CN105591183A - Anti-phase unequal power divider based on parallel coupling structure - Google Patents
Anti-phase unequal power divider based on parallel coupling structure Download PDFInfo
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- CN105591183A CN105591183A CN201610164494.6A CN201610164494A CN105591183A CN 105591183 A CN105591183 A CN 105591183A CN 201610164494 A CN201610164494 A CN 201610164494A CN 105591183 A CN105591183 A CN 105591183A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P5/00—Coupling devices of the waveguide type
- H01P5/12—Coupling devices having more than two ports
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P5/00—Coupling devices of the waveguide type
- H01P5/12—Coupling devices having more than two ports
- H01P5/16—Conjugate devices, i.e. devices having at least one port decoupled from one other port
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- Waveguide Switches, Polarizers, And Phase Shifters (AREA)
Abstract
The invention discloses an anti-phase unequal power divider based on a parallel coupling structure. The anti-phase unequal power divider includes a rectangular medium substrate of which a lower surface is provided with a metal ground plate. An upper surface of the medium substrate is provided with an input terminal feed line, a first output terminal feed line, and a second output terminal feed line. A first parallel coupling structure and a first 1/4 wavelength transmission line are arranged between the input terminal feed line and the first output terminal feed line. A second parallel coupling structure and a second 1/4 wavelength transmission line are arranged between the input terminal feed line and the second output terminal feed line. A third 1/4 wavelength transmission line, a fourth 1/4 wavelength transmission line, and a resistor are also arranged between the first output terminal feed line and the second output terminal feed line. The resistor is connected to the ground plate on the lower surface of the medium substrate through a metal through hole in the medium substrate. The anti-phase unequal power divider has simple structure, low loss, high isolation, and small phase deviation.
Description
Technical field
The present invention relates to microwave passive component technical field, particularly one possess simultaneously simple in structure, loss is low, isolationSpend the anti-phase not decile power splitter based on parallel coupling structure high, phase deviation is little.
Background technology
Power splitter, claims again power divider, is bringing into play very important effect in the feeding network of wireless communication system.In recent years, the research of power splitter is deepened continuously, especially more to the research dividing with equal merit, and to antenna array wave beamThe research of the anti-phase power splitter of not decile of figuration important role is relatively less. Not etc. merit does not divide feed can effectively suppress skyThe minor level that line is excessive, differential signal has good noise resisting ability and higher signal noise ratio. Traditional radio frequencyFront-end circuit adopts the method that decile power splitter is not combined with negative circuit, and headend equipment volume is increased, and increases simultaneouslyPower attenuation. In order to reduce the size of RF front-end circuit, industry considers to adopt anti-phase not decile power splitter.
Document 1 (J.X.Chen, Z.H.BaoandQ.Xue, " Analysisanddesignofout-of-phasepowerdividerwitharbitrarydivisionratio,"inIETMicrowaves,Antennas&Propagation,vol.4,no.9, pp.1370-1376, September2010.) in propose to utilize the microstrip line back-to-back of parallel strip line feed, thereby obtainObtain anti-phase characteristic, utilize the impedance difference of two microstrip lines, determine the power-division ratios of two output ports. This power splitter is oneDetermine in frequency range, to there is good frequency response, but its phase difference is only 180 ° at a frequency place, and its structureFor double-decker, design is comparatively complicated.
Document 2 (F.F.FanandZ.H.Yan, " Out-of-phaseunequalpowerdividerbasedonparalleldual-linesstructure,"MicrowaveandMillimeterWaveTechnology(ICMMT),2012InternationalConferenceon, Shenzhen, 2012, pp.1-3.) adopt a special parallel wire structure to realizeAn anti-phase not decile power splitter, be simple single-layer medium structure although this power splitter adopts, in literary composition notThere is the isolation that provides two output ports.
Document 3 (A.Mestezky, H.MatznerandE.Levine, " N-wayunequalpowerdividerwithbalancedexcitation,"AntennasandPropagation(EuCAP),20137thEuropeanConferenceon,Gothenburg, 2013, pp.1816-1819.) in the anti-phase not decile of a kind of multichannel based on radial wave circulation way has been proposedPower splitter, this power splitter has good merit point characteristic within the scope of certain frequency, but its size is larger, is unfavorable for mouldPiece is integrated.
