CN114256606A - Antenna - Google Patents
Antenna Download PDFInfo
- Publication number
- CN114256606A CN114256606A CN202111573951.4A CN202111573951A CN114256606A CN 114256606 A CN114256606 A CN 114256606A CN 202111573951 A CN202111573951 A CN 202111573951A CN 114256606 A CN114256606 A CN 114256606A
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- steel strip
- side wing
- steel
- wing
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 169
- 239000010959 steel Substances 0.000 claims abstract description 169
- 239000004020 conductor Substances 0.000 claims abstract description 38
- 230000017525 heat dissipation Effects 0.000 claims description 16
- 230000008878 coupling Effects 0.000 claims description 13
- 238000010168 coupling process Methods 0.000 claims description 13
- 238000005859 coupling reaction Methods 0.000 claims description 13
- 230000005855 radiation Effects 0.000 claims description 13
- 239000013013 elastic material Substances 0.000 claims description 6
- 238000004804 winding Methods 0.000 claims description 5
- 230000002708 enhancing effect Effects 0.000 claims description 3
- 239000003990 capacitor Substances 0.000 abstract description 9
- 238000010586 diagram Methods 0.000 description 7
- 238000004891 communication Methods 0.000 description 5
- 230000010287 polarization Effects 0.000 description 5
- 239000004677 Nylon Substances 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 4
- 229920001778 nylon Polymers 0.000 description 4
- 238000013021 overheating Methods 0.000 description 4
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 239000002131 composite material Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 238000003491 array Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/02—Arrangements for de-icing; Arrangements for drying-out ; Arrangements for cooling; Arrangements for preventing corrosion
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/08—Means for collapsing antennas or parts thereof
- H01Q1/084—Pivotable antennas
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/42—Housings not intimately mechanically associated with radiating elements, e.g. radome
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
- H01Q19/02—Details
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
- H01Q19/10—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
- H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
- H01Q3/30—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array
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- Aerials With Secondary Devices (AREA)
Abstract
The present application provides an antenna, comprising: the antenna comprises a phase shifter, a balanced balun, a first antenna steel belt, a second antenna steel belt, an active oscillator and a capacitive loading unit, wherein the phase shifter is connected with the balanced balun through a radio frequency line. By arranging the balanced balun, the capacitive loading unit and the active oscillator, when the antenna is in a working state, the first steel sheet and the second steel sheet in the active oscillator can be matched with the capacitive loading unit to form a capacitor, and then the input impedance of the antenna can be changed by matching with other devices in the antenna under the condition that a broadband matcher is not introduced, so that the frequency band of the antenna is expanded, and the frequency band of the antenna is effectively widened. Further, currents transmitted by the inner conductor and the outer conductor are balanced by the balanced balun and tend to be the same, so that the direction of an antenna signal is prevented from being deviated due to currents with different magnitudes, and directional propagation of the antenna signal is achieved.
Description
Technical Field
The application relates to the technical field of communication, in particular to an antenna.
Background
In ultrashort wave communication, a directional antenna design is often adopted to achieve a high gain effect. The existing ultrashort wave directional antenna comprises a log periodic antenna, a parabolic antenna and a yagi antenna, and among the antennas, the yagi antenna has the advantages of high gain and easy realization of circular polarization, and has surpassed other types of antennas, and gradually becomes the mainstream antenna in the ultrashort wave directional antenna.
In the prior art, in order to enable an antenna to receive an incoming wave with any polarization and enable a radiated wave to be received by an antenna with any polarization, circular polarization needs to be performed on the incoming wave. Although the yagi antenna can easily realize circular polarization, the biggest disadvantage is the narrow operating band. Most of the existing methods for widening the frequency band of the yagi antenna adopt composite guide, but the capability of widening the composite guide is quite limited, and the broadband requirement of ultrashort wave communication cannot be met.
In view of the above, there is a need for an antenna for widening the frequency band of the antenna to enhance the ultrashort wave communication capability of the antenna.
