Frequency selective phase shifting device and multi-frequency antenna

Abstract

The application provides a frequency selection and phase shifting device and a multi-frequency antenna. The device comprises a linkage, a transmission screw rod fixed on the linkage, and a screw rod sleeve screwed with the transmission screw rod. The phase shifting mechanism comprises a transmission shaft and a phase shifting gear. The phase shifting gear is slidingly sleeved on the transmission shaft. The transmission shaft is arranged in parallel with the transmission screw rod. The phase shifting gear is pivotally arranged in a containing space provided by the linkage. The screw rod sleeve is used for conducting an external torque to the transmission screw rod. The phase shifting gear is driven by the transmission screw rod to move linearly along the transmission shaft to select engagement with any one phase shifting component. The transmission shaft is driven by the external torque to drive the phase shifting gear to rotate synchronously, and drive the engaged phase shifting component to perform phase shifting. The phase shifting gear is driven by the frequency selection mechanism to engage with any one phase shifting component. The phase shifting gear is driven by the phase shifting mechanism to rotate, and drive the phase shifting component to move to perform phase shifting.

Description

Technical Field

[0001] This invention belongs to the field of mobile communication technology, and specifically relates to a frequency selective phase shifting device and a multi-frequency antenna configured with the frequency selective phase shifting device. Background Technology

[0002] With the continuous increase in the number of mobile communication terminal users and the popularization of 5G, the demand for network capacity in mobile cellular networks is increasing. At the same time, it is necessary to minimize interference between different sites and even between different sectors of the same site, that is, to maximize network capacity and minimize interference. To achieve this goal, the antenna beam downtilt angle at the site is usually adjusted.

[0003] When the antenna is a multi-band antenna, the beam downtilt angle is mainly adjusted by machine downtilt. Specifically, the antenna usually has a built-in drive device. This drive device connects to the corresponding phase shifting components of each frequency band in the multi-band antenna through multiple phase shifting elements. The drive device selects one of the phase shifting elements through a frequency selection mechanism, and drives the phase shifting element through the phase shifting mechanism to perform the phase shifting operation.

[0004] However, traditional transmission devices have complex structures, require multiple transfers, have low frequency selection and phase shifting output efficiency, poor reliability, and the frequency selection mechanism is arranged vertically, while the phase shifting structure and frequency selection structure are designed separately. This further results in a large size of the transmission device, insufficient flatness, and inapplicability to be installed in an antenna. Moreover, the high production cost of the transmission device hinders its large-scale application. Summary of the Invention

[0005] The purpose of this invention is to solve at least one of the above-mentioned problems by providing a frequency selective phase shifting device and a multi-frequency antenna.

[0006] To meet the various objectives of this invention, the following technical solutions are adopted:

[0007] To achieve one of the objectives of this invention, a frequency-selective phase-shifting device is provided, comprising phase-shifting components corresponding to multiple frequency bands, a frequency-selection mechanism for selecting one frequency band of the phase-shifting component under external torque control, and a phase-shifting mechanism for implementing phase-shifting control on the selected phase-shifting component under external torque control.

[0008] The frequency selection mechanism includes a linkage component, a transmission screw fixed on the linkage component, and a screw sleeve screwed to the transmission screw.

[0009] The phase-shifting mechanism includes a drive shaft and a phase-shifting gear. The phase-shifting gear is slidably sleeved on the drive shaft. The drive shaft is arranged parallel to the drive screw. The phase-shifting gear is pivotally mounted in the accommodating space provided by the linkage.

[0010] The screw sleeve is used to transmit external torque to the transmission screw, which drives the phase-shifting gear to move linearly along the transmission shaft to select and mesh with any phase-shifting component; the transmission shaft is driven by external torque to drive the phase-shifting gear to rotate synchronously, thereby driving the meshing phase-shifting component to perform phase shifting.

[0011] Furthermore, the frequency selection mechanism and the phase shifting mechanism operate independently of each other, and the external torque selectively drives the frequency selection mechanism and the phase shifting mechanism.

[0012] Furthermore, a first transmission gear is provided on the outer periphery of the screw sleeve, which is used to transmit external torque.

[0013] Specifically, the linkage component has a pair of fixing components, and the two ends of the transmission screw are respectively connected to the pair of fixing components.

[0014] Furthermore, the accommodating space is disposed within the fixing member.

