CN105140600B - Minimize dielectric phase shifter group and antenna array feeding network - Google Patents
Minimize dielectric phase shifter group and antenna array feeding network Download PDFInfo
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Abstract
The present invention provides a kind of feeding network for minimizing dielectric phase shifter group and antenna array.Described miniaturization dielectric phase shifter group includes bottom plate, cover plate, medium block, transmission line, medium phase shift fixed column, pull bar, pull bar support block, Wiring port；The feeding network of described antenna array, divide ring and 16 antennas equipped with 8 power splitters, 8 work(outside miniaturization dielectric phase shifter group；Beneficial technique effect：Purport of the present invention is low suitable for 1.8 ~ 2.7G frequency range intermodulations, and Phase Continuation, the linearity are good, phase shift range is big, and structure of the invention is simple, easy to process.
Description
Technical Field
The invention belongs to the technical field of radio frequency communication, and particularly relates to a miniaturized dielectric phase shifter group and a feed network of an antenna array.
Background
In urban areas with dense population, in order to realize good coverage, an electric tuning intelligent antenna needs to be used, a phase shifter is used as a key component of the electric tuning antenna, and the phase shifter is used for adjusting the phase of an antenna unit in an array antenna to realize scanning of a main beam within a certain range, namely different downtilts are realized, so that cells with different areas are covered, and interference to adjacent cells is reduced. At present, 3G networks are covered in a large range, 4G license plates are issued by Ministry of industry and telecommunication in 12 months in 2013, operators in China plan to cover the 4G networks comprehensively, most of 4G antennas are prefabricated downtilt angle base station antennas, the prefabricated downtilt angle base station antennas mostly adopt 4 x 4 area arrays, 16 antenna units are counted, the space provided for wiring of a feed network by an antenna backboard is quite limited, if the electrical tuning function is to be realized, at least 32 single-cavity single-path phase shifters are required to be added on a feed line network of the prefabricated downtilt angle base station antennas, the space cannot be met, and therefore, the research and development of the miniaturized phase shifters are quite important for realizing the electrical tuning function of the 4G antennas.
Phase shifters are currently generally implemented by two approaches, one is to change the length of the transmission line and the other is to change the equivalent dielectric constant of the transmission line. For the first phase shifter, an arc phase shifter and a U-shaped sliding phase shifter are mainly taken as representatives, for example, in Chinese patent 201310338705.X, the phase output is changed by the movement between a fixed branch and a sliding branch, an insulating thin medium is generally arranged between the fixed branch and the sliding branch, and the electric connection is realized by near-distance capacitive coupling.
The second phase shifter is generally a cavity phase shifter adopting a strip line structure, a metal conduction band is fixed, a dielectric block can slide transversely or longitudinally, and a typical longitudinal sliding phase shifter is as in Chinese patent 201020148882.3. In addition, the phase shifter is suitable for TD-SCDMA (moving 3G) bands, the working frequency band is 1.7-2.2G bands, the working frequency band is narrow, and the phase shifter cannot be applied to 4G electrically-tunable broadband antennas.
Disclosure of Invention
Aiming at the defects that the existing medium phase shifter only aims at 3G network signals, is only suitable for 3G wave bands, and has high intermodulation, poor degree, poor linearity, narrow phase shifting range, complex processing, large volume, difficult installation and debugging and the like, the invention aims to provide the miniaturized medium phase shifter which is suitable for 4G networks (1.8-2.7G frequency bands), has low intermodulation, continuous phase, good linearity, large phase shifting range, simple structure and easy processing.
The specific design scheme is as follows:
a miniaturized medium phase shifter group comprises a bottom plate 7, a cover plate 6, a medium block 1, a transmission line 5, a medium phase shift fixing column 2, a pull rod 3, a pull rod supporting block 17 and a wiring port 18. Wherein, the bottom plate 7 is a rectangular block. The top of the bottom plate 7 is provided with a groove. The groove of the bottom plate 7 is internally provided with a clapboard, and the groove of the bottom plate 7 is divided into more than 2 bottom plate cavities by the clapboard. Each bottom plate cavity is provided with 1 dielectric block 1. A cover plate 6 is provided at the opening of the bottom plate 7. At the top of the cover plate 6 are 3 tie bar support blocks 17. The pull rod supporting block 17 is arranged along the length direction of the cover plate 6, and a guide hole is formed in the pull rod supporting block 17. 1 pull rod 3 sequentially passes through the guide holes of the 3 pull rod supporting blocks 17. Namely, the pull rod 3 movably connected with the pull rod supporting block 17 moves along the length direction of the cover plate 6. More than 2 pairs of supports 16 are arranged on the body of the pull rod 3. The support 16 extends in a horizontal direction and is perpendicular to the length direction of the draw bar 3. The cover plate 6 below each support 16 is provided with a kidney-shaped hole 15. The length direction of the waist-shaped hole 15 is parallel to the length direction of the pull rod 3. The length range of the waist-shaped hole 15 is the moving range of the medium block 1 in the bottom plate cavity. The corresponding support 16 is connected with the medium block 1 in the bottom plate cavity through the medium phase shifting fixing column 2. When the pull rod 3 moves, the medium block 1 is ensured to move along the length direction of the kidney-shaped hole 15 through the support 16 and the medium phase shifting fixing column 2. More than 1 transmission line 5 is provided in each backplane cavity. The transmission line 5 located in the same backplane cavity is adjacent to the dielectric block 1. More than 1 pair of wiring ports 18 are provided on the side wall of each floor cavity. Each pair of connection ports 18 is connected to 1 transmission line 5. In each pair of patch ports 18, 1 port is used as an input port, and the other 1 port is used as an output port.
The volume of each bottom plate cavity is 30cm3～50cm3In the meantime. The volume of the medium block 1 is 6cm3～10 cm3BetweenAnd the height is between 4 and 7 mm. The length of the transmission line 5 is between 50 mm and 80 mm. The length of the waist-shaped hole 15 is 10 mm-15 mm. The dielectric block 1, the transmission line 5 and the output port 18 which are positioned in the same bottom plate cavity form a dielectric phase shifter.
The antenna array feed network adopting the miniaturized dielectric phase shifter group of the invention comprises the following components: the power divider is provided with 8 power dividers 13, 8 power dividing rings 11 and 16 antennas. Wherein, each 2 power dividers 13, 2 power divider rings 11, 2 dielectric phase shifters in the miniaturized dielectric phase shifter group of the present invention, and 4 antennas form a column of antenna feed network. I.e. a total of 4 columns of antenna feed networks. In a frequency band of 1.8-2.7 GHz, the total port voltage standing wave ratio of each row of antenna feed network is less than 1.5, the frequency bandwidth is 0.9GHz, each dielectric phase shifter shifts the phase at 1.88GHz by 55 degrees, and the phase deviation output to each antenna array is less than plus or minus 5 degrees.