Disclosure of Invention
The application provides an antenna, which is used for widening the frequency band of the antenna so as to enhance the ultrashort wave communication capability of the antenna.
The present application provides an antenna, comprising: the device comprises a phase shifter, a balanced balun, a first antenna steel belt, a second antenna steel belt, an active oscillator and a capacitive loading unit; each antenna steel strip in the first antenna steel strip and the second antenna steel strip comprises a first side wing and a second side wing, the active oscillator comprises a first steel strip and a second steel strip, and a plane formed by the first steel strip and the second steel strip is parallel to the capacitive loading unit; the first side wing of the first antenna steel belt is connected with the first steel sheet, the second side wing of the first antenna steel belt is connected with the second steel sheet, and the first side wing of the second antenna steel belt is connected with the second side wing of the second antenna steel belt through the capacitive loading unit; the phase shifter is connected with the balanced balun through a radio frequency line, the balanced balun is realized by winding the radio frequency line into a coil, and at the winding-out end of the balanced balun: the outer conductor of the radio frequency wire is connected with the first steel sheet, and the inner conductor of the radio frequency wire is connected with the second steel sheet.
In the above manner, by arranging the balanced balun, the capacitive loading unit and the active oscillator, and connecting the devices according to the connection relationship, when the antenna is in a working state, the first steel sheet and the second steel sheet in the active oscillator can cooperate with the capacitive loading unit to form a capacitor, and further can cooperate with other devices in the antenna to change the input impedance of the antenna without introducing a broadband matcher, thereby realizing the frequency band expansion of the antenna and effectively widening the frequency band of the antenna. Further, by connecting the inner conductor and the outer conductor at the winding-out end of the balanced balun with different steel sheets, even if the currents transmitted through the inner conductor and the outer conductor are different due to different electric conductivity of the inner conductor and the outer conductor, the currents transmitted through the inner conductor and the outer conductor can be balanced by the balanced balun and tend to be the same, so that the direction of an antenna signal is prevented from being deviated due to the currents of different magnitudes, and the directional transmission of the antenna signal is realized.
In one possible implementation manner, the phase shifter is located in the reflector, and the balanced balun, the first antenna steel strip, the second antenna steel strip, the active oscillator and the capacitive loading unit are located in the radiation unit; the reflector is a device for reflecting antenna signals in the antenna, and the radiating element is a device for transceiving antenna signals in the antenna.
In this way, the phase shifter and the balanced balun are respectively located in different antenna structures, but not both located in the radiating element, and they may be connected by using a radio frequency line. Therefore, the concentrated heating of the phase shifter and the balanced balun is effectively avoided, the radiating efficiency of the antenna is improved, the situation that the antenna cannot normally work due to overheating is avoided, and the working efficiency of the antenna is improved.
In one possible implementation, the radiation unit further includes a coupling unit; the coupling unit is located on one side, opposite to a plane formed by the first steel sheet and the second steel sheet, of the capacitive loading unit and is parallel to the capacitive loading unit.
By the mode, the coupling unit is added, the coupling capacitor is formed between the coupling unit and the loading unit, the diameter of the coupling unit, the distance between the coupling unit and the loading unit and the size of the coupling capacitor can be adjusted, the bandwidth of the antenna is further adjusted, and the frequency bandwidth of the antenna is further widened.
In one possible implementation, the antenna further includes a support shaft on which the reflector and the radiating element are disposed side by side; the radiating element further comprises a first shell, the balanced balun, the active oscillator and the capacitive loading unit are located in the first shell, the first antenna steel strip and the second antenna steel strip are located outside the first shell, the first side wing and the second side wing of the first antenna steel strip are deployed at 180 degrees, the first side wing and the second side wing of the second antenna steel strip are deployed at 180 degrees, one end of the first side wing and one end of the second side wing of the first antenna steel strip and one end of the first side wing and one end of the second side wing of the second antenna steel strip are fixed on the outer side wall of the first shell, and the one end of the first side wing of the first antenna steel strip and one end of the first side wing of the second antenna steel strip are staggered by a first distance in the direction of the supporting shaft.
