CN113823884A - Dielectric phase shifter and base station antenna - Google Patents
Dielectric phase shifter and base station antenna Download PDFInfo
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- CN113823884A CN113823884A CN202111106579.6A CN202111106579A CN113823884A CN 113823884 A CN113823884 A CN 113823884A CN 202111106579 A CN202111106579 A CN 202111106579A CN 113823884 A CN113823884 A CN 113823884A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/18—Phase-shifters
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
- H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
- H01Q1/246—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for base stations
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Waveguide Switches, Polarizers, And Phase Shifters (AREA)
Abstract
The invention provides a dielectric phase shifter and a base station antenna, wherein the dielectric phase shifter comprises: the feed circuit comprises a cavity, a PCB (printed circuit board) substrate, a pull rod with teeth, a gear medium and a feed network, wherein the PCB substrate, the pull rod with teeth, the gear medium and the feed network are all arranged in the cavity; the gear medium comprises a plurality of phase-shifting medium sheets which are respectively and symmetrically connected along the upper surface and the lower surface of the PCB substrate, the upper surface and the lower surface of the PCB substrate are respectively provided with the toothed pull rod, the toothed pull rod drives the phase-shifting medium sheets to rotate, and the phase shifting is realized by combining the setting of the feed network. According to the dielectric phase shifter and the base station antenna provided by the invention, the area of the phase-shifting dielectric sheet and the volume of the metal cavity are effectively reduced through the highly integrated arrangement of the phase-shifting dielectric sheet, and the stroke of the sliding pull rod is reduced, so that the purposes of miniaturization and cost reduction are realized.
Description
Technical Field
The invention relates to the technical field of antennas, in particular to a dielectric phase shifter and a base station antenna.
Background
In the rapid development of mobile communication technology, large-scale array antennas have already started to be widely applied, but the traditional mechanically downtilted array antennas with fixed inclination angles have not met the requirements of base station antenna construction in the current complex scene. Compared with the conventional mechanical downtilt antenna, the antenna with the electrically downtilt angle is more suitable for a wider environment and more convenient. Therefore, a phase shifter of a key component in the electrically-tuned antenna becomes a key technology of a large-scale array antenna, and the size and the index of the whole antenna are directly influenced by the structural size, the space utilization rate and the processing and mounting difficulty of the electrically-tuned antenna.
In order to realize the electrically-controlled downtilt, a phase shifter is needed, two main implementation forms of the currently-used phase shifter are provided, one implementation form is to realize the shift direction by changing the length of a physical wire, the phase shifter is already applied for many years and has a mature design scheme, but the circuit design of the PCB phase shifter is largely fed by using a coupling mode, so that the module loss is high, and further the whole gain index of a base station antenna is influenced, and the other implementation form of the phase shifter is to realize the phase shifter by changing the electrical length in the phase shifter by changing the dielectric constant, so that the phase shifter has low loss and excellent electrical performance, but the cost is increased compared with that of the PCB phase shifter due to the adoption of a strip line design, and therefore the scheme for reducing the dielectric phase shifter is a current hot research direction.
In the application of a large-scale array electrically-tunable antenna, a phase shifter is required to be connected in each path of signal to realize the control of the phase, and therefore two technical schemes are introduced, one is that a plurality of phase shifters are used to realize the downward inclination, but the scheme occupies a large space of a PCB feed network layout, increases the difficulty of antenna design, and also causes the problems of complex processing, high cost, inconvenience in mounting and welding and low mass production efficiency; the other scheme is to use a multi-port phase shifter integrating a plurality of moving sections, the phase shifter effectively avoids the problems caused by using one phase shifter in large quantity, but the problems of large volume and high cost still exist, for example, a low-frequency one-to-five medium phase shifter is taken as an example, the length of the low-frequency one-to-five medium phase shifter is usually about 500mm or even longer, and the problem of high cost is caused by an overlarge volume.
Disclosure of Invention
The invention provides a dielectric phase shifter and a base station antenna, which are used for solving the defects that in the prior art, the phase shifter in the antenna occupies a large space of the whole antenna layout and the cost of the dielectric phase shifter is high.