In a word, prior art exist problem be: anti-phase not decile power splitter cannot take into account simple in structure, loss is low, everyThe port match characteristic high from degree, size is little and good, is unfavorable for applying in modern wireless communication systems.
Summary of the invention
The object of the present invention is to provide a kind of anti-phase not decile power splitter based on parallel coupling structure, possess structure simultaneouslyThe characteristic that simply, loss is low, isolation is high and phase deviation is little.
The technical solution that realizes the object of the invention is: a kind of anti-phase not decile power splitter based on parallel coupling structure,It comprises that lower surface is provided with the Rectangular Enclosure with Participating Media substrate of metal ground plate, is provided with input port at the upper surface of described medium substrateFeeder line, the first output port feeder line and the second output port feeder line, in described input port feeder line and the feedback of the first output portBetween line, be provided with the first parallel coupling structure and the one 1/4 wavelength transmission line, described first parallel coupling structure one end and defeatedInbound port feeder line is connected, and the other end is connected with the first output port feeder line by the one 1/4 wavelength transmission line, described defeatedBetween inbound port feeder line and the second output port feeder line, be provided with the second parallel coupling structure and the 2 1/4 wavelength transmission line, instituteOne end of stating the second parallel coupling structure is connected with input port feeder line by the first parallel coupling structure, and the other end passes through the2 1/4 wavelength transmission lines are connected with the second output port feeder line, at described the first output port feeder line and the second output portBetween feeder line, be also provided with the 3 1/4 wavelength transmission line, the 4 1/4 wavelength transmission line and resistance, described the 3 1/4 wavelengthTransmission line one end is connected with the first output port feeder line, and the other end is connected with one end of resistance, and described the 4 1/4 wavelength passesDefeated line one end is connected with the second output port feeder line, and it is same that the other end is connected with the 3 1/4 wavelength transmission line with described resistanceOne end is connected, and the other end of described resistance is the earth plate phase with medium substrate lower surface by the metal throuth hole on medium substrateConnect.
Compared with prior art, its remarkable advantage is in the present invention:
(1) of the present invention simple in structure, can on monolithic pcb board, realize, be convenient to process, production cost is low.
(2) the present invention utilizes two sections of coupling line parity mode impedances different respectively, realize two output port power not constant amplitude divideThe characteristic of joining, has the control ability of good power-division ratios.
(3) the present invention utilizes the standing wave distribution character of main transmission line, realizes the anti-phase characteristic of two output ports.
(4) the present invention adopts the mode of isolation resistance ground connection, and output port has obtained higher isolation.
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Brief description of the drawings
Fig. 1 is the perspective view that the present invention is based on the anti-phase not decile power splitter of parallel coupling structure.
Fig. 2 is the top view that the present invention is based on the anti-phase not decile power splitter of parallel coupling structure.
Fig. 3 is the physical dimension schematic diagram of embodiment 1.
Fig. 4 is the S parameters simulation figure of embodiment 1.
Fig. 5 is the analogous diagram of two output port reflectance factors of embodiment 1.
Fig. 6 is the analogous diagram of two output port phase differences and the amplitude difference of embodiment 1.
In figure, input port feeder line 1, the first parallel coupling structure 2, the second parallel coupling structures 3, the one 1/4thWavelength transmission line 4, the second quarter-wave transmission line 5, the first output port feeder line 6, the second output port feeder lines 7,The 3rd quarter-wave transmission line 8, the four quarter-wave transmission lines 9, metal throuth hole 10, resistance 11, mediumSubstrate 12, earth plate 13;
The first coupled microstrip line 21, the second coupled microstrip line 22, the three coupled microstrip line 31, the four coupled microstrip lines 32;
Paster 101, metal column 102.