In such a way, the supporting shaft is used for connecting the antenna components in series, so that the components are arranged along the axial direction, and the components can be detached along the axial direction when the antenna is not used, so that the antenna is convenient to store. And the first flank and the second flank of antenna steel band are 180 degrees and exist in pairs, can be connected with the first steel sheet and the second steel sheet of active oscillator respectively, and then are connected with the inner conductor and the outer conductor of radio frequency line for have the electric current to flow through on two flanks, and the balanced balun of cooperation ensures that the electric current that flows through on two flanks equals, has guaranteed antenna signal's directional transmission, and can not take place the skew.
In one possible implementation, the radiation unit further includes a first heat dissipation member, and the first heat dissipation member is tightly attached to the first housing.
Through the mode, the heat generated by the devices in the radiation unit can be timely dissipated, and the damage of the devices generated by the overheating of the antenna is avoided.
In one possible implementation manner, the reflector includes a second housing and further includes a first heat dissipation member, and the first heat dissipation member is tightly attached to the second housing.
Through the mode, the heat generated by the internal device of the reflector is timely dissipated, the first heat dissipation part and the second heat dissipation part are separately designed, heat dissipation can be conducted on different parts of the antenna, and the heat dissipation efficiency is improved. And the damage of the device caused by the overheating of the antenna is avoided.
In one possible implementation, the reflector further includes a radio frequency port, and the radio frequency port is located outside the second housing; for transmitting signals from or received antenna signals to the device to which the antenna is connected.
Through the mode, the radio frequency port of the antenna is arranged outside the second shell of the reflector, so that the function of transmitting and receiving signals by the antenna is realized.
In a possible implementation manner, the antenna further includes N directing units, where the N directing units, the radiating unit, and the reflector are sequentially arranged side by side on the supporting shaft, and N is a positive integer greater than or equal to 1; the guiding unit is used for controlling the transmitting direction of the antenna signal in the antenna unit and enhancing the strength of the signal.
By the mode, the guiding unit is arranged, directional propagation of antenna signals can be realized, the strength of the antenna signals is enhanced, and the overall performance of the antenna is improved.
In one possible implementation manner, the guiding unit includes a third casing and a third antenna steel strip, the third antenna steel strip is fixed outside the third casing, and the first side wing and the second side wing of the third antenna steel strip are disposed at 180 degrees.
In this way, the third antenna steel band that leads to the unit is set up, and the antenna steel band can use elastic material to make, and when not using the antenna, third antenna steel band can buckle, can accomodate leading to the unit, reduces the space of antenna and occupies, portable.
In one possible implementation manner, the antenna steel belts in the antenna are all made of elastic materials; when the antenna is folded: one end, which is not fixed, of the antenna steel strip in the antenna is bent towards the supporting shaft, so that the first side wing and the second side wing of the antenna steel strip are folded to the supporting shaft, and the antenna is in a folded umbrella shape; when the antenna is deployed: the end, which is not fixed, of the antenna steel strip in the antenna and the fixed end of the antenna steel strip are in a straight line, and the straight line is perpendicular to the supporting shaft.
By the mode, the antenna steel belt is made of the elastic material, so that the antenna can be folded and unfolded, the occupied space when the antenna is not used is reduced, the antenna is beneficial to being used in a multi-task scene, and the use purpose of the antenna is expanded.
Drawings
Fig. 1 schematically illustrates an application scenario provided in an embodiment of the present application;
fig. 2 schematically illustrates an internal structure provided by an embodiment of the present application;
fig. 3 is a schematic structural diagram schematically illustrating an antenna rigid strip provided by an embodiment of the present application;
fig. 4 is a schematic diagram schematically illustrating a shape of an antenna that is housed and unfolded according to an embodiment of the present application;
fig. 5 exemplarily shows a schematic structural diagram of an antenna centralized storage provided by an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1 schematically illustrates an internal structure of an antenna provided in an embodiment of the present application. As shown in fig. 1, the antenna includes: the antenna comprises a phase shifter, a balanced balun, a first antenna steel belt, a second antenna steel belt, an active oscillator and a capacitive loading unit. Each of the first antenna steel strip and the second antenna steel strip comprises a first side wing and a second side wing (for the convenience of understanding, the side wing above the figure is called as the first side wing, and the side wing below the figure is called as the second side wing), the active oscillator comprises a first steel sheet and a second steel sheet, and the plane formed by the first steel sheet and the second steel sheet is parallel to the capacitive loading unit.