In a first aspect, the present invention provides a dielectric phase shifter, comprising:
cavity, PCB base plate, take tooth pull rod, gear medium and feed network, wherein:
the PCB substrate, the toothed pull rod, the gear medium and the feed network are all arranged in the cavity;
the gear medium comprises a plurality of phase-shifting medium sheets which are respectively and symmetrically connected along the upper surface and the lower surface of the PCB substrate, the upper surface and the lower surface of the PCB substrate are respectively provided with the toothed pull rod, the toothed pull rod drives the phase-shifting medium sheets to rotate, and the phase shifting is realized by combining the setting of the feed network.
In one embodiment, the cavity is a hexahedral single-layer structure, wherein:
the upper surface and the lower surface of the cavity are partially closed, a plurality of round copper holes are uniformly distributed along the periphery of the upper surface and the lower surface, and the round copper holes are used for welding cables;
the left and right parts of the cavity are partially closed, clamping grooves for mounting the PCB substrate are arranged along the inner sides of the left and right sides, and a plurality of circular openings are uniformly distributed along the outer sides of the left and right sides and used for inserting cables;
the front surface and the rear surface of the cavity are arranged in an open mode so that the toothed pull rod can slide.
In one embodiment, a strip-shaped groove is formed in the middle of the PCB substrate along the long side direction, and the pull rod with teeth is fixed on the PCB substrate through the strip-shaped groove and slides along the strip-shaped groove;
the PCB base plate is followed bar groove symmetry sets up four groups arc flutings, the gear medium passes through four groups arc flutings are fixed on the PCB base plate and rotate along the arc fluting.
In one embodiment, the toothed pull rod comprises a first toothed pull rod and a second toothed pull rod;
the first toothed pull rod is positioned on the upper surface of the PCB substrate, is fixed in the strip-shaped groove and is used for driving the gear medium positioned on the upper surface of the PCB substrate to rotate along the arc-shaped groove;
the second toothed pull rod is positioned on the lower surface of the PCB substrate, is fixed in the strip-shaped groove and is used for driving the gear medium positioned on the lower surface of the PCB substrate to rotate along the arc-shaped groove;
the first toothed pull rod penetrates through the strip-shaped groove through a male buckle convex structure, and is fixedly connected with the second toothed pull rod through a female buckle concave structure.
In one embodiment, the gear medium comprises four first phase-shifting medium sheets and four second phase-shifting medium sheets, and a single first phase-shifting medium sheet and a single second phase-shifting medium sheet are tightly connected through an arc-shaped slot and rotate along the arc-shaped slot.
In one embodiment, the gear medium is in a circular shape with a gear-shaped outer edge, the circular shape comprises four equally divided quarter circles, one group of the centrosymmetric quarter circles is hollow, and the other group of the centrosymmetric quarter circles is filled with the medium;
correspondingly, the medium filling part of the first phase-shifting medium piece is uniformly provided with a plurality of male buckle convex structures and a plurality of windowing structures, the medium filling part of the second phase-shifting medium piece is uniformly provided with a plurality of female buckle concave structures and a plurality of windowing structures, and the plurality of male buckle convex structures, the plurality of female buckle concave structures and the plurality of windowing structures are all linearly arranged.
In one embodiment, the feed network comprises a plurality of phase shift circuits and a plurality of functional circuits, the phase shift circuits and the functional circuits are alternately electrically connected, and a single phase shift circuit is electrically connected with at least two functional circuits;
the phase shift circuits comprise a plurality of groups of double-layer arc strip lines which are concentric with the gear medium, when the gear medium slides on the phase shift circuits, the area of the medium covering the phase shift circuits is changed, and the length of the arc strip lines is changed to realize phase shift;
the functional circuits comprise strip line power dividers, matched impedances connected with the phase-shifting circuits and expansion circuits integrated based on preset requirements.
In one embodiment, the phase shift circuits are alternately arranged and linearly arranged, and each phase shift circuit is electrically connected with two adjacent functional circuits, so that the feed network is in a single-layer structure.
