阅读说明：本技术 移相装置、天线及基站 (Phase shifting device, antenna and base station ) 是由 任驰 苏国生 薛锋章 于 2021-11-08 设计创作，主要内容包括：本发明提供了一种移相装置、天线及基站,所述移相装置包括移相器与介质板,该介质板的正面设有接地层,所述移相器包括两个固定传输线及耦合导通所述两个固定传输线的活动传输线,所述固定传输线被悬空支撑于所述接地层上方,且每个固定传输线的信号连接端口均延伸并形成于所述介质板的反面。本发明的移相装置通过将移相器的固定传输线悬空设置,固定传输线不与介质板相接触,使得固定传输线上下两侧均为对移相性能影响较小的空气介质,以提高移相器的相位一致性,降低了损耗,增强了移相装置的移相性能。(The invention provides a phase shifting device, an antenna and a base station, wherein the phase shifting device comprises a phase shifter and a dielectric slab, the front surface of the dielectric slab is provided with a ground layer, the phase shifter comprises two fixed transmission lines and a movable transmission line which couples and conducts the two fixed transmission lines, the fixed transmission lines are suspended and supported above the ground layer, and a signal connection port of each fixed transmission line extends and is formed on the back surface of the dielectric slab. According to the phase shifting device, the fixed transmission line of the phase shifter is arranged in a suspended mode, and the fixed transmission line is not in contact with the dielectric slab, so that the upper side and the lower side of the fixed transmission line are both air dielectrics with small influence on the phase shifting performance, the phase consistency of the phase shifter is improved, the loss is reduced, and the phase shifting performance of the phase shifting device is enhanced.)

1. A phase shifting device, characterized by: the phase shifter comprises a phase shifter and a dielectric slab, wherein a ground layer is arranged on the front surface of the dielectric slab, the phase shifter comprises two fixed transmission lines and a movable transmission line which is coupled and conducted with the two fixed transmission lines, the fixed transmission lines are suspended and supported above the ground layer, and a signal connection port of each fixed transmission line extends and is formed on the back surface of the dielectric slab.

2. The phase shifting device of claim 1, wherein each fixed transmission line is bent at both ends to form a pin, and the pins extend through the openings of the ground plane and the dielectric plate to the opposite side of the dielectric plate, respectively, one of the pins forming the signal connection port.

3. The phase shifting apparatus of claim 1, wherein each fixed transmission line comprises two parallel strips and side strips connecting the two parallel strips in a lengthwise direction to form sliding grooves for receiving the movable transmission lines.

4. The phase shifting apparatus of claim 3, wherein the side sideband is disposed on a side of its fixed transmission line adjacent to another fixed transmission line.

5. The phase shifting apparatus of claim 1, wherein each fixed transmission line comprises two parallel strips and side strips connecting the two parallel strips at either end of the parallel strips to form a sliding channel for receiving the movable transmission line.

6. The phase shifting apparatus of claim 1, wherein the two fixed transmission lines are arranged side by side in parallel.

7. The phase shifting apparatus of claim 1, wherein the movable transmission line comprises a pair of connected movable branches, and the two movable branches are coupled to the two fixed transmission lines, respectively.

8. The phase shifting apparatus of claim 7, wherein the phase shifter further comprises a movable dielectric plate, the movable transmission line is disposed on one side of the movable dielectric plate, or two movable transmission lines are disposed on two sides of the movable dielectric plate respectively.

9. The phase shifting device of any one of claims 1 to 8, wherein the pins are in a pillar or sheet configuration to support the fixed transmission line above the ground plane.

10. The phase shifting apparatus of any one of claims 1 to 8, wherein a plurality of dielectric support members are disposed between the fixed transmission line and the ground layer for supporting the fixed transmission line.

11. The phase shifting apparatus according to any one of claims 1 to 8, further comprising a shield case for covering the phase shifter and being in conduction with the ground layer.

12. The phase shifting apparatus of claim 11, wherein the shielding case is provided with support bands for supporting the fixed transmission lines, the support bands being fixed to both sides of the shielding case and supporting the fixed transmission lines.

