CN118336376B - Wave-transparent low-frequency antenna and antenna assembly - Google Patents
Wave-transparent low-frequency antenna and antenna assembly Download PDFInfo
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- CN118336376B CN118336376B CN202410750913.9A CN202410750913A CN118336376B CN 118336376 B CN118336376 B CN 118336376B CN 202410750913 A CN202410750913 A CN 202410750913A CN 118336376 B CN118336376 B CN 118336376B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/20—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements characterised by the operating wavebands
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/002—Protection against seismic waves, thermal radiation or other disturbances, e.g. nuclear explosion; Arrangements for improving the power handling capability of an antenna
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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
- H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
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Abstract
The application provides a wave-transparent low-frequency antenna and an antenna assembly, the wave-transparent low-frequency antenna comprises a substrate, a first part of vibrators and a second part of vibrators. The first partial vibrator is arranged in a first area of the substrate, and a plurality of first disconnection points are arranged on the first partial vibrator; the first disconnection point is arranged on the outer side edge of the first part of vibrators; the first part of vibrators are further provided with a plurality of first filtering branches. The second partial vibrator is arranged in a second area of the substrate, and a plurality of second breaking points are arranged on the second partial vibrator; the second breaking point is arranged on the outer side edge of the second part of vibrators; the second part oscillator is further provided with a plurality of second filtering branches, and the number of types of the filtering branches contained in the second part oscillator is more than that of the filtering branches contained in the first part oscillator. According to the application, the first breaking point and the second breaking point are respectively arranged in the first part vibrator and the second part vibrator, so that wave transmission of different frequency bands is realized.
Description
Technical Field
The application relates to the field of wave-transparent low-frequency antennas, in particular to a wave-transparent low-frequency antenna and an antenna assembly.
Background
The wave transmission frequency band of the existing low-frequency wave transmission is single and limited, and is usually designed to cover only specific 3G or 4G or part of 5G frequency bands, so that the wave transmission capability in a wider frequency range cannot be realized. Particularly, in the middle frequency range of 1710MHz to 2170MHz and the high frequency range of 3300MHz to 3700MHz, the existing low-frequency vibrator can not meet the electromagnetic 'transparent' requirement in the whole frequency band.
Disclosure of Invention
In order to solve the problems in the prior art, the application provides a wave-transmitting low-frequency antenna and an antenna assembly, so as to improve the wave-transmitting performance of the wave-transmitting low-frequency antenna and simultaneously meet the electromagnetic 'transparent' requirements of medium frequency and high frequency.
The application provides a wave-transmitting low-frequency antenna, which comprises a substrate, a first part of vibrators and a second part of vibrators;
the substrate includes a first region and a second region arranged along a first direction; the first partial vibrator is arranged in a first area of the substrate, and a plurality of first disconnection points are arranged on the first partial vibrator; the first disconnection point is arranged on the outer side edge of the first part of vibrators; the first part of vibrators are also provided with a plurality of first filtering branches;
The second partial vibrator is arranged in a second area of the substrate, and a plurality of second breaking points are arranged on the second partial vibrator; the second breaking point is arranged on the outer side edge of the second part of vibrators; the second part vibrator is further provided with a plurality of second filtering branches, and the types of the branches of the second filtering branches contained in the second part vibrator are more than those of the branches of the first filtering branches contained in the first part vibrator.
In an embodiment, the number of second disconnection points is the same as the number of first disconnection points.
In an embodiment, the first partial vibrator includes a first radiator and a second radiator, and the first radiator and the second radiator are disposed on an upper surface of the substrate;
The first breaking point is arranged on a first side edge and/or a second side edge of the first radiator, and the first side edge is adjacent to the second side edge; the second radiator has the same structure as the first radiator; and is vertically symmetrical with the first radiator.
In an embodiment, the second partial vibrator includes a third radiator and a fourth radiator, and the third radiator and the fourth radiator are disposed on the upper surface of the substrate;
the second breaking point is arranged on a fifth side edge and a sixth side edge of the third radiator, and the fifth side edge and the sixth side edge are adjacent; the structure of the fourth radiator is the same as that of the third radiator; and is vertically symmetrical with the third radiator.