In one embodiment, the phase shift circuits are stacked and staggered, and each phase shift circuit is electrically connected with two adjacent functional circuits, so that the feed network is in a double-layer structure.
In a second aspect, the present invention further provides a base station antenna, including any one of the dielectric phase shifters.
According to the dielectric phase shifter and the base station antenna provided by the invention, the area of the phase-shifting dielectric sheet and the volume of the metal cavity are effectively reduced through the highly integrated arrangement of the phase-shifting dielectric sheet, and the stroke of the sliding pull rod is reduced, so that the purposes of miniaturization and cost reduction are realized.
Drawings
In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings needed for the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
FIG. 1 is an exploded view of a dielectric phase shifter according to the present invention;
FIG. 2 is a schematic diagram of an external appearance of a dielectric phase shifter provided by the present invention;
FIG. 3 is an exploded side view of a dielectric phase shifter provided in the present invention;
FIG. 4 is a schematic diagram of a PCB (without striplines) of a dielectric phase shifter provided by the present invention;
FIG. 5 is a schematic strip line diagram of a dielectric phase shifter provided in the present invention;
FIG. 6 is a schematic view of a gear-shaped dielectric plate of the dielectric phase shifter according to the present invention;
fig. 7 is a schematic view of a toothed pull rod of a dielectric phase shifter provided by the present invention.
Reference numerals:
100: medium sliding type phase shifting 11: a cavity; 12: a PCB substrate; a machine;
121: forming a hole on the PCB substrate; 122: a strip-shaped groove; 123: arc-shaped grooving;
124: arc-shaped grooving; 125: arc-shaped grooving; 126: arc-shaped grooving;
13: a pull rod with teeth; 131: a first toothed pull rod; 1311: male buckle convex structure;
1312: male buckle convex structure; 132: a second toothed pull rod; 1321: the female buckle is of a concave structure;
1322: the female buckle is of a concave structure; 14: a gear medium; 141: a first phase shift dielectric sheet;
1411: male buckle convex structure 1412: the windowing structure 142: a first phase shift dielectric sheet;
143: a first phase shift dielectric sheet; 144: a first phase shift dielectric sheet; 145: a second phase shift dielectric sheet;
146: a second phase shift dielectric sheet; 147: a second phase shift dielectric sheet; 1471: the female buckle is of a concave structure;
1473: a gear structure; 148: second phase-shift medium 15: a feed network; slicing;
1501: a phase shift circuit; 1502: a phase shift circuit; 1503: a phase shift circuit;
1504: a phase shift circuit; 1505: a functional circuit; 1506: a functional circuit;
1507: a functional circuit; 1508: a functional circuit; 1509: a functional circuit;
1510: a functional circuit.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.
Fig. 1 is an exploded view of a dielectric phase shifter provided by the present invention, as shown in fig. 1, including:
cavity, PCB base plate, take tooth pull rod, gear medium and feed network, wherein:
the PCB substrate, the toothed pull rod, the gear medium and the feed network are all arranged in the cavity;
the gear medium comprises a plurality of phase-shifting medium sheets which are respectively and symmetrically connected along the upper surface and the lower surface of the PCB substrate, the upper surface and the lower surface of the PCB substrate are respectively provided with the toothed pull rod, the toothed pull rod drives the phase-shifting medium sheets to rotate, and the phase shifting is realized by combining the setting of the feed network.
Specifically, the dielectric phase shifter 100 provided by the invention comprises a cavity 11, a PCB substrate 12, a pull rod 13 with teeth, a gear dielectric 14 and a feed network 15; the PCB substrate 12, the toothed pull rod 13, the gear medium 14 and the feed network 15 are all placed in the cavity 11.