The connection relationship of the following components is described as follows:
referring to fig. 1, a first side wing of a first antenna steel strip is connected to a first steel strip, a second side wing of the first antenna steel strip is connected to a second steel strip, and the first side wing of the second antenna steel strip is connected to the second side wing of the second antenna steel strip through a capacitive loading unit. Therefore, when the antenna is in a working state, the first steel sheet and the second steel sheet in the active oscillator can be matched with the capacitive loading unit to form a capacitor, and then the input impedance of the antenna can be changed by matching with other devices in the antenna under the condition that a broadband matcher is not introduced, so that the frequency band of the antenna is expanded, and the frequency band of the antenna is effectively widened.
Further, as shown in fig. 1, the antenna further includes a radio frequency line, the radio frequency line is divided into two sections, one section of the radio frequency line is wound into a coil shape to form a balanced balun, and the other section of the radio frequency line is connected to the phase shifter and the winding end of the radio frequency line forming the balanced balun. And at the winding-out end of the radio frequency wire forming the balance balun, the interior of the radio frequency wire is divided into an outer conductor and an inner conductor, the inner conductor is connected with the first steel sheet, and the outer conductor is connected with the second steel sheet. Therefore, by connecting the inner conductor and the outer conductor at the winding-out end of the balanced balun with different steel sheets, even if the currents transmitted by the inner conductor and the outer conductor are different in magnitude due to different conductivity of the inner conductor and the outer conductor (generally, the magnitude of the current transmitted by the inner conductor is larger than that of the current transmitted by the outer conductor), the currents transmitted by the inner conductor and the outer conductor can be balanced by the balanced balun and tend to be the same, so that the direction of an antenna signal is prevented from being deviated due to the currents of different magnitudes, and the directional transmission of the antenna signal is realized.
Illustratively, continuing to refer to fig. 1, the antenna may include a reflector and a radiating element, the reflector being a device for reflecting antenna signals in the antenna, and the radiating element being a device for transceiving antenna signals in the antenna. Where the phase shifter may be located within the reflector and the balanced balun may be located within the radiating element, rather than all being located within the radiating element. Therefore, the concentrated heating of the phase shifter and the balanced balun is effectively avoided, the radiating efficiency of the antenna is improved, the situation that the antenna cannot normally work due to overheating is avoided, and the working efficiency of the antenna is improved.
Further exemplarily, as shown in fig. 1, the antenna may further include a support shaft, and the support shaft may be a carbon fiber beam, and has the characteristics of high strength and light weight. The reflector and the radiation unit are disposed side by side on a support shaft. So, use each antenna element of back shaft series connection, make each part arrange along the axial, can pull down each part along the axial when not using the antenna, conveniently accomodate the antenna.
Further illustratively, as shown in fig. 1, a second housing may be further included in the reflector, and a phase shifter may be fixed inside the second housing for adjusting the phase of the antenna. In an example, the antenna may include two sets of antenna units, each set of antenna unit includes the first antenna steel strip, the second antenna steel strip, the active array, the capacitive loading unit, and the balanced balun, and devices corresponding to the two sets of antenna units may be located in the radiation unit. Under the condition, two ports can be formed in the phase shifter, the two ports are respectively connected with one end of each of two radio frequency wires, the other ends of the two radio frequency wires are respectively connected with winding ends of two balance baluns corresponding to the two sets of antenna units, and winding ends of the two balance baluns are connected with two active arrays corresponding to the two sets of antenna units.
