Dielectric phase shifter and antenna
The dielectric phase shifter addresses coupling and signal integrity issues in MIMO antennas by integrating phase shifting and filtering, enhancing performance and reducing complexity and cost.
Patent Information
- Application Number
- PCT/CN2025/079619
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2024-03-29
- Filing Date
- 2025-02-27
- Publication Date
- 2025-10-02
AI Technical Summary
Conventional phase shifters for MIMO and massive MIMO antennas suffer from poor coupling consistency, signal loss, insertion loss, and lack of filtering capabilities, with a complex and costly assembly process, making them unsuitable for these applications.
A dielectric phase shifter with a movable dielectric member and metal transmission line within a shielding cavity, providing controllable phase shifting and integrated low-pass filtering, improving coupling consistency and reducing component count.
Enhances signal integrity and reduces complexity by integrating phase shifting and filtering in a single device, offering improved performance and cost-effectiveness for MIMO and massive MIMO antennas.
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Figure CN2025079619_02102025_PF_FP_ABST
Abstract
Description
DIELECTRIC PHASE SHIFTER AND ANTENNAFIELD
[0001] Embodiments of the present disclosure generally relate to the field of communication technology, and more particularly, to a dielectric phase shifter and an antenna comprising the same.BACKGROUND
[0002] With the continuous development of mobile communication networks, higher requirements have been put forward for the performance of the communication networks, such as transmission rate, stability, and system capacity. At present, 5th Generation Mobile Communication Technology (5G) communication network under continuous construction has gradually matured and been put into commercial use in a mobile communication base station as a main carrier for signal transmission and reception in communication. The performance of an antenna utilized in the base station directly affects the integrity of communication network energy and user perceptual experience, which plays a crucial role in the mobile communication networks.
[0003] In the mobile communication networks, an electric modulation antenna is key equipment for guaranteeing network coverage, and a phase shifter is a core electronic device of the electric modulation antenna. The phase shifter may adjust a phase distribution of each radiation element in a radiation array to change a main beam downdip angle of the antenna, so as to change radiation coverage range of the antenna and improve communication quality in a relevant area.
[0004] Multiple Input Multiple Output (MIMO) antennas and massive MIMO antennas with distributed migration configurations are currently widely applied in the mobile communication networks. Conventional phase shifters in the MIMO and massive MIMO antennas typically include a PCB coupled phase shifter or a PCB dielectric phase shifter. However, the coupling consistency of such phase shifters is relatively poor, and signal loss and insertion loss are introduced into the phase shifters, especially at higher frequencies, which may impact overall signal integrity and system performance of the MIMO and massive MIMO antennas. In addition, the assembling process of the conventional phase shifters is quite complicated and requires significant costs. Further, the conventional phase shifters have no filtering capabilities. Neither the conventional PCB coupled phase shifters, nor the PCB dielectric phase shifters are suitable for use in the MIMO and massive MIMO antennas.SUMMARY
[0005] Example embodiments of the present disclosure provide a dielectric phase shifter and an antenna comprising the same, to at least partially solve the problems mentioned above.
[0006] In a first aspect of the present disclosure, it is provided a dielectric phase shifter. The dielectric phase shifter comprises: a metal shield enclosing a shielding cavity; a metal transmission line arranged within the shielding cavity and fixed relative to the metal shield; and a dielectric member arranged within the shielding cavity and surrounding a portion of the metal transmission line, the dielectric member being movable relative to the metal transmission line in a predetermined direction, the dielectric member comprising a first dielectric part and a second dielectric part having a dielectric thickness larger than that of the first dielectric part, the first dielectric part and the second dielectric part being arranged side by side in the predetermined direction.
[0007] In some embodiments, the first dielectric part is in contact with the second dielectric part, or the first dielectric part is formed integrally with the second dielectric part.
[0008] In some embodiments, the first dielectric part comprises a first top plate arranged at a first side of the metal transmission line and a first bottom plate arranged at a second side of the metal transmission line opposite to the first side; the second dielectric part comprises a second top plate arranged at the first side of the metal transmission line and a second bottom plate arranged at the second side of the metal transmission line; and the second top plate is thicker than the first top plate and the second bottom plate is thicker than the first bottom plate.