In an embodiment, the first disconnection point has a first preset interval; the second breaking point is provided with a second preset interval; the second preset interval is smaller than the first preset interval.
In an embodiment, the position of the first filtering branch corresponding to each of the first breaking points is disposed on the lower surface of the substrate.
In an embodiment, the first filtering branch is arranged in a shape of a Chinese character 'ji', and the width of the first filtering branch is consistent with the first preset interval.
In one embodiment, the second filtering branch includes filtering branch types including "several" type, "τ" type and "field" type; the positions of the second filtering branches in the shape of a Chinese character 'ji' corresponding to each second breaking point are arranged on the lower surface of the substrate, and the widths of the second filtering branches are consistent with the second preset intervals;
the tau-shaped second filtering branch and the field-shaped second filtering branch are arranged on the upper surface of the substrate.
In one embodiment, a first filtering unit and a second filtering unit are arranged on the lower surface of the substrate;
the first filtering unit is arranged corresponding to the inner side edge of the first part of vibrators; the first filtering unit comprises a plurality of first parasitic strips, and a third preset interval is arranged between the adjacent first parasitic strips;
the second filtering unit is arranged corresponding to the inner side edge of the second part of vibrators; the second filter unit includes a plurality of second parasitic strips with a fourth predetermined spacing between adjacent ones of the second parasitic strips.
The application also provides an antenna assembly, which comprises a first radiation unit, a second radiation unit and the wave-transmitting low-frequency antenna; the working frequency band of the wave-transparent low-frequency antenna is smaller than that of the first radiator, and the working frequency band of the first radiator is smaller than that of the second radiator.
According to the application, the first breaking point and the second breaking point are respectively arranged in the first part vibrator and the second part vibrator, so that wave transmission of different frequency bands is realized. The wave transmission performance of the first part oscillator is further improved by arranging the first filtering branch knot on the first part oscillator. The second filtering branches are arranged on the second part of vibrators, so that the wave transmission performance of the second part of vibrators is met, the number of types of the filtering branches contained in the second part of vibrators is more than that of types of the filtering branches contained in the first part of vibrators, meanwhile, the number of second disconnection points can be flexibly set according to the number of the first disconnection points, and the radiation performance of the wave transmission low-frequency antenna is optimized.
Drawings
Fig. 1 is a diagram showing the upper surface structure of a wave-transparent low-frequency antenna according to an embodiment of the present application.
Fig. 2 is a block diagram of an antenna assembly according to an embodiment of the present application.
Fig. 3 is a diagram showing a lower surface structure of a wave-transparent low-frequency antenna according to an embodiment of the present application.
Fig. 4 is a block diagram of a first balun balancer according to an embodiment of the present application.
Fig. 5 is a structural diagram of a second balun balancer according to an embodiment of the present application.
Fig. 6 is an overall structure diagram of a wave-transparent low-frequency antenna according to an embodiment of the present application.
Fig. 7 is a normalized radar cross-sectional area value of a wave-transparent low-frequency antenna according to an embodiment of the present application.
Fig. 8 is an impedance matching waveform diagram of a wave-transparent low-frequency antenna according to an embodiment of the application.
Fig. 9 is a radiation pattern of a wave-transparent low-frequency antenna according to an embodiment of the application.
Fig. 10 is a beam width contrast diagram of an antenna assembly according to an embodiment of the present application.
Description of the main reference signs
Wave-transparent low frequency antenna 100
Substrate 110
First partial vibrator 120
Second partial vibrator 130
First breaking point 121
Second breaking point 131
First filtering branch 122
First radiator 123
Second radiator 124
Third radiator 133
Fourth radiator 134
Second filtering branch 132
Second filtering unit 135
The first filtering unit 125
Second parasitic strap 135a
First parasitic stripe 125a
First balun balancer 150
Support member 140
Bottom plate 170
Second balun balancer 160
First radiating element 200
Antenna assembly 10
Second radiating element 300
The application will be further described in the following detailed description in conjunction with the above-described figures.