[0015] Specifically, the frequency selection mechanism further includes a compound gear and a first drive gear. The compound gear includes a first gear portion and a second gear portion fixedly disposed thereon. The first gear portion meshes with the first transmission gear, and the second gear portion meshes with the first drive gear. The first drive gear is used to receive external torque.

[0016] Specifically, the phase shifting mechanism further includes a second transmission gear and a second drive gear. The second transmission gear is slidably disposed on the transmission shaft, and the second drive gear meshes with the second transmission gear. The second drive gear is used to receive external torque.

[0017] Specifically, the frequency selection mechanism also includes a guide rod arranged parallel to the transmission shaft, and the guide rod and the transmission shaft are respectively slidably sleeved on both sides of the linkage.

[0018] Furthermore, the phase-shifting assembly includes a first phase-shifting unit, which is a phase-shifting rack that meshes with the phase-shifting gear.

[0019] Furthermore, the phase-shifting assembly includes a second phase-shifting unit, which includes a phase-shifting screw and a phase-shifting sleeve screwed to the phase-shifting screw, and the phase-shifting gear is used to drive the phase-shifting sleeve to rotate.

[0020] To meet one of the objectives of this invention, a multi-frequency antenna is provided, comprising multiple phase-shifting components corresponding to multiple frequency bands, including a frequency-selective phase-shifting device as described in any of the preceding objectives, wherein each of the phase-shifting components has a corresponding phase-shifting component in the frequency-selective phase-shifting device and is linked thereto.

[0021] Compared with existing technologies, the present invention has many advantages, including but not limited to:

[0022] On the one hand, the frequency-selective phase-shifting device of the present invention drives a phase-shifting gear to mesh with a phase-shifting component of any frequency band through a frequency-selective mechanism. Then, the phase-shifting mechanism drives a transmission shaft to rotate the phase-shifting gear, which in turn drives the phase-shifting component to move, thereby implementing phase shifting. The frequency selection and phase shifting methods of the frequency-selective phase-shifting device are simple and easy to operate.

[0023] On the other hand, the frequency selection mechanism and the phase shifting mechanism of the frequency selection and phase shifting device of the present invention operate independently of each other without interfering with each other, which facilitates precise control and thus precise phase shifting; and the independent operation of the frequency selection mechanism and the phase shifting mechanism makes both the frequency selection mechanism and the phase shifting mechanism have high transmission efficiency, thereby improving the operating efficiency of the frequency selection and phase shifting device.

[0024] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and will become apparent from the description or may be learned by practice of the invention. Attached Figure Description

[0025] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein:

[0026] Figure 1 This is a schematic diagram of the structure of a frequency-selective phase-shifting device according to a typical embodiment of the present invention.

[0027] Figure 2 This is a schematic diagram of the linkage component of the frequency selective phase shifting device according to a typical embodiment of the present invention.

[0028] Figure 3 This is a schematic diagram of the structure between two rows of phase-shifting racks, a drive shaft, and phase-shifting gears in one embodiment of the present invention.

[0029] Figure 4 This is a schematic diagram of the structure of a frequency selective phase shifting device according to another embodiment of the present invention. Detailed Implementation

[0030] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention and should not be construed as limiting the present invention.

[0031] Those skilled in the art will understand that, unless specifically stated otherwise, the singular forms “a,” “an,” “the,” and “the” used herein may also include the plural forms. It should be further understood that the term “comprising” as used in this specification means the presence of the stated features, integers, steps, operations, elements, and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, and / or components, nor does it exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof. It should be understood that when we say an element is “connected” or “coupled” to another element, it can be directly connected or coupled to the other element, or there may be intermediate elements. Furthermore, “connected” or “coupled” as used herein can include wireless connections or wireless coupling. The term “and / or” as used herein includes all or any units and all combinations of one or more associated listed items.

[0032] It will be understood by those skilled in the art that, unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. It should also be understood that terms such as those defined in general dictionaries should be understood to have the same meaning as in the context of the prior art, and should not be interpreted in an idealized or overly formal sense unless specifically defined as herein.

[0033] The present invention provides a frequency selective phase shifting device, which includes a frequency selection mechanism and a phase shifting mechanism. The frequency selection mechanism is used to select a phase shifting component of a frequency band, and the phase shifting mechanism is used to move the selected phase shifting component to implement phase shifting. The frequency selection mechanism and the phase shifting mechanism operate independently and do not interfere with each other, thereby improving the operating efficiency of the frequency selective phase shifting device.

