CN114284709B - Radiating element, antenna and base station - Google Patents
Radiating element, antenna and base station Download PDFInfo
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- CN114284709B CN114284709B CN202111563400.XA CN202111563400A CN114284709B CN 114284709 B CN114284709 B CN 114284709B CN 202111563400 A CN202111563400 A CN 202111563400A CN 114284709 B CN114284709 B CN 114284709B
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Abstract
The invention provides a radiation unit, an antenna and a base station, wherein the radiation unit comprises two dipoles which are orthogonally arranged in polarization, the dipoles comprise two mutually symmetrical radiation arms, the radiation arms comprise a radiation ring and a radiation sheet which is arranged in the radiation ring, and the radiation sheet is physically connected and conducted with the radiation ring through an inductive structure conductor. The radiation unit of the invention forms an equivalent parallel RLC resonant circuit structure through the radiation ring, the radiation sheet and the inductive structure conductor connecting the radiation ring and the radiation sheet, so as to realize band-pass filtering, and transmit external high-frequency signals without affecting the radiation performance of the radiation unit, thereby facilitating the co-array arrangement of the radiation unit of the invention as a low-frequency radiation unit and a high-frequency radiation unit.
Description
Technical Field
The invention relates to the technical field of mobile communication, in particular to a radiation unit, an antenna provided with the radiation unit and a base station provided with the antenna.
Background
With the rapid development of modern mobile communication technology, the demand of users for high-capacity, low-latency communication has increased, and thus, the fifth generation mobile communication network has grown. In the domestic 5G mobile communication network construction process, a plurality of network systems are required to cooperatively develop, for example, the 5G network and the 4G network work simultaneously; but different network systems need to adopt antennas with different frequency bands, so that the number of antennas on each base station site is increased sharply, the construction and maintenance cost of the antenna base station site is greatly increased, the waste of antenna environment resources is caused, and the urban appearance is influenced by excessive antennas. Therefore, the antenna with multiple systems is integrated into a whole in the industry so as to form a multi-frequency antenna with small size, common caliber and integration to meet the application requirements of mobile communication, and the problems of insufficient space, insufficient hanging height, poor coverage, poor performance and the like of the existing 5G antenna are solved.
Generally, the 4G antenna mainly adopts a low-frequency radiating element, and the 5G antenna mainly adopts a high-frequency radiating element, wherein the volume of the low-frequency radiating element is larger than that of the high-frequency radiating element. In the multi-frequency antenna, each radiation unit is placed in a limited space, when the low-frequency radiation unit and the high-frequency radiation unit are arranged in a common caliber mode, strong cross-band scattering interference exists, and the high-frequency radiation unit is inevitably shielded, so that the low-frequency radiation unit is excited by a high-frequency signal emitted by the high-frequency radiation unit to generate high-frequency current, the electrical performance of the multi-frequency antenna is affected, and the problems of deterioration of port isolation, pattern distortion and the like among different frequency band antennas are caused, so that the performance of a composite wave beam of the multi-frequency antenna is affected.
Disclosure of Invention
It is therefore a primary objective of the present invention to solve at least one of the above problems and provide a radiating element, an antenna and a base station.
In order to meet the purposes of the invention, the invention adopts the following technical scheme:
one of the objects of the present invention is to provide a radiating element comprising two dipoles arranged orthogonally in polarization, said dipoles comprising two mutually symmetrical radiating arms, said radiating arms comprising a radiating loop and a radiating patch arranged within said radiating loop, said radiating patch being in physical connection with said radiating loop via an inductive structural conductor.
Further, the inductive structure conductor is repeatedly bent and formed by the linear body.
Specifically, the inductive structure conductor is formed by repeatedly bending a linear body to form a plurality of extending branches, and transition branches are formed between two adjacent extending branches due to end-to-end connection.
Preferably, the extension branch is in a straight line shape or an arc shape or a U shape, and the transition branch is in a straight line shape or an arc shape.