13. An antenna comprising a power splitting network for feeding a plurality of radiating elements of a same array in parallel, characterized in that: the power distribution network comprises at least one phase shifting device according to any one of claims 1 to 12, the phase shifting device is configured to control the phase shifting of a polarized signal of the array, and two signals with different phases output after the phase shifting are respectively transmitted to corresponding radiation units.

14. A base station, characterized in that it comprises an antenna according to claim 13.

Technical Field

The invention belongs to the technical field of mobile communication, and particularly relates to a phase shifting device, an antenna provided with the phase shifting device and a base station provided with the antenna.

Background

With the continuous development of mobile communication networks, users have higher requirements on the performances of the mobile communication networks, such as transmission delay, transmission rate, stability, system capacity and the like, and a fifth generation mobile communication network is produced. At present, a continuously-built 5G communication network is gradually mature and put into commercial use, and a mobile communication base station antenna is used as a main carrier for signal receiving and transmitting in communication, so that the performance of the mobile communication base station antenna directly influences the overall performance of the communication network and the perception experience of users, and plays a crucial role in the mobile communication network.

In a mobile communication network, an antenna is a key device for network coverage, and a phase shifter is a core device of an electric tuning antenna. The antenna adjusts the phase distribution of each radiating element in the radiating array through the phase shifter to change the downward inclination angle of the main beam of the antenna, thereby changing the radiation coverage of the antenna and improving the communication quality in the area.

The gain of the antenna is an important index of the working performance of the antenna, the gain of the antenna is related to the working efficiency of the antenna, the efficiency of the antenna is inseparable from the loss of each part of the antenna, and the loss of the phase shifter serving as an important part of the antenna is also a continuous concern of those in the industry.

At present, the conventional U-shaped phase shifter is mainly used in the industry, but the loss of the conventional U-shaped phase shifter is large, and the antenna gain is greatly reduced. Therefore, the industry provides improved methods for loading a metal large cavity covering the U-shaped phase shifter, changing microstrip line coupling into strip line coupling, reducing the up-down jitter amplitude of a movable transmission line and the like, so as to reduce the loss of the U-shaped phase shifter.

However, the coupling structure formed by the movable transmission line and the fixed transmission line of the U-shaped phase shifter is also affected by the dielectric substrate for supporting the U-shaped phase shifter, so that even if the movable transmission line has slight jitter, the phase of the phase shifter is greatly affected, the phase consistency is deteriorated, and the loss of the phase shifter is increased.

Disclosure of Invention

It is a primary objective of the present invention to solve at least one of the above problems and to provide a phase shifting apparatus, an antenna and a base station

In order to meet various purposes of the invention, the invention adopts the following technical scheme:

the phase shifter comprises a phase shifter and a dielectric plate, wherein the front surface of the dielectric plate is provided with a ground layer, the phase shifter comprises two fixed transmission lines and a movable transmission line for coupling and conducting the two fixed transmission lines,

the fixed transmission lines are suspended and supported above the grounding layer, and the signal connection port of each fixed transmission line extends and is formed on the reverse side of the dielectric plate.

Furthermore, two ends of each fixed transmission line are bent to form a plug pin, the plug pins respectively penetrate through the ground layer and the holes in the dielectric plate and extend to the back surface of the dielectric plate, and one of the plug pins forms the signal connection port.

Furthermore, each fixed transmission line comprises two parallel strips and side strips connecting the two parallel strips along the longitudinal direction to form a sliding groove, and the sliding groove is used for accommodating the movable transmission line.

Specifically, the side strip is arranged on one side of the fixed transmission line close to the other fixed transmission line.

Specifically, each fixed transmission line comprises two parallel strips and a side band connecting the two parallel strips with any end of the parallel strips to form a sliding groove, and the sliding groove is used for accommodating the movable transmission line.

Specifically, the two fixed transmission lines are arranged in parallel.

Specifically, the movable transmission line comprises a pair of connected movable branches, and the two movable branches are respectively coupled with the two fixed transmission lines.

Specifically, the phase shifter is further provided with a movable dielectric plate, the movable transmission line is arranged on one side of the movable dielectric plate, or two movable transmission lines are respectively arranged on two sides of the movable dielectric plate.

Preferably, the pin is a column structure or a sheet structure to support the fixed transmission line above the ground plane.