The advantageous technical effects of the present invention are embodied in the following aspects
The design idea and formula of the existing 3G network are adopted, so that the size of the part capable of meeting the 4G requirement is extremely large. This makes it impossible to install new devices inside the existing system, and makes it impossible to upgrade the hardware of the network system. If the whole set of network equipment is upgraded, the cost is high, and a large amount of waste of the existing 3G equipment is caused. And at present, under the condition that 3G/4G is in commercial operation, the elimination of 3G network equipment is not practical.
The invention has small and simple structure and is easy to process and manufacture.
The phase shifting proportion of the invention is flexible and changeable, when a single phase shifter works, the symmetrical structure design enables one path of signal of medium movement to realize negative phase change, the other path of signal to realize positive phase change, the phase change presents a relation of-1: 1, two phase shifters are used in cascade connection, and can realize-2: -1: +1: the phase ratio of +2, three phase shifters are used in cascade, and-3: -2: -1: +1: +2: +3 phase ratio, and so on. The design of realizing positive and negative phase shift by two signals in one cavity saves a space reserved for moving the dielectric block, reduces 32 single-cavity single-path phase shifters required by the original 4G electrically-tunable antenna to 16 single-cavity double-path phase shifters, and reduces the whole size by half.
The invention changes the phase by adopting a moving medium mode, reduces nonlinear electric connection points and has good intermodulation characteristic. The special shape design of the dielectric block greatly reduces the fluctuation of amplitude.
The special transmission line design of the invention greatly increases the phase shift degree, in other words, reduces the volume of the phase shifter.
Drawings
FIG. 1 is a schematic perspective view of a dielectric phase shifter assembly according to the present invention.
Fig. 2 is a top view of the backplane 7 of fig. 1 fitted with transmission lines 5 and output ports 18.
Fig. 3 is a top view of the cover plate 6 of fig. 1.
Fig. 4 is a top view of a single backplane cavity equipped with a dielectric block 1, transmission lines 5 and output ports 18.
Fig. 5 is a top view of the pair of transmission lines 5 of fig. 4, 1.
Fig. 6 is a top view of the dielectric block 1 of fig. 4.
Fig. 7 is a side view of the dielectric block 1 shown in fig. 6.
Fig. 8 is a schematic diagram of the feed network connections of column 1 antenna of the feed network of the antenna array using the miniaturized dielectric phase shifter group shown in fig. 1.
Fig. 9 is a schematic connection diagram of the column 1 antenna feed network shown in fig. 8.
Fig. 10 is a schematic diagram of the power divider 13 in fig. 8.
Fig. 11 is a schematic diagram of the power dividing ring 11 in fig. 8.
Fig. 12 is a top view of the drawbar 3 with 8 sets of abutments 16 mounted in fig. 1.
FIG. 13 is a diagram illustrating the performance of the dielectric phase shifter in the initial state.
FIG. 14 is a diagram illustrating the performance of the termination state of the dielectric phase shifter according to the present invention.
Fig. 15 is a perspective view of a second embodiment of the present invention.
Detailed Description
The details of the invention are described in more detail below with reference to the accompanying drawings.
Referring to fig. 1, the miniaturized dielectric phase shifter group comprises a bottom plate 7, a cover plate 6, a dielectric block 1, a transmission line 5, a dielectric phase shifting fixing column 2, a pull rod 3, a pull rod supporting block 17 and a wiring port 18. Wherein, referring to fig. 2, the bottom plate 7 is a rectangular block. The top of the bottom plate 7 is provided with a groove. The groove of the bottom plate 7 is internally provided with a clapboard, and the groove of the bottom plate 7 is divided into more than 2 bottom plate cavities by the clapboard. Each bottom plate cavity is provided with 1 dielectric block 1.
Referring to fig. 1, a cover plate 6 is provided at an opening of a base plate 7.
Referring to fig. 1, 3 tie bar support blocks 17 are provided on the top of the cover plate 6. The pull rod supporting block 17 is arranged along the length direction of the cover plate 6, and a guide hole is formed in the pull rod supporting block 17. 1 pull rod 3 sequentially passes through the guide holes of the 3 pull rod supporting blocks 17. Namely, the pull rod 3 movably connected with the pull rod supporting block 17 moves along the length direction of the cover plate 6.
Referring to fig. 12, more than 2 pairs of seats 16 are provided on the shaft of the draw bar 3. The support 16 extends in a horizontal direction and is perpendicular to the length direction of the draw bar 3.
Referring to fig. 3, a kidney-shaped hole 15 is formed in the cover plate 6 below each of the holders 16. The length direction of the waist-shaped hole 15 is parallel to the length direction of the pull rod 3. The length range of the waist-shaped hole 15 is the moving range of the medium block 1 in the bottom plate cavity.
Referring to fig. 1, a dielectric phase shift fixing post 2 is provided on each support 16. The medium phase shifting fixing column 2 extends downwards. The corresponding support 16 is connected with the medium block 1 in the bottom plate cavity through the medium phase shifting fixing column 2. When the pull rod 3 moves, the medium block 1 is ensured to move along the length direction of the kidney-shaped hole 15 through the support 16 and the medium phase shifting fixing column 2.
Referring to fig. 4, more than 1 transmission line 5 is provided in each backplane cavity. The transmission line 5 located in the same backplane cavity is adjacent to the dielectric block 1.
Referring to fig. 1, more than 1 pair of wiring ports 18 are provided on the side wall of each floor cavity. Each pair of connection ports 18 is connected to 1 transmission line 5. In each pair of patch ports 18, 1 port is used as an input port, and the other 1 port is used as an output port.
The volume of each bottom plate cavity is 30cm3～50 cm3In the meantime.
The volume of the medium block 1 is 6cm3～10 cm3And the height is between 4 and 7 mm.
The length of the transmission line 5 is between 50 mm and 80 mm.
The dielectric block 1, the transmission line 5 and the output port 18 which are positioned in the same bottom plate cavity form a dielectric phase shifter.
The phase shifter in the miniaturized dielectric phase shifter group works in a 1.8-2.7 GHz wave band, when engineering plastics with a node constant of about 2.9 are adopted as dielectric materials, the phase shift amount generated at the position of 2.3GHz of an intermediate frequency is about 73 degrees under the condition that the phase shifter slides for a distance of 10mm, the phase shift amount linearly changes along with the moving distance of a dielectric block, the voltage standing wave ratio is less than 1.2 in a frequency band, and the insertion loss fluctuation is less than 0.2 dB.
Referring to fig. 7, further, the dielectric block 1 is composed of an upper dielectric sheet 9 and a lower dielectric sheet 10. Wherein,
referring to fig. 6, the upper dielectric sheet 9 is a rectangular block. A connecting block protruding downwards is arranged at the bottom of the upper medium sheet 9. The left and right sides of the upper medium sheet 9 are respectively provided with 1T-shaped side wing plate. Namely, the upper medium sheet 9 is approximately in a shape of king. A cylindrical through-hole is provided on the downwardly protruding connection piece of the upper dielectric sheet 9, as shown in fig. 6.
Referring to fig. 6 and 7, the lower media sheet 10 is a rectangular block. A connection block protruding upward is provided on the top of the lower media sheet 10. The left and right sides of the lower medium sheet 10 are respectively provided with 1T-shaped side wing plate. Namely, the lower medium sheet 10 is approximately in a shape of king. A cylindrical through hole is provided on the upwardly protruded connection piece of the lower media sheet 10.