Specifically, a plurality of inductive structure conductors are uniformly arranged between the radiation ring and the radiation piece.
Preferably, the outer contour of the radiation piece is arranged at equal intervals with the inner contour of the radiation ring.
Further, the dipole further comprises a feeding piece and a dielectric plate for coupling and feeding the radiating arm, the radiating arm is arranged on the back surface of the dielectric plate, the feeding piece is arranged on the front surface of the dielectric plate, and the feeding piece and the radiating arm form a parallel coupling relation.
Further, the feeding piece comprises a feeding branch and a coupling branch, the feeding branch is electrically connected with the inner conductor of the coaxial cable, and the coupling branch is coupled with the radiation ring of the first radiation arm of the dipole in parallel.
Specifically, the number of the coupling branches is two, the two coupling branches extend towards two sides relative to the axial direction of the feed-in branches, and the two coupling branches are correspondingly coupled with different positions of the radiation ring respectively.
Further, the feed-in branches are arranged at the polarized centers where the two dipoles are intersected and extend to the second radiation arms of the dipoles along the polarized axes where the two dipoles are located, and the feed-in branches of the two feed pieces corresponding to the two dipoles are spatially intersected.
Specifically, the inner conductor of the coaxial cable penetrates through the dielectric plate from the back surface of the dielectric plate to be electrically connected with the feed branch of the feed piece arranged on the front surface of the dielectric plate.
An antenna according to one of the objects of the present invention comprises a reflecting plate, a low-frequency radiating element array and a high-frequency radiating element array, each radiating element array comprising a plurality of radiating elements fed in parallel with each other, the radiating elements in the low-frequency radiating element array being the radiating element according to any one of the previous objects.
It is an object of the present invention to provide a base station provided with an antenna as described in the previous object for transmitting signals which are passed by the base station.
Compared with the prior art, the invention has the following advantages:
firstly, the radiation ring of the radiation arm of the radiation unit is physically connected with the radiation piece arranged in the radiation ring through the inductive structure conductor, so that the radiation arm is equivalent to a parallel RLC resonant circuit, and the radiation arm has a band-pass filtering function, so that when the radiation unit is transmitted by an external high-frequency signal, the radiation unit transmits waves to the external high-frequency signal, the radiation performance of the radiation unit is not influenced, and the radiation unit is convenient to be arranged in a co-array manner with the high-frequency radiation unit.
And secondly, a clearance space is arranged between the radiation ring of the radiation unit and the radiation sheet arranged in the radiation ring, and the clearance space can block external high-frequency signals from the radiation unit less, so that wave transmission is facilitated.
And the structure and layout form of the dipole of the radiating unit are simple, so that the radiating arms of the dipole of the radiating unit are convenient to process and produce through processes such as metal plates, the production cost is saved, and the large-scale manufacturing is convenient.
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 invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:
fig. 1 is a schematic perspective view of a radiation unit according to an exemplary embodiment of the present invention.
Fig. 2 is a perspective schematic view of a radiation element according to an exemplary embodiment of the invention from a first reference plane perspective.
Fig. 3 is an enlarged view of a portion a of fig. 2.
Fig. 4 is a horizontal plane diagram of a radiating element operating in the 820MHz-960MHz band according to an exemplary embodiment of the present invention.
Fig. 5 is a pattern when a high frequency radiating element operating in the 3.4GHz band is not co-arrayed with a low frequency radiating element and a pattern when a high frequency radiating element operating in the 3.4GHz band is co-arrayed with a low frequency radiating element of the present invention.
Fig. 6 is a pattern when a high frequency radiating element operating in the 3.6GHz band is not co-arrayed with a low frequency radiating element and a pattern when a high frequency radiating element operating in the 3.6GHz band is co-arrayed with a low frequency radiating element of the present invention.