[0009] In some embodiments, the first top plate is separated from the first bottom plate, or the first top plate is formed integrally with the first bottom plate; and the second top plate is separated from the second bottom plate, or the second top plate is formed integrally with the second bottom plate.
[0010] In some embodiments, the first dielectric part is provided with one or more pairs of through holes arranged near to an interface between the first dielectric part and the second dielectric part, and each pair of through holes are arranged at both sides of the metal transmission line.
[0011] In some embodiments, the portion of the metal transmission line surrounded by the dielectric member comprises a first narrowing part surrounded by the first dielectric part and having a width narrower than that of other parts of the metal transmission line connected to the first narrowing part, and the first narrowing part is arranged near to an interface between the first dielectric part and the second dielectric part.
[0012] In some embodiments, the metal transmission line comprises a meandering part surrounded by the dielectric member.
[0013] In some embodiments, the metal transmission line comprises: a first transmission segment arranged along the predetermined direction and partially surrounded by the dielectric member; and a second transmission segment connected to the first transmission segment and arranged outside the dielectric member, the second transmission segment comprising: a main part; a second narrowing part having a width narrower than that of the main part; one or more side branches each connected to the second narrowing part and having a width narrower than that of the main part; and one or more metal sheets each connected to a corresponding one of the one or more side branches.
[0014] In some embodiments, the main part of the second transmission segment is arranged along a direction perpendicular to the predetermined direction.
[0015] In some embodiments, the metal shield comprises a substrate supporting the metal transmission line via a dielectric support and a shielding cover coupled to the substrate, and the shielding cavity is enclosed by the substrate and the shielding cover.
[0016] In a second aspect of the present disclosure, it is provided an antenna comprising: a radiation array; a dielectric phase shifter of the first aspect of the present disclosure, the dielectric phase shifter being connected to the radiation array to control phase shifting of a signal received from the radiation array or to be transmitted by the radiation array; and a power division network connected to the dielectric phase shifter.
[0017] According to embodiments of the present disclosure, due to the influence of the dielectric member on the metal transmission line, the dielectric phase shifter may introduce controllable phase shifting in the signal received from the radiation array or to be transmitted by the radiation array. Since the dielectric thickness of the second dielectric part is larger than that of the first dielectric part, the dielectric phase shifter can achieve high coupling consistency within the whole frequency band. In addition, according to embodiments of the present disclosure, phase shifting and low-pass filtering may be achieved simultaneously in a single device, thereby reducing component count, obtaining a compact form factor, and improving the signal integrity.DESCRIPTION OF DRAWINGS
[0018] Through the following detailed descriptions with reference to the accompanying drawings, the above and other objectives, features and advantages of the example embodiments disclosed herein will become more comprehensible. In the drawings, several example embodiments disclosed herein will be illustrated in an example and in a non-limiting manner, wherein:
[0019] FIG. 1 is a schematic diagram of a dielectric phase shifter according to an embodiment of the present disclosure;
[0020] FIG. 2 is a schematic diagram of an antenna according to an embodiment of the present disclosure;
[0021] FIG. 3 is a graph illustrating phase shifts of the dielectric phase shifter according to an embodiment of the present disclosure;
[0022] FIG. 4 is a graph illustrating return loss of the signal according to an embodiment of the present disclosure; and
[0023] FIG. 5 is a graph illustrating filtering performance of the dielectric phase shifter.
[0024] Throughout the drawings, the same or similar reference symbols are used to indicate the same or similar elements. DETAILED DESCRIPTION OF EMBODIMETNS
[0025] Principles of the present disclosure will now be described with reference to several example embodiments shown in the drawings. Though example embodiments of the present disclosure are illustrated in the drawings, it is to be understood that the embodiments are described only to facilitate those skilled in the art in better understanding and thereby achieving the present disclosure, rather than to limit the scope of the disclosure in any manner.