A dielectric block fixing column 8 is connected between the through hole of the upper dielectric sheet 9 and the through hole of the lower dielectric sheet 10. Namely, the upper medium sheet 9 and the lower medium sheet 10 are connected into an integrated body through the medium block fixing column 8.
Due to the obstruction of the connecting block at the bottom of the upper medium sheet 9 and the connecting block at the top of the lower medium sheet 10, a gap exists between the upper medium sheet 9 and the lower medium sheet 10, which is called a gap of the medium block.
Referring to fig. 1, a dielectric block 1 is connected with a rail 3 through a dielectric phase shift fixing column 2, the rail 3 drives a dielectric block 1 to move along a kidney-shaped hole 15, the initial position of the dielectric block is located at one side of ports S1 and S2, and sliding along the kidney-shaped hole 15 causes the phase variation ratio of the port S2 to the port S4 to be 1:1, the length of the kidney-shaped hole 15 determines the maximum moving distance of the dielectric block 1 and further determines the phase shift amount, and when engineering plastics with a node constant of about 2.9 are used as dielectric materials, the phase shift amount generated at the intermediate frequency of 2.3GHz is about 73 degrees under the condition that the phase shifter slides within the kidney-shaped hole for a distance of 10 mm.
The shape of the dielectric block is specially designed for the characteristics of 4G signals, so that the voltage standing wave ratio is less than 1.2 in a frequency band and the insertion loss fluctuation is less than 0.2dB in the moving process of the dielectric block of the phase shifter.
Referring to fig. 5, further, there are 2 transmission lines 5 in each backplane cavity. The transmission line 5 is strip-shaped. The length direction of the transmission line 5 is parallel to the width direction of the bottom plate 7.
Both ends of the transmission line 5 in the length direction are respectively welded with the cable cores of the adjacent wiring ports 18. I.e. the transmission line 5 is fixed in the cavity of the bottom plate and does not contact the inner wall of the cavity of the bottom plate.
The middle section of the transmission line 5 passes through the crack area of the dielectric block. I.e. the transmission line 5 is not in contact with the dielectric block 1.
The direction parallel to the length direction of the bottom plate 7 is taken as the length direction of the bottom plate cavity.
One end of the length direction of the bottom plate cavity is provided with a transmission line 5, and the middle section of the transmission line 5 and one side facing the bottom plate cavity are provided with mutually parallel comb teeth.
The other end of the length direction of the bottom plate cavity is provided with another transmission line 5, and the middle section of the transmission line 5 and one side facing the bottom plate cavity are provided with mutually parallel comb teeth.
The two ends of the transmission line are respectively provided with a rectangular strip line, the characteristic impedance of the strip line is about 50 ohms, and the transmission line is formed by aluminum alloy or metal plate punching or cutting.
The slow wave structure increases the electrical length of the transmission line in a smaller space, thereby greatly increasing the phase shift amount in the same physical length compared with the traditional dielectric phase shifter, namely greatly reducing the volume under the condition of realizing the same phase shift amount.
Referring to fig. 4, there are 4 wiring ports 18, which are sequentially identified as a first wiring port S1, a second wiring port S2, a third wiring port S3, and a fourth wiring port S4, in each backplane cavity. The first connection port S1 and the second connection port S2 are respectively connected to two ends of 1 transmission line 5, and the third connection port S3 and the fourth connection port S4 are respectively connected to two ends of another 1 transmission line 5.
Furthermore, the size of the bottom plate 7 is 40CM by 6.2CM, and the bottom plate is made of metal.
8 bottom plate cavities are arranged on the bottom plate 7. The dimensions of each baseplate cavity were 4.6CM by 5.6CM by 0.75 CM. Namely, the miniaturized dielectric phase shifter group comprises 8 dielectric phase shifters.
The size of the upper dielectric sheet 9 is 32mm x 27.5mm, the T-shaped side wing parts on two sides are composed of two rectangular blocks, wherein the size of the rectangular block perpendicular to the length direction of the transmission line 5 is 32mm x 4.8mm, the size of the rectangular block parallel to the length direction of the transmission line 5 is 6mm x 4.8mm, the size of the protruding connecting block at the bottom of the upper dielectric sheet 9 is 46.7mm x 6mm x 0.6mm, the material is nylon, and the dielectric constant is 2.9.
The size of the lower dielectric sheet 10 is 32mm x 27.5mm, the T-shaped side wing parts on two sides are composed of two rectangular blocks, wherein the size of the rectangular block perpendicular to the length direction of the transmission line 5 is 32mm x 4.8mm, the size of the rectangular block parallel to the length direction of the transmission line 5 is 6mm x 4.8mm, the size of the protruding connecting block on the top of the lower dielectric sheet 10 is 46.7mm x 6mm x 0.6mm, the material is nylon, and the node constant is 2.9.
The gap interval between the upper medium sheet 9 and the lower medium sheet 10 is 1.2 mm.
The length of transmission line 5 is 47mm, and 5 both ends rectangular blocks of transmission line are 3 x 2mm respectively, and thickness is 1 mm. The comb teeth of the transmission line 5 are all 10mm × 1.2mm in size, and the distance between the strips is 1.1mm, and the strips are formed by 20 identical strips. Two ends of the transmission line 5 in the length direction are respectively provided with 1 rectangular block, and the size of each rectangular block is 7.7mm x 3 mm. The cable core in the wiring port 18 can penetrate through the port 18 and be welded on rectangular blocks at two ends of the transmission line 5, and the transmission line 5 is made of metal.
The length of the waist-shaped hole 15 is 10 mm.
The working bandwidth of each phase shifter of the miniaturized dielectric phase shifter group is 1.8-2.7 GHz when the voltage standing wave ratio VSWR is less than 1.2, the 4G frequency band of a mobile communication system is covered, compared with the patents mentioned in the background part, the bandwidth range of most phase shifters is 1.7-2.2 GHz, the bandwidth is 0.5GHz, and the 3G frequency band of the mobile communication system is covered, the bandwidth of the miniaturized dielectric phase shifter group is 0.9Ghz, the bandwidth is improved by 80%, the volume is reduced by 50%, and the phase shifting range is increased by about 10% under the condition of the same dielectric filling and phase shifting distance. For most 4G electrically-regulated intelligent base station antennas, the space reserved for a phase shifter is only one half of that of a 3G antenna, and the patents mentioned in the background part cannot be applied to the 4G electrically-regulated intelligent antenna because of the volume relation, the miniaturization design of the invention can meet the volume requirement of the 4G antenna, meanwhile, other performance indexes are good, when the moving distance is 10mm at 1.88Ghz, the phase shift of about 55 degrees can be generated, and the insertion loss fluctuation in a frequency band is less than 0.2 dB.
Referring to fig. 8 and 9, the feed network of the miniaturized dielectric phase shifter group antenna array according to the present invention is adopted:
the power divider is provided with 8 power dividers 13, 8 power dividing rings 11 and 16 antennas. Each 2 power dividers 13, 2 power dividing rings 11, 2 dielectric phase shifters, and 4 antennas form a column of antenna feed network. I.e. a total of 4 columns of antenna feed networks.