The gear medium 14 comprises a plurality of phase-shifting medium pieces, which are divided into a first phase-shifting medium piece and a second phase-shifting medium piece, the first phase-shifting medium piece and the second phase-shifting medium piece are respectively fixed on the upper surface and the lower surface of the PCB substrate 12, the single first phase-shifting medium piece and the single second phase-shifting medium piece are symmetrically connected along the PCB substrate 12, the upper surface and the lower surface of the PCB substrate are respectively provided with a first toothed pull rod 131 and a second toothed pull rod 132, the first toothed pull rod 131 drives the plurality of first phase-shifting medium pieces to rotate, the second toothed pull rod 132 drives the plurality of second phase-shifting medium pieces to rotate, and the feed network arranged on the PCB substrate 12 is matched with the first toothed pull rod 131 and the second toothed pull rod 132, so that the phase-shifting requirement is realized.
According to the invention, the PCB substrate, the toothed pull rod, the gear medium and the feed network are all integrated in the cavity, so that the high integration of the medium phase shifter is realized.
Based on the above embodiment, the cavity is a hexahedral single-layer structure, wherein:
the upper surface and the lower surface of the cavity are partially closed, a plurality of round copper holes are uniformly distributed along the periphery of the upper surface and the lower surface, and the round copper holes are used for welding cables;
the left and right parts of the cavity are partially closed, clamping grooves for mounting the PCB substrate are arranged along the inner sides of the left and right sides, and a plurality of circular openings are uniformly distributed along the outer sides of the left and right sides and used for inserting cables;
the front surface and the rear surface of the cavity are arranged in an open mode so that the toothed pull rod can slide.
Specifically, as shown in fig. 2 and 3, the cavity 11 is a hexahedron having an accommodating cavity, the cavity 11 may be integrally formed by a pultrusion process, and is a single-layer cavity structure in which the upper and lower portions are closed, circular copper holes for welding cables are distributed, the left and right portions are closed, a slot for mounting the PCB substrate 12 and a circular opening for inserting the cables are distributed, and the front and rear surfaces are not closed. From the quantity, cavity 11 surface has 2N trompils, and N is welding trompil wherein, and N is for feeding core interface.
Alternatively, the cavity 11 is generally provided with a limiting groove for fixing the PCB substrate 12 at the center of the cavity walls at both sides, and a limiting sliding groove for fixing the toothed pull rod is provided at the center of the upper and lower cavity walls, or the cavity wall at one side of the cavity 11 is provided with a limiting groove for fixing the PCB substrate 12, and the limiting sliding groove for fixing the toothed pull rod is provided at the other side.
According to the invention, the plurality of through holes are arranged outside the cavity and used for externally connecting cables, and the clamping grooves are arranged inside the cavity and used for fixing the substrate and the pull rod, so that the volume of the cavity can be effectively reduced, more components can be accommodated, and the integration function is realized.
Based on any one of the above embodiments, the middle position of the PCB substrate along the long side direction is provided with a strip-shaped groove, and the pull rod with teeth is fixed on the PCB substrate through the strip-shaped groove and slides along the strip-shaped groove;
the PCB base plate is followed bar groove symmetry sets up four groups arc flutings, the gear medium passes through four groups arc flutings are fixed on the PCB base plate and rotate along the arc fluting.
Specifically, as shown in fig. 4, four sets of arc-shaped slots 123-126 are distributed on the PCB 12, the gear medium 14 is fixed on the PCB 12 through the four sets of arc-shaped slots 123-126 and can rotate along the arc-shaped slots, a strip-shaped slot 122 is further distributed on the PCB 12, and the toothed pull rod 13 is fixed on the PCB 12 through the strip-shaped slot 122 and can slide along the strip-shaped slot 122.
The PCB substrate separates the gear media of the upper layer and the lower layer in the cavity and is connected through the arc-shaped open slot, so that the gear media can be flexibly arranged according to the phase shift requirement.
According to any of the above embodiments, the toothed pull rod comprises a first toothed pull rod and a second toothed pull rod;
the first toothed pull rod is positioned on the upper surface of the PCB substrate, is fixed in the strip-shaped groove and is used for driving the gear medium positioned on the upper surface of the PCB substrate to rotate along the arc-shaped groove;
the second toothed pull rod is positioned on the lower surface of the PCB substrate, is fixed in the strip-shaped groove and is used for driving the gear medium positioned on the lower surface of the PCB substrate to rotate along the arc-shaped groove;
the first toothed pull rod penetrates through the strip-shaped groove through a male buckle convex structure, and is fixedly connected with the second toothed pull rod through a female buckle concave structure.
