobutene, BCB) integrated process, etc.Should be understood that the embodiment of the invention does not limit the manufacturing process of balun circuit.Alternatively, when balun circuit adopted CMOS or BiCMOS manufacturing process, double-layer four-line compensating for coupling transmission line 103 was positioned at least two metal levels of CMOS or BiCMOS manufacturing process.Second transmission line 132 in the double-layer four-line compensating for coupling transmission line 103 and the 3rd transmission line 133 all are arranged in the first metal layer of at least two metal levels; And first transmission line 131 in the double-layer four-line compensating for coupling transmission line 103 and the 4th transmission line 134 all are arranged in second metal level of at least two metal levels.Further, first quarter-wave transmission line 111 and the 4th quarter-wave transmission line 122 all are positioned at the first metal layer, and second quarter-wave transmission line 112 and the 3rd quarter-wave transmission line 121 all are positioned at the second layer metal layer.
Preferably, balun circuit adopts CMOS or BiCMOS manufacturing process, as shown in Figure 5.Correspondingly, Fig. 6 schematically shows the structure chart of various piece among Fig. 5, is that the second metal level E1 layer, (c) are that the 3rd metal level LY layer, (d) are that the 4th metal level MQ layer, (e) are the 5th metal level M2 layer and (f) are bottom metal layer M1 layer for the first metal layer MA layer (being also referred to as " top layer metallic layer "), (b) (a).
Particularly, double-deck compensating for coupling transmission line 103 can be positioned at the first metal layer MA layer and the second metal level E1 layer of CMOS or BiCMOS manufacturing process.
For example, second transmission line 132 and the 3rd transmission line 133 in the double-layer four-line compensating for coupling transmission line 103 all are positioned at the first metal layer MA layer, alternatively, first quarter-wave transmission line 111 and the 4th quarter-wave transmission line 122 also all are positioned at the first metal layer MA layer, as shown in Figure 7.And first transmission line 131 in the double-layer four-line compensating for coupling transmission line 103 and the 4th transmission line 134 all are positioned at the first metal layer MA layer, alternatively, second quarter-wave transmission line 112 and the 3rd quarter-wave transmission line 121 also all are positioned at the second metal level E1 layer.As shown in Figure 8.
Should be understood that the embodiment of the invention does not limit which or which metal level that double-layer four-line compensating for coupling transmission line is positioned at manufacturing process.
Those of ordinary skills can recognize, unit and the algorithm steps of each example of describing in conjunction with embodiment disclosed herein can be realized with the combination of electronic hardware or computer software and electronic hardware.These functions still are that software mode is carried out with hardware actually, depend on application-specific and the design constraint of technical scheme.The professional and technical personnel can specifically should be used for using distinct methods to realize described function to each, but this realization should not thought and exceeds scope of the present invention.
The those skilled in the art can be well understood to, and is the convenience described and succinct, and the concrete course of work of the system of foregoing description, device and unit can not repeat them here with reference to the corresponding process among the preceding method embodiment.
In several embodiment that the application provides, should be understood that disclosed balun circuit can be realized by other mode.For example, device embodiment described above only is schematic, for example, the division of described unit, only be that a kind of logic function is divided, during actual the realization other dividing mode can be arranged, for example a plurality of unit or assembly can in conjunction with or can be integrated into another system, or some features can ignore, or do not carry out.Another point, the shown or coupling each other discussed or directly to be coupled or to communicate to connect can be by some interfaces, the indirect coupling of device or unit or communicate to connect can be electrically, machinery or other form.
Described unit as separating component explanation can or can not be physically to separate also, and the parts that show as the unit can be or can not be physical locations also, namely can be positioned at a place, perhaps also can be distributed on a plurality of network element.Can select wherein some or all of unit to realize the purpose of present embodiment scheme according to the actual needs.
In addition, each functional unit in each embodiment of the present invention can be integrated in the processing unit, also can be that the independent physics in each unit exists, and also can be integrated in the unit two or more unit.