The total port voltage standing wave ratio of each row of antenna feed network is less than 1.5 in a frequency band of 1.8-2.7 GHz, the frequency bandwidth is 0.9GHz, each dielectric phase shifter shifts the phase at 1.88GHz for 55 degrees, and the phase deviation output to each antenna array is less than plus or minus 5 degrees.
The 8 power dividing rings 11 are sequentially marked as a first power dividing ring AgfhA second power dividing ring BgfhAnd a third power dividing ring CgfhAnd a fourth power dividing ring DgfhThe fifth power dividing ring EgfhSixth power dividing ring FgfhThe seventh power dividing ring GgfhEighth power division ring Hgfh. Referring to fig. 10, the power dividing ring 11 has 4 ports, which are, in order, a power dividing ring input port Q1, a power dividing ring first output port Q2, a power dividing ring second output port Q3, and a power dividing ring third output port Q4. The power division ring first output port Q2, the power division ring second output port Q3 and the power division ring input port Q1 are adjacent, and the power division ring third output port Q4 and the power division ring input port Q3526 are adjacentThe split ring input port Q1 is opposite.
The 8 power dividers 13 are sequentially marked as a first power divider AgfqA second power divider BgfqAnd a third power divider CgfqAnd a fourth power divider DgfqThe fifth power divider EgfqSixth power divider FgfqThe seventh power divider GgfqEighth power divider Hgfq. Referring to fig. 9, the power divider 13 has 3 ports, which are, in order, a power divider input port 13a, a power divider first output port 13b, and a power divider second output port 13 c.
The 8 dielectric phase shifters are sequentially marked as a first dielectric phase shifter AyxqA second dielectric phase shifter ByxqA third dielectric phase shifter CyxqA fourth dielectric phase shifter DyxqThe fifth dielectric phase shifter EyxqSixth dielectric phase shifter FyxqSeventh dielectric phase shifter GyxqThe eighth dielectric phase shifter Hyxq。
The 16 antennas are sequentially denoted as a first antenna Ant1, second antennas Ant2, … …, a fifteenth antenna Ant15, and a sixteenth antenna Ant 16. Each 4 antennas are a group of antenna arrays, that is, the first antenna Ant1, … … and the fourth antenna Ant4 form a first row of antenna arrays, the fifth antenna Ant5, … … and the eighth antenna Ant8 form a second row of antenna arrays, … …, the thirteenth antenna Ant13, … … and the sixteenth antenna Ant16 form a fourth row of antenna arrays. The four rows of antenna arrays are mutually independent.
Referring to fig. 8 or 9, the first power divider agfqA second power divider BgfqA first power dividing ring AgfhA second power dividing ring BgfhFirst dielectric phase shifter AyxqThe fifth dielectric phase shifter EyxqAnd the first column antenna array forms a 1 st column antenna feed network.
Third power divider CgfqAnd a fourth power divider BgfqAnd the third power dividing ring AgfhAnd a fourth power dividing ring BgfhA second dielectric phase shifter ByxqSixth dielectric phase shifter FyxqAnd the second array antenna forms the 2 nd array antennaA line feed network.
Fifth power divider EgfqSixth power divider FgfqThe fifth power dividing ring EgfhSixth power dividing ring FgfhA third dielectric phase shifter CyxqSeventh dielectric phase shifter GyxqAnd the antenna array of the third column forms an antenna feed network of the 3 rd column.
Seventh power divider GgfqEighth power divider HgfqThe seventh power dividing ring GgfhEighth power division ring HgfhA fourth dielectric phase shifter DyxqThe eighth dielectric phase shifter HyxqAnd the fourth column antenna array forms a 4 th column antenna feed network.
Referring to fig. 9, the preferred scheme is:
in column 1 antenna feed network:
first power dividing ring AgfhThe first output port Q2 of the power dividing ring and the second power dividing ring BgfhThe power division ring input port Q1 is connected.
Second power dividing ring BgfhThe first output port Q2 and the second output port Q3 of the power dividing ring and the first dielectric phase shifter a respectivelyyxqThe end of the transmission line 5 in the vicinity of the first connection port S1, the first dielectric phase shifter ayxqThe end of the transmission line 5 adjacent to the third wiring port S3 is connected.
First dielectric phase shifter AyxqThe end of the transmission line 5 near the second connection port S2 and the first power divider agfqIs connected to the power divider input port 13 a.
First power divider AgfqThe first output port 13b of the power divider, the second output port 13c of the power divider and the fifth dielectric phase shifter E respectivelyyxqThe end of the transmission line 5 in the vicinity of the first wiring port S1 is connected to the second antenna Ant 2.
Fifth dielectric phase shifter EyxqThe end of the transmission line 5 adjacent to the second connection port S2 is connected to the first antenna Ant1。
First dielectric phase shifter AyxqThe end of the transmission line 5 and the second power divider B close to the third connection port S3gfqIs connected to the power divider input port 13 a.
Second power divider BgfqThe first output port 13b of the power divider, the second output port 13c of the power divider and the fifth dielectric phase shifter E respectivelyyxqThe end of the transmission line 5 adjacent to the third connection port S3 is connected to the third antenna Ant 3.
Fifth dielectric phase shifter EyxqThe end of the transmission line 5 adjacent to the fourth wiring port S4 is connected to the fourth antenna Ant 4.
And the 2 nd column antenna feed network, the 3 rd column antenna feed network and the 4 th column antenna feed network are connected according to the connection relation of the 1 st column antenna feed network.
The voltage standing-wave ratio of each row of antenna array total ports of a feed network of the antenna array adopting the miniaturized dielectric phase shifter group is less than 1.5 in a frequency band of 1.8-2.7 GHz, the frequency bandwidth is 0.9Ghz, each phase shifter shifts the phase at 1.88Ghz for 55 degrees, and the phase deviation output to each antenna unit is less than plus or minus 5 degrees, so that few manufacturers of 4G broadband electrically-tuned antennas can be realized in the industry at present, most antennas are prefabricated base stations, and the miniaturized design of the network not only can be applied to 4G electrically-tuned antenna backplanes with extremely limited space, but also can realize 14 degrees of downward tilt of a main beam of the antenna.