[0034] In a typical embodiment of the present invention, combined with Figure 1 The frequency selection phase shifting device 100 includes multiple frequency band corresponding phase shifting components 130, a frequency selection mechanism, and a phase shifting mechanism. The frequency selection mechanism is used to select a phase shifting component 130 of one frequency band, and the phase shifting mechanism is used to drive the phase shifting component 130 selected by the frequency selection mechanism to perform phase shifting.

[0035] Combination Figure 1The phase-shifting mechanism includes a drive shaft 111, a phase-shifting gear 112, and a first transmission assembly. The phase-shifting gear 112 engages with the phase-shifting assembly 130 and is slidably sleeved on the drive shaft 111. The first transmission assembly transmits external torque to the drive shaft 111 to drive it to rotate, thereby causing the drive shaft 111 to drive the phase-shifting gear 112 to rotate. In one embodiment, the drive shaft 111 has a hexagonal cross-section, and the cross-section of the inner hole of the phase-shifting gear 112 corresponds to the cross-section of the drive shaft 111, also being hexagonal, so that the drive shaft 111 can pass through the inner hole of the phase-shifting gear 112, allowing the phase-shifting gear 112 to be slidably sleeved on the drive shaft 111.

[0036] The first transmission assembly includes a first transmission gear 113, a first drive gear 114, and a first drive shaft 115. The first transmission gear 113 is sleeved on the transmission shaft 111 and meshes with the first drive gear 114. The first drive shaft 115 is inserted into the first drive gear 114 and is used to receive external torque. Thus, the first drive shaft 115 sequentially drives the first drive gear 114, the first transmission gear 113, the transmission shaft 111, and the phase shifting gear 112 to rotate, thereby causing the phase shifting gear 112 to drive the phase shifting assembly 130 meshing with it to move, thereby implementing phase shifting.

[0037] In one embodiment, the first drive shaft 115 is connected to the output shaft of a first motor (not shown) so that the first motor outputs driving torque to the first drive shaft 115. The first drive shaft 115 and the first drive gear 114 are integrally formed.

[0038] In one embodiment, the first transmission gear 113 is a bevel gear, and the first drive gear 114 is also a bevel gear, so that the first drive gear 114 can mesh with the first transmission gear 113.

[0039] In one embodiment, the cross-section of the drive shaft 111 is hexagonal, and the cross-section of the inner hole of the first drive gear 113 is also hexagonal, corresponding to the cross-section of the drive shaft 111. The drive shaft 111 passes through the inner hole of the first drive gear 113 so that the first drive gear 113 can drive the drive shaft 111 to rotate.

[0040] Combination Figure 1The frequency selection mechanism includes a linkage 121, a transmission screw 122, a screw sleeve 123, and a second transmission assembly. The transmission screw 122 is arranged parallel to the transmission shaft 111. The transmission screw 122 is fixed on the linkage 121, and the screw sleeve 123 is screwed on the transmission screw 122. The second transmission assembly is used to transmit external torque to the screw sleeve 123 to drive the screw sleeve 123 to rotate, so that the screw sleeve 123 drives the transmission screw 122 to move along the extension direction of the screw sleeve 123, thereby causing the transmission screw 122 to drive the linkage 121 fixed thereto to move.

[0041] Combination Figure 1 and Figure 2 The linkage 121 includes a pair of fixing members 1211 and a crossbeam 1212 for connecting the pair of fixing members 1211. The fixing members 1211 are provided with an installation space 1213 and a receiving space 1214. The installation space 1213 is used to fix one end of the transmission screw 122, and the receiving space 1214 is used to pivotally install the phase shifting gear 112.

[0042] Specifically, both ends of the transmission screw 122 are respectively fixedly installed in the mounting space 1213 of the pair of fixing members 1211, so that the transmission screw 122 is fixed on the linkage member 121. In one embodiment, the mounting space 1213 is a mounting groove, and the end of the transmission screw 122 extends into the mounting groove, and the end of the transmission screw 122 is fixed in the mounting groove by screws.