Specifically, as shown in fig. 3 and 7, the toothed tie 13 includes a first toothed tie 131 having male buckle convex structures 1311 and 1312 and a second toothed tie 132 having female buckle concave structures 1321 and 1322, and the first toothed tie 131 and the second toothed tie 132 are fastened through the strip-shaped groove 122 of the PCB substrate 12 and can slide along the strip-shaped groove 122.
Alternatively, both sides of the toothed pull rod 13 are toothed or one side of the toothed pull rod is toothed, the toothed pull rod 13 can be meshed with the gear medium 14, and the gear medium 14 can be driven to rotate along the arc-shaped slot by horizontally moving the toothed pull rod 13.
Compared with the traditional phase shifter with a fixed configuration mode, the toothed pull rod provided by the invention is more flexible and convenient to arrange, and the movement stroke of the pull rod is greatly shortened.
Based on any one of the above embodiments, the gear medium includes four first phase-shifting medium pieces and four second phase-shifting medium pieces, and the single first phase-shifting medium piece and the single second phase-shifting medium piece are fastened and connected through the arc-shaped slot and rotate along the arc-shaped slot.
The gear medium is in a circular shape with the outer edge in a gear shape, the circular shape comprises four equally divided quarter circles, one group of the quarter circles with central symmetry is hollow, and the other group of the quarter circles with central symmetry is filled with the medium;
correspondingly, the medium filling part of the first phase-shifting medium piece is uniformly provided with a plurality of male buckle convex structures and a plurality of windowing structures, the medium filling part of the second phase-shifting medium piece is uniformly provided with a plurality of female buckle concave structures and a plurality of windowing structures, and the plurality of male buckle convex structures, the plurality of female buckle concave structures and the plurality of windowing structures are all linearly arranged.
Specifically, as shown in fig. 3 and fig. 6, the gear medium 14 includes 4 first phase-shifting medium plates 141 and 144 with male-buckle convex structures 1411 and 4 second phase-shifting medium plates 145 and 148 with female-buckle concave structures 1471, and the single first phase-shifting medium plate and the single second phase-shifting medium plate are fastened and connected through four sets of arc-shaped slots 123 and 126 on the PCB substrate 12.
The gear medium 14 is a circle with a gear-shaped outer edge, and the inside of the circle is equally divided into four quarter circles, wherein one group of the quarter circles with central symmetry is hollow, and the other group of the quarter circles with central symmetry is filled with the medium.
In addition, the first toothed pull rod 131 is engaged with the first phase shifting medium piece 141 and 144, the second toothed pull rod 132 is engaged with the second phase shifting medium piece 145 and 148, and the toothed pull rod 13 drives the medium to rotate and slide along the chute when moving horizontally along the chute.
Optionally, on the first phase-shifting dielectric sheet, the windowing structure 1412 is a windowing structure for ensuring that the impedance is still matched when the feed network is located at different strokes, and the size of the windowing structure can be adjusted or designed to be a half-windowing structure according to the actual impedance matching requirement; on the second phase shift dielectric sheet, the gear structure 1473 is a gear structure that meshes with the toothed tie 13.
The phase control adjustment is realized by the rotatable phase shifting medium sheets in pairs, the adjustment of the medium phase shifter to multiple paths of signals can be realized, the loss of the medium phase shifter is smaller compared with a PCB phase shifter, and compared with the existing method that a large number of single independent phase shifters are used, the number of cavities can be reduced, the space required by installation is reduced, the processing difficulty and cost are reduced, and the installation is convenient.