See fig. 13 and 14: the dielectric block of the present invention is a schematic diagram in two extreme states, each diagram is a different index of the phase shifter, the upper left and lower left are standing wave characteristic diagrams of the ports S1 and S2, the upper right is an insertion loss diagram, and the lower right is a phase shift degree diagram, and the linearity of the phase can also be seen. Fig. 13 shows the test results of the phase shifter connection ports S1 and S2 when the phase shift fixing post 2 of the dielectric block is located at the uppermost end of the kidney-shaped hole 15, at this time, the area of the transmission line 5 between the connection ports S1 and S2 covered by the dielectric block 1 is the largest, the voltage standing wave ratio curves of the connection ports S1 and S2 are the upper left and lower left graphs in fig. 13, the voltage standing wave ratio at 1.8 to 2.7GHz is less than 1.2, the upper right graph shows the insertion loss between the connection ports S1 and S2, and the insertion loss fluctuation is less than 0.2dB in the operating frequency band. The lower right diagram is the output phase of the wiring port S2, the phase at the moment is taken as a reference, after the phase is leveled, the pull rod 13 is pulled to drive the dielectric block phase shift fixing column 2 to slide to the lowest end of the kidney-shaped hole 15, the area of the transmission line 5 between the wiring port S1 and the wiring port S2 covered by the dielectric block 1 is the smallest at the moment, the test result refers to the diagram 14, the upper left diagram and the lower left diagram show that the voltage standing wave ratio of the phase shifter in a working frequency band of 1.8-2.7 GHz is less than 1.2, and the upper right diagram shows that the insertion loss fluctuation in the working frequency band is less than 0.1 dB. The lower right diagram shows the relative phase of the phase shifter output, i.e., the phase shift range of the phase shifter, which is 55 degrees at 1.88GHz and 93 degrees at 2.655GHz, and it can also be seen from the lower right diagram that the linearity of the phase shifter is good and the phase fluctuation is + -2 degrees.
The degree of phase shift of the dielectric phase shifter is 55 degrees (under the condition that the dielectric constant is 2.9) when the phase shifter moves 10mm at 1.88G.
Furthermore, the dielectric block fixing column 8 is cylindrical, the height of the cylinder is the same as the thickness of the dielectric, and the cylinder is made of the same material as the dielectric block 1.
Furthermore, the pull rod 3 at least comprises a support 16, two sides of the support 16 are respectively provided with a circular hole 4, and the medium phase-shifting fixing column 2 passes through the circular holes 4 and is fixed at the cylindrical holes at the left side and the right side of the medium block 1.
The preferred embodiment of the feed network is used in a 4G broadband smart antenna, the antenna is a 4 x 4 rectangular area array, the spacing between the rows is 70-78 mm, and the spacing between the rows is 110-118 mm.
The feed network of the antenna array comprises 16 dielectric phase shifters, 16 power splitters 13, 16 power splitting rings 11 and cables 14 for feeding the 4 × 4 antenna array on the back of the reflector 12.
The +45 polarized feed network comprises 8 dielectric phase shifters, 8 power dividers 13, 8 power dividing rings 11 and a cable 14, wherein the 8 dielectric phase shifters comprise a dielectric phase shifter A, B, C, D, E, F, G, H, I, and each dielectric phase shifter is separated by a metal wall in the baseboard cavity 7 to form an independent cavity structure.
Referring to FIG. 15, another embodiment of the miniaturized dielectric phase shifter package is as follows:
a miniaturized medium phase shifter group comprises a bottom plate 7, a cover plate 6, a medium block 1, a transmission line 5, a medium phase shift fixing column 2, a pull rod 3, a pull rod supporting block 17, a wiring port 18 and a top plate 19. Wherein, the top of the bottom plate 7 is provided with a groove. The groove of the bottom plate 7 is internally provided with a clapboard, and the groove of the bottom plate 7 is divided into 8 bottom plate cavities by the clapboard. Each bottom plate cavity is provided with 1 dielectric block 1. A cover plate 6 is provided at the opening of the bottom plate 7.
Above the cover plate 6 is a top plate 19. The bottom of the top plate 19 is provided with a groove. The groove of the top plate 19 is internally provided with a clapboard which divides the groove into 8 top plate cavities. Each top plate cavity is provided with 1 dielectric block 1.
A cover plate 6 is provided at the opening of the top plate 19.
The bottom of the cover plate 6 connected to the top plate 19 is connected to the top of the drawbar support block 17. Namely, the cover plate 6 connected with the top plate 19 and the cover plate 6 connected with the bottom plate 7 are fixedly connected together through the pull rod supporting block 17. In other words, the 2 cover plates 6, the top plate 19, and the bottom plate 7 are fixed together.
Below the top plate 19, at the top of the cover plate 6, there are 3 tie-bar support blocks 17. The pull rod supporting block 17 is arranged along the length direction of the cover plate 6, and a guide hole is formed in the pull rod supporting block 17. 1 pull rod 3 sequentially passes through the guide holes of the 3 pull rod supporting blocks 17. Namely, the pull rod 3 movably connected with the pull rod supporting block 17 moves along the length direction of the cover plate 6.
8 pairs of seats 16 are provided on the shank of the drawbar 3. The support 16 extends in a horizontal direction and is perpendicular to the length direction of the draw bar 3.
Kidney-shaped holes 15 are provided in the cover plate 6 above and below each support 16. The length direction of the waist-shaped hole 15 is parallel to the length direction of the pull rod 3. The length range of the kidney-shaped hole 15 is the moving range of the medium block 1.
Each support 16 is provided with a medium phase shifting fixing column 2. The medium phase shift fixing column 2 extends upwards and downwards. The corresponding support 16, the dielectric block 1 in the bottom plate cavity and the dielectric block 1 in the top plate cavity are connected together through the dielectric phase shift fixing column 2. When the pull rod 3 moves, the medium block 1 is ensured to move along the length direction of the kidney-shaped hole 15 through the support 16 and the medium phase shifting fixing column 2.
In each backplane cavity there are provided 2 transmission lines 5. The 2 transmission lines 5 in the same bottom plate cavity are respectively adjacent to the dielectric block 1 in the bottom plate cavity. The side wall of each bottom plate cavity is provided with 2 pairs of wiring ports 18, and the wiring ports 18 in the same bottom plate cavity are connected with the transmission lines 5 in the bottom plate cavity.
In each top plate cavity there are 2 transmission lines 5. And 2 transmission lines 5 positioned in the same top plate cavity are respectively adjacent to the dielectric blocks 1 in the top plate cavity. The side wall of each top plate cavity is provided with 2 pairs of wiring ports 18, and the wiring ports 18 in the same top plate cavity are connected with the transmission lines 5 in the top plate cavity.
The dielectric block 1, the transmission line 5 and the output port 18 which are positioned in the same bottom plate cavity form a dielectric phase shifter. The dielectric block 1, the transmission line 5 and the output port 18 which are positioned in the same top plate cavity respectively form a dielectric phase shifter. I.e. there are 16 dielectric phase shifters.
The volumes of the bottom plate cavity and the top plate cavity are both 30cm3～50cm3In the meantime. The volume of the medium block 1 is 6cm3～10 cm3And the height is between 4 and 7 mm. The length of the transmission line 5 is between 50 mm and 80 mm.
The dielectric block 1 is constituted by an upper dielectric sheet 9 and a lower dielectric sheet 10. Wherein, the upper medium piece 9 and the lower medium piece 10 are both rectangular blocks. A connecting block protruding downwards is arranged at the bottom of the upper medium sheet 9. A connection block protruding upward is provided on the top of the lower media sheet 10. The upper dielectric sheet 9 and the lower dielectric sheet 10 are connected together by the dielectric block fixing posts 8. Due to the obstruction of the connecting block at the bottom of the upper medium sheet 9 and the connecting block at the top of the lower medium sheet 10, a gap exists between the upper medium sheet 9 and the lower medium sheet 10, which is called a gap of the medium block.