[0043] The fixing member 1211 is provided with a pair of opposing mounting plates 1215, which define the accommodating space 1214. The phase-shifting gear 112 is pivotally mounted in the accommodating space 1214, that is, the phase-shifting gear 112 is disposed between the pair of mounting plates 1215. The mounting plates 1215 are provided with mounting holes 1216, and the drive shaft 111 slides through the respective mounting holes 1216 of the pair of mounting plates 1215, and the phase-shifting gear 112 disposed in the accommodating space 1214 is slidably sleeved on the drive shaft 111. When the linkage member 121 moves linearly under the drive of the drive screw 122, the phase-shifting gear 112 disposed in the accommodating space 1214 of the fixing member 1211 also moves linearly along the extension direction of the drive shaft 111 under the drive of the linkage member 121. Preferably, the accommodating space 1214 is groove-shaped.

[0044] Combination Figure 1A second transmission gear 124 is also fixedly mounted on the outer periphery of the screw sleeve 123. The second transmission gear 124 is used to receive the driving torque transmitted by the second transmission component. Under the action of the driving torque, the second transmission gear 124 rotates, causing the screw sleeve 123 to rotate. After the screw sleeve 123 rotates, the transmission screw 122 fixed on the linkage 121 drives the linkage 121 to move linearly along the extension direction of the screw sleeve 123. Preferably, the screw sleeve 123 and the second transmission gear 124 are integrally formed.

[0045] The second transmission assembly includes a first compound gear 125, a second drive gear 126, and a second drive shaft 127. The first compound gear 125 includes a first tooth portion 1251 and a second tooth portion 1252, which are fixedly connected. The first tooth portion 1251 meshes with a second transmission gear 124 mounted on a screw sleeve 123, and the second tooth portion 1252 meshes with the second drive gear 126. The second drive shaft 127 is inserted into the inner hole of the second drive gear 126. The second drive shaft 127 is used to receive external torque, causing the second drive shaft 127 to rotate. The second drive shaft 127 sequentially drives the second drive gear 126, the second tooth 1252 and the first tooth 1251 of the first compound gear 125, the screw sleeve 123, the transmission screw 122 and the linkage 121 to move, so that the phase shifting gear 112 pivotally mounted in the accommodating space 1214 of the linkage 121 can move linearly along the extension direction of the transmission shaft 111 and mesh with any one of the phase shifting components 130 to complete frequency selection.

[0046] In one embodiment, the second drive shaft 127 is connected to the output shaft of a second motor (not shown) so that the second motor outputs driving torque to the second drive shaft 127. The second drive shaft 127 and the second drive gear 126 are integrally formed.

[0047] In one embodiment, the second drive gear 126 is a bevel gear, and the second tooth 1252 of the first compound gear 125 is also a bevel gear, so that the second drive gear 126 can mesh with the second gear of the first compound gear 125.

[0048] In a typical embodiment of the present invention, the drive shaft 111, phase-shifting gear 112, first drive gear 113, and first compound gear 125 are arranged along the same axis (referred to as the first axis), and the drive screw 122, screw sleeve 123, and second drive gear 124 are also arranged along the same axis (referred to as the second axis). The first axis and the second axis are arranged parallel to each other, which facilitates the flattening of the frequency-selective phase-shifting device 100 and reduces its volume. Furthermore, the linkage 121 is also flattened, which further reduces the volume of the frequency-selective phase-shifting device 100, making it easier to install in an antenna and reduce the size of the antenna. Preferably, the centers of the drive shaft 111, phase-shifting gear 112, first drive gear 113, and first compound gear 125 are each located on the first axis, and the centers of the drive screw 122, screw sleeve 123, and second drive gear 124 are each located on the second axis, further flattening the frequency-selective phase-shifting device 100.

[0049] In a typical embodiment of the present invention, combined with Figure 1 The phase shifting assembly 130 includes a first phase shifting unit, which is a phase shifting rack 131. One end of the phase shifting rack 131 is connected to the phase shifting component of the antenna. The phase shifting gear 112 meshes with the phase shifting rack 131. When the transmission shaft 111 drives the phase shifting gear 112 to rotate, it drives the phase shifting rack 131 to move linearly, so that the phase shifting rack 131 drives the phase shifting component to move linearly, thereby enabling the phase shifting component to drive the phase shifting component of the antenna to perform phase shifting and change the corresponding phase of the antenna.

[0050] The plurality of phase-shifting components 130 correspond to a plurality of phase-shifting racks 131, which are arranged along the extension direction of the transmission shaft 111 so that the phase-shifting gear 112 sleeved on the transmission shaft 111 can mesh with any one of the phase-shifting racks 131 and drive the meshing phase-shifting racks 131 to move linearly to perform phase shifting.