Fig. 7 is a pattern when a high frequency radiating element operating in the 3.8GHz band is not co-arrayed with a low frequency radiating element and a pattern when a high frequency radiating element operating in the 3.8GHz band is co-arrayed with a low frequency radiating element of the present invention.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for explaining 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 expressly stated otherwise, as understood by those skilled in the art. 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. The term "and/or" as used herein includes all or any element and all combination of one or more of the associated listed items.
It will be understood by those skilled in the art that 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 unless defined otherwise. 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 radiating element, a radiating arm of a dipole of the radiating element is provided with a radiating sheet in a radiating ring, and the radiating sheet is physically connected and conducted with the radiating ring through an inductive structure conductor, so that the radiating arm is structurally equivalent to a parallel RLC resonant circuit, has a band-pass filtering function on external high-frequency signals, and realizes high-frequency wave permeability, thereby being convenient for being used as a low-frequency radiating element and a high-frequency radiating element to be arranged in a co-array manner.
In an exemplary embodiment of the present invention, in combination with fig. 1 and 2, the radiation unit 10 includes two dipoles 20, and the two dipoles 20 are disposed in a polarization-orthogonal manner. The dipole 20 includes two radiating arms 30 symmetrical to each other and a feeding portion 40 for feeding the radiating arms 30.
Referring to fig. 2, the radiating arm 30 includes a radiating loop 31 and a radiating patch 32 disposed inside the radiating loop 31, and the radiating patch 32 is in direct physical connection with the radiating loop 31 through an inductive structure conductor 33. The radiation piece 32 is arranged in the radiation ring 31, an annular groove 34 is formed between the radiation ring 31 and the radiation piece 32, and the annular groove 34 formed by the radiation ring 31 and the radiation piece 32 is equivalent to a capacitor.
The radiation ring 31 has a ring-like structure, and the radiation sheet 32 has a sheet-like structure. Specifically, the shape of the outer contour of the radiation piece 32 corresponds to the shape of the inner contour of the radiation ring 31. An annular groove 34 is arranged between the radiation ring 31 and the radiation sheet 32, and when the external high-frequency signal is transmitted through the radiation unit 10 of the invention, the annular groove 34 can reduce the blocking of the external high-frequency signal and improve the wave-transmitting effect of the radiation unit 10.
In one embodiment, the outer contour of the radiation piece 32 is arranged at equal intervals from the inner contour of the radiation ring 31, that is, the width of each portion of the annular groove 34 is equal. Preferably, the radiation ring 31 has a rectangular shape, and the radiation piece 32 has a rectangular shape.
In one embodiment, the inner contour of the radiation ring 31 has a polygonal structure or a circular structure or an elliptical structure, and the outer contour of the radiation piece 32 has a polygonal structure or a circular structure or an elliptical structure corresponding to the shape of the inner contour of the radiation ring 31.
The inductive-structure conductor 33 is arranged between the radiating patch 32 and the radiating loop 31, the inductive-structure conductor 33 being equivalent to an inductance for directly physically connecting the radiating patch 32 and the radiating loop 31. The inductive structure conductor 33 has a meander line structure, and specifically, the inductive structure conductor 33 is repeatedly meander-formed by the linear body 331. The inductive structure conductor 33 is in a meander line structure, the volume of the inductive structure conductor 33 is small, and when an external high-frequency signal is transmitted through the radiation unit 10 of the present invention, the inductive structure conductor 33 can reduce the blocking of the external high-frequency signal, so that the radiation unit 10 of the present invention can transmit waves conveniently. Preferably, the linear body 331 is a radial line or a metal line.
The inductive structure conductor 33 is formed by reciprocally bending the linear body 331, the inductive structure conductor 33 forms a plurality of extending branches 332 due to reciprocally bending, and two adjacent extending branches 332 are connected to each other through a transition branch 333, so that the inductive structure conductor 33 forms a wave structure. Preferably, the wave structure is a wave structure or a square wave structure or a sawtooth wave structure, and even is a spring structure.
