CN114361779A - Antenna device and low-frequency wave-transparent oscillator - Google Patents
Antenna device and low-frequency wave-transparent oscillator Download PDFInfo
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- CN114361779A CN114361779A CN202111656226.3A CN202111656226A CN114361779A CN 114361779 A CN114361779 A CN 114361779A CN 202111656226 A CN202111656226 A CN 202111656226A CN 114361779 A CN114361779 A CN 114361779A
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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
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/48—Earthing means; Earth screens; Counterpoises
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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
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
- H01Q1/521—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure reducing the coupling between adjacent antennas
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
- H01Q15/0006—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices
- H01Q15/0053—Selective devices used as spatial filter or angular sidelobe filter
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/0006—Particular feeding systems
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/24—Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q7/00—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/16—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole
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Abstract
The invention relates to an antenna device and a low-frequency wave-transmitting oscillator. The four inner ring circuits are arranged on the supporting body, the inner ring circuits are arranged in the outer ring circuits in a one-to-one correspondence mode, the inner ring circuits and the outer ring circuits are arranged at intervals, and the outline of the inner ring circuits is provided with at least one concave portion which is concavely arranged towards the center of the inner ring circuits. The inner loop circuit is arranged in the outer loop circuit and can be regarded as an inductance-capacitance circuit, an equivalent circuit is formed by the inner loop circuit and the outer loop circuit, a high-frequency resonance point can be added, the characteristic of transmitting high-frequency electromagnetic waves is added, and the electromagnetic waves generated by the high-frequency oscillator which is nested below the low-frequency wave-transparent oscillator can effectively penetrate through the high-frequency wave-transparent oscillator, so that good radiation is generated to space, and particularly, the high-frequency wave-transparent oscillator is applied to a 5G array, has a transmission effect on a 5G frequency band and realizes smaller antenna volume.
Description
Technical Field
The invention relates to the technical field of antenna communication, in particular to an antenna device and a low-frequency wave-transmitting oscillator.
Background
The rapid development of mobile communication technology promotes the continuous innovation of social informatization level, antennas of multiple frequency bands need to be integrated together to form an antenna array covering the whole network in the existing base station antenna, and more importantly, the mutual influence among the antenna units of different frequency bands needs to be solved in order to realize the miniaturization and the broadband of the antenna units of each frequency band. Nowadays, a plurality of existing 2G, 3G, 4G and 5G systems in mobile communication work simultaneously, and it is expected that a plurality of systems coexist simultaneously in a long time in the future, which also brings about the problem of shortage of base station site resources and sky resources. Therefore, in order to relieve the resource shortage problem, solve the increasing communication demand of people, improve the utilization rate of the sky resource and enable the common-caliber antenna which can effectively reduce the size of the antenna to gradually enter the visual field of people.
Disclosure of Invention
The invention provides an antenna device and a low-frequency wave-transparent oscillator, which are used for solving one or more technical problems in the prior art.
The technical scheme is as follows: a low frequency wave-transparent transducer, said low frequency wave-transparent transducer comprising: a support body; the two groups of dipoles are arranged on the support body, each group of dipoles comprises two radiation arms which are oppositely arranged, and each radiation arm is a closed outer loop circuit; the four closed inner ring circuits are arranged on the supporting body, the inner ring circuits are arranged inside the outer ring circuit in a one-to-one correspondence mode, the inner ring circuits and the outer ring circuit are arranged at intervals, and at least one concave portion which is concavely arranged towards the center of the outer ring circuit is arranged on the outline of the inner ring circuit.
The low-frequency wave-transparent oscillator is characterized in that an inner loop circuit is arranged in an outer loop circuit at an interval, the inner loop circuit can be regarded as an inductance-capacitance circuit, an equivalent circuit is formed by the inner loop circuit and the outer loop circuit, namely, the structure of a parallel LC loop, a high-frequency resonance point can be added, the characteristic of transmitting high-frequency electromagnetic waves is added, the electromagnetic waves generated by the high-frequency oscillator which is arranged below the low-frequency wave-transparent oscillator in a nested mode can effectively penetrate, and therefore good radiation is generated to space.
In one embodiment, the inner ring line is a polygon, and each side of the polygon is provided with at least one concave part; alternatively, the inner ring line is circular or elliptical.