[0051] In one embodiment, combined Figure 3 The multiple phase-shifting racks 131 are arranged in two rows, and the two rows of phase-shifting racks are respectively arranged on both sides of the transmission shaft 111, so as to arrange more phase-shifting racks 131 in the limited space of the frequency selection phase-shifting device 100, so as to adjust the phase of signals in more frequency bands.

[0052] The two rows of phase-shifting racks are parallel to each other and are arranged in an alternating manner, facing each other. These two rows of phase-shifting racks are referred to as the first row of phase-shifting racks and the second row of phase-shifting racks, respectively. The spacing between any two adjacent phase-shifting racks 131 in the same row is equal. The projections of the two rows of phase-shifting racks onto the plane of the first row of phase-shifting racks are alternately arranged so that the two rows of phase-shifting racks are spatially staggered and facing each other. That is to say, the projection of one phase-shifting rack 131 in the second row onto the plane of the first row of phase-shifting racks is adjacent to the projections of one or two adjacent phase-shifting racks 131 in the first row onto the plane of the first row of phase-shifting racks, so as to achieve an alternating and facing arrangement of the two rows of phase-shifting racks.

[0053] In one embodiment, the phase-shifting assembly 130 further includes a second phase-shifting unit, which includes a phase-shifting screw 132, a phase-shifting sleeve 133, and a second compound gear 135. One end of the phase-shifting screw 132 is connected to the phase-shifting component of the antenna. The phase-shifting sleeve 133 is screwed onto the phase-shifting screw 132, and a third transmission gear 134 is fixed on the outer periphery of the phase-shifting sleeve 133. The second compound gear 135 includes a first tooth 1351 and a second tooth 1352. The first tooth 1351 meshes with the third transmission gear 134, and the second tooth 1352 meshes with the phase-shifting gear 132. Preferably, the phase-shifting screw 132 has a cross-section along its extension direction, such that the cross-section of the phase-shifting screw 132 is not circular, thereby preventing the phase-shifting screw 132 from rotating when driven by the phase-shifting sleeve 133.

[0054] When the phase-shifting gear 112 meshes with the second tooth 1352 of the second compound gear 135, the phase-shifting gear 112 is driven to rotate via the transmission shaft 111. The phase-shifting gear 112 sequentially drives the second tooth 1352 of the second compound gear 135, the first tooth 1351 of the second compound gear 135, the third transmission gear 134, the phase-shifting sleeve 133, and the phase-shifting screw 132, causing the phase-shifting screw 132 to move linearly, thereby driving the phase-shifting component connected to the phase-shifting screw 132 to perform phase shifting.

[0055] The plurality of phase-shifting components 130 correspond to a plurality of second phase-shifting units. The arrangement of the plurality of second phase-shifting units is the same as that of the plurality of phase-shifting racks 131. For the sake of brevity, it will not be described in detail here.

[0056] In one embodiment, the phase-shifting screw 132 is further provided with a scale, through which the amount of retraction of the phase-shifting screw 132 during the phase-shifting process can be known, so as to control the amount of phase shifting of the phase-shifting component and accurately perform phase shifting.

[0057] In one embodiment, the phase shifting assembly 130 is provided with a first phase shifting unit and a second phase shifting unit. The first phase shifting unit and the second phase shifting unit are arranged in two rows and are respectively arranged on both sides of the transmission shaft 111, wherein the first phase shifting unit is arranged in the same row and the second phase shifting unit is arranged in the other row.

[0058] In a typical embodiment of the present invention, the implementation process of frequency selective phase shifting based on the frequency selective phase shifting device 100 is briefly described as follows:

[0059] First, select the phase shifting component 130 for the corresponding frequency band.

[0060] A driving torque is applied to the second transmission component, driving the second transmission gear 124 on the screw sleeve 123 to rotate, which in turn drives the screw sleeve 123 to rotate. This causes the transmission screw 122 to drive the linkage 121 to move linearly along the extension direction of the screw sleeve 123, thereby driving the phase shifting gear 112, which is located in the accommodating space 1214 of the linkage 121, to move linearly along the extension direction of the transmission shaft 111. This causes the phase shifting gear 112 to mesh directly with the selected phase shifting component 130, completing frequency selection, and stopping the application of driving torque to the second transmission component.