Detailed Description
The following description will make reference to the accompanying drawings to more fully describe the application. Exemplary embodiments of the present application are illustrated in the accompanying drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the exemplary embodiments set forth herein. These exemplary embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the application to those skilled in the art. Like reference numerals designate identical or similar components.
In the design of the staggered wave-transmitting low-frequency antenna, the high, medium and low-frequency wave-transmitting low-frequency antennas are staggered in the horizontal direction and the vertical direction, the array is flexible, the space can be effectively utilized, and the size of the whole wave-transmitting low-frequency antenna is reduced. But due to the mutual coupling between the dipole arms of the wave-transparent low-frequency antenna, the wave-transparent performance of the wave-transparent low-frequency antenna is disturbed. Therefore, in the existing staggered wave-transparent low-frequency antenna design, the same wave-transparent technology is often adopted for the medium/high-frequency wave-transparent low-frequency antennas with different frequency bands (for example, different numbers of circuit breaking points are introduced at the strongest induction current). Thus, the two sides of the middle low-frequency wave-transmitting low-frequency antenna have different numbers of breaking points. The radiation performance of the low-frequency wave-transmitting low-frequency antenna is obviously affected by the disconnection points at the two sides of the vibrator arm, and the vibrators at the left side and the right side have different numbers of disconnection points, so that the radiation pattern and cross polarization of the low-frequency antenna can be seriously deteriorated.
Referring to fig. 1 to 3, the present application proposes a wave-transparent low-frequency antenna 100, wherein the wave-transparent low-frequency antenna 100 includes a substrate 110, a first partial resonator 120 and a second partial resonator 130. The first partial vibrator 120 is disposed in a first region of the substrate 110, and a plurality of first disconnection points 121 are disposed on the first partial vibrator 120. The first breaking point 121 is arranged on the outer side of the first part of vibrators 120; the first partial vibrator 120 is further provided with a plurality of first filtering branches 122. The second partial vibrator 130 is disposed in a second area of the substrate 110, a plurality of second breaking points 131 are disposed on the second partial vibrator 130, and the second breaking points 131 are disposed on an outer side of the second partial vibrator 130. The number of second breaking points 131 is the same as the number of first breaking points 121; the second partial vibrator 130 is further provided with a plurality of second filtering branches 132, and the number of filtering branches contained in the second partial vibrator 130 is greater than the number of filtering branches contained in the first partial vibrator 120.
In this embodiment, the second partial vibrator 130 is generally used for transmitting high frequency (3300 MHz to 3700 MHz), the first partial vibrator 120 is generally used for transmitting medium frequency (1710 MHz to 2170 MHz), and the second partial vibrator 130 can improve the transmission performance of the second partial vibrator 130 to high frequency by setting the number of filtering branches included in the second partial vibrator 130 to be greater than the number of filtering branches included in the first partial vibrator 120.
In this embodiment, the first area where the first partial vibrator 120 is located and the second area where the second partial vibrator 130 is located may be symmetrically arranged. The first and second breaking points 121 and 131 may be respectively disposed at the strongest induced currents to achieve wave-transparent properties of the first and second partial vibrators 120 and 130. Wherein the number of the first breaking points 121 and the second breaking points 131 may be set to be the same.
For example, the wave-transparent low-frequency antenna 100 operates at a low frequency, the intermediate-frequency wave-transparent low-frequency antenna 100 is provided on the left side of the wave-transparent low-frequency antenna 100, and the high-frequency wave-transparent low-frequency antenna 100 is provided on the right side of the wave-transparent low-frequency antenna 100. The first partial vibrator 120 may be used for transmitting a medium frequency (1710 MHz to 2170 MHz), and the second partial vibrator 130 may be used for transmitting a high frequency (3300 MHz to 3700 MHz). 4 first breaking points 121 may be disposed at the strongest side of the first partial vibrator 120, and 4 second breaking points 131 may be disposed at the strongest side of the second partial vibrator 130. The number of the highest-frequency induction currents of the second partial vibrator 130 may be greater than the number of the highest-frequency induction currents of the first partial vibrator 120. Wave-transparent may be achieved by providing a second filtering stub 132 where other high frequency induced currents are strongest. According to the superposition principle, the radiation of two currents with equal magnitudes and opposite directions, which are close to each other, can cancel each other. The second partial vibrator 130 generates a high-frequency induced current and simultaneously forms a current flowing opposite to the second filtering branch 132, thereby inhibiting the coupling of different frequencies and realizing high-frequency wave transmission. Wherein the length of the second filtering branch 132 may be set according to a quarter wavelength of the corresponding induced current. Therefore, the number of the disconnection points of the vibrators on the left side and the right side of the wave-transmitting low-frequency antenna 100 is kept consistent and the disconnection points are positioned at similar positions, so that serious deterioration of the self radiation pattern and cross polarization of the asymmetric low-frequency vibrators can be effectively avoided.