Preferably, a plurality of dielectric supporting pieces for supporting the fixed transmission line are arranged between the fixed transmission line and the ground layer.

Furthermore, the phase shifter further comprises a shielding case, and the shielding case is used for covering the phase shifter and is communicated with the ground layer.

Preferably, the shielding case is provided with a supporting belt for supporting the fixed transmission line, the supporting belt is fixed on two side edges of the shielding case and is used for supporting the fixed transmission line.

The invention provides an antenna suitable for one of the purposes of the invention, which comprises a power distribution network used for feeding a plurality of radiation units in the same array in parallel, wherein the power distribution network comprises at least one phase shifting device, the phase shifting device is used for controlling the phase shifting of a polarized signal of the array, and two paths of signals with different phases output after the phase shifting are respectively transmitted to the corresponding radiation units.

The base station comprises the antenna.

Compared with the prior art, the invention has the following advantages:

firstly, the fixed transmission line of the phase shifting device is suspended above the grounding layer, so that both sides of the fixed transmission line are air media, and the phase consistency of the phase shifting device is improved; the phase-shifting device can not be different from the traditional phase-shifting device in terms of dielectric materials on two sides of a fixed transmission line, so that the phase consistency is poor, and the phase-shifting performance of the phase-shifting device is influenced. That is, when the movable transmission line of the phase shift device of the present invention fluctuates up and down by the same amplitude as the movable transmission line of the conventional phase shift device, the phase shift device of the present invention has a phase change much smaller than that of the conventional phase shift device.

Secondly, the fixed transmission line of the phase shifting device is suspended above the grounding layer, air mediums are arranged on two sides of the fixed transmission line, and the influence of the air mediums on the loss of the phase shifting device is far smaller than the influence of the loss of the fixed transmission line of the traditional phase shifting device attached to a medium plate, so that the phase shifting device can reduce the loss of the phase shifting device and improve the phase shifting performance.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

The foregoing and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic structural diagram of a phase shift device according to an embodiment of the present invention.

FIG. 2 is a side view of a phase shifting device according to an embodiment of the present invention.

Fig. 3 is a schematic structural view of a fixed transmission line of a phase shift device according to an embodiment of the present invention.

Fig. 4 is a top view of the movable transmission line and the movable dielectric plate of the phase shift device according to the embodiment of the present invention.

Fig. 5 is a schematic structural diagram of a phase shifting device according to another embodiment of the present invention.

FIG. 6 is a graph showing a loss comparison between a conventional phase shift device and a phase shift device using the phase shift device of the present invention when tested.

FIG. 7 is a graph showing phase fluctuation curves of the movable transmission line of the phase shift device, which is not shifted, shifted upward by 0.1mm, and shifted downward by 0.1mm, when the phase shift device of the present invention is used in the test.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below by referring to the drawings are exemplary only for the purpose of illustrating the present invention and are not to be construed as limiting the present invention.

As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may also be present. Further, "connected" or "coupled" as used herein may include wirelessly connected or wirelessly coupled. As used herein, the term "and/or" includes all or any element and all combinations of one or more of the associated listed items.

It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

The invention provides a phase shifter, wherein a phase shifter of the phase shifter is arranged above a ground layer, so that the phase shifter is not influenced by a dielectric plate, the phase shifter keeps good phase consistency and reduces loss.

In an exemplary embodiment of the present invention, referring to fig. 1, the phase shifting device 10 includes a phase shifter 20 and a dielectric board 30, the phase shifter 20 is disposed above a ground layer 31 on the dielectric board 30 in a floating manner, and the ground layer 31 is disposed on a front surface of the dielectric board 30.

The phase shifter 20 includes two fixed transmission lines 21 and a movable transmission line 22, and the movable transmission line 22 is coupled to the two fixed transmission lines 21. The fixed transmission line 21 is supported and suspended above the ground layer 31, and the signal connection port 221 of the fixed transmission line 21 extends to the reverse side of the dielectric board 30.

Specifically, the fixed transmission line 21 is disposed parallel to the ground layer 31, the two fixed transmission lines 21 are disposed parallel to each other, and the two fixed transmission lines 21 have the same structure.