Detailed description of the invention
As shown in Figure 1 and Figure 2, the present invention is based on the anti-phase not decile power splitter of parallel coupling structure, it comprises lower surfaceThe Rectangular Enclosure with Participating Media substrate 12 that is provided with metal ground plate 13, is provided with input port feeder line at the upper surface of described medium substrate 121, the first output port feeder line 6 and the second output port feeder line 7, at described input port feeder line 1 and the first output portBetween feeder line 6, be provided with the first parallel coupling structure the 2 and the 1 wavelength transmission line 4, described the first parallel coupling structure 2One end is connected with input port feeder line 1, and the other end is by the one 1/4 wavelength transmission line 4 and the first output port feeder line 6Be connected, between described input port feeder line 1 and the second output port feeder line 7, be provided with the second parallel coupling structure 3 and the2 1/4 wavelength transmission lines 5, one end of described the second parallel coupling structure 3 is by the first parallel coupling structure 2 and inputPort feeder line 1 is connected, and the other end is connected with the second output port feeder line 7 by the 2 1/4 wavelength transmission line 5, in instituteState and between the first output port feeder line 6 and the second output port feeder line 7, be also provided with the 3 1/4 wavelength transmission line 8, the 4th1/4 wavelength transmission line 9 and resistance 11, described the 3 1/4 wavelength transmission line 8 one end and the first output port feeder line 6 phasesConnect, the other end is connected with one end of resistance 11, described the 4 1/4 wavelength transmission line 9 one end and the second output port feeder line7 are connected, and same one end that the other end is connected with the 3 1/4 wavelength transmission line 8 with described resistance 11 is connected, described resistance 11The metal throuth hole 10 of the other end by medium substrate 12 join with the earth plate 13 of medium substrate 12 lower surfaces.
In said structure, signal enters through input port feeder line 1, through the first parallel coupling structure, respectively to first1/4 wavelength transmission line 4 and the second parallel coupling structure 3 are transmitted, and the signal being transmitted by the one 1/4 wavelength transmission line 4Exported by the first output port feeder line 6 eventually, the signal being transmitted by the second parallel coupling structure 3, finally through the 2 1/4 rippleLong transmission line 5 is exported by the second output port feeder line 7.
Preferred as one, described input port feeder line 1 is vertical with the broadside of medium substrate 12, and its input is located at mediumOn a broadside of substrate 12, described the first output port feeder line 6 and the second output port feeder line 7 are all and medium substrate12 narrow limit is vertical, and its output is located at respectively on two narrow limits of medium substrate 12.
Preferred as one, described the first parallel coupling structure 2 comprises the first coupled microstrip line 21 and second being parallel to each otherCoupled microstrip line 22, described the second parallel coupling structure 3 comprises the 3rd coupled microstrip line 31 and the 4th coupling that are parallel to each otherClose microstrip line 32, described the first coupled microstrip line 21 is parallel with the broadside of medium substrate 12, described the 3rd coupled microstrip line31 are connected on one end of the first coupled microstrip line 21, the other end of described the first coupled microstrip line 21 and defeated along same linear stringInbound port feeder line 1 is vertically connected;
Described the one 1/4 wavelength transmission line 4 is parallel with the narrow limit of medium substrate 12, its one end and the second coupled microstrip line 22Vertical being connected, the other end is with first output port feeder line 6 is vertical is connected;
Described the 2 1/4 wavelength transmission line 5 is parallel with the narrow limit of medium substrate 12, its one end and the 4th coupled microstrip line 32Vertical being connected, the other end is with second output port feeder line 7 is vertical is connected.
As the preferred version of previous embodiment, described the 3 1/4 wavelength transmission line 8 is L-type right angle folding, itself andOne output port feeder line 6 limits, place, connected one end are parallel with the narrow limit of medium substrate 12, its place, one end that is connected with resistance 11Limit is parallel with medium substrate 12 broadsides;
With the 3 1/4 wavelength transmission line 8 symmetries, described the 4 1/4 wavelength transmission line 9 is L-type right angle folding, its withThe second output port feeder line 7 limits, place, connected one end are parallel with the narrow limit of medium substrate 12, its one end institute that is connected with resistance 11Parallel with medium substrate 12 broadsides on limit.
The signals transmission of said structure is:
Signal enters through input port feeder line 1, and a road signal is coupled to the one 1/4 ripple through the first parallel coupling structure 2Long transmission line 6 is exported with output port feeder line by, and another road signal is through the first parallel coupling structure 2, second parallelCoupled structure the 3 and the 2 1/4 wavelength transmission line 7, is exported by the second output port feeder line 7, due to the first parallel couplingClose structure 2 different from width and the coupling gap of the second parallel coupling structure 3, by the first output port feeder line 6 and secondThe amplitude of output port feeder line 7 output signals varies in size, due to two paths of signals transmission path difference, phase of output signalDiffer 180 °.