Further illustratively, with continued reference to fig. 1, the radiating element may further comprise a first housing, the balanced balun, the active vibrator, and the capacitive loading element being secured within the first housing. The first housing may be made of an insulating material, and the shape of the first housing may be a cylindrical housing as illustrated in fig. 1, or may be a housing with other shapes, such as a square, a rectangle, an oval, and the like, without limitation.
In the embodiment of the present application, the shapes and positions of the first steel plate, the second steel plate and the capacitive loading unit may be set empirically by those skilled in the art. For example, as shown in fig. 1 with continued reference, the first and second steel plates may be rectangular in shape and not in contact, with one end of the first and second steel plates being fixed to an inner sidewall of the first housing of the radiating unit. Accordingly, the capacitive loading unit may comprise a rectangular third steel plate, both ends of which are fixed to the first housing and arranged axially with respect to the first and second steel plates. Therefore, when current flows through the three steel sheets, a first capacitor is formed between the third steel sheet and the first steel sheet, and a second capacitor is formed between the third steel sheet and the second steel sheet.
Further exemplarily, as shown in fig. 1, the radiating element may further include a coupling element, where the coupling element is located on the other side of the capacitive loading element opposite to the plane formed by the first steel plate and the second steel plate, and is used to further widen the operating bandwidth of the antenna. In one example, the coupling unit may include a fourth steel plate, which may be a circular steel plate structure (or other shapes) and fixed on the cylindrical outer side of the first housing, and may be fixed on the cylindrical upper bottom surface in the form of an end cap when the antenna is vertically placed. And the fourth steel sheet and the capacitive loading unit are also kept parallel, so that a third capacitor can be formed between the third steel sheet and the fourth steel sheet when current flows through the fourth steel sheet and the third steel sheet.
Further illustratively, and with continued reference to fig. 1, the first and second antenna steel strips may be secured to the outer side wall of the first housing with the first and second antenna steel strips offset a first distance in the direction of the support axis. Wherein the first distance may be set to a distance between 5cm and 10cm, and preferably may be set to 8 cm. Therefore, when the antenna is vertically placed, the first antenna steel belt happens to be positioned under the second antenna steel belt, namely, the projections of the first antenna steel belt and the second antenna steel belt on the horizontal plane are overlapped.
In one example, the length of the second antenna steel strip may be less than the length of the first antenna steel strip for ease of storage.
One possible implementation manner, fig. 2 exemplarily shows a schematic structural diagram of an antenna rigid belt provided in the embodiment of the present application, and the steel belt shown in fig. 2 may be a structure in which two steel sheets are stacked, and this structure may ensure that the steel belt is not broken when being bent for many times, and the steel belt is sheathed with a heat-shrinkable sleeve and a plastic top cap, so as to protect the steel belt structure, improve appearance quality, and prolong service life.
Illustratively, with continued reference to fig. 1, the reflector further includes a radio frequency port on the exterior of the second housing for transmitting signals from, or received signals from, the device to which the antenna is connected to the antenna, as shown in fig. 1.
In addition, a fourth antenna steel strip can be arranged outside the reflector and used for reflecting the antenna signals, and the number of the fourth antenna steel strips can be set according to the intensity of the reflected signals. For example, if the strength of the reflected signal is strong, 2 fourth antenna steel strips may be disposed on the cylindrical outer wall of the second housing at 90 degrees; if the strength of the reflected signal is weak, 4 fourth antenna steel strips may be arranged and disposed on the cylindrical outer wall of the second housing at 45 degrees.
For example, a first heat dissipation member may be provided at an outer side of the first housing for dissipating heat of the radiation unit. When the antenna is vertically placed, the first heat dissipation member is arranged close to the cylindrical bottom surface of the first shell.
Further exemplarily, a second heat dissipation member may be further provided at an outer side of the second housing for heat dissipation of the reflector. When the antenna is vertically placed, the second heat dissipation member is arranged close to the cylindrical bottom surface of the second shell.