If described function realizes with the form of SFU software functional unit and during as independently production marketing or use, can be stored in the computer read/write memory medium.Based on such understanding, the part that technical scheme of the present invention contributes to prior art in essence in other words or the part of this technical scheme can embody with the form of software product, this computer software product is stored in the storage medium, comprise that some instructions are with so that a computer equipment (can be personal computer, server, the perhaps network equipment etc.) carry out all or part of step of the described method of each embodiment of the present invention.And aforesaid storage medium comprises: various media that can be program code stored such as USB flash disk, portable hard drive, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disc or CD.
The above; only be the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; can expect easily changing or replacing, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.
Claims (10)
1. balun circuit, it is characterized in that, comprise: first group of quarter-wave balanced transmission line, second group of quarter-wave balanced transmission line and double-layer four-line compensating for coupling transmission line, described first group of quarter-wave balanced transmission line comprises first quarter-wave transmission line and second quarter-wave transmission line, and described second group of quarter-wave balanced transmission line comprises the 3rd quarter-wave transmission line and the 4th quarter-wave transmission line;
One end of first transmission line in one end of described first quarter-wave transmission line and the described double-layer four-line compensating for coupling transmission line is connected;
One end of second transmission line in one end of described second quarter-wave transmission line and the described double-layer four-line compensating for coupling transmission line is connected;
One end of the 3rd transmission line in one end of described the 3rd quarter-wave transmission line and the described double-layer four-line compensating for coupling transmission line is connected; And
One end of the 4th transmission line in one end of described the 4th quarter-wave transmission line and the described double-layer four-line compensating for coupling transmission line is connected;
The equal ground connection of the other end of the other end of described first quarter-wave transmission line and described the 4th quarter-wave transmission line, the other end of described second transmission line is connected with the other end of described the 3rd transmission line, the other end of described second quarter-wave transmission line is the single-ended signal input port, and the other end of described first transmission line in the described double-layer four-line compensating for coupling transmission line and the other end of described the 4th transmission line are both-end differential signal output port.
2. balun circuit according to claim 1 is characterized in that, described balun circuit adopts complementary metal oxide semiconductors (CMOS) CMOS technology or bipolar complementary metal oxide semiconductor BiCMOS technology or GaAs and the manufacturing of benzocyclobutene BCB technology.
3. balun circuit according to claim 2 is characterized in that, when described balun circuit adopts CMOS technology or BiCMOS technology or BCB technology to make,
Under described CMOS technology or described BiCMOS technology or described BCB technology, described double-layer four-line compensating for coupling transmission line is positioned at least two metal levels;
Wherein, described second transmission line and described the 3rd transmission line all are arranged in the first metal layer of described at least two metal levels; And
Described first transmission line and described the 4th transmission line all are arranged in second metal level of described at least two metal levels.
4. balun circuit according to claim 3 is characterized in that,
Described first quarter-wave transmission line and described the 4th quarter-wave transmission line be positioned at described the first metal layer, and described second quarter-wave transmission line and described the 3rd quarter-wave transmission line all are positioned at described second metal level.
5. according to claim 3 or 4 described balun circuits, it is characterized in that when described balun circuit adopted CMOS technology or BiCMOS technology, described the first metal layer was the MA layer, and described second metal level is the E1 layer.
6. according to each described balun circuit of claim 1-5, it is characterized in that,
Described balun circuit also comprises first screen and secondary shielding layer; Described first screen is positioned at the below of described first group of quarter-wave transmission line, and described first shielding layer grounding, to reduce described first group of quarter-wave transmission line longitudinal electric field effect over the ground;
Described secondary shielding layer is positioned at the below of described second group of quarter-wave transmission line, and described secondary shielding layer ground connection, to reduce described second group of quarter-wave transmission line longitudinal electric field effect over the ground.
7. according to right 6 described balun circuits, it is characterized in that described first screen and described secondary shielding layer are floating shape screen.
8. balun circuit according to claim 7 is characterized in that,
Described floating shape screen has centre cap, and described floating shape screen is by described centre cap ground connection.
9. according to each described balun circuit of claim 1-8, it is characterized in that described first group of quarter-wave balanced transmission line and described second group of quarter-wave balanced transmission line are the spirality stacked structures.