In one embodiment, the extending branch 332 has a shape such as a straight line segment shape, an arc shape, an L shape, or a U shape; the transition branch 333 is in a straight line segment shape or an arc shape. That is, the extension branch 332 and the transition branch 333 cooperate to form the inductive-structure conductors 33 of various wave structures.
In the exemplary embodiment of the present invention, the extension branch 332 has a U shape, and the transition branch 333 has a straight line segment shape, so that the inductive structural conductor 33 has a square wave shape.
Thus, the annular groove 34 formed between the radiating loop 31 and the radiating patch 32 of the radiating arm 30 is equivalent to a capacitance, while the inductance structure conductor connecting the radiating loop 31 and the radiating patch 32 is equivalent to an inductance, and the interaction of the radiating loop 31, the radiating patch 32, and the inductance structure conductor 33 is equivalent to a parallel RLC resonant circuit. When the external high-frequency signal transmits the radiation arm 30, the radiation arm 30 equivalent to the parallel RLC resonant circuit has a band-pass filtering function, and the external high-frequency signal transmits the radiation arm 30 without affecting the radiation performance of the radiation arm 30.
A plurality of inductive structure conductors 33 are arranged between the radiating plate 32 and the radiating ring 31, and the plurality of inductive structure conductors 33 are uniformly arranged between the radiating plate 32 and the radiating ring 31.
In the exemplary embodiment of the present invention, the outer contour of the radiating fin 32 is square, the inner contour of the radiating loop 31 is square, the radiating arm 30 is provided with four inductive structure conductors 33, each side of the square radiating fin 32 is provided with one inductive conductor structure 33, and the four sides of the inner contour of the square radiating loop 31 are correspondingly connected with the inductive conductor structures 33.
The plurality of inductive structure conductors 33 are arranged between the radiation sheet 32 and the radiation ring 31, so that the effect of an equivalent parallel RLC resonant circuit can be improved, the band-pass filtering performance of the radiation arm 30 can be enhanced, and the wave-transmitting effect of the radiation arm 30 on external high-frequency signals can be improved, so that the radiation performance of the radiation unit 10 is not influenced by the high-frequency signals emitted by the high-frequency radiation units when the high-frequency radiation units are arranged in a common array.
The feed 40 of the dipole 20 includes a feed 41 for coupling the radiating arms 30 to feed and a coaxial cable 42 for conducting electricity to the feed 41. The two radiating arms 30 of the dipole 20 are arranged on a first reference plane, and the feeding element 41 is arranged on a second reference plane, the first reference plane and the second reference plane being parallel to each other. The feeding element 41 and the radiating arm 30 are respectively arranged on different reference planes, so that the matching degree and isolation degree of the radiating unit 10 can be improved, and the mutual influence of the feeding element 41 and the radiating arm 30 on the electrical performance is avoided.
In the invention, the coaxial cable 42 is arranged for the radiation unit 10, and the balun is not arranged for the radiation unit 10, so that the influence of the balun on the radiation performance of the radiation unit 10 is avoided, the influence on the radiation performance of the radiation unit 10 can be reduced, and the radiation performance of the radiation unit 10 is improved. Moreover, the coaxial cable 42 is small in size, lightweight, and easy to install, and convenient to assemble and use on a large scale in the radiating element 10 or antenna. Moreover, the coaxial cable 42 may also provide less blocking of external high frequency signals relative to the balun structure, such that the radiating element 10 facilitates transmission of external high frequency signals.
Referring to fig. 1, fig. 2 and fig. 3, wherein the dashed line portion in fig. 2 and fig. 3 represents the structure of the feeding member disposed on the second reference plane, and the solid line portion represents the structure of the radiating arm disposed on the first reference plane. The feed 41 comprises a feed stub 441 and a coupling stub 442 connected to each other, the feed stub 441 being connected to the coaxial cable 42, the coupling stub 442 coupling the feed parallel to the radiating loop 31 of one of the radiating arms 30 of the dipole 20.