Referring to fig. 2, two ends of the fixed transmission line 21 are bent to form the plug pins 22, the two plug pins 22 are used for supporting the fixed transmission line 21, the fixed transmission line 21 can be suspended above the ground layer 31, and a space is provided between the fixed transmission line 21 and the ground layer 31, so that the fixed transmission line 21 does not contact the ground layer 31. Both sides of the fixed transmission line 21 are not in contact with the ground layer 31 or the dielectric slab 30, and the fixed transmission line 21 is arranged in a suspended manner, that is, both sides of the fixed transmission line 21 are air dielectrics, and both sides of the fixed transmission line 21 are air dielectrics, so that the phase consistency of the phase shifter 20 is improved, and the air dielectrics have less influence on the phase shifting performance of the phase shifting device 10, thereby reducing the loss of the phase shifter 20 and improving the phase shifting performance of the phase shifter 20; and traditional phase shifter sets up on the dielectric-slab, and traditional fixed transmission line one side that moves the phase shifter contacts with the dielectric-slab, and the opposite side is air dielectric, leads to the dielectric material difference of the both sides of fixed transmission line, and one side dielectric material one side air dielectric for the phase consistency of moving the phase shifter is poor, and dielectric material seriously influences the loss that moves the phase shifter, has greatly influenced traditional moving the phase performance that moves the phase shifter. Preferably, the spacing between the fixed transmission line 21 and the ground plane 31 is between 0.5 and 4mm, preferably 1 mm.

The ground layer 31 is used to isolate the influence of the dielectric material of the dielectric plate 30 on the fixed transmission line 21, further improve the phase consistency at two sides of the fixed transmission line 21, reduce the loss, and improve the phase shifting performance.

Referring to fig. 2, the plug pins 22 may penetrate through the ground layer 31 and the dielectric board 30, so that the plug pins 22 may extend to the opposite side of the dielectric board 30, thereby forming the signal connection ports 221 of the fixed transmission lines 21 on the opposite side of the dielectric board 30. The fixed transmission line 21 has two pins 22, and one or both of the two signal pins 22 may form a signal connection port 221 on the opposite side of the dielectric board 30. When one of the pins 22 of the fixed transmission line 21 extends to the opposite side of the dielectric board 30 to form a signal connection port 221, the signal connection port 221 may be a signal input port or a signal output port. When the two pins 22 of the fixed transmission line 21 extend to the opposite side of the dielectric board 30 to form the signal connection ports 221, the two signal connection ports 221 are respectively a signal input port and a signal output port. The ground layer 31 and the dielectric plate 30 are provided with through holes for the insertion pins 22 to pass through, corresponding to the insertion pins 22.

In one embodiment, the plug pins 22 are of a column structure or a sheet structure, and the plug pins 22 are inserted into the opposite side of the dielectric board 30 through the ground layer 31 and the dielectric board 30, so as to support the fixed transmission line 21 on the ground layer 31 and prevent the fixed transmission line 21 from contacting the ground layer 31.

In one embodiment, a plurality of dielectric supporting members for supporting the fixed transmission line are disposed between the fixed transmission line and the ground layer. The dielectric support piece is made of an insulating material so as to avoid influencing the electrical performance of the fixed transmission line, and preferably, the dielectric support piece is made of a plastic material. The medium supporting piece is of a sheet-shaped or columnar structure. In a further embodiment, the signal connection port of the fixed transmission line can be directly led to the reverse side or external circuit of the dielectric plate without passing through the ground layer and the dielectric plate.

In another embodiment, referring to fig. 5, the phase shifting device 10 is further provided with a shielding cover 40 for covering the phase shifter 20, the shielding cover 40 is U-shaped, two side walls 42 of the shielding cover 40 are disposed on the ground plane 31, the two side walls 42 of the shielding cover 40 penetrate through the ground plane 31 and are plugged onto the dielectric board 30, and the shielding cover 40 is electrically connected to the ground plane 31, so as to improve the electrical performance of the phase shifting device 10.