10. according to each described balun circuit of claim 1-8, it is characterized in that described first group of quarter-wave balanced transmission line and described second group of quarter-wave balanced transmission line are spirality with layer structure.
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| CN103595366A (en) * | 2013-10-17 | 2014-02-19 | 天津大学 | Second-order dot matrix balun of 0.6-1.2GHz CMOS |
| CN103716010A (en) * | 2013-12-30 | 2014-04-09 | 宇龙计算机通信科技(深圳)有限公司 | Balun circuit and terminal |
| CN106100602A (en) * | 2016-08-11 | 2016-11-09 | 宜确半导体（苏州）有限公司 | A kind of wideband balun impedance transformer |
| CN108768337A (en) * | 2014-08-19 | 2018-11-06 | 华为技术有限公司 | A kind of balun power amplifier |
| CN109891667A (en) * | 2016-10-27 | 2019-06-14 | 瑞典爱立信有限公司 | Balun device |
| CN110854496A (en) * | 2019-09-11 | 2020-02-28 | 西安电子科技大学 | A compact three-dimensional horse phase balun based on through-silicon vias |
| CN111029701A (en) * | 2019-12-31 | 2020-04-17 | 成都蓝大科技有限公司 | Novel branch line balun |
| WO2020088327A1 (en) * | 2018-10-31 | 2020-05-07 | 华为技术有限公司 | Balance-unbalance conversion apparatus, communication device, and communication system |
| CN113972457A (en) * | 2021-09-14 | 2022-01-25 | 北京邮电大学 | Frequency Independent Broadband Inverting Phase Shifter and Filtered All Pass Band Isolation Balun |
| WO2023216666A1 (en) * | 2022-05-09 | 2023-11-16 | 华为技术有限公司 | Balun and differential amplifier |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103595366B (en) * | 2013-10-17 | 2016-05-11 | 天津大学 | A kind of 0.6～1.2GHz CMOS second order dot matrix Ba Lun |
| CN103595366A (en) * | 2013-10-17 | 2014-02-19 | 天津大学 | Second-order dot matrix balun of 0.6-1.2GHz CMOS |
| CN103716010A (en) * | 2013-12-30 | 2014-04-09 | 宇龙计算机通信科技(深圳)有限公司 | Balun circuit and terminal |
| CN108768337A (en) * | 2014-08-19 | 2018-11-06 | 华为技术有限公司 | A kind of balun power amplifier |
| CN106100602A (en) * | 2016-08-11 | 2016-11-09 | 宜确半导体（苏州）有限公司 | A kind of wideband balun impedance transformer |
| CN109891667A (en) * | 2016-10-27 | 2019-06-14 | 瑞典爱立信有限公司 | Balun device |
| WO2020088327A1 (en) * | 2018-10-31 | 2020-05-07 | 华为技术有限公司 | Balance-unbalance conversion apparatus, communication device, and communication system |
| US11870124B2 (en) | 2018-10-31 | 2024-01-09 | Huawei Technologies Co., Ltd. | Balance-unbalance conversion apparatus, communications device, and communications system |
| CN110854496A (en) * | 2019-09-11 | 2020-02-28 | 西安电子科技大学 | A compact three-dimensional horse phase balun based on through-silicon vias |
| CN110854496B (en) * | 2019-09-11 | 2021-06-29 | 西安电子科技大学 | A compact three-dimensional horse phase balun based on through-silicon vias |
| CN111029701A (en) * | 2019-12-31 | 2020-04-17 | 成都蓝大科技有限公司 | Novel branch line balun |
| CN113972457A (en) * | 2021-09-14 | 2022-01-25 | 北京邮电大学 | Frequency Independent Broadband Inverting Phase Shifter and Filtered All Pass Band Isolation Balun |
| CN113972457B (en) * | 2021-09-14 | 2022-12-27 | 北京邮电大学 | Frequency-independent broadband phase-inverting phase shifter and filtering full-passband isolation balun |
| WO2023216666A1 (en) * | 2022-05-09 | 2023-11-16 | 华为技术有限公司 | Balun and differential amplifier |
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|---|---|
| CN103338019B (en) | 2016-09-28 |
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