[0026] The term “comprises” or “includes” and its variants are to be read as open terms that mean “includes, but is not limited to. ” The term “or” is to be read as “and / or” unless the context clearly indicates otherwise. The term “based on” is to be read as “based at least in part on. ” The term “being operable to” is to mean a function, an action, a motion or a state can be achieved by an operation induced by a user or an external mechanism. The term “one embodiment” and “an embodiment” are to be read as “at least one embodiment. ” The term “another embodiment” is to be read as “at least one other embodiment. ” The terms “first, ” “second, ” and the like may refer to different or same objects. Other definitions, explicit and implicit, may be included below. A definition of a term is consistent throughout the description unless the context clearly indicates otherwise.
[0027] As mentioned above briefly, the coupling consistency of the conventional phase shifters is relatively poor, and signal loss and insertion loss are introduced into the phase shifters, especially at higher frequencies, which may impact overall signal integrity and system performance of the MIMO and massive MIMO antennas. In addition, the assembling process of the conventional phase shifters is quite complicated and requires significant costs. Further, the conventional phase shifters have no filtering capabilities. Neither the conventional PCB coupled phase shifters, nor the PCB dielectric phase shifters are suitable for use in the MIMO and massive MIMO antennas.
[0028] Embodiments of the present disclosure provide a dielectric phase shifter to improve the coupling consistency within the whole frequency band of the antenna and the signal integrity, and reduce the component count and the form factor, such that the dielectric phase shifter is suitable for use in the MIMO and massive MIMO antennas. Embodiments of the present disclosure provides a higher integration solution with better performance and smaller size for products.
[0029] FIG. 1 is a schematic diagram of a dielectric phase shifter according to an embodiment of the present disclosure. As shown in FIG. 1, the dielectric phase shifter 100 described herein generally includes a metal shield 110, a metal transmission line 120, and a dielectric member 130. The metal transmission line 120 and the dielectric member 130 are arranged in the metal shield 110.
[0030] As shown in FIG. 1, the metal shield 110 encloses a shielding cavity 111. The metal transmission line 120 and the dielectric member 130 are arranged within the shielding cavity 111. The metal transmission line 120 is fixed relative to the metal shield 110, and both sides of the metal transmission line 120 are air. The metal transmission line 120 have a first port 121 and a second port 122. One of the first and second ports 121, 122 may be used as an input port, and the other one of the first and second ports 121, 122 may be used as an output port. Depending on signal transmission and reception, the input port and the output port may be exchanged.
[0031] In some embodiments, the metal transmission line 120 may be made from a metal plate. In some embodiments, the metal transmission line 120 may be formed on a printed circuit board (PCB) . In some embodiments, the metal transmission line 120 may be formed on a plastic substrate. In other embodiments, the metal transmission line 120 may also be supported by any other appropriate dielectric materials, such as ceramic and glass. Embodiments of the present disclosure is not intended to be limited in this respect.
[0032] The dielectric member 130 is movable relative to the metal transmission line 120 in a predetermined direction X. The dielectric member 130 has a dielectric constant higher than air. During movement of the dielectric member 130 relative to the metal transmission line 120, an impedance of the metal transmission line 120 may be changed, such that a propagation velocity of RF signals in the metal transmission line 120 is changed. In this way, the phase of the signal transmitted in the metal transmission line 120 can be shifted.
[0033] In embodiments of the present disclosure, depending on an extension direction of the metal transmission line 120, the metal shield 110 may have any appropriate structure.
[0034] In some embodiments, as shown in FIG. 1, the metal transmission line 120 may include a first transmission segment 123 and a second transmission segment 124. The first transmission segment 123 is arranged along the predetermined direction X and partially surrounded by the dielectric member 130. The second transmission segment 124 is connected to the first transmission segment 123 and arranged outside the dielectric member 130. The second transmission segment 124 may extend in a direction substantially perpendicular to the predetermined direction X. Accordingly, the metal shield 110 may include a first portion 114 and a second portion 115 connected to each other. An internal space of the first portion 114 is in communication with that of the second portion 115. The internal spaces of the first portion 114 and the second portion 115 constitute the shielding cavity 111. The first transmission segment 123 is arranged in the first portion 114 of the metal shield 110 and the second transmission segment 124 is arranged in the second portion 115 of the metal shield 110. The dielectric member 130 is arranged in the first portion 114 of the metal shield 110 and may move along the first portion 114.