Specifically, the two radiating arms of the dipole 20 are called a first radiating arm 301 and a second radiating arm 302, respectively, and the coupling branch 442 of the feeding member 41 and a radiating loop of the first radiating arm 301 (called a first radiating loop 3011) form a parallel coupling relationship to feed the first radiating arm 301 in a coupling manner.
The extension path of the coupling branch 442 is correspondingly set up with the arrangement track of the first radiation loop 3011, and in the projection direction of the second reference plane, the projection of the coupling branch 442 overlaps with the projection of the radiation line constituting the first radiation loop 3011. In one embodiment, the lateral width of the coupling stub 442 is equal to the width of the line of radiation of the first radiating loop 3011 or the lateral width of the coupling stub 442 is greater than the width of the line of radiation of the first radiating loop 3011.
The feeding member 41 may be provided with a plurality of coupling stubs 442, each of the plurality of coupling stubs 442 being coupled in parallel with the line of radiation constituting the first radiating loop 3011, the plurality of coupling stubs 442 being coupled in parallel with the line of radiation of the first radiating loop 3011 at different positions. The plurality of coupling branches 442 are connected to the feeding branch 441, so as to feed the feeding branch 441 with the plurality of coupling branches 442, and the plurality of coupling branches 442 can uniformly couple and feed the first radiation arm 301, so as to improve the uniformity of the current obtained by the first radiation arm 301. Preferably, the plurality of coupling branches 442 are connected to the feeding branch 441 at the same point, so that the feeding branch 441 distributes the same amount of current to the plurality of coupling branches 442.
In an exemplary embodiment of the present invention, the feeding element 41 includes two coupling branches 442, where the two coupling branches 442 are connected to the feeding branch 441 at the same point, and the two coupling branches 442 extend toward two sides with respect to the axial direction of the feeding branch 441, so that the two coupling branches 442 extend along different directions of the arrangement track of the first radiating loop 3011, respectively, so that the two coupling branches 442 are coupled in parallel with the radial lines of different sections of the first radiating loop 3011. In one embodiment, the two coupling branches 442 and the feed branch 441 form a Y-shaped structure. Preferably, the two coupling branches 442 extend in opposite directions.
The feed branch 441 is disposed at the center of polarization where the two dipoles 20 intersect, and the feed branch 441 extends along the polarization axis of the dipole 20. Specifically, one end of the feed-in branch 441 (referred to as the first end 4411) extends to the first radiating arm 301, and the other end of the feed-in branch 441 (referred to as the second end 4412) extends to the second radiating arm 302. The feed stub 441 is connected at a first end 4411 to the coupling stub 442 and at a second end 4412 to the inner conductor of the coaxial cable 42.
Specifically, the second end 4412 of the feed stub 441 extends along the polarization axis of the polarization to the region where the radiation ring of the second radiation arm 302 (referred to as the second radiation ring 3022) is located, the second radiation ring 3022 is provided with a feeding tab along the polarization axis at an end near the first radiation ring 3011, and in the projection direction of the first reference plane, the projection of the second end 4412 falls into the projection of the feeding tab.
The feeding element 41 and the coaxial cable 42 of the feeding portion 40 feed two radiating arms 30 according to the following principle: the external feeding part feeds a current into the coaxial cable 42, the coaxial cable 42 feeds a current into the feeding stub 441 of the feeding member 41 connected with the inner conductor of the coaxial cable 42, the feeding stub 441 outputs the current fed therein into the coupling stub 442 connected therewith, the coupling stub 442 couples the current into the corresponding section of the first radiating loop 3011 of the first radiating arm 301, and after the first radiating arm 301 is coupled to obtain the current, a part of the current is excited to the second radiating arm 302, so that both radiating arms 30 of the dipole 20 feed a current, so that the radiating unit 10 radiates signals to the outside.