The transmission line 5 is strip-shaped. The length direction of the transmission line 5 is parallel to the width direction of the bottom plate 7. The middle section of the transmission line 5 is provided with comb teeth. Both ends of the transmission line 5 in the length direction are respectively welded with the cable cores of the adjacent wiring ports 18. The middle section of the transmission line 5 passes through the crack area of the dielectric block. I.e. the transmission line 5 is not in contact with the dielectric block 1.
8 dielectric phase shifters on the bottom plate 7 are connected to the +45 degree polarized antenna feed network, and 8 dielectric phase shifters on the top plate 19 are connected to the-45 degree polarized antenna feed network.
The working bandwidth of each phase shifter in the miniaturized dielectric phase shifter group shown in this embodiment is 1.8-2.7 GHz when the voltage standing wave ratio VSWR is less than 1.2, the bandwidth is 0.9GHz, the volume of each phase shifter is 50% of that of the existing structure, and the phase shift range is increased by 10% under the condition of the same dielectric filling and phase shift distance. At 1.88Ghz, a shift distance of 10mm can produce a 55 degree phase shift with less than 0.2dB of insertion loss fluctuation within the band.
By analogy, the invention can also be extended using the same principle.
The miniaturized dielectric phase shifter has continuous and linear phase change, can realize different phase change quantity proportions by cascading, has low three-order mutual adjustment, large phase shift quantity, simple structure and easy processing, and is particularly suitable for 4G broadband electrically-tunable base station antennas with limited space.
While the invention has been described with respect to the preferred embodiments, it will be understood by those skilled in the art that the foregoing description is illustrative of the preferred embodiments of the invention and is not intended to limit the invention to the particular forms disclosed. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.
Claims (5)
1. Miniaturized medium phase shifter group, its characterized in that: the device comprises a bottom plate (7), a cover plate (6), a dielectric block (1), a transmission line (5), a dielectric phase-shifting fixing column (2), a pull rod (3), a pull rod supporting block (17) and a wiring port (18); wherein the bottom plate (7) is a rectangular block; the top of the bottom plate (7) is provided with a groove; a partition board is arranged in the groove of the bottom board (7), and the groove of the bottom board (7) is divided into more than 2 bottom board cavities by the partition board; 1 dielectric block (1) is arranged in each bottom plate cavity; a cover plate (6) is arranged at the opening of the bottom plate (7); the top of the cover plate (6) is provided with 3 pull rod supporting blocks (17); the pull rod supporting block (17) is arranged along the length direction of the cover plate (6); a guide hole is arranged on the pull rod supporting block (17); 1 pull rod (3) is arranged, and the pull rod (3) sequentially penetrates through the guide holes of the 3 pull rod supporting blocks (17); namely, the pull rod (3) movably connected with the pull rod supporting block (17) moves along the length direction of the cover plate (6); more than 2 pairs of supports (16) are arranged on the rod body of the pull rod (3); the support (16) extends along the horizontal direction, and the extending direction of the support (16) is vertical to the length direction of the pull rod (3); waist-shaped holes (15) are formed in the cover plate (6) below each support (16); the length direction of the waist-shaped hole (15) is parallel to the length direction of the pull rod (3); the length range of the waist-shaped hole (15) is the moving range of the medium block (1) in the cavity of the bottom plate;
the corresponding supports (16) are connected with the medium block (1) in the bottom plate cavity through the medium phase shift fixing columns (2); when the pull rod (3) moves, the medium block (1) is ensured to move along the length direction of the waist-shaped hole (15) through the support (16) and the medium phase-shifting fixing column (2); more than 2 transmission lines (5) are arranged in each bottom plate cavity; the transmission line (5) positioned in the same bottom plate cavity is adjacent to the dielectric block (1); more than 2 pairs of wiring ports (18) are arranged on the side wall of each bottom plate cavity; each pair of wiring ports (18) is connected with 1 transmission line (5); in each pair of wiring ports (18), 1 port is used as an input port, and the other 1 port is used as an output port; the volume of each bottom plate cavity is 30cm3～50cm3To (c) to (d); the volume of the medium block (1) is 6cm3～10 cm3The height is between 4 and 7 mm; the length of the transmission line (5) is 50-80 mm; the length of the waist-shaped hole (15) is 10 mm-15 mm; the dielectric block (1), the transmission line (5) and the output port (18) which are positioned in the same bottom plate cavity form a dielectric phase shifter;
the medium block (1) is composed of an upper medium sheet (9) and a lower medium sheet (10); wherein, the upper medium sheet (9) is a rectangular block; a connecting block protruding downwards is arranged at the bottom of the upper medium sheet (9); the left side and the right side of the upper medium sheet (9) are respectively provided with 1T-shaped side wing plate; namely, the upper medium sheet (9) is approximately in a shape of Chinese character 'wang'; a cylindrical through hole is arranged on the connecting block protruding downwards of the upper medium sheet (9);
the lower medium sheet (10) is a rectangular block; the top of the lower medium sheet (10) is provided with a connecting block protruding upwards; the left side and the right side of the lower medium sheet (10) are respectively provided with 1T-shaped side wing plate; namely, the lower medium sheet (10) is approximately in a shape of Chinese character 'wang'; a cylindrical through hole is arranged on the connecting block which is protruded upwards of the lower medium sheet (10);
a dielectric block fixing column (8) is connected between the through hole of the upper dielectric sheet (9) and the through hole of the lower dielectric sheet (10); the upper medium sheet (9) and the lower medium sheet (10) are connected into an integrated body through the medium block fixing column (8);
due to the obstruction of the connecting block at the bottom of the upper medium piece (9) and the connecting block at the top of the lower medium piece (10), a gap exists between the upper medium piece (9) and the lower medium piece (10), and the gap is called as a gap of the medium piece;
the transmission line (5) is in a strip shape; the length direction of the transmission line (5) is parallel to the width direction of the bottom plate (7); two ends of the transmission line (5) in the length direction are respectively welded with the cable cores of the adjacent wiring ports (18); namely, the transmission line (5) is fixed in the bottom plate cavity and is not contacted with the inner wall in the bottom plate cavity; the middle section of the transmission line (5) penetrates through the crack area of the dielectric block; namely, the transmission line (5) is not contacted with the dielectric block (1);
recording the direction parallel to the length direction of the bottom plate (7) as the length direction of the bottom plate cavity; one end of the length direction of the bottom plate cavity is provided with a transmission line (5), and the middle section of the transmission line (5) and one side facing the bottom plate cavity are provided with mutually parallel comb teeth; the other end of the bottom plate cavity in the length direction is provided with another transmission line (5), and the middle section of the other transmission line (5) and one side facing the bottom plate cavity are provided with mutually parallel comb teeth;
each bottom plate cavity is internally provided with 4 wiring ports (18) which are sequentially marked as a first wiring port S1, a second wiring port S2, a third wiring port S3 and a fourth wiring port S4; the first connection port S1 and the second connection port S2 are respectively connected to two ends of 1 transmission line (5), and the third connection port S3 and the fourth connection port S4 are respectively connected to two ends of another 1 transmission line (5).