[0035] Alternatively, in some embodiments, each of the metal transmission line 120 and the metal shield 110 may generally extend in the predetermined direction X. In some embodiments, each of the metal transmission line 120 and the metal shield 110 may be generally in a U shape. Depending on the shape of the metal transmission line 120, the metal shield 110 may have any appropriate shape.
[0036] In some embodiments, the metal transmission line 120 may a straight line, a U-shaped line, a S-shaped line, or various other forms. The shape of the metal transmission line 120 is not intended to be limited in embodiments of the present disclosure. Similarly, the shape of the metal shield 110 is not intended to be limited in embodiments of the present disclosure, as long as the metal shield 110 may form the shielding cavity 111.
[0037] In some embodiments, as shown in FIG. 1, the metal shield 110 may include a substrate 112 supporting the metal transmission line 120 via a dielectric support (not shown) and a shielding cover 113 coupled to the substrate 112. The shielding cavity 111 is enclosed by the substrate 112 and the shielding cover 113. The dielectric support may include a screw or any appropriate type of fasteners. It is to be understood that the metal shield 110 may have any appropriate structure according to design requirements, so as to accommodate the metal transmission line 120 and the dielectric member 130.
[0038] In some embodiments, the metal shield 110 may be an independent component formed from metal. In some embodiments, the metal shield 110 may be formed from a coating layer on a nonmetal component. It is to be noted that the metal shield 110 may be formed in any appropriate manners.
[0039] As shown in FIG. 1, the dielectric member 130 surrounds a portion of the first transmission segment 123 of the metal transmission line 120. The dielectric member 130 includes a first dielectric part 131 and a second dielectric part 132 having a dielectric thickness larger than that of the first dielectric part 131. The first dielectric part 131 and the second dielectric part 132 may have substantially the same width. The first dielectric part 131 and the second dielectric part 132 are arranged side by side in the predetermined direction X. During movement of the dielectric member 130 relative to the metal transmission line 120, the first dielectric part 131 and the second dielectric part 132 may move simultaneously, to change the impedance of the metal transmission line 120. Due to that the dielectric thickness of the first dielectric part 131 is less than that of the second dielectric part 132, the coupling consistency within the whole frequency band of the antenna may be improved.
[0040] In some embodiments, the first dielectric part 131 may be formed integrally with the second dielectric part 132, and the dielectric part 131 is thinned with respect to the second dielectric part 132. In some embodiments, the first dielectric part 131 and the second dielectric part 132 may be separate parts and the first dielectric part 131 may be in intimate contact with the second dielectric part 132. In some embodiments, the first dielectric part 131 may further divided into more subparts in intimate contact with each other. In some embodiments, the second dielectric part 132 may further divided into more subparts in intimate contact with each other.
[0041] In some embodiments, the first dielectric part 131 may include a first top plate 1311 arranged at a first side of the metal transmission line 120 and a first bottom plate 1312 arranged at a second side of the metal transmission line 120 opposite to the first side. The first top plate 1311 and the first bottom plate 1312 may have substantially the same thickness. Similarly, the second dielectric part 132 may include a second top plate 1321 arranged at the first side of the metal transmission line 120 and a second bottom plate 1322 arranged at the second side of the metal transmission line 120. The second top plate 1321 and the second bottom plate 1322 may have substantially the same thickness. The second top plate 1321 is thicker than the first top plate 1311 and the second bottom plate 1322 is thicker than the first bottom plate 1312.
[0042] In some embodiments, the first top plate 1311 may be separated from the first bottom plate 1312, and a gap is provided between the first top plate 1311 and the first bottom plate 1312 at lateral sides of the first transmission segment 123 of the metal transmission line 120. In some embodiments, the first top plate 1311 may be formed integrally with the first bottom plate 1312, and the lateral sides of the metal transmission line 120 is surrounded by the dielectric member 130.