The two dipoles 20 are respectively provided with one feeding member, namely a first feeding member 411 and a second feeding member 412, and the feeding branches 4111 of the first feeding member 411 and the feeding branches 4121 of the second feeding member 412 are spatially intersected and mutually avoided, that is, the two feeding branches are practically disjoint. The first power feeding member 411 and the second power feeding member 412 are arranged in a ±45° polarization.
In an exemplary embodiment of the present invention, the radiating element 10 further includes a dielectric plate 50, the first reference plane is disposed on the opposite side of the dielectric plate 50, and the second reference plane is disposed on the front side of the dielectric plate 50, that is, the radiating arm 30 of the dipole 20 is disposed on the opposite side of the dielectric plate 50, and the feeding member 41 of the dipole 20 is disposed on the front side of the dielectric plate 50.
Specifically, the feeding branch 4111 of the first feeding member 411 is completely disposed on the front surface of the dielectric plate 50, the feeding branch 4121 of the second feeding member 412 is configured to spatially intersect with the feeding branch 4111 of the first feeding member 411, so that the section of the feeding branch 4121 of the second feeding member 412 intersecting with the feeding branch 4111 of the first feeding member 411 is transferred to the opposite surface of the dielectric plate 50 through the metallized via 52, and the feeding branch 4121 of the second feeding member 412 is transferred to the front surface of the dielectric plate 50 through the metallized via 52 after avoiding the feeding branch 4111, so as to spatially intersect the feeding branch 4111 of the first feeding member 411 with the feeding branch 4121 of the second feeding member 412, i.e. so that the feeding branch 4111 of the first feeding member 411 and the feeding member 412 do not substantially intersect with the feeding branch 4121.
The coaxial cable 42 is electrically connected to a feed branch 441 of the feed member 41 disposed on the front surface of the dielectric plate 50. Specifically, the coaxial cable 42 extends to the opposite side of the dielectric plate 50, the outer conductor of the coaxial cable 42 is connected to the opposite side of the dielectric plate 50, and the inner conductor of the coaxial cable 42 passes through the dielectric plate 50 through the via hole 51 penetrating through the dielectric plate 50, so that the inner conductor is electrically connected to the feed-in branch 441.
In one embodiment, the coaxial cable 42 extends to the opposite side of the dielectric plate 50, the outer conductor of the coaxial cable 42 is connected to the opposite side of the dielectric plate 50, and the inner conductor of the coaxial cable 42 is connected to the feed branch 441 of the feed 41 disposed on the opposite side of the dielectric plate 50 through the probe penetrating the dielectric plate 50.
Referring to fig. 4, fig. 4 is a horizontal plane directional diagram of a radiation unit according to an exemplary embodiment of the present invention operating in the 820MHz-960MHz frequency band, and it can be seen from this figure that when the radiation unit according to the present invention is in the 820MHz-960MHz frequency band, the half power beam of the radiation unit is about 70 °, and the directional diagram performance is better.
In one embodiment, the radiating arms of the two dipoles arranged on the opposite side of the dielectric plate are formed by integral sheet metal.
In one embodiment, the radiating element is a 4G radiating element operating at 820MHz-960 MHz.
The invention also provides an antenna which comprises a reflecting plate, and a low-frequency radiating element row and a high-frequency radiating element row which are arranged on the reflecting plate. The low frequency radiating element row includes a plurality of low frequency radiating elements fed in parallel with each other, the low frequency radiating elements being the radiating elements described above, and the high frequency radiating element row includes a plurality of high frequency radiating elements fed in parallel with each other. The low-frequency radiating unit is arranged adjacent to the high-frequency radiating unit, and the projection of the low-frequency radiating unit on the reflecting plate completely covers or partially covers the projection of the high-frequency radiating unit adjacent to the low-frequency radiating unit on the reflecting plate.