Similarly, by setting the first filtering branch 122 at the strongest part of the intermediate frequency induction current of the first partial vibrator 120, when the intermediate frequency induction current is generated by the first partial vibrator 120, the first filtering branch 122 also forms a current flowing opposite to the intermediate frequency induction current, so as to offset the intermediate frequency induction current at the position, and further improve the intermediate frequency wave-transmitting performance of the first partial vibrator 120. Wherein, the length of the first filtering branch 122 may be set according to a quarter wavelength of the corresponding induced current.
The application realizes wave transmission of different frequency bands by respectively arranging the first breaking point 121 and the second breaking point 131 in the first partial vibrator 120 and the second partial vibrator 130. By providing the first filter stub 122 in the first partial vibrator 120, the wave-transmitting performance of the first partial vibrator 120 is further improved. By arranging the second filtering branches 132 on the second partial vibrators 130, the wave transmission performance of the second partial vibrators 130 is met, meanwhile, the number of the second breaking points 131 can be flexibly set according to the number of the first breaking points 121, and the radiation performance of the wave transmission low-frequency antenna 100 is optimized.
In an embodiment, the first partial vibrator 120 includes a first radiator 123 and a second radiator 124, and the first radiator 123 and the second radiator 124 are disposed on the upper surface of the substrate 110. The first breaking point 121 is disposed on a first side and a second side of the first radiator 123, and the first side and the second side are adjacent; the second radiator 124 has the same structure as the first radiator 123. And is vertically symmetrical with the first radiator 123.
In an embodiment, the second partial vibrator 130 includes a third radiator 133 and a fourth radiator 134, and the third radiator 133 and the fourth radiator 134 are disposed on the upper surface of the substrate 110. The second breaking point 131 is disposed on a fifth side and a sixth side of the third radiator 133, and the fifth side and the sixth side are adjacent; the fourth radiator 134 has the same structure as the third radiator 133. And is vertically symmetrical with the third radiator 133.
In this embodiment, the second filtering branch 132 may include a "several" shape, a "τ" shape, and a "field" shape. The first, second, third and fourth radiators 123, 124, 133 and 134 may be square in shape and are surrounded by four metal sides. For example, the first radiator 123 further includes a third side and a fourth side, the first side and the second side of the first radiator 123 are outer sides, and the third side and the fourth side are inner sides. The first disconnection point 121 is disposed on the first side and/or the second side of the first radiator 123. The widths of the third and fourth sides of the first radiator 123 may be set according to impedance characteristics, for example, in a stepped shape, so as to adjust impedance matching.
The third radiator 133 further includes a seventh side and an eighth side, the fifth side and the sixth side of the third radiator 133 are outer sides, and the seventh side and the eighth side are inner sides. The second breaking point 131 is disposed on the fifth side and/or the sixth side of the third radiator 133. The widths of the seventh and eighth sides of the third radiator 133 may be set according to the impedance characteristics, for example, in a stepped shape, so as to adjust the impedance matching. The second filtering branch 132 may be disposed at one or more of the fifth side, the sixth side, the seventh side, and the eighth side of the third radiator 133. For example, the "field" type filtering branches may be disposed at the fifth and sixth sides of the third radiator 133, and the "τ" type filtering branches may be disposed at the seventh and eighth sides of the third radiator 133.