[0043] In some embodiments, the second top plate 1321 may be separated from the second bottom plate 1322, and a gap is provided between the second top plate 1321 and the second bottom plate 1322 at lateral sides of the first transmission segment 123 of the metal transmission line 120. In some embodiments, in a case that the metal transmission line 120 is formed on both sides of a carrier board, the metal transmission line 120 on both sides may be connected to each other through vias in the carrier board. In this case, the phase shifting may also be achieved through only moving one of the second top plate 1321 and the second bottom plate 1322.
[0044] In some embodiments, the second top plate 1321 may be formed integrally with the second bottom plate 1322, and the lateral sides of the metal transmission line 120 is surrounded by the dielectric member 130.
[0045] In some embodiments, as shown in FIG. 1, the first dielectric part 131 may be provided with a pair of through holes 140 arranged near to an interface between the first dielectric part 131 and the second dielectric part 132. A first through hole of the pair of through holes 140 is arranged at a side of the metal transmission line 120. For example, the first through hole may be disposed on the first top plate 1311. A second through hole of the pair of through holes 140 is arranged at an opposite side of the metal transmission line 120. For example, the second through hole may be disposed on the first bottom plate 1312. Through providing the through holes 140 on the first dielectric part 131, the impendence of the metal transmission line 120 may be changed. Specifically, a portion of the first transmission segment 123 surrounded by the through holes 140 has a high impendence, and other portions of the first transmission segment 123 of the metal transmission line 120 surrounded by other portions of the first dielectric part 131 have low impendences. The through holes 140 are used to achieve smooth out-of-band stray suppression by adding a high-impedance structure between the two low-impedance structures. In this way, low-pass filtering may be achieved simultaneously in the dielectric phase shifter 100, attenuating frequencies above a certain cutoff frequency.
[0046] The dielectric phase shifter 100 with integrated low-pass filtering function may result in controllable phase shifts, simplification of system design, improved signal quality, and potential cost saving, such that it is an attractive solution for various RF / microwave applications.
[0047] Alternatively or additionally, the first dielectric part 131 may be provided with more pairs of through holes 140 arranged near to an interface between the first dielectric part 131 and the second dielectric part 132. In this way, the low-pass filtering may also be achieved.
[0048] Alternatively, in some embodiments, the portion of the metal transmission line 120 surrounded by the dielectric member 130 may include a first narrowing part surrounded by the first dielectric part 131 and having a width narrower than that of other parts of the metal transmission line 120 connected to the first narrowing part. The first narrowing part may be arranged near to an interface between the first dielectric part 131 and the second dielectric part 132. With such an arrangement, low-pass filtering may also be achieved simultaneously in the dielectric phase shifter 100.
[0049] In some embodiments, as shown in FIG. 1, the metal transmission line 120 may include a meandering part 1231 surrounded by the dielectric member 130. With such an arrangement, a length of the metal transmission line 120 may be increased, saving space of the dielectric phase shifter 100.
[0050] In some embodiments, as shown in FIG. 1, the second transmission segment 124 may include a main part 1241, a second narrowing part 1242, one or more side branches 1243, and one or more metal sheets 1244. The second narrowing part 1242 has a width narrower than that of the main part 1241. Each of the side branches 1243 is connected to the second narrowing part 1242 and has a width narrower than that of the main part 1241. Each of the metal sheets 1244 is connected to a corresponding one of the one or more side branches 1243. With such an arrangement, a high-low impedance change may be introduced into the second transmission segment 124 to achieve an elliptic function low-pass effect. In this way, the dielectric phase shifter 100 may further perform low-pass filtering on the signal transmitted by the metal transmission line 120, achieving steep suppression out of band, so as to better suppress stray signals brought by the antenna. In addition, such an arrangement of the second transmission segment 124 may also suppress stray signals brought by other electronic devices, such as a power amplifier, and a system noise.