In one embodiment, the inner ring line is square, and the concave part is arranged in the middle of each side of the square.
In one embodiment, the line width of the outer loop circuit is D, wherein the line width D is 1mm to 1.8 mm. Specifically, the line width D of the outer loop circuit is 1.3mm, 1.4mm, or 1.5 mm.
In one embodiment, a filtering part is arranged on the outer loop circuit.
In one embodiment, the filtering part comprises at least two straight line segments extending in a fold line or arranged in a reciprocating bending and extending manner; or the filtering part comprises at least two curve sections which are arranged at included angles; or the filtering part comprises at least two straight line sections and at least two curve sections, and the straight line sections and the curve sections are alternately arranged and connected with each other.
In one embodiment, the outer ring lines at two opposite corners of the dipole in the same group are provided with bending lines extending towards the central position of the support body.
In one embodiment, the low-frequency wave-transparent oscillator further comprises a feeding balun, the feeding balun is connected with the supporting body, and the feeding balun is used for feeding the two groups of dipoles.
In one embodiment, the feed balun comprises two orthogonally arranged balun bodies which are in plug-in fit, each balun body is provided with two feed parts, and the two feed parts are used for feeding two radiation arms in a group of dipoles respectively.
In one embodiment, a feeder line electrically connected with the feed network is arranged on one side surface of the balun body, and two metal grounding pieces arranged oppositely at intervals are arranged on the other side surface of the balun body; the two metal grounding pieces are in coupling fit with the feeder line, the top end of each metal grounding piece is provided with a feeding portion, and the bottom end of each metal grounding piece is welded and grounded with the grounding plate.
In one embodiment, a filter branch electrically connected with the feeder line is further arranged on the other side surface of the balun body; the filtering branch is L-shaped.
In one embodiment, the metal grounding plates are provided with saw-tooth structures on the sides close to each other.
An antenna device comprises the low-frequency wave-transparent oscillator.
In the antenna device, the inner loop circuit is arranged in the outer loop circuit at an interval, the inner loop circuit can be regarded as an inductance-capacitance circuit, and forms an equivalent circuit with the outer loop circuit, namely a parallel LC loop structure, a high-frequency resonance point can be added, the characteristic of transmitting high-frequency electromagnetic waves is added, and the electromagnetic waves generated by the high-frequency oscillator nested below the low-frequency wave-transmitting oscillator can effectively transmit, so that good radiation is generated to the space, and particularly, the antenna device is applied to a 5G array, has a transmission effect to a 5G frequency band, and realizes a smaller antenna volume.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention.
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a low-frequency wave-transparent oscillator according to an embodiment of the present invention;
fig. 2 is a schematic top view of a low-frequency wave-transparent resonator according to an embodiment of the invention;
fig. 3 is a schematic structural diagram of one side surface of one of the balun sections of the low-frequency wave-transparent oscillator according to an embodiment of the present invention;
fig. 4 is another schematic side view of one balun of the low-frequency wave-transparent resonator according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of one side surface of another balun body of the low-frequency wave-transparent oscillator according to the embodiment of the invention;
fig. 6 is another schematic side view of another balun of the low-frequency wave-transparent resonator according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a ground plate of a low-frequency wave-transparent oscillator according to an embodiment of the invention;
FIG. 8 is a standing wave curve of a low frequency wave-transparent vibrator according to an embodiment of the present invention;
FIG. 9 is a transmission curve of the low frequency wave-transparent oscillator of the embodiment of the present invention at 3.2GHz-3.6 GHz;
FIG. 10 is a horizontal plane directional diagram of the low frequency wave-transparent oscillator of one embodiment of the present invention at 0.69GHz-0.96 GHz;
FIG. 11 is a diagram of a high frequency oscillator alone applied to a 3.2GHz-3.6GHz horizontal plane in accordance with an embodiment of the present invention;
fig. 12 is a horizontal plane directional diagram of the high-frequency oscillator at 3.2GHz-3.6GHz when the low-frequency wave-transmitting oscillator is located above the high-frequency oscillator according to the embodiment of the invention.