Fig. 3 schematically illustrates a structural diagram of another antenna provided in an embodiment of the present application, and as shown in fig. 3, the antenna may further include N directing units, in addition to the radiating unit, the reflector and the support shaft, where the N directing units, the radiating unit and the reflector are sequentially arranged on the support shaft side by side, and N is a positive integer greater than or equal to 1. Each guiding unit comprises a third shell and a third antenna steel strip, the third antenna steel strip is fixed outside the third shell, and the first side wing and the second side wing of the third antenna steel strip are arranged at 180 degrees. The number of the third antenna steel belts is two, and the third antenna steel belts are arranged outside the third shell at 90 degrees. As the antenna shown in fig. 3, there are 4 directing units for controlling the transmitting direction of the antenna signal in the antenna unit and enhancing the strength of the signal. As shown in figure 3, the guiding units can be combined into a group, and the middle parts of the guiding units are connected by a buckle, so that the guiding units are convenient to disassemble. When the antenna is used, a specific number of guide units can be connected according to requirements. For example, when the antenna signal is strong, one group of steering elements may be connected, and when the antenna signal is weak, two groups of steering elements may be connected.
Fig. 4 is a schematic diagram illustrating a receiving and unfolding shape of an antenna according to an embodiment of the present application, in which an antenna steel strip in the antenna may be made of an elastic material. In fig. 4, (a) shows a folded shape of the antenna, and in fig. 4, (B) shows an unfolded shape of the antenna, as shown in fig. 4 (a) and 4 (B):
when the antenna is folded, the end, which is not fixed, of the antenna steel belt in the antenna is bent towards the supporting shaft, so that the first side wing and the second side wing of the antenna steel belt are folded to the supporting shaft, and the antenna is in a folded umbrella shape. For example, the end of the first antenna steel strip, which is not fixed, of the first side wing and the second side wing in the radiation unit is folded inwards to be close to the support shaft, the end of the second antenna steel strip, which is not fixed, of the radiation unit is folded inwards to be close to the upper half part of the first side wing and the second side wing of the first antenna steel strip, and the nylon strip fixes the parts of the first antenna steel strip and the second antenna steel strip. Correspondingly, the unfixed ends of the first side wing and the second side wing of the fourth antenna steel strip in the reflector and the third antenna steel strip in the leading unit are folded inwards to be tightly attached to the supporting shaft, and the nylon strip fixes the fourth antenna steel strip and the third antenna steel strip.
In an alternative embodiment, the guiding unit, the radiation unit and the reflector may be disassembled respectively, so that the guiding unit is grouped into two, and the reflector and the radiation unit are grouped into one, and the disassembled guiding unit, radiation unit and reflector are respectively accommodated. For example, fig. 5 exemplarily shows a schematic structural diagram of an antenna centralized storage provided by an embodiment of the present application, as shown in fig. 5:
when the antenna is unfolded, the unfixed end and the fixed end of the antenna steel strip in the antenna are in a straight line, and the straight line is perpendicular to the supporting shaft. For example, in a state where the antenna steel band is fixed using the nylon band, the nylon band is unfastened, and since each antenna steel band is made of an elastic material, the antenna steel band can be directly flicked to take an opened umbrella shape.
In the embodiment, the balanced balun, the capacitive loading unit and the active oscillator are arranged, so that when the antenna is in a working state, the first steel sheet and the second steel sheet in the active oscillator can cooperate with the capacitive loading unit to form a capacitor, and further, the input impedance of the antenna can be changed by cooperating with other devices in the antenna without introducing a broadband matcher, thereby realizing the frequency band expansion of the antenna and effectively widening the frequency band of the antenna. Further, by connecting the inner conductor and the outer conductor at the winding-out end of the balanced balun with different steel sheets, even if the currents transmitted through the inner conductor and the outer conductor are different due to different electric conductivity of the inner conductor and the outer conductor, the currents transmitted through the inner conductor and the outer conductor can be balanced by the balanced balun and tend to be the same, so that the direction of an antenna signal is prevented from being deviated due to the currents of different magnitudes, and the directional transmission of the antenna signal is realized.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.