[0051] In some embodiments, the width of the second transmission segment 124 may be adjusted so as to match transmission and reflection performance of the dielectric phase shifter 100 within the entire passband.
[0052] In some embodiments, as shown in FIG. 1, the main part 1241 of the second transmission segment 124 may be arranged along a direction perpendicular to the predetermined direction X.
[0053] FIG. 2 is a schematic diagram of an antenna according to an embodiment of the present disclosure. As shown in FIG. 2, the antenna 200 includes a radiation array 210 and a dielectric phase shifter 100. The dielectric phase shifter 100 is connected to the radiation array 210 to control phase shifting of a signal received from the radiation array 210 or to be transmitted by the radiation array 210. The dielectric phase shifter 100 may have any configuration described above with reference to FIG. 1. The dielectric phase shifter 100 may be connected to a port which is in turn connected to a power division network (not shown) . The power division network may be arranged on the back of the metal shield 110. As shown in FIG. 2, the antenna 200 may include a plurality of radiation arrays 210 each connected to a corresponding dielectric phase shifter 100. The antenna 200 may be a MIMO antenna, a massive MIMO antenna, or any other appropriate type of antennas.
[0054] FIG. 3 is a graph illustrating phase shifts of the dielectric phase shifter according to an embodiment of the present disclosure. As shown in FIG. 3, during movement of the dielectric member 130 relative to the metal transmission line 120, the phase of the signal transmitted in the metal transmission line 120 can be shifted.
[0055] FIG. 4 is a graph illustrating return loss of the signal according to an embodiment of the present disclosure. As shown in FIG. 4, the return loss are suppressed by the dielectric phase shifter.
[0056] FIG. 5 is a graph illustrating filtering performance of the dielectric phase shifter. As shown in FIG. 5, high frequency components of the RF signals can be attenuated by the dielectric phase shifter.
[0057] According to embodiments of the present disclosure, due to the combination of the phase shifting and low-pass filtering functions, the need for separate components for phase shifting and low-pass filtering is eliminated, such that the component count is reduced. The reduction of the component count may simplify system design, save space, and lead to lower manufacturing costs.
[0058] In addition, integration of phase shifting and low-pass filtering into a single device results in a more compact and space-efficient solution. This is particularly valuable in applications where space constraints are a concern, such as in compact electronic systems, phased array antennas, and miniaturized RF / microwave modules.
[0059] Further, the integrated low-pass filtering function helps attenuating higher frequency components of the RF signals, thereby reducing the potential for out-of-band interference and noise. This can contribute to improved signal-to-noise ratio, better spectral purity, and enhanced overall signal integrity in the antenna system.
[0060] Further, integration of the phase shifting and low-pass filtering in a single device simplifies the overall system design and integration process. It reduces the complexity of interconnecting multiple discrete components and streamlines the signal path, potentially leading to improved system performance and reliability.
[0061] Further, the combined functionality of phase shifting and low-pass filtering allows for adjusting the frequency response of the device to meet specific system requirements. This flexibility in frequency response can be advantageous in applications where precise control over the spectral content of the RF signals is needed.
[0062] Further, integrating multiple functions into a single device can result in cost savings in terms of component procurement, assembly, and testing. Additionally, the streamlined design and reduced complexity may lead to potential cost savings in system integration and maintenance.
[0063] Further, the dielectric phase shifter with low-pass filtering function can be applied in a wide range of range of RF / microwave system, including phase array antennas, radar system, communication networks, and test and measurement equipment. Versatility and combined functionality of the dielectric phase shifter make it suitable for diverse applications.
[0064] It should be appreciated that the above detailed embodiments of the present disclosure are only to exemplify or explain principles of the present disclosure and not to limit the present disclosure. Therefore, any modifications, equivalent alternatives and improvement, etc. without departing from the spirit and scope of the present disclosure shall be included in the scope of protection of the present disclosure. Meanwhile, appended claims of the present disclosure aim to cover all the variations and modifications falling under the scope and boundary of the claims or equivalents of the scope and boundary.