10. A low-frequency wave-transparent oscillator; 11. a support body; 111. a first slot; 12. a radiation arm; 121. a filtering section; 122. bending the circuit; 13. an inner loop circuit; 131. a recess; 14. a feed balun; 141. a balun body; 1411. a feeding section; 1412. a card slot; 1413. a feed line; 1414. a metal ground plate; 1415. a filtering branch; 1416. a connecting portion; 142. a ground plate; 1421. a matching circuit; 1422. metallizing the via hole; 1423. a second slot.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.
In the conventional technology, the high-frequency oscillator and the low-frequency oscillator may be arranged on the same reflection plate in a nested form or a stacked form. When the high-frequency oscillator and the low-frequency oscillator generate mutual coupling, and electromagnetic waves radiated by the high-frequency oscillator irradiate on the traditional low-frequency oscillator, induction current can be generated on the low-frequency oscillator, so that the directional diagram of the high-frequency oscillator generates distortion.
Referring to fig. 1 and fig. 2, fig. 1 shows a schematic structural diagram of a low-frequency wave-transparent oscillator 10 according to an embodiment of the invention, and fig. 2 shows a schematic top-view structural diagram of the low-frequency wave-transparent oscillator 10 according to an embodiment of the invention. Based on this, in one embodiment, an antenna arrangement is provided comprising a low frequency wave-transparent element 10. Certainly, in actual use, the antenna can also comprise a high-frequency oscillator, so that the antenna has the performance of multiple systems and multiple frequency bands and meets the use requirement. The low-frequency wave-transparent oscillator 10 is specifically applied to, for example, the low-frequency band: 690MHz-960MHz, it can be through the electromagnetic wave that high frequency oscillator radiated, the 5G frequency channel of 3.2GHz-3.6GHz is specific for permeating through, can solve the mutual coupling problem of high frequency oscillator and low frequency wave-transparent oscillator 10, avoid the directional diagram of high frequency oscillator to distort, make the electromagnetic wave that sets up the high frequency oscillator production below the wave-transparent oscillator 10 of low frequency effectively permeate through, produce good radiation to the space, specific for example apply to 5G array, can have the transmission effect to the 5G frequency channel, realize littleer product volume.
Specifically, the antenna device in this embodiment may adopt a pattern arrangement manner to make the low-frequency wave-transparent oscillator 10 and the high-frequency oscillator form an array, which can effectively narrow the width of the antenna array cross section, thereby realizing miniaturization and light weight, and being suitable for large-scale use.
Specifically, the low-frequency wave-transparent vibrator 10 includes a support 11, two sets of dipoles with orthogonal polarizations, and four closed inner-loop lines 13. Two groups of dipoles are arranged on the support body 11, and each group of dipoles comprises two oppositely arranged radiation arms 12. Each radiating arm 12 is a closed outer loop circuit. The four inner ring circuits 13 are arranged on the support body 11, the inner ring circuits 13 are arranged in the outer ring circuits in a one-to-one correspondence mode, the inner ring circuits 13 and the outer ring circuits are arranged at intervals, and the outline of each inner ring circuit 13 is provided with at least one concave portion 131 which is concave towards the center of the inner ring circuit 13.
In the low-frequency wave-transparent oscillator 10, the inner loop circuit 13 is arranged in the outer loop circuit, the inner loop circuit 13 can be regarded as an inductance-capacitance circuit, and forms an equivalent circuit with the outer loop circuit, that is, the structure of a parallel LC loop is adopted, a high-frequency resonance point can be added, so that the characteristic of transmitting high-frequency electromagnetic waves is added, and the electromagnetic waves generated by the high-frequency oscillator nested below the low-frequency wave-transparent oscillator 10 can effectively transmit, so as to generate good radiation to the space, and particularly, for example, when the low-frequency wave-transparent oscillator is applied to a 5G array, the low-frequency wave-transparent oscillator can have a transmission effect to a 5G frequency band, and a smaller antenna volume is realized.
It should be noted that the closed outer loop circuit and the closed inner loop circuit 13 are both referred to as a complete closed loop circuit, that is, no broken notch is provided on the outline of the loop circuit.
The outer ring circuit and the inner ring circuit 13 may be made of a metal material such as copper or aluminum, and are provided on the support 11 by plating, for example. The support 11 may be made of a dielectric material such as FR4, and is used to support the radiation arm 12 and the inner loop 13. The support 11 includes, but is not limited to, a plate or a sheet. Specifically, the outer loop circuit and the inner loop circuit 13 are PCB boards disposed on a substrate made of FR4 dielectric material with a dielectric constant of 4.4, and have the advantages of light weight, low cost, easy installation, and the like, and the radiation surface has the transmission performance for electromagnetic waves in a frequency band of 3.2GHz-3.6 GHz.