As preferably, described metal throuth hole 10 is connected to metal ground plate 13 by paster 101 and metal column 102.
Because wide mouthful of two outputs are passed through 1/4 wavelength transmission line 8,9 connecting resistances 11 to metal floor 13, reflected signal is by electricityResistance 11 absorbs, thereby obtains higher isolation.
Described input port feeder line 1, output port feeder line 6 are identical with 7 appearance and size, described the one 1/4 wavelength transmissionThe width of line 4, the 2 1/4 wavelength transmission line 5 is identical, and described the 3 1/4 wavelength transmission line the 8, the 4 1/4 wavelength passesThe appearance and size of defeated line 9 is identical. So just ensure that power-division ratios is subject to live width and the coupling gap control of coupling line.
The present invention is based in the anti-phase not decile power splitter of parallel coupling structure, the first parallel coupling structure 4 is parallel with secondThe length of coupled structure 5 has determined centre frequency, and the width of two parts parallel coupling structure and coupling space determine two respectivelyThe parity mode resistance value of partial coupling structure, thus determine the allotment ratio of two ends power outputs, select suitable widthCan obtain corresponding power division ratio with spacing. In addition, signal is entered by input port feeder line, flat through two partsRow coupled structure, after 180 ° of phase shifts, is fed out by the second output port through after 90 ° of the 2 1/4 wavelength transmission line phase shifts,And the signal being fed out by the first output port, only through 90 ° of the one 1/4 wavelength transmission line phase shifts. Thereby power splitter is sent outHeat anti-phase and not decile characteristic be achieved. Finally, the one two three four quarter-wave transmission line 4,5,8,9Width is larger on impedance matching impact, selects suitable width can obtain good impedance matching.
The present invention adds the metal covering at circuit substrate front and the back side by printed-circuit board manufacturing technology on manufacturingWork corrosion, thus required metal pattern formed, simple in structure, can on monolithic pcb board, realize, be convenient to processing collectionBecome, production cost is low. Meanwhile, utilize the difference of two parts coupling line parity mode impedance and the Electric Field Distribution spy of main transmission lineProperty, there is amplitude distribution ratio and good anti-phase characteristic flexibly. Because not decile power splitter phase deviation of the present invention is little,Allotment ratio standard, insertion loss are little, are applicable to modern wireless communication systems.
Below in conjunction with embodiment, the present invention is described in further detail.
Embodiment 1
As shown in Figure 1, top view as shown in Figure 2, has the structure of the anti-phase not decile power splitter based on parallel coupling structureClose dimensions as shown in Figure 3. Medium substrate 6 relative dielectric constants that adopt are 10.2, and thickness is 0.635mm,Loss angle tangent is 0.0023. In conjunction with Fig. 3, each dimensional parameters of power splitter is as follows: Wp＝0.6mm，W1＝0.9mm，W2＝0.2mm，W3＝1.4mm，W4＝0.2mm，Wr＝0.7mm，L1＝11.7mm，L2＝11.7mm，L3＝11.1mm，L4＝11.85mm，L5＝2.6mm，Lr＝0.8mm，s1＝0.3mm，s2=0.2mm. The anti-phase merit of decile is not dividedDevice does not comprise that the gross area of 50 ohm microstrip conduction bands is 16 × 26.6mm2, corresponding guide wavelength is of a size of 0.34 λg×0.56λg, wherein λgFor guide wavelength corresponding to passband central frequency.
This example power splitter is modeling and simulating in Electromagnetic Simulation software HFSS.13.0. Fig. 4 is power splitter in this exampleS parameters simulation figure, this example realize be that merit proportion by subtraction is the anti-phase power splitter of 3:1, as can be seen from the figure, this is anti-The passband central frequency of phase power splitter is 2.32GHz, and operating frequency range is 2.16-2.41GHz, in this frequency range,Return loss is better than 17.3dB, and isolation is better than 16.9dB, at centre frequency 2.32GHz place, S21＝-1.73dB，S31=-6.28dB, extra insertion loss 0.48dB.
Fig. 5 is two output port reflectance factors of power splitter in this example, as can be seen from the figure, and this example power splitterAt centre frequency 2.35GHz place, output port reflectance factor is at 11.2dB.