The low-frequency radiating element array and the high-frequency radiating element array are all arranged in a collinear way along the same axis, and the low-frequency radiating elements of the low-frequency radiating element array are the radiating elements, so that the low-frequency radiating elements can be equivalent to a parallel RLC resonant circuit through combination of radiating rings, radiating sheets and inductive structure conductors connecting the radiating rings and the radiating sheets, band-pass filtering is realized, and high-frequency signals emitted by the high-frequency radiating elements are transmitted without influencing the radiation performance of the low-frequency radiating elements and the high-frequency radiating elements.
In one embodiment, the low-frequency radiation unit has better wave-transmitting performance for high-frequency signals in the 3.4-3.8GHz frequency band.
Referring to fig. 5, a pattern when a high frequency radiating element operating in a 3.4GHz band is not co-arrayed with a low frequency radiating element and a pattern when a high frequency radiating element operating in a 3.4GHz band is co-arrayed with a low frequency radiating element of the present invention are shown, wherein a solid line represents a pattern when a high frequency radiating element operating in a 3.4GHz band is not co-arrayed with a low frequency radiating element, and wherein a broken line represents a pattern when a high frequency radiating element operating in a 3.4GHz band is co-arrayed with a low frequency radiating element of the present invention. From the figure, the pattern when the high-frequency radiating element operating in the 3.4GHz frequency band is not co-arranged with the low-frequency radiating element is basically the same as the pattern when the high-frequency radiating element operating in the 3.4GHz frequency band is co-arranged with the low-frequency radiating element of the invention, and the radiation performance of the high-frequency radiating element operating in the 3.4GHz frequency band is not influenced by the low-frequency radiating element of the invention.
Referring to fig. 6, a pattern when a high frequency radiating element operating in a 3.6GHz band is not co-arrayed with a low frequency radiating element and a pattern when a high frequency radiating element operating in a 3.6GHz band is co-arrayed with a low frequency radiating element of the present invention are shown, wherein a solid line represents a pattern when a high frequency radiating element operating in a 3.6GHz band is not co-arrayed with a low frequency radiating element, and wherein a broken line represents a pattern when a high frequency radiating element operating in a 3.6GHz band is co-arrayed with a low frequency radiating element of the present invention. From the figure, the pattern when the high-frequency radiating element operating in the 3.6GHz frequency band is not co-arranged with the low-frequency radiating element is basically the same as the pattern when the high-frequency radiating element operating in the 3.6GHz frequency band is co-arranged with the low-frequency radiating element of the invention, and the radiation performance of the high-frequency radiating element operating in the 3.4GHz frequency band is not influenced by the low-frequency radiating element of the invention.
Referring to fig. 7, a pattern when a high frequency radiating element operating in a 3.8GHz band is not co-arrayed with a low frequency radiating element and a pattern when a high frequency radiating element operating in a 3.8GHz band is co-arrayed with a low frequency radiating element of the present invention are shown, wherein a solid line represents a pattern when a high frequency radiating element operating in a 3.8GHz band is not co-arrayed with a low frequency radiating element, and wherein a broken line represents a pattern when a high frequency radiating element operating in a 3.8GHz band is co-arrayed with a low frequency radiating element of the present invention. From the figure, the pattern when the high-frequency radiating element operating in the 3.8GHz frequency band is not co-arranged with the low-frequency radiating element is basically the same as the pattern when the high-frequency radiating element operating in the 3.8GHz frequency band is co-arranged with the low-frequency radiating element of the invention, and the radiation performance of the high-frequency radiating element operating in the 3.8GHz frequency band is not influenced by the low-frequency radiating element of the invention.
Therefore, when the low-frequency radiating element and the high-frequency radiating element are co-arrayed, the radiation performance such as the pattern of the high-frequency radiating element is not affected, and the low-frequency radiating element is convenient to be co-arrayed with the high-frequency radiating element.
The invention also provides a base station, which is provided with the antenna, and receives or transmits the antenna signals of the corresponding frequency bands through the antenna.