2. The miniaturized dielectric phase shifter bank of claim 1, wherein: the groove of the bottom plate (7) is divided into 8 bottom plate cavities by the partition plate; a top plate (19) which is a rectangular block is arranged above the cover plate (6); the bottom of the top plate (19) is provided with a groove; a partition board is arranged in the groove of the top plate (19), and the groove is divided into 8 top plate cavities by the partition board; 1 dielectric block (1) is arranged in each top plate cavity; a cover plate (6) is arranged at the opening of the top plate (19); the bottom of the cover plate (6) connected with the top plate (19) is connected with the top of the pull rod supporting block (17); namely, the cover plate (6) connected with the top plate (19) and the cover plate (6) connected with the bottom plate (7) are fixedly connected together through a pull rod supporting block (17); 8 pairs of supports (16) are arranged on the rod body of the pull rod (3); connecting the corresponding support (16), the dielectric block (1) in the bottom plate cavity and the dielectric block (1) in the top plate cavity together through the dielectric phase shift fixing column (2); when the pull rod (3) moves, the medium block (1) is ensured to move along the length direction of the waist-shaped hole (15) through the support (16) and the medium phase-shifting fixing column (2); each bottom plate cavity is provided with 2 transmission lines (5); 2 transmission lines (5) positioned in the same bottom plate cavity are respectively adjacent to the dielectric blocks (1) in the bottom plate cavity; the side wall of each bottom plate cavity is provided with 2 pairs of wiring ports (18), and the wiring ports (18) in the same bottom plate cavity are connected with the transmission lines (5) in the bottom plate cavity; each top plate cavity is provided with 2 transmission lines (5); 2 transmission lines (5) positioned in the same top plate cavity are respectively adjacent to the dielectric blocks (1) in the top plate cavity; the side wall of each top plate cavity is provided with 2 pairs of wiring ports (18), and the wiring ports (18) in the same top plate cavity are connected with the transmission lines (5) in the top plate cavity; dielectric block (1) in the same bottom board cavityThe transmission line (5) and the output port (18) form a dielectric phase shifter; the dielectric block (1), the transmission line (5) and the output port (18) which are positioned in the same top plate cavity respectively form a dielectric phase shifter; namely 16 medium phase shifters are in total; the volumes of the bottom plate cavity and the top plate cavity are both 30cm3～50cm3To (c) to (d); the volume of the medium block (1) is 6cm3～10 cm3The height is between 4 and 7 mm; the length of the transmission line (5) is 50-80 mm;
the medium block (1) is composed of an upper medium sheet (9) and a lower medium sheet (10); wherein, the upper medium sheet (9) and the lower medium sheet (10) are both rectangular blocks; a connecting block protruding downwards is arranged at the bottom of the upper medium sheet (9); the top of the lower medium sheet (10) is provided with a connecting block protruding upwards; an upper medium sheet (9) and a lower medium sheet (10) are connected together through a medium block fixing column (8); due to the obstruction of the connecting block at the bottom of the upper medium piece (9) and the connecting block at the top of the lower medium piece (10), a gap exists between the upper medium piece (9) and the lower medium piece (10), and the gap is called as a gap of the medium piece;
the transmission line (5) is in a strip shape; the length direction of the transmission line (5) is parallel to the width direction of the bottom plate (7); the middle section of the transmission line (5) is provided with comb teeth; two ends of the transmission line (5) in the length direction are respectively welded with the cable cores of the adjacent wiring ports (18); the middle section of the transmission line (5) penetrates through the crack area of the dielectric block; namely, the transmission line (5) is not contacted with the dielectric block (1);
8 dielectric phase shifters on the bottom plate (7) are connected with a feed network of a + 45-degree polarized antenna, and 8 dielectric phase shifters on the top plate (19) are connected with a feed network of a-45-degree polarized antenna;
the working bandwidth of each phase shifter in the miniaturized dielectric phase shifter group is 1.8-2.7 GHz when the voltage standing wave ratio VSWR is less than 1.2, the bandwidth is 0.9GHz, the volume of each phase shifter is 50% of that of the existing structure, and the phase shifting range is increased by 10% under the condition of the same dielectric filling and phase shifting distance; at 1.88Ghz, a shift distance of 10mm can produce a 55 degree phase shift with less than 0.2dB of insertion loss fluctuation within the band.
3. The miniaturized dielectric phase shifter bank of claim 1, wherein: the size of the bottom plate (7) is 40CM 6.2CM, and the bottom plate is made of metal; 8 bottom plate cavities are formed in the bottom plate (7); the size of each baseplate cavity is 4.6CM by 5.6CM by 0.75 CM; namely, the miniaturized dielectric phase shifter group comprises 8 dielectric phase shifters;
the size of the upper dielectric sheet (9) is 32mm x 27.5mm, the T-shaped side wing parts on two sides are composed of two rectangular blocks, wherein the size of the rectangular block perpendicular to the length direction of the transmission line (5) is 32mm x 4.8mm, the size of the rectangular block parallel to the length direction of the transmission line (5) is 6mm x 4.8mm, the size of the protruding connecting block at the bottom of the upper dielectric block (9) is 46.7mm x 6mm x 0.6mm, the material is nylon, and the dielectric constant is 2.9;
the size of the lower dielectric sheet (10) is 32mm x 27.5mm, the T-shaped side wing parts on two sides are composed of two rectangular blocks, wherein the size of the rectangular block perpendicular to the length direction of the transmission line (5) is 32mm x 4.8mm, the size of the rectangular block parallel to the length direction of the transmission line (5) is 6mm x 4.8mm, the size of the convex connecting block on the top of the lower dielectric block (10) is 46.7mm x 6mm x 0.6mm, the material is nylon, and the node constant is 2.9; the gap interval between the upper medium sheet (9) and the lower medium sheet (10) is 1.2 mm;
the length of each transmission line (5) is 47mm, and the thickness of each transmission line is 1 mm; the comb teeth of the transmission line (5) are all 10mm by 1.2mm in size, and the distance between the strips is 1.1mm, and the comb teeth are formed by 20 same strips; two ends of the transmission line (5) in the length direction are respectively provided with 1 rectangular block, and the size of each rectangular block is 7.7mm x 3 mm; the cable inner core in the wiring port (18) can penetrate through the port (18) and be welded on rectangular blocks at two ends of the transmission line (5), and the transmission line (5) is made of metal;
the length of the waist-shaped hole (15) is 10 mm; the working bandwidth of each phase shifter of the miniaturized dielectric phase shifter group is 1.8-2.7 GHz when the voltage standing wave ratio VSWR is less than 1.2, and the miniaturized dielectric phase shifter group covers the 4G frequency band of a mobile communication system; the bandwidth of the phase shifter is 0.9Ghz, the bandwidth is improved by 80 percent and the volume is reduced by 50 percent compared with the phase shifter of a 3G frequency band, and the phase shifting range is increased by 10 percent under the conditions of the same medium filling and phase shifting distance; the invention can generate 55-degree phase shift at 1.88Ghz when the moving distance is 10mm, and the insertion loss fluctuation in a frequency band is less than 0.2 dB.