In an exemplary embodiment of the present invention, referring to fig. 3, the fixed transmission line 21 includes two parallel strips 211 and a side strip 212 for connecting the two parallel strips 211. The two parallel strips 211 are juxtaposed in parallel with each other, and the two parallel strips 211 are arranged in order in the thickness direction of the dielectric sheet 30, and for the sake of distinguishing the two parallel strips 211, the parallel strip 211 near the dielectric sheet 30 is referred to as a first parallel strip 2111, and the other parallel strip 211 is referred to as a second parallel strip 2112. In one embodiment, the parallel strips 211 and the side strips 212 are each in the form of a long strip.

In one embodiment, the two pins 22 of the fixed transmission line are formed by bending two ends of the first parallel strip 2111.

In one embodiment, the dielectric support member is disposed between the first parallel strip 2111 and the ground plane 31, and extends from a side of the first parallel strip facing the ground plane 31 onto the ground plane 31 to support the fixed transmission line 21.

In one embodiment, the first parallel strap 2111 is disposed on the support strap 41 such that the fixed transmission line 21 is disposed on the support strap 41 of the shielded enclosure 40.

The side strips 212 are arranged along the extending direction of the parallel strips 211, and the side strips 212 are simultaneously connected to the same sides of the first parallel strips 2111 and the second parallel strips 2112, so that the first parallel strips 2111, the second parallel strips 2112 and the side strips 212 jointly form an open-slot-shaped sliding groove to accommodate the movable branch 221 of the movable transmission line 22, and the phase shift effect is realized when the movable branch 221 slides in the sliding groove. In one embodiment, the length of the side band 212 is the same as or different from the length of the parallel band 211, and the sliding groove has a U-shaped structure when the length of the side band 212 is the same as the length of the parallel band 211.

The two fixed transmission lines 21 respectively form a sliding groove, the two sliding grooves are parallel to each other and are arranged side by side, the respective side bands 212 of the two sliding grooves are both arranged on one side close to the other sliding groove, that is, the side bands 212 are arranged on one side of the fixed transmission line where the side bands are located close to the other fixed transmission line, so that the movable branch line 221 arranged in the sliding groove cannot fall off from one side of the sliding groove close to the other fixed transmission line and cannot move into the other sliding groove.

Referring to fig. 6, a graph showing a loss comparison between a phase shifter according to the present invention and a conventional phase shifter in actual tests is shown, wherein the upper three curves with triangular symbols in the graph are loss curves of the phase shifter according to the present invention, and the lower three curves with circular symbols in the graph are loss curves of the conventional phase shifter. As can be seen from FIG. 7, when the phase shifter of the present invention is used, the loss is reduced by 0.1dB, the loss is effectively reduced, and the phase shifting performance of the phase shifter is improved.

Referring to fig. 7, in order to perform a test using the phase shifter of the present invention in an actual test, a phase diagram in which the movable transmission line of the phase shifter is not shifted, shifted upward by 0.1mm, and shifted downward by 0.1mm is shown, wherein the uppermost curve in the diagram is a phase curve in which the movable transmission line is shifted upward by 0.1mm, the middle curve in the diagram is a phase curve in which the movable transmission line is not shifted, and the lower curve in the diagram is a phase curve in which the movable transmission line is shifted downward by 0.1 mm. As can be seen from FIG. 7, when the phase shift device of the present invention is used, the phase fluctuation of the phase shift device is within 3 when the movable transmission line of the phase shift device is shifted upward or downward by 0.1 mm. When the movable transmission line of the common phase shifting device is shifted upwards or downwards by 0.1mm, the phase fluctuation of the movable transmission line is generally over 10 degrees, so that the phase shifting device has good phase consistency and better phase shifting performance.

In one embodiment, the side edge strips 212 are disposed at the same end of the two parallel strips 211 of the fixed transmission line 21 in the extending direction, and the side edge strips 212 extend along the thickness direction of the dielectric plate 30 to connect the two parallel strips 211 to form a sliding slot for accommodating the movable branch 221 of the movable transmission line 22. The respective side strips 212 of the two fixed transmission lines 21 are disposed at the same end, so that the two movable branches 221 of the movable transmission line 22 can be disposed in the sliding grooves respectively formed by the two fixed transmission lines 21.

In one embodiment, the fixed transmission line is a long strip-shaped sheet, that is, the fixed transmission line is not formed into a sliding groove shape, but is merely a sheet structure disposed above the ground layer.