In addition, the second radiator 124 is disposed to be identical in structure and vertically symmetrical to the first radiator 123, and the third radiator 133 is disposed to be identical in structure and vertically symmetrical to the fourth radiator 134. So that the first radiator 123 and the fourth radiator 134 constitute a-45 polarized dipole, and the second radiator 124 and the third radiator 133 constitute a 45 polarized dipole.
In one embodiment, the first breaking point 121 has a first preset interval; the second breaking point 131 has a second preset interval; the second preset interval is smaller than the first preset interval. The first preset interval may be determined according to the frequency of the first portion of the vibrators 120 that needs to be transmitted and the impedance characteristic of the wave-transmitting low-frequency antenna 100 itself. The second preset interval may be determined according to the frequency of the second partial vibrator 130 requiring wave transmission and the impedance characteristic of the wave-transmitting low frequency antenna 100 itself.
In an embodiment, the position of the first filtering branch 122 corresponding to each first breaking point 121 is disposed on the lower surface of the substrate 110.
In this embodiment, by disposing the first filtering branch 122 at the position corresponding to the first breaking point 121 on the lower surface of the substrate 110, when the first partial vibrator 120 generates the intermediate frequency induction current, the first filtering branch 122 at the position corresponding to the first breaking point 121 forms the current flowing opposite to the intermediate frequency induction current, so as to cancel the intermediate frequency induction current at the position, and improve the intermediate frequency wave-transmitting performance of the first partial vibrator 120.
In one embodiment, the first filtering branch 122 is arranged in a "several" shape, and the width of the second filtering branch 132 is consistent with the first preset interval.
In this embodiment, the length of the first filtering branch 122 in the shape of a "Chinese character" is equivalent to an inductance, and the width is equivalent to a capacitance. In this way, LC parallel resonance can be formed. Since the first preset interval is set according to the frequency of the intermediate frequency induction current, the width (or the interval) of the first filtering branch 122 is the same as the first preset interval, when the first partial vibrator 120 generates the intermediate frequency induction current, the first filtering branch 122 in the shape of a Chinese character 'ji' corresponding to the position of the first breaking point 121 also forms a current opposite to the direction of the first filtering branch, so as to offset the intermediate frequency induction current at the position, and improve the intermediate frequency wave-transmitting performance of the first partial vibrator 120.
In one embodiment, the second filtering branch 132 includes a filtering branch type that also includes a "few" shape; the second filtering branches 132 in the shape of a Chinese character 'ji' are arranged on the lower surface of the substrate 110 at positions corresponding to each second breaking point 131, and the width of each second filtering branch 132 is consistent with a second preset interval; the "τ" type second filter branch 132 and the "field" type second filter branch 132 are disposed on the upper surface of the substrate 110. In this way, the plurality of second filtering branches 132 may be reasonably arranged on the substrate 110.
In this embodiment, since the second preset interval is set according to the frequency of the high-frequency induction current, the width (or the interval) of the second filtering branch 132 is the same as the second preset interval, when the second partial vibrator 130 generates the high-frequency induction current, the second filtering branch 132 in the shape of a "several" corresponding to the position of the second breaking point 131 also forms a current flowing opposite to the second breaking point, so as to cancel the high-frequency induction current at the position, and improve the high-frequency wave-transmitting performance of the second partial vibrator 130.
In one embodiment, the lower surface of the substrate 110 is provided with a first filtering unit 125 and a second filtering unit 135. The first breaking point 121 is disposed on an outer side of the first portion resonator 120, and the first filtering unit 125 is disposed corresponding to an inner side of the first portion resonator 120; the first filter unit 125 includes a plurality of first parasitic strips 125a with a third predetermined interval between adjacent first parasitic strips 125 a. The second breaking point 131 is disposed on an outer side of the second partial resonator 130, and the second filtering unit 135 is disposed corresponding to an inner side of the second partial resonator 130. The second filter unit 135 includes a plurality of second parasitic strips 135a with a fourth preset interval between adjacent second parasitic strips 135 a.