Fig. 6 is phase difference and the amplitude difference of two output ports of power splitter in this example, and as can be seen from the figure, this is realThe output port phase difference of example power splitter in operating frequency range is in 180 ± 5 degree, and its amplitude difference is 4.64dB.
In sum, the present invention is based on the anti-phase not decile power splitter of parallel coupling structure, according to two parts coupled structure notWith parity mode impedance, determine the power-division ratios of two output ports, in conjunction with the field point of the SIR main transmission line of terminal open circuitThe isolation network of cloth characteristic and Gysel power splitter, realized a kind of simple in structure, loss is low, isolation is high, mutually biasedThe anti-phase not decile power splitter that poor little merit proportion by subtraction is 3:1, this anti-phase not decile power splitter device is highly suitable for modern wirelessCommunication system.
Claims (6)
1. the anti-phase not decile power splitter based on parallel coupling structure, is characterized in that: comprise that lower surface is provided with metalThe Rectangular Enclosure with Participating Media substrate (12) of earth plate (13), is provided with input port feedback at the upper surface of described medium substrate (12)Line (1), the first output port feeder line (6) and the second output port feeder line (7), at described input port feeder line (1)And between the first output port feeder line (6), be provided with the first parallel coupling structure (2) and the one 1/4 wavelength transmission line (4),Described first parallel coupling structure (2) one end is connected with input port feeder line (1), and the other end is by the one 1/4 wavelengthTransmission line (4) is connected with the first output port feeder line (6), at described input port feeder line (1) and the second outputMouthful feeder line is provided with the second parallel coupling structure (3) and the 2 1/4 wavelength transmission line (5) between (7), described second flatOne end of row coupled structure (3) is connected with input port feeder line (1) by the first parallel coupling structure (2), anotherEnd is connected with the second output port feeder line (7) by the 2 1/4 wavelength transmission line (5), at described the first output portBetween feeder line (6) and the second output port feeder line (7), be also provided with the 3 1/4 wavelength transmission line (8), the 4 1/4 rippleLong transmission line (9) and resistance (11), described the 3 1/4 wavelength transmission line (8) one end and the first output port feeder line (6)Be connected, the other end is connected with the one end of resistance (11), described the 4 1/4 wavelength transmission line (9) one end and the second outputPort feeder line (7) is connected, and it is same that the other end is connected with the 3 1/4 wavelength transmission line (8) with described resistance (11)End is connected, and the other end of described resistance (11) is by metal throuth hole (10) and medium substrate on medium substrate (12)(12) earth plate of lower surface (13) joins.
2. anti-phase not decile power splitter according to claim 1, is characterized in that:
Described input port feeder line (1) is vertical with the broadside of medium substrate (12), and its input is located at medium substrate (12)A broadside on, described the first output port feeder line (6) and the second output port feeder line (7) all with medium substrate (12)Narrow limit vertical, its output is located at respectively on two narrow limits of medium substrate (12).
3. anti-phase not decile power splitter according to claim 2, is characterized in that:
Described the first parallel coupling structure (2) comprises the first coupled microstrip line (21) and the second coupling microstrip that are parallel to each otherLine (22), described the second parallel coupling structure (3) comprises the 3rd coupled microstrip line (31) and the 4th coupling that are parallel to each otherClose microstrip line (32), described the first coupled microstrip line (21) is parallel with the broadside of medium substrate (12), and the described the 3rdCoupled microstrip line (31) is connected on one end of the first coupled microstrip line (21) along same linear string, described the first coupling microstripThe other end of line (21) and vertical being connected of input port feeder line (1);
Described the one 1/4 wavelength transmission line (4) is parallel with the narrow limit of medium substrate (12), and its one end and the second coupling are micro-Band line (22) is vertically connected, the other end and the first vertical being connected of output port feeder line (6);
Described the 2 1/4 wavelength transmission line (5) is parallel with the narrow limit of medium substrate (12), and its one end and the 4th coupling are micro-Band line (32) is vertically connected, the other end and the second vertical being connected of output port feeder line (7).