It should be noted that, the contour structure of the concave portion 131 is specifically, for example, three or more straight line segments connected in sequence, or is provided as an arc segment, or is provided in a form that at least one straight line segment and one arc segment are combined with each other, the purpose of providing the concave portion 131 is to increase the length of the inner loop 13, and the specific design shape thereof is not limited herein. The specific example of the concave portion 131 in this embodiment is formed by sequentially connecting three straight line segments, and an included angle between two adjacent straight line segments is 90 degrees, so that the design form of the concave portion 131 is relatively regular, which can facilitate production and processing, and the tuning work of the resonant frequency is easier, which is beneficial to improving the work efficiency.
In one embodiment, the inner loop 13 is a polygon, each side of the polygon being provided with at least one recess 131. Specifically, when each side of the polygon is provided with at least two recesses 131, the at least two recesses 131 on each side of the polygon are arranged at regular intervals; when one concave portion 131 is provided on each side of the polygon, the concave portion 131 on each side of the polygon is located at a central portion thereof.
In one embodiment, when the inner ring line 13 has a circular or elliptical shape, at least two recesses 131 are equally spaced on the outline of the circular or elliptical shape. By controlling the number of the recesses 131 in this manner, the length of the inner loop 13 can be controlled accordingly, and the resonance frequency can be adjusted accordingly. Further, by setting the size of the inner loop circuit 13 to adjust the interval between the inner loop circuit 13 and the outer loop circuit accordingly, the resonance frequency can be adjusted as well. When the design of the inner loop circuit 13 is more regular, the tuning work of the resonance frequency is easier, which is advantageous to improve the work efficiency.
Referring to fig. 2, in one embodiment, the inner circuit 13 is square, and a recess 131 is formed in the middle of each side of the square. Therefore, the resonance frequency can be conveniently and correspondingly debugged according to the high-frequency band needing to be transmitted, and the debugging workload is greatly reduced.
In addition, in order to reduce the coupling between the high-frequency oscillator and the low-frequency wave-transmitting oscillator 10, the shielding area of the high-frequency oscillator by the low-frequency wave-transmitting oscillator 10 can be reduced.
In one embodiment, the line width of the outer loop line is D. Wherein the line width D is 1mm to 1.8 mm. Specifically, the line width D of the outer loop circuit is 1.3mm, 1.4mm, or 1.5 mm. Therefore, the line width D of the outer ring circuit is extremely small, the extremely small line width D can furthest reduce the metal shielding of the high-frequency oscillator nested below the line width D while ensuring certain radiation performance of the line width D, and the adverse effect of the line width D on the radiation performance of the high-frequency oscillator can be effectively reduced.
Optionally, the line width D may also be set according to λ, where the line width D is specifically, for example, less than 0.01 λ, and λ is a wavelength of the central frequency point. In this way, by designing the line width of the outer loop line to be small, the coupling between the high-frequency oscillator and the low-frequency wave-transmitting oscillator 10 is reduced, and the directional diagram of the high-frequency oscillator is improved.
Referring to fig. 1 and 2, in an embodiment, a filter portion 121 is disposed on the outer loop circuit, which can greatly reduce mutual coupling between the high frequency oscillator for transmitting the electromagnetic wave in the high frequency band and the low frequency oscillator, and ensure that a directional diagram of the high frequency oscillator for transmitting the electromagnetic wave in the high frequency band is not distorted. Moreover, the gain of the low-frequency wave-transparent resonator 10 can be increased.
When the high frequency band changes, the length of the extending track of the filtering part 121 can be correspondingly adjusted, so that the antenna meets the use requirements of multiple systems and multiple frequency bands, the directional diagram of the high frequency oscillator of each frequency band cannot be distorted, and the radiation performance is good. For example, when the frequency of the high frequency band becomes small, the length of the extended trace of the filter part 121 is extended accordingly; when the frequency of the high band becomes large, the length of the extended locus of the filter part 121 is shortened accordingly.