In this embodiment, the first filtering unit 125 may be disposed corresponding to the positions of the third side and the fourth side of the first radiator 123 and the positions of the third side and the fourth side of the second radiator 124. The first filter unit 125 may be divided into a plurality of first parasitic strips 125a by providing notches having a first preset interval on the first filter unit 125. The size and position of the first preset interval may be set according to the frequency of wave transmission required, for example, the position of the first preset interval is set at the strongest position of the high-frequency induction current, and the size is set according to the high-frequency induction current. In this way, when the first partial vibrator 120 generates a high-frequency induction current, the plurality of first parasitic strips 125a also generate a current flowing in the opposite direction to the high-frequency induction current, and the high-frequency induction current at the position is canceled, thereby suppressing the influence of the first partial vibrator 120 on the high-frequency wave transmission. In addition, the notch is provided to divide the first filter unit 125 into a plurality of first parasitic strips 125a having a length less than a quarter wavelength of the high frequency, so as to disperse the coupling current of the first filter unit 125 and prevent the first filter unit 125 from generating secondary radiation.
The second filtering unit 135 may be disposed corresponding to positions of the seventh and eighth sides of the third radiator 133 and positions of the seventh and eighth sides of the fourth radiator 134. The second filter unit 135 may be divided into a plurality of second parasitic strips 135a by providing notches having a second preset interval on the second filter unit 135. The size and position of the second preset interval can be set according to the frequency of wave transmission required, for example, the position of the second preset interval is set at the strongest part of the medium frequency induction current, and the size is set according to the medium frequency induction current. In this way, when the second partial vibrator generates an intermediate frequency induced current, the second parasitic strips 135a also generate currents flowing in opposite directions to each other, and thus cancel the intermediate frequency induced current at that position, and suppress the influence of the second partial vibrator 130 on the intermediate frequency wave transmission. In addition, the second filter unit 135 can be divided into a plurality of second parasitic strips 135a with lengths less than a quarter wavelength of the intermediate frequency by providing notches, so as to disperse the coupling current of the second filter unit 135 and avoid the second filter unit 135 from generating secondary radiation. Referring to fig. 10, it can be seen that the first partial element 120 and the second partial element 130 on the left and right sides of the wave-transparent low frequency antenna 100 interfere with each other in wave-transparent performance, and the parasitic strips are provided to suppress the interference.
Referring to fig. 4 to 6, in an embodiment, the wave-transparent low frequency antenna 100 further includes a supporting part 140, a first balun balancer 150, and a second balun balancer 160; the first balun balancer 150 and the second balun balancer 160 are provided on the supporting member 140. A first end of the supporting member 140 is fixedly mounted to a lower surface of the substrate 110; the first balun balancer 150 is electrically connected to both the first radiator 123 and the fourth radiator 134; the second balun balancer 160 is electrically connected to both the second radiator 124 and the third radiator 133.
In this embodiment, the balun balancer may be implemented by a microstrip feed line and a two-wire structure. The supporting part 140 may include two dielectric plates cross-combined in a cross shape, and the first balun balancer 150 and the second balun balancer 160 are respectively provided on the surfaces of the two dielectric plates. By adjusting the width and length of the first balun balancer 150, the-45 ° polarized dipole impedance matching constituted by the first radiator 123 and the fourth radiator 134 can be adjusted. By adjusting the width and length of the second balun balancer 160, 45 ° polarized dipole impedance matching constituted by the second radiator 124 and the third radiator 133 can be adjusted. In order to ensure that the support member 140 may be mounted on the lower surface of the substrate 110, the first and second filter units 125 and 135 may be provided with a relief space at a position close to the support member 140.
FIG. 7 shows normalized radar cross-sectional area values of the wave-transparent low-frequency antenna 100 according to the present application, and it can be seen that the wave-transparent low-frequency antenna 100 has good wave-transparent performance in the intermediate frequency (1710 MHz to 2170 MHz) and high frequency (3300 MHz to 3700 MHz) ranges, and normalized values are less than or equal to-8 dB.