4. according to the anti-phase not decile power splitter one of claims 1 to 3 Suo Shu, it is characterized in that:
Described the 3 1/4 wavelength transmission line (8) is L-type right angle folding, and it is connected with the first output port feeder line (6)Limit, place, one end is parallel with the narrow limit of medium substrate (12), its be connected with resistance (11) limit, place, one end and medium substrate (12)Broadside is parallel,
Described the 4 1/4 wavelength transmission line (9) is L-type right angle folding, and it is connected with the second output port feeder line (7)Limit, place, one end is parallel with the narrow limit of medium substrate (12), its be connected with resistance (11) limit, place, one end and medium substrate (12)Broadside is parallel.
5. anti-phase not decile power splitter according to claim 4, is characterized in that:
Described metal throuth hole (10) is connected to metal ground plate (13) by paster (101) and metal column (102).
6. according to the anti-phase not decile power splitter one of claims 1 to 3 Suo Shu, it is characterized in that: described input portFeeder line (1), output port feeder line (6) are identical with the appearance and size of (7), described the one 1/4 wavelength transmission line (4),The width of the 2 1/4 wavelength transmission line (5) is identical, and described the 3 1/4 wavelength transmission line (8), the 4 1/4 wavelength passThe appearance and size of defeated line (9) is identical.
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| CN201610164494.6A CN105591183B (en) | 2016-03-22 | 2016-03-22 | Reverse phase based on parallel coupling structure not decile power splitter |
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| CN201610164494.6A CN105591183B (en) | 2016-03-22 | 2016-03-22 | Reverse phase based on parallel coupling structure not decile power splitter |
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| CN106058392A (en) * | 2016-07-26 | 2016-10-26 | 南京理工大学 | Coupling line based broadband power filter |
| CN108417956A (en) * | 2018-03-28 | 2018-08-17 | 杭州电子科技大学 | A kind of four road power splitters |
| WO2020228402A1 (en) * | 2019-05-10 | 2020-11-19 | 华南理工大学 | Filtering, power-dividing and phase-shifting integrated antenna array feed network |
| TWI730354B (en) * | 2019-07-19 | 2021-06-11 | 國立暨南國際大學 | Power distribution/combination device |
| TWI796657B (en) * | 2021-03-24 | 2023-03-21 | 國立暨南國際大學 | Power splitter/combiner |
| CN115882225A (en) * | 2022-11-10 | 2023-03-31 | 星启空间(南通)通信设备有限公司 | Missile carrier and missile-borne antenna |
| WO2023070271A1 (en) * | 2021-10-25 | 2023-05-04 | Nokia Shanghai Bell Co., Ltd. | Coupler and related method, module and device |
| CN116613489A (en) * | 2023-07-21 | 2023-08-18 | 中天通信技术有限公司 | Phase shifter and antenna assembly |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106058392A (en) * | 2016-07-26 | 2016-10-26 | 南京理工大学 | Coupling line based broadband power filter |
| CN106058392B (en) * | 2016-07-26 | 2018-07-06 | 南京理工大学 | Broadband work(filter-divider based on coupling line |
| CN108417956A (en) * | 2018-03-28 | 2018-08-17 | 杭州电子科技大学 | A kind of four road power splitters |
| WO2020228402A1 (en) * | 2019-05-10 | 2020-11-19 | 华南理工大学 | Filtering, power-dividing and phase-shifting integrated antenna array feed network |
| US11450951B2 (en) | 2019-05-10 | 2022-09-20 | South China University Of Technology | Filtering, power-dividing and phase-shifting integrated antenna array feed network |
| TWI730354B (en) * | 2019-07-19 | 2021-06-11 | 國立暨南國際大學 | Power distribution/combination device |
| TWI796657B (en) * | 2021-03-24 | 2023-03-21 | 國立暨南國際大學 | Power splitter/combiner |
| WO2023070271A1 (en) * | 2021-10-25 | 2023-05-04 | Nokia Shanghai Bell Co., Ltd. | Coupler and related method, module and device |
| CN115882225A (en) * | 2022-11-10 | 2023-03-31 | 星启空间(南通)通信设备有限公司 | Missile carrier and missile-borne antenna |
| CN116613489A (en) * | 2023-07-21 | 2023-08-18 | 中天通信技术有限公司 | Phase shifter and antenna assembly |
| CN116613489B (en) * | 2023-07-21 | 2023-10-17 | 中天通信技术有限公司 | Phase shifter and antenna assembly |
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| CN105591183B (en) | 2018-08-10 |
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