Claims
1.A dielectric phase shifter (100) comprising:a metal shield (110) enclosing a shielding cavity (111) ;a metal transmission line (120) arranged within the shielding cavity (111) and fixed relative to the metal shield (110) ; anda dielectric member (130) arranged within the shielding cavity (111) and surrounding a portion of the metal transmission line (120) , the dielectric member (130) being movable relative to the metal transmission line (120) in a predetermined direction (X) , the dielectric member (130) comprising a first dielectric part (131) and a second dielectric part (132) having a dielectric thickness larger than that of the first dielectric part (131) , the first dielectric part (131) and the second dielectric part (132) being arranged side by side in the predetermined direction (X) .2.The dielectric phase shifter (100) according to claim 1, wherein the first dielectric part (131) is in contact with the second dielectric part (132) , or the first dielectric part (131) is formed integrally with the second dielectric part (132) .3.The dielectric phase shifter (100) according to claim 1, wherein the first dielectric part (131) comprises a first top plate (1311) arranged at a first side of the metal transmission line (120) and a first bottom plate (1312) arranged at a second side of the metal transmission line (120) opposite to the first side;wherein the second dielectric part (132) comprises a second top plate (1321) arranged at the first side of the metal transmission line (120) and a second bottom plate (1322) arranged at the second side of the metal transmission line (120) ; andwherein the second top plate (1321) is thicker than the first top plate (1311) and the second bottom plate (1322) is thicker than the first bottom plate (1312) .4.The dielectric phase shifter (100) according to claim 2, wherein the first top plate (1311) is separated from the first bottom plate (1312) , or the first top plate (1311) is formed integrally with the first bottom plate (1312) ; andwherein the second top plate (1321) is separated from the second bottom plate (1322) , or the second top plate (1321) is formed integrally with the second bottom plate (1322) .5.The dielectric phase shifter (100) according to any of claims 1-4, wherein the first dielectric part (131) is provided with one or more pairs of through holes (140) arranged near to an interface between the first dielectric part (131) and the second dielectric part (132) , and each pair of through holes (140) are arranged at both sides of the metal transmission line (120) .6.The dielectric phase shifter (100) according to any of claims 1-4, wherein the portion of the metal transmission line (120) surrounded by the dielectric member (130) comprises a first narrowing part surrounded by the first dielectric part (131) and having a width narrower than that of other parts of the metal transmission line (120) connected to the first narrowing part, and the first narrowing part is arranged near to an interface between the first dielectric part (131) and the second dielectric part (132) .7.The dielectric phase shifter (100) according to any of claims 1-6, wherein the metal transmission line (120) comprises a meandering part (1231) surrounded by the dielectric member (130) .8.The dielectric phase shifter (100) according to any of claims 1-7, wherein the metal transmission line (120) comprises:a first transmission segment (123) arranged along the predetermined direction (X) and partially surrounded by the dielectric member (130) ; anda second transmission segment (124) connected to the first transmission segment (123) and arranged outside the dielectric member (130) , the second transmission segment (124) comprising:a main part (1241) ;a second narrowing part (1242) having a width narrower than that of the main part (1241) ;one or more side branches (1243) each connected to the second narrowing part (1242) and having a width narrower than that of the main part (1241) ; andone or more metal sheets (1244) each connected to a corresponding one of the one or more side branches (1243) .9.The dielectric phase shifter (100) according to claim 8, wherein the main part (1241) of the second transmission segment (124) is arranged along a direction perpendicular to the predetermined direction (X) .10.The dielectric phase shifter (100) according to any of claims 1-9, wherein the metal shield (110) comprises a substrate (112) supporting the metal transmission line (120) via a dielectric support and a shielding cover (113) coupled to the substrate (112) , and the shielding cavity (111) is enclosed by the substrate (112) and the shielding cover (113) .11.An antenna (200) comprising:a radiation array (210) ;a dielectric phase shifter (100) according to any of claims 1-10, the dielectric phase shifter (100) being connected to the radiation array (210) to control phase shifting of a signal received from the radiation array (210) or to be transmitted by the radiation array (210) ; anda power division network connected to the dielectric phase shifter (100) .
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