Fig. 8 shows the reflection coefficient of the wave-transparent low-frequency antenna 100 according to the present application, and it can be seen that the bandwidth ranges from 690MHz to 960MHz, the standing wave ratio is less than 1.50 (S11 is about-14 dB), and the signal transmission performance of the wave-transparent low-frequency antenna 100 is better.
Fig. 9 shows the radiation pattern of the inventive wave-transparent low-frequency antenna 100 when in operation, and it can be seen that the structure of the inventive wave-transparent low-frequency antenna 100 does not cause the deterioration of the radiation pattern and cross polarization (full frequency band < -18 dB).
In one embodiment, the wave-transparent low frequency antenna 100 further includes a bottom plate 170; a second end of the support member 140 is fixedly mounted to the base plate 170.
In this embodiment, the bottom plate 170 may be used to place the wave-transparent low-frequency antenna 100 on a plane or be fixedly mounted on a reflective plate, so as to improve the stability of the wave-transparent low-frequency antenna 100.
Referring to fig. 2, the present application further proposes an antenna assembly 10, where the antenna assembly 10 includes a first radiating element 200, a second radiating element 300, and the wave-transparent low-frequency antenna 100 described above; the operating frequency band of the wave-transparent low frequency antenna 100 is smaller than that of the first radiating element 200, and the operating frequency band of the first radiating element 200 is smaller than that of the second radiating element 300. The working frequency band of the wave-transparent low-frequency antenna 100 may be a low frequency (690 MHz-960 MHz), the working frequency band of the first radiation unit 200 may be an intermediate frequency (1710 MHz-2170 MHz), and the working frequency band of the second radiation unit 300 may be a high frequency (3300 MHz-3700 MHz). The number of the first radiating elements 200 may be plural, and the number of the second radiating elements 300 may be plural.
The detailed structure of the wave-transparent low-frequency antenna 100 can be referred to the above embodiments, and will not be described herein again; it can be understood that, since the above-mentioned wave-transparent low-frequency antenna 100 is used in the antenna assembly 10 of the present invention, the embodiments of the antenna assembly 10 of the present invention include all the technical solutions of all the embodiments of the wave-transparent low-frequency antenna 100, and the achieved technical effects are identical, and are not repeated herein.
Fig. 10 is a 3dB beamwidth comparison plot of the first radiating element 200 (1710 MHz to 2170 MHz) and the second radiating element 300 (3300 MHz to 3700 MHz) of the antenna assembly 10. It can be seen that the beam widths of the first and second radiating elements 200 and 300 are not significantly deteriorated, and the maximum beam width variation value is less than 4 °, and the wave transmission performance is excellent in the full frequency band.
Hereinabove, the specific embodiments of the present application are described with reference to the accompanying drawings. Those skilled in the art will appreciate that various modifications and substitutions can be made to the application in its specific embodiments without departing from the spirit and scope of the application. Such modifications and substitutions are intended to be included within the scope of the present application.
Claims (9)
1. The wave-transmitting low-frequency antenna is characterized by comprising a substrate, a first part of vibrators and a second part of vibrators;
the substrate includes a first region and a second region arranged along a first direction; the first partial vibrator is arranged in a first area of the substrate, and a plurality of first disconnection points are arranged on the first partial vibrator; the first disconnection point is arranged on the outer side edge of the first part of vibrators; the first part of vibrators are also provided with a plurality of first filtering branches;
The second partial vibrator is arranged in a second area of the substrate, and a plurality of second breaking points are arranged on the second partial vibrator; the second breaking point is arranged on the outer side edge of the second part of vibrators; the second part vibrator is further provided with a plurality of second filtering branches, and the types and the number of the branches of the second filtering branches contained in the second part vibrator are more than those of the branches of the first filtering branches contained in the first part vibrator; the number of the second breaking points is the same as the number of the first breaking points; the first part of vibrators are used for transmitting waves to the medium frequency, and the second part of vibrators are used for transmitting waves to the high frequency.
2. The wave-transparent low frequency antenna according to claim 1, wherein the first partial vibrator includes a first radiator and a second radiator, the first radiator and the second radiator being provided on an upper surface of the substrate;
The first breaking point is arranged on a first side edge and/or a second side edge of the first radiator, and the first side edge is adjacent to the second side edge; the second radiator has the same structure as the first radiator; and is vertically symmetrical with the first radiator.