The installation position and number of the filter part 121 on the radiating arm 12 can be flexibly designed or adjusted according to the actual use requirement, specifically, for example, the filter part 121 is installed at a position on the outer loop circuit where the mutual coupling between the low frequency and the high frequency is strong. In addition, the outer loop circuit is, for example, a square, and the number of the filter portions 121 is not limited to one, and may be provided on at least one side of the square, as shown in fig. 2, the filter portions 121 are provided on each side of the square. The specific structural form of the filter portions 121 on each side may be the same or different, and is not limited herein, and may be set according to the mutual coupling strength of the low frequency and the high frequency at the position, for example, the structural form of the filter portions 121 on two sides is similar to a saw-tooth shape, and the structural form of the filter portions 121 on the other two sides is similar to a needle shape.
The structure of the filtering portion 121 can be flexibly adjusted according to actual processing and design requirements, and only the requirement that the electromagnetic wave of the high frequency band can be filtered is met.
Optionally, the filtering portion 121 includes at least two linear segments extending in a zigzag manner or disposed in a reciprocating bending manner, so that the at least two linear segments extending in a straight manner are connected to each other to form the filtering portion 121.
When the filtering portion 121 includes at least two segments of straight line segments extending in a zigzag manner, the two adjacent segments only need to satisfy that the phases of the coupling currents flowing through the two adjacent segments are opposite and offset each other, so as to achieve the filtering effect, and the specific connection mode and the arrangement form are not limited.
When the filtering portion 121 includes at least two straight segments extending in a reciprocating manner, the straight segments extending in a reciprocating manner only need to be opposite in phase so that coupling currents flowing through two adjacent straight segments can be offset, and therefore the filtering effect can be achieved.
Alternatively, two straight line segments are arranged in parallel and spaced apart from each other, another straight line segment is arranged between the two spaced apart straight line segments and is connected to form a minimum bending unit, and at least two bending units are connected by using at least one straight line segment, thereby forming the filtering part 121.
Optionally, the filtering portion 121 includes at least two curved segments arranged at an included angle, such that at least two curved segments extending in a curved manner are connected to each other, thereby forming the filtering portion 121.
In addition, at least two curve segments only need to enable the phases of the coupling currents flowing through two adjacent curve segments to be opposite and mutually offset, so that the filtering effect is achieved, and the specific connection mode and the arrangement form are not limited.
Optionally, the filtering portion 121 includes at least two straight line segments and at least two curved line segments, and the straight line segments and the curved line segments are alternately disposed and connected to each other. Thus, at least two straight line segments extending in a straight line and at least two curved line segments extending in a curved line are alternately connected to each other, thereby forming the filtering part 121.
And at least two straight line sections and two curve sections only need to enable the phases of coupling currents flowing through the adjacent curve sections and the adjacent straight line sections to be opposite and mutually offset, so that the filtering effect is achieved, and the specific connection mode and the arrangement form are not limited.
Referring to fig. 1 and fig. 2, in an embodiment, the outer ring lines at two opposite corners of the same group of dipoles are provided with bending lines 122 extending toward the center of the supporting body 11. Specifically, the bending line 122 includes, but is not limited to, a U-shaped bending line and a W-shaped bending line, as long as the bending mode can be used to increase the length of the outer ring line, and the specific bending form is not limited herein. The purpose of the bent line 122 is to increase the length of the outer loop line, thereby increasing the surface current path and expanding the bandwidth.
Referring to fig. 1, 3 to 6, fig. 3 and 4 show schematic structural diagrams of two side surfaces of one of the balun sections 141 of the low-frequency wave-transmitting oscillator 10 according to an embodiment, and fig. 5 and 6 show schematic structural diagrams of two side surfaces of one of the balun sections 141 of the low-frequency wave-transmitting oscillator 10 according to an embodiment, in which the low-frequency wave-transmitting oscillator 10 further includes a feeding balun 14. A feeding balun 14 is connected to the support 11, the feeding balun 14 being used to feed both sets of dipoles. In this way, the supporting body 11 is supported by the feeding balun 14, and the two groups of dipoles are fed by the feeding balun 14.
It should be noted that the feeding balun 14 may be an existing feeding structure, and only needs to be able to feed two groups of dipoles, which is not limited herein.