[0061] Next, the selected phase-shifting component 130 is moved. A driving torque is applied to the first transmission component, driving the transmission shaft 111 to rotate. The transmission shaft 111 drives the phase-shifting gear 112 sleeved on it to rotate. The phase-shifting gear 112 drives the phase-shifting component 130 to move, so that the phase-shifting component 130 drives the phase-shifting part of the antenna to move, thereby implementing phase shifting and changing the phase of the signal in the corresponding frequency band of the antenna.

[0062] Thus, the frequency-selective phase-shifting device 100 selects one phase-shifting component 130 from multiple phase-shifting components 130 through the frequency selection mechanism, and makes the phase-shifting gear 112 mesh with the phase-shifting component 130. Then, by driving the phase-shifting gear 112 of the phase-shifting mechanism to rotate, the phase-shifting component 130 is moved to perform phase shifting.

[0063] In one embodiment, combined Figure 1 and Figure 2The pair of fixing members 1211 includes a first fixing member 128 and a second fixing member 129. Each of the first fixing member 128 and the second fixing member 129 is provided with a phase-shifting gear 112. The phase-shifting gear 112 on the first fixing member 128 is a first phase-shifting gear 1121, and the phase-shifting gear 112 on the second fixing member 129 is a second phase-shifting gear 1122. Both the first phase-shifting gear 1121 and the second phase-shifting gear 1122 can mesh with the phase-shifting assembly 130 to move the phase-shifting assembly 130 and perform phase shifting. Furthermore, providing two phase-shifting gears 112 shortens the distance between the phase-shifting gear 112 and the predetermined phase-shifting assembly 130, avoiding the need for the phase-shifting gear 112 to move a long distance to mesh with the predetermined phase-shifting assembly 130.

[0064] In another embodiment, the first phase-shifting gear 1121 and the second phase-shifting gear 1122 work alternately. That is, when the first phase-shifting gear 1121 engages the phase-shifting component 130, the second phase-shifting gear 1122 does not engage the phase-shifting component 130; when the second phase-shifting gear 1122 engages the phase-shifting component 130, the first phase-shifting gear 1121 does not engage the phase-shifting component 130, so as to reduce the load on the transmission shaft 111 and avoid the transmission shaft 111 being unable to drive the two phase-shifting gears 112 at the same time.

[0065] In one embodiment, the frequency selective phase shifting device 100 further includes a guide rod 150, which guides the linkage 121 to move linearly along the extension direction of the screw sleeve 123. The guide rod 150 is arranged parallel to the drive shaft 111, and the guide rod 150 and the drive shaft 111 are respectively arranged on both sides of the linkage 121, thereby supporting the linkage 121 on both sides. Specifically, the fixing member 1211 of the linkage 121 has a guide block 1217 on the side facing the guide rod 150, and the guide block 1217 has a guide hole 1218. The guide rod 150 slides through the guide holes 1218 of the two fixing members 1211, so that the guide rod 150 is arranged on the linkage 121 and guides the linkage 121 to move linearly along the extension direction of the drive shaft 111.

[0066] The frequency selective phase shifting device 100 also includes a bracket, which includes a pair of support plates 141. The support plates 141 are provided with a first connection hole (not shown) and a second connection hole (not shown). The two ends of the drive shaft 111 are respectively inserted into the first connection holes of the two support plates 141, and the two ends of the guide rod 150 are respectively inserted into the second connection holes of the two support plates, so as to fix the drive shaft 111 and the guide rod 150 on the bracket.

[0067] In one embodiment, combined Figure 1The frequency selective phase shifting device 100 is configured in a first manner. Specifically, the extension axis of the phase shifting rack 131 is parallel to the extension axis of the support plate 141, which facilitates the flattening of the frequency selective phase shifting device 100, reduces the volume of the frequency selective phase shifting device 100, and makes it easier to install the frequency selective phase shifting device 100 in the antenna, thus reducing the volume of the antenna.

[0068] Combination Figure 4 The frequency selective phase shifting device 100 is configured in a second manner. Specifically, the extension axis of the phase shifting rack 131 is perpendicular to the extension axis of the support plate 141, so that the part of the frequency selective phase shifting device 100 other than the phase shifting rack 131 can be further flattened. The frequency selective phase shifting device 100 is adapted to be installed in the antenna, further reducing the size of the antenna.

[0069] The present invention also provides a multi-frequency antenna, including multiple phase-shifting components corresponding to multiple frequency bands, which include the frequency selective phase-shifting device described above, and each phase-shifting component is linked to a phase-shifting component of the corresponding frequency selective phase-shifting device.