Based on any one of the above embodiments, the feed network includes a plurality of phase shift circuits and a plurality of functional circuits, the phase shift circuits and the functional circuits are alternately electrically connected, and a single phase shift circuit is electrically connected with at least two functional circuits;
the phase shift circuits comprise a plurality of groups of double-layer arc strip lines which are concentric with the gear medium, when the gear medium slides on the phase shift circuits, the area of the medium covering the phase shift circuits is changed, and the length of the arc strip lines is changed to realize phase shift;
the functional circuits comprise strip line power dividers, matched impedances connected with the phase-shifting circuits and expansion circuits integrated based on preset requirements.
The phase shift circuits are alternately arranged and linearly arranged, and each phase shift circuit is electrically connected with two adjacent functional circuits, so that the feed network is in a single-layer structure.
The phase shift circuits are arranged in a stacked and staggered mode, and each phase shift circuit is electrically connected with two adjacent functional circuits, so that the feed network is of a double-layer structure.
Specifically, as shown in fig. 5, the feeding network 15 includes two parts, namely a functional circuit and a phase shift circuit. Four sets of arc-shaped strip lines 1501-1504 are phase-shifting circuits, and the remaining six sets of strip lines 1505-1510 are functional circuits. The functional circuits are alternately electrically connected with the phase shift circuits, and one phase shift circuit is connected with at least two functional circuits. When N paths of signals with established phases need to be output, the feed network 15 needs to include N +1 functional circuits and N phase shift circuits. The phase shift circuit 1501-1504 has a structure that multiple groups of double-layer arc-shaped strip lines are concentric with the gear medium 14, and when the medium slides on the phase shift circuit, the area of the medium covering the phase shift circuit is changed, so that the electrical length of the strip lines is changed, and phase shift is realized. The functional circuit 1505-1510 mechanism includes a strip line power divider and an impedance matching branch connected to the phase-shifting circuit, in addition, the functional circuit can integrate a filtering circuit, a phase balancing circuit, a combining circuit and a lightning protection expanding circuit according to the requirement of the actual circuit.
Here, the phase shift section strip line corresponding to one gear medium 14 is two sets of quarter arc bending strip lines with central symmetry, and one set of arc bending strip lines is composed of N arc strip lines with length increasing from the center of circle outwards, the PCB substrate 12 includes N-1 functional section strip lines, each power section strip line has 3 ports, wherein 2 ports are connected with the gear medium 14, and 1 port is connected to the feed network of the base station antenna.
Optionally, the functional circuits and the phase shift circuits are alternately arranged and are linearly arranged, and each phase shift circuit is electrically connected with two adjacent functional circuits, so that the feed network is in a single-layer structure;
or the phase shift circuits are stacked and staggered, and the two functional circuits are electrically connected through one phase shift circuit, so that the feed network is in a double-layer structure.
The dielectric phase shifter is capable of adjusting multiple paths of signals simultaneously, has smaller loss compared with a PCB phase shifter, can reduce the number of cavities, reduce the space required by installation, reduce the processing difficulty and cost and is convenient to install compared with the existing method of largely using a single independent phase shifter; and the phase-shifting medium sheet moves relative to the plurality of arc bending strip line groups simultaneously, and the consistency of each port can be improved.
Based on any of the above embodiments, the present invention further provides a base station antenna, including any of the above dielectric phase shifters.
It can be understood that the base station antenna provided by the invention comprises the dielectric phase shifter, and further comprises a feed network and a radiation unit of the base station, wherein the dielectric phase shifter is connected with the radiation unit through the feed network of the base station.
The base station antenna provided by the invention realizes the purposes of miniaturization and cost reduction by flexibly arranging the dielectric phase shifter with high integration level.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A dielectric phase shifter, comprising: cavity, PCB base plate, take tooth pull rod, gear medium and feed network, wherein:
the PCB substrate, the toothed pull rod, the gear medium and the feed network are all arranged in the cavity;
the gear medium comprises a plurality of phase-shifting medium sheets which are respectively and symmetrically connected along the upper surface and the lower surface of the PCB substrate, the upper surface and the lower surface of the PCB substrate are respectively provided with the toothed pull rod, the toothed pull rod drives the phase-shifting medium sheets to rotate, and the phase shifting is realized by combining the setting of the feed network.