Referring to fig. 1, 3-6, in one embodiment, the feeding balun 14 includes two orthogonally disposed balun sections 141 that are in a plug-in fit. Each balun section 141 is provided with two feeding sections 1411. The two feeding portions 1411 are used to feed the two radiating arms 12 in the group of dipoles, respectively.
Specifically, a clamping groove 1412 is formed in the center of the balun body 141, and the two clamping grooves 1412 are buckled with each other, so that the two radiation pieces are perpendicular to each other.
Referring to fig. 1, fig. 3 to fig. 7, fig. 7 is a schematic structural diagram illustrating a ground plate 142 of a low-frequency wave-transparent oscillator 10 according to an embodiment of the present invention, in an embodiment, a feeder line 1413 for electrically connecting to a feed network is disposed on one side surface of a balun body 141, and two metal ground plates 1414 disposed at an interval are disposed on the other side surface of the balun body 141. The two metal grounding strips 1414 are coupled and matched with the feeder line 1413, the top end of each metal grounding strip 1414 is provided with a feeding portion 1411, and the bottom end of each metal grounding strip 1414 is welded and grounded with the grounding plate 142.
Referring to fig. 3 to 6, in an embodiment, a filter stub 1415 electrically connected to the feeder 1413 is further disposed on the other side of the balun body 141. In particular, the filter stub 1415 includes, but is not limited to, an L-shape. Thus, the loaded filter stub 1415 can effectively reduce the surface current coupled to the feed line 1413 when the high-frequency oscillator is in operation, thereby improving the port isolation between the high-frequency and low-frequency radiating units. The filter branch 1415 may have other shapes, not limited to the L shape, and may be set according to actual requirements. In addition, one end of the filter stub 1415 is electrically connected to the feeder 1413, and the other end of the feeder 1413 is a free end.
Referring to fig. 3-6, in one embodiment, the side of the two metal grounding plates 1414 near each other is provided with a saw-tooth structure. Therefore, the length and the width of the sawtooth structure can be adjusted to change the reactance value of the sawtooth structure, so that the impedance matching of the radiating unit can be improved, and the matching degree of the sawtooth structure can be optimized.
Referring to fig. 3 to 6, further, the feeding balun 14 further includes a ground plate 142. The ground plate 142 is provided with two matching lines 1421 and two metalized vias 1422 electrically connected to the two matching lines 1421 respectively. The two matching lines 1421 are respectively soldered to the bottom ends of the two feeder lines 1413. The two metalized vias 1422 are electrically connected to the two coaxial lines, respectively, and are connected to the feeding network through the coaxial lines.
Referring to fig. 2 to 6, further, two first bumps are disposed at the top end of each balun body 141, two feeding portions 1411 are respectively disposed on the two first bumps, four first slots 111 are disposed on the supporting body 11 and correspond to the four first bumps, and the first bumps are inserted into the first slots 111 and then are correspondingly welded to the radiating arms 12 through the feeding portions 1411.
Referring to fig. 3 to fig. 7, in addition, two second bumps are disposed at the bottom end of each balun body 141, and a connecting portion 1416 disposed on the second bump is disposed at the bottom end of each metal grounding strip 1414. The ground plate 142 is provided with four second slots 1423 corresponding to the four second bumps, and the second bumps are inserted into the second slots 1423 and then are connected to the ground metal layer of the ground plate 142 by soldering through the connecting portions 1416.
Fig. 8 shows a standing wave curve of the low-frequency wave-transparent oscillator 10 according to an embodiment of the present invention, and the standing waves of the low-frequency wave-transparent oscillator 10 are all less than 1.5 in a frequency range of 690MHz to 960MHz, so that good impedance matching is achieved in a frequency band.
FIG. 9 is a transmission curve of the low frequency wave-transparent resonator 10 of the present invention at 3.2GHz-3.6 GHz; the characteristic curve simulates the transmission characteristic of the characteristic curve by setting a periodic master-slave boundary condition and Floquet port excitation, a high-frequency resonance point is generated at 3.4GHz, the return loss characteristics (S11) of the characteristic curve are less than 10dB in the range of 3.2GHz-3.55GHz, and the electromagnetic wave in the frequency band can effectively pass through the surface.