4. The antenna array feed network using the miniaturized dielectric phase shifter assembly of claim 1, wherein: the power divider is provided with 8 power dividers (13), 8 power dividing rings (11) and 16 antennas; each 2 power dividers (13), 2 power divider rings (11), 2 dielectric phase shifters and 4 antennas form a column of antenna feed network; namely, 4 rows of antenna feed networks are shared;
the total port voltage standing wave ratio of each row of antenna feed network is less than 1.5 in a frequency band of 1.8-2.7 GHz, the frequency bandwidth is 0.9GHz, each dielectric phase shifter shifts the phase at 1.88GHz for 55 degrees, and the phase deviation output to each antenna array is less than plus or minus 5 degrees.
5. The antenna array feed network employing the miniaturized dielectric phase shifter bank of claim 4, wherein: the 8 power dividing rings (11) are sequentially marked as a first power dividing ring AgfhA second power dividing ring BgfhAnd a third power dividing ring CgfhAnd a fourth power dividing ring DgfhThe fifth power dividing ring EgfhSixth power dividing ring FgfhThe seventh power dividing ring GgfhEighth power division ring Hgfh(ii) a The power distribution ring (11) is provided with 4 ports, namely a power distribution ring input port (Q1), a power distribution ring first output port (Q2), a power distribution ring second output port (Q3) and a power distribution ring third output port (Q4) in sequence; the power division ring input port (Q1) is adjacent to the power division ring first output port (Q2) and the power division ring second output port (Q3), and the power division ring third output port (Q4) is opposite to the power division ring input port (Q1);
the 8 power dividers (13) are sequentially marked as a first power divider AgfqA second power divider BgfqAnd a third power divider CgfqAnd a fourth power divider DgfqThe fifth power divider EgfqSixth power dividerFgfqThe seventh power divider GgfqEighth power divider Hgfq(ii) a The power divider (13) is provided with 3 ports, namely a power divider input port (13 a), a power divider first output port (13 b) and a power divider second output port (13 c) in sequence;
the 8 dielectric phase shifters are sequentially marked as a first dielectric phase shifter AyxqA second dielectric phase shifter ByxqA third dielectric phase shifter CyxqA fourth dielectric phase shifter DyxqThe fifth dielectric phase shifter EyxqSixth dielectric phase shifter FyxqSeventh dielectric phase shifter GyxqThe eighth dielectric phase shifter Hyxq；
The 16 antennas are sequentially marked as a first antenna Ant1, second antennas Ant2, … …, a fifteenth antenna Ant15 and a sixteenth antenna Ant 16; each 4 antennas form a group of antenna arrays, namely, a first antenna Ant1, a first antenna Ant … … and a fourth antenna Ant4 form a first row of antenna arrays, a fifth antenna Ant5, a fifth antenna Ant … … and an eighth antenna Ant8 form a second row of antenna arrays, … …, a thirteenth antenna Ant13, a thirteenth antenna Ant … … and a sixteenth antenna Ant16 form a fourth row of antenna arrays; the four rows of antenna arrays are mutually independent;
first power divider AgfqA second power divider BgfqA first power dividing ring AgfhA second power dividing ring BgfhFirst dielectric phase shifter AyxqThe fifth dielectric phase shifter EyxqAnd the first column antenna array form a 1 st column antenna feed network;
third power divider CgfqAnd a fourth power divider BgfqAnd the third power dividing ring AgfhAnd a fourth power dividing ring BgfhA second dielectric phase shifter ByxqSixth dielectric phase shifter FyxqAnd the second row of antenna arrays form a 2 nd row of antenna feed network;
fifth power divider EgfqSixth power divider FgfqThe fifth power dividing ring EgfhSixth power dividing ring FgfhA third dielectric phase shifter CyxqSeventh dielectric phase shifter GyxqAnd the third column of antenna arrays form a 3 rd column of antenna feed network;
seventh power divider GgfqEighth power divider HgfqThe seventh power dividing ring GgfhEighth power division ring HgfhA fourth dielectric phase shifter DyxqThe eighth dielectric phase shifter HyxqAnd the fourth row of antenna arrays form a 4 th row of antenna feed network;
in column 1 antenna feed network:
first power dividing ring AgfhA first output port (Q2) of the power dividing ring and a second power dividing ring BgfhThe input ports (Q1) of the power division ring are connected;
second power dividing ring BgfhThe first output port (Q2) and the second output port (Q3) of the power dividing ring and the first dielectric phase shifter A respectivelyyxqAn end of the transmission line (5) near the first connection port S1, a fifth dielectric phase shifter EyxqThe end of the transmission line (5) in the vicinity of the third wiring port S3 is connected;
first dielectric phase shifter AyxqThe end of the transmission line (5) close to the second connection port S2 and the first power divider AgfqThe input ports (13 a) of the power dividers are connected;
first power divider AgfqThe first output port (13 b) and the second output port (13 c) of the power divider and the fifth dielectric phase shifter E are respectively arranged on the same substrateyxqThe end of the transmission line (5) in the vicinity of the first connection port S1 is connected to the second antenna Ant 2; fifth dielectric phase shifter EyxqThe end of the transmission line (5) adjacent to the second connection port S2 is connected to the first antenna Ant 1;
fifth dielectric phase shifter EyxqThe end of the transmission line (5) close to the fourth connection port S4 and the second power divider BgfqThe input ports (13 a) of the power dividers are connected;
second power divider BgfqThe first output port (13 b) and the second output port (13 c) of the power divider are respectively connected with the first dielectric phase shifter AyxqThe end of the transmission line (5) in the vicinity of the third connection port S3 is connected to the third antenna Ant 3; first dielectric phase shifter AyxqThe end of the transmission line (5) adjacent to the fourth patch port S4 is connected to a fourth antenna Ant 4;
the 2 nd row antenna feed network, the 3 rd row antenna feed network and the 4 th row antenna feed network are connected according to the connection relation of the 1 st row antenna feed network;
according to the feed network of the antenna array adopting the miniaturized dielectric phase shifter group, in a frequency band of 1.8-2.7 GHz, the standing-wave ratio of the total port voltage of each row of the antenna array is smaller than 1.5, the frequency bandwidth is 0.9GHz, each phase shifter shifts 55 degrees at the position of 1.88GHz, and the phase deviation output to each antenna unit is smaller than plus or minus 5 degrees, so that few manufacturers of 4G broadband electrically-tunable intelligent antennas can be realized in the industry at present, most of the antennas are prefabricated downtilt antennas, the miniaturized design of the feed network not only can be applied to 4G electrically-tunable antenna backplanes with very limited space, but also can realize 14 degrees of downtilt of a main beam of the antenna.
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| EP3389139B1 (en) * | 2015-12-30 | 2021-02-03 | Huawei Technologies Co., Ltd. | Array antenna system |
| CN106212215A (en) * | 2016-07-29 | 2016-12-14 | 凌企芳 | Can the intelligent landscape irrigation system of infrared acquisition |
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