Claims (10)
1. An antenna, comprising: the device comprises a phase shifter, a balanced balun, a first antenna steel belt, a second antenna steel belt, an active oscillator and a capacitive loading unit;
each of the first antenna steel strip and the second antenna steel strip comprises a first side wing and a second side wing, the active oscillator comprises a first steel strip and a second steel strip, the first side wing of the first antenna steel strip is connected with the first steel strip, the second side wing of the first antenna steel strip is connected with the second steel strip, the first side wing of the second antenna steel strip is connected with the second side wing of the second antenna steel strip through the capacitive loading unit, and a plane formed by the first steel strip and the second steel strip is parallel to the capacitive loading unit;
the phase shifter is connected with the balanced balun through a radio frequency line, the balanced balun is realized by winding the radio frequency line into a coil, and at the winding-out end of the balanced balun:
the outer conductor of the radio frequency wire is connected with the first steel sheet, and the inner conductor of the radio frequency wire is connected with the second steel sheet.
2. The antenna of claim 1, wherein the antenna comprises a reflector and a radiating element, the reflector being a device for reflecting antenna signals in the antenna, the radiating element being a device for transceiving antenna signals in the antenna;
the phase shifter is located within the reflector;
the balanced balun, the first antenna steel strip, the second antenna steel strip, the active oscillator and the capacitive loading unit are located in the radiation unit.
3. The antenna of claim 2, wherein the radiating element further comprises a coupling element;
the coupling unit is located on one side, opposite to a plane formed by the first steel sheet and the second steel sheet, of the capacitive loading unit and is parallel to the capacitive loading unit.
4. The antenna of claim 3, further comprising a support axis on which the reflector and the radiating element are disposed side-by-side;
the radiating element further comprises a first shell, the balanced balun, the active oscillator and the capacitive loading unit are located in the first shell, the first antenna steel strip and the second antenna steel strip are located outside the first shell, the first side wing and the second side wing of the first antenna steel strip are deployed at 180 degrees, the first side wing and the second side wing of the second antenna steel strip are deployed at 180 degrees, one end of the first side wing and one end of the second side wing of the first antenna steel strip and one end of the first side wing and one end of the second side wing of the second antenna steel strip are fixed on the outer side wall of the first shell, and the one end of the first side wing of the first antenna steel strip and one end of the first side wing of the second antenna steel strip are staggered by a first distance in the direction of the supporting shaft.
5. The antenna of claim 4, wherein the radiating element further comprises a first heat dissipation member proximate the first housing.
6. The antenna of claim 2, wherein the reflector further comprises a second housing and a second heat dissipation member, the second heat dissipation member being proximate the second housing.
7. The antenna of claim 2, wherein the reflector further comprises a radio frequency port located outside the second housing and connected to the phase shifter for transmitting signals from or received antenna signals to the device to which the antenna is connected.
8. The antenna of claim 4, further comprising N directing units, wherein the N directing units, the radiating unit, and the reflector are arranged side by side in sequence on the support shaft, and N is a positive integer greater than or equal to 1;
the guiding unit is used for controlling the transmitting direction of the antenna signal in the antenna and enhancing the strength of the signal.
9. The antenna of claim 8, wherein the guide unit comprises a third housing and a third antenna steel strip, the third antenna steel strip is disposed at 180 degrees between the first wing and the second wing, and one end of the first wing and one end of the second wing of the third antenna steel strip are fixed to an outer sidewall of the third housing.
10. The antenna according to any of claims 1 to 9, wherein the antenna steel strips in the antenna are made of an elastic material;
when the antenna is folded:
one end, which is not fixed, of the antenna steel strip in the antenna is bent towards the supporting shaft, so that the first side wing and the second side wing of the antenna steel strip are folded to the supporting shaft, and the antenna is in a folded umbrella shape;
when the antenna is deployed:
the end, which is not fixed, of the antenna steel strip in the antenna and the fixed end of the antenna steel strip are in a straight line, and the straight line is perpendicular to the supporting shaft.
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| CN202111573951.4A CN114256606B (en) | 2021-12-21 | 2021-12-21 | Antenna |
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