3. The wave-transparent low frequency antenna according to claim 1, wherein the second partial vibrator includes a third radiator and a fourth radiator, the third radiator and the fourth radiator being provided on an upper surface of the substrate;
the second breaking point is arranged on a fifth side edge and a sixth side edge of the third radiator, and the fifth side edge and the sixth side edge are adjacent; the structure of the fourth radiator is the same as that of the third radiator; and is vertically symmetrical with the third radiator.
4. The wave-transparent low frequency antenna according to claim 1, wherein the first disconnection point has a first preset interval; the second breaking point is provided with a second preset interval; the second preset interval is smaller than the first preset interval.
5. The wave-transparent low frequency antenna according to claim 4, wherein a position of the first filtering branch corresponding to each of the first breaking points is disposed on a lower surface of the substrate.
6. The wave-transparent low frequency antenna according to claim 5, wherein the first filtering branch is arranged in a shape of a Chinese character 'ji', and a width of the first filtering branch is consistent with the first preset interval.
7. The wave-transparent low frequency antenna according to claim 4, wherein the second filtering branch comprises a filtering branch type comprising a "n" shape, a "τ" shape, and a "field" shape; the positions of the second filtering branches in the shape of a Chinese character 'ji' corresponding to each second breaking point are arranged on the lower surface of the substrate, and the widths of the second filtering branches are consistent with the second preset intervals;
the tau-shaped second filtering branch and the field-shaped second filtering branch are arranged on the upper surface of the substrate.
8. The wave-transparent low frequency antenna according to claim 1, wherein a first filter unit and a second filter unit are provided on a lower surface of the substrate;
the first filtering unit is arranged corresponding to the inner side edge of the first part of vibrators; the first filtering unit comprises a plurality of first parasitic strips, and a third preset interval is arranged between the adjacent first parasitic strips;
the second filtering unit is arranged corresponding to the inner side edge of the second part of vibrators; the second filter unit includes a plurality of second parasitic strips with a fourth predetermined spacing between adjacent ones of the second parasitic strips.
9. An antenna assembly comprising a first radiating element, a second radiating element and a wave-transparent low frequency antenna according to any one of claims 1 to 8; the working frequency band of the wave-transparent low-frequency antenna is smaller than that of the first radiation unit, and the working frequency band of the first radiation unit is smaller than that of the second radiation unit.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113471666A (en) * | 2021-05-14 | 2021-10-01 | 上海交通大学 | Multi-frequency transmission base station antenna and communication system |
| CN114122700A (en) * | 2021-11-18 | 2022-03-01 | 中信科移动通信技术股份有限公司 | Vibrator and base station antenna |
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| KR20210079174A (en) * | 2019-12-19 | 2021-06-29 | 동우 화인켐 주식회사 | Antenna device and display device including the same |
| CN114361779B (en) * | 2021-12-30 | 2022-11-29 | 华南理工大学 | Antenna device and low-frequency wave-transparent oscillator |
| CN115377657A (en) * | 2022-09-30 | 2022-11-22 | 中信科移动通信技术股份有限公司 | Low-frequency filtering radiation unit and base station antenna |
| CN116435767A (en) * | 2023-04-26 | 2023-07-14 | 深圳麦赫科技有限公司 | Low-frequency wave-transmitting radiation unit and multi-frequency common-caliber antenna using same |
| CN116598771A (en) * | 2023-05-10 | 2023-08-15 | 南通大学 | Double-layer broadband wave-transparent low-frequency antenna applied to 5G base station |
| CN117394001A (en) * | 2023-10-25 | 2024-01-12 | 京信通信技术(广州)有限公司 | Antenna unit and multi-system shared antenna |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113471666A (en) * | 2021-05-14 | 2021-10-01 | 上海交通大学 | Multi-frequency transmission base station antenna and communication system |
| CN114122700A (en) * | 2021-11-18 | 2022-03-01 | 中信科移动通信技术股份有限公司 | Vibrator and base station antenna |
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