[0070] In summary, the frequency-selective phase-shifting device of the present invention drives the phase-shifting gear to mesh with any phase-shifting component through the frequency-selective mechanism, and drives the phase-shifting gear to rotate through the phase-shifting mechanism, so that the phase-shifting gear drives the phase-shifting component to move, thereby implementing phase shifting; the frequency-selective mechanism and the phase-shifting mechanism operate independently and do not interfere with each other, thereby improving the operating efficiency of the frequency-selective phase-shifting device.

[0071] The above description is merely a preferred embodiment of the present invention and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention is not limited to the specific combination of the above-described technical features, but also includes other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above-described features with (but not limited to) technical features with similar functions as those in the present invention.

[0072] Although the subject matter has been described using language specific to structural features and / or methodological logic, it should be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or actions described above. Rather, the specific features and actions described above are merely illustrative examples of implementing the claims.

Claims

1. A frequency-selective phase-shifting device, comprising phase-shifting components corresponding to multiple frequency bands, a frequency-selective mechanism for selecting one frequency band of the phase-shifting component under the control of a first external torque, and a phase-shifting mechanism for implementing phase-shifting control on the selected phase-shifting component under the control of a second external torque, characterized in that: The frequency selection mechanism includes a linkage component, a transmission screw fixed on the linkage component, and a screw sleeve screwed to the transmission screw. The phase-shifting mechanism includes a drive shaft and a phase-shifting gear. The phase-shifting gear is slidably sleeved on the drive shaft. The drive shaft is arranged parallel to the drive screw. The phase-shifting gear is pivotally mounted in the accommodating space provided by the linkage. The screw sleeve is used to transmit a first external torque to the transmission screw, which drives the phase-shifting gear to move linearly along the transmission shaft to select and mesh with any phase-shifting component; the transmission shaft is driven by a second external torque to drive the phase-shifting gear to rotate synchronously, thereby driving the meshing phase-shifting component to perform phase shifting.

2. The frequency selective phase shifting device of claim 1, wherein, The frequency selection mechanism and the phase shifting mechanism operate independently of each other, and one of the frequency selection mechanism and the phase shifting mechanism can be selected to work at a time.

3. The frequency selective phase shifting device of claim 1, wherein, The outer circumference of the screw sleeve is provided with a first transmission gear, which is used to transmit a first external torque.

4. The frequency selective phase shifting device of claim 1, wherein, The linkage component is provided with a pair of fixing components, and the two ends of the transmission screw are respectively connected to the pair of fixing components.

5. A frequency selective phase shifting device as claimed in claim 4, characterized in that The accommodating space is provided in the fixing member.

6. The frequency selective phase shifting device of claim 3, wherein, The frequency selection mechanism further includes a compound gear and a first drive gear. The compound gear includes a first gear portion and a second gear portion fixedly disposed thereon. The first gear portion meshes with the first transmission gear, and the second gear portion meshes with the first drive gear. The first drive gear is used to receive a first external torque.

7. The frequency selective phase shifting device of claim 1, wherein, The phase-shifting mechanism further includes a second transmission gear and a second drive gear. The second transmission gear is slidably disposed on the transmission shaft, and the second drive gear meshes with the second transmission gear. The second drive gear is used to receive a second external torque.

8. The frequency selective phase shifting device of claim 1, wherein: The frequency selection mechanism also includes a guide rod arranged parallel to the transmission shaft, and the guide rod and the transmission shaft are respectively slidably sleeved on both sides of the linkage.

9. The frequency-selective phase-shifting device as described in claim 1, characterized in that, The phase-shifting assembly includes a first phase-shifting unit, which is a phase-shifting rack that meshes with the phase-shifting gear.

10. A frequency selective phase shifting device as claimed in claim 1 or 9, characterized in that The phase-shifting assembly includes a second phase-shifting unit, which includes a phase-shifting screw and a phase-shifting sleeve screwed to the phase-shifting screw. The phase-shifting gear is used to drive the phase-shifting sleeve to rotate.

11. A multi-band antenna comprising a plurality of phase shift components corresponding to a plurality of frequency bands, characterized in that, It includes the frequency selective phase shifting device as described in any one of claims 1 to 10, wherein each of the phase shifting components has a corresponding phase shifting component in the frequency selective phase shifting device and is linked thereto.

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