FIG. 10 is a horizontal plane directional diagram of the antenna of the present invention in a 690MHz-960MHz frequency band, with a half-power beam width of 67 ° -77 °, substantially meeting the radiation index of a base station antenna application.
FIG. 11 is a diagram of a high frequency oscillator alone applied to a 3.2GHz-3.6GHz horizontal plane in accordance with an embodiment of the present invention; fig. 12 is a horizontal plane directional diagram of the high-frequency oscillator at 3.2GHz-3.6GHz when the low-frequency wave-transmitting oscillator 10 is located above the high-frequency oscillator according to the embodiment of the invention. Comparing fig. 11 and fig. 12, it can be seen that, under the influence of the low-frequency wave-transmitting oscillator 10 of the present invention, the horizontal plane pattern half-power beam width of the high-frequency oscillator is narrowed and collapsed to some extent, but the overall radiation performance is good, and it can be considered that the low-frequency wave-transmitting oscillator 10 of the present invention has a small influence on the high-frequency oscillator, that is, the antenna device of the present invention can be considered to have a good transmission characteristic for the high-frequency electromagnetic wave in the frequency band of 3.2GHz to 3.6GHz, and can be widely applied.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.
Claims (13)
1. A low-frequency wave-transparent oscillator, characterized in that the low-frequency wave-transparent oscillator comprises:
a support body;
the two groups of dipoles are arranged on the support body, each group of dipoles comprises two radiation arms which are oppositely arranged, and each radiation arm is a closed outer loop circuit;
the four closed inner ring circuits are arranged on the supporting body, the inner ring circuits are arranged inside the outer ring circuit in a one-to-one correspondence mode, the inner ring circuits and the outer ring circuit are arranged at intervals, and at least one concave portion which is concavely arranged towards the center of the outer ring circuit is arranged on the outline of the inner ring circuit.
2. The low-frequency wave-transparent oscillator of claim 1, wherein the inner ring line is a polygon, and each side of the polygon is provided with at least one concave portion; alternatively, the inner ring line is circular or elliptical.
3. The low-frequency wave-transparent oscillator of claim 2, wherein the inner ring line is square, and the concave portion is provided at the middle part of each side of the square.
4. The low frequency wave-transparent oscillator of claim 1, wherein the line width of the outer loop circuit is D, wherein the line width D is 1mm to 1.8 mm.
5. The low-frequency wave-transparent oscillator according to claim 1, wherein the outer loop circuit is provided with a filtering part.
6. The low-frequency wave-transparent oscillator of claim 5, wherein the filtering part comprises at least two straight line segments extending in a zigzag manner or arranged in a reciprocating bending and extending manner; or the filtering part comprises at least two curve sections which are arranged at included angles; or the filtering part comprises at least two straight line sections and at least two curve sections, and the straight line sections and the curve sections are alternately arranged and connected with each other.
7. The low-frequency wave-transparent oscillator of claim 1, wherein the outer ring lines at two opposite corners of the same group of dipoles are provided with bending lines extending towards the center of the support body.
8. The low-frequency wave-transparent oscillator of claim 1, further comprising a feeding balun connected to the support body, the feeding balun being configured to feed both sets of dipoles.
9. The low-frequency wave-transparent oscillator of claim 8, wherein the feed balun comprises two orthogonal balun bodies in a splicing fit, each balun body is provided with two feed portions, and the two feed portions are used for feeding two radiation arms of a group of dipoles respectively.
10. The low-frequency wave-transparent oscillator of claim 9, wherein a feeder line electrically connected with a feed network is arranged on one side surface of the balun body, and two metal grounding plates arranged at intervals are arranged on the other side surface of the balun body; the two metal grounding pieces are in coupling fit with the feeder line, the top end of each metal grounding piece is provided with a feeding portion, and the bottom end of each metal grounding piece is welded and grounded with the grounding plate.
11. The low-frequency wave-transparent oscillator of claim 10, wherein a filter branch electrically connected with the feeder line is further arranged on the other side surface of the balun body; the filtering branch is L-shaped.
12. The low frequency wave-transparent oscillator of claim 10 wherein the metal grounding plates are provided with saw-tooth structures on the sides close to each other.
13. An antenna device, characterized in that it comprises a low frequency wave-transparent element according to any of claims 1 to 12.
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| CN114361779B (en) | 2022-11-29 |
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