In summary, the radiating element of the present invention forms an equivalent parallel RLC resonant circuit structure through the radiating loop, the radiating sheet, and the inductive structure conductor connecting the radiating loop and the radiating sheet, so as to implement bandpass filtering, and transmit external high-frequency signals without affecting the radiating performance of the radiating element, so that the radiating element of the present invention is arranged as a co-array of low-frequency radiating elements and high-frequency radiating elements.
The above description is only illustrative of the preferred embodiments of the present invention and of the principles of the technology employed. It will be appreciated by persons skilled in the art that the scope of the invention referred to in the present invention is not limited to the specific combinations of the technical features described above, but also covers other technical features formed by any combination of the technical features described above or their equivalents without departing from the inventive concept described above. Such as the above-mentioned features and the features having similar functions (but not limited to) of the invention.
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 example forms of implementing the claims.
Claims (10)
1. The radiating unit comprises two dipoles which are orthogonally arranged in polarization, and is characterized in that the dipoles comprise two mutually symmetrical radiating arms, each radiating arm comprises a radiating ring and a radiating sheet arranged in the radiating ring, and the radiating sheet is physically connected and conducted with the radiating ring through an inductive structure conductor;
an annular groove is formed between the radiation ring and the radiation sheet, the annular groove is equivalent to a capacitor, an inductive structure conductor connecting the radiation ring and the radiation sheet is equivalent to an inductor, and the interaction of the radiation ring, the radiation sheet and the inductive structure conductor is equivalent to a parallel RLC resonant circuit;
a plurality of inductive structure conductors are uniformly arranged between the radiation ring and the radiation piece;
the dipole further comprises a feeding piece and a dielectric plate, wherein the feeding piece is used for feeding the radiation arm in a coupling mode, the radiation arm is arranged on the reverse side of the dielectric plate, the feeding piece is arranged on the front side of the dielectric plate, and the feeding piece and the radiation arm form a parallel coupling relation;
the feed piece comprises a feed branch and a coupling branch; the feed-in branches are arranged at the crossed polarization centers of the two dipoles and extend to the second radiation arms of the dipoles along the polarization axes of the two dipoles, and the feed-in branches of the two feed pieces corresponding to the two dipoles are crossed in space.
2. The radiating element of claim 1, wherein the inductive structural conductor is repeatedly bent from a linear body.
3. The radiating element of claim 2, wherein the inductive structural conductor is formed by a plurality of extending branches formed by reciprocating bending of the linear body, and a transition branch is formed between two adjacent extending branches due to end-to-end connection.
4. A radiating element as claimed in claim 3, wherein said extension branch is rectilinear or arcuate or U-shaped and said transition branch is rectilinear or arcuate.
5. The radiating element of claim 1, wherein the radiating patch outer contour is disposed at equidistant intervals from the inner contour of the radiating collar.
6. The radiating element of claim 1, wherein the feed stub is electrically connected to an inner conductor of a coaxial cable, and the coupling stub is coupled in parallel with a radiating loop of a first radiating arm of a dipole.
7. The radiating element of claim 1, wherein the number of coupling branches is two, the two coupling branches extend towards two sides relative to the axial direction of the feed-in branches, and the two coupling branches are respectively arranged in a coupling way corresponding to different positions of the radiating ring.
8. The radiating element of claim 6, wherein the inner conductor of the coaxial cable extends through the dielectric plate from a back side of the dielectric plate for electrical connection with a feed branch of a feed member disposed on a front side of the dielectric plate.
9. An antenna comprising a reflecting plate, a low-frequency radiating element array and a high-frequency radiating element array, each radiating element array comprising a plurality of radiating elements fed in parallel with each other, characterized in that: the radiation element of the low frequency radiation element column employs the radiation element of any one of claims 1 to 8.
10. A base station, characterized in that the base station is provided with an antenna as claimed in claim 9 for transmitting signals which are passed by the base station.
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