In an exemplary embodiment of the present invention, in conjunction with fig. 4, the active transmission line 22 includes a pair of active legs 221 and a connecting line 222 connecting the two active legs 221. The pair of movable branches 221 are parallel to each other and arranged side by side, and the two movable branches 221 are respectively coupled with one fixed transmission line 21 in parallel. The movable transmission line 22 is U-shaped.

Specifically, each of the movable branch lines 221 is disposed in a sliding slot formed by the fixed transmission line 21. The movable branch line 221 is parallel to the first parallel strip 2111 and the second parallel strip 2112 of the fixed transmission line 21, so that the movable branch line 221 can be coupled to the first parallel strip 2111 and the second parallel strip, respectively, and the movable branch line 221 can be coupled bilaterally, thereby improving the coupling efficiency.

The two movable branches 221 of the movable transmission line 22 are respectively disposed in the two sliding grooves, and the movable transmission line 22 is moved along the extending path of the sliding grooves, so that the two movable transmission lines 22 of the movable transmission line 22 simultaneously change the positions in the sliding grooves where the two movable transmission lines are located, so as to implement phase shifting.

The phase shifter 20 is further provided with a movable dielectric plate 24 for supporting the movable transmission line 22, and the movable transmission line 22 is disposed on one of front and back surfaces of the movable dielectric plate 24 parallel to the ground layer 31. The movable dielectric plate 24 is slid to drive the movable transmission line 22 disposed on the movable dielectric plate 24 to move, so as to implement phase shifting. The shape of the movable dielectric plate 24 is adapted to the shape of the sliding groove, so that the movable arm 241 of the movable dielectric plate 24 for being disposed on the movable transmission line 22 can slide in the sliding groove.

In one embodiment, the front and back sides of the movable dielectric plate 24 are respectively provided with a movable transmission line 22, and each movable transmission line 22 is respectively coupled with two parallel strips 211 of the fixed transmission line 21. Specifically, by providing one movable transmission line 22 on each of the front and back surfaces of the movable dielectric plate 24, the movable branch lines 221 of the two movable transmission lines 22 are coupled with the first parallel strip 2111 and the second parallel strip 2112 of the corresponding fixed transmission line 21, respectively, so as to increase the amount of coupling current and improve the phase shifting performance of the phase shifter 20.

In one embodiment, the reverse surface of the dielectric plate 30 may be used to dispose a part of the lines of the phase shifting device 10, or a part of the lines of a power division network where the phase shifting device 10 is located, or a part of the lines of an antenna where the phase shifting device 10 is located.

The invention also provides an antenna which comprises a radiation array formed by a plurality of radiation units and a power distribution network for feeding the radiation units in parallel. The power distribution network comprises the phase shifting device, the phase shifting device is used for controlling the phase of a polarized signal of the radiation array, after the polarized signal is fed into the phase shifting device, the phase shifting device divides the polarized signal into two paths of output signals with different phases, the two paths of output signals with different phases are respectively output to corresponding radiation units, and the radiation units receive the output signals with corresponding phases and externally emit the radiation signals with corresponding phases.

The invention also provides a base station comprising the antenna.

In summary, in the phase shifting device of the present invention, the fixed transmission line of the phase shifter is suspended, and the fixed transmission line is not in contact with the dielectric slab, so that the upper and lower sides of the fixed transmission line are both air dielectrics having a small influence on the phase shifting performance, thereby improving the phase consistency of the phase shifter, reducing the loss, and enhancing the phase shifting performance of the phase shifting device.

The foregoing description is only exemplary of the preferred embodiments of the invention and is illustrative of the principles of the technology employed. It will be appreciated by those skilled in the art that the scope of the invention according to the present invention is not limited to the specific combination of the above-mentioned features, but also encompasses other embodiments in which any combination of the above-mentioned features or their equivalents is possible without departing from the scope of the invention as defined by the appended claims. For example, the above features and (but not limited to) features having similar functions of the present invention are mutually replaced to form the technical solution.

Although the subject matter has been described in language specific to structural features and/or methodological acts, it is to be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or acts described above. Rather, the specific features and acts described above are disclosed as example forms of implementing the claims.