2. The dielectric phase shifter of claim 1, wherein the cavity is a hexahedral single-layer structure, wherein:
the upper surface and the lower surface of the cavity are partially closed, a plurality of round copper holes are uniformly distributed along the periphery of the upper surface and the lower surface, and the round copper holes are used for welding cables;
the left and right parts of the cavity are partially closed, clamping grooves for mounting the PCB substrate are arranged along the inner sides of the left and right sides, and a plurality of circular openings are uniformly distributed along the outer sides of the left and right sides and used for inserting cables;
the front surface and the rear surface of the cavity are arranged in an open mode so that the toothed pull rod can slide.
3. The dielectric phase shifter as claimed in claim 1, wherein a strip-shaped groove is formed in a middle position of the PCB substrate along a long side direction, and the toothed pull rod is fixed on the PCB substrate through the strip-shaped groove and slides along the strip-shaped groove;
the PCB base plate is followed bar groove symmetry sets up four groups arc flutings, the gear medium passes through four groups arc flutings are fixed on the PCB base plate and rotate along the arc fluting.
4. The dielectric phase shifter of claim 3, wherein the toothed pull rod comprises a first toothed pull rod and a second toothed pull rod;
the first toothed pull rod is positioned on the upper surface of the PCB substrate, is fixed in the strip-shaped groove and is used for driving the gear medium positioned on the upper surface of the PCB substrate to rotate along the arc-shaped groove;
the second toothed pull rod is positioned on the lower surface of the PCB substrate, is fixed in the strip-shaped groove and is used for driving the gear medium positioned on the lower surface of the PCB substrate to rotate along the arc-shaped groove;
the first toothed pull rod penetrates through the strip-shaped groove through a male buckle convex structure, and is fixedly connected with the second toothed pull rod through a female buckle concave structure.
5. The dielectric phase shifter of claim 1, wherein the gear dielectric comprises four first phase shifting dielectric sheets and four second phase shifting dielectric sheets, and a single first phase shifting dielectric sheet and a single second phase shifting dielectric sheet are fastened and connected through an arc-shaped slot and rotate along the arc-shaped slot.
6. The dielectric phase shifter as recited in claim 5, wherein the gear dielectric is a circular shape with an outer edge in a gear shape, the circular shape includes four equally divided quarter circles, one set of the centrosymmetric quarter circles is hollowed out, and the other set of the centrosymmetric quarter circles is filled with the dielectric;
correspondingly, the medium filling part of the first phase-shifting medium piece is uniformly provided with a plurality of male buckle convex structures and a plurality of windowing structures, the medium filling part of the second phase-shifting medium piece is uniformly provided with a plurality of female buckle concave structures and a plurality of windowing structures, and the plurality of male buckle convex structures, the plurality of female buckle concave structures and the plurality of windowing structures are all linearly arranged.
7. The dielectric phase shifter of claim 1, wherein the feed network includes a plurality of phase shifting circuits and a plurality of functional circuits, the plurality of phase shifting circuits and the plurality of functional circuits being alternately electrically connected, a single phase shifting circuit being electrically connected to at least two functional circuits;
the phase shift circuits comprise a plurality of groups of double-layer arc strip lines which are concentric with the gear medium, when the gear medium slides on the phase shift circuits, the area of the medium covering the phase shift circuits is changed, and the length of the arc strip lines is changed to realize phase shift;
the functional circuits comprise strip line power dividers, matched impedances connected with the phase-shifting circuits and expansion circuits integrated based on preset requirements.
8. The dielectric phase shifter of claim 7, wherein the plurality of phase shift circuits are alternately arranged and linearly arranged, and each phase shift circuit is electrically connected to two adjacent functional circuits, so that the feed network has a single-layer structure.
9. The dielectric phase shifter of claim 7, wherein the plurality of phase shift circuits are stacked and staggered, and each phase shift circuit is electrically connected with two adjacent functional circuits, so that the feeding network has a double-layer structure.
10. A base station antenna comprising a dielectric phase shifter according to any one of claims 1 to 9.
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| CN113823884B (en) | 2022-07-19 |
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