CN110911805B - Miniaturized dual-frequency dual-polarization 5G base station antenna with high isolation and high harmonic suppression - Google Patents
Miniaturized dual-frequency dual-polarization 5G base station antenna with high isolation and high harmonic suppression Download PDFInfo
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- CN110911805B CN110911805B CN201910996577.5A CN201910996577A CN110911805B CN 110911805 B CN110911805 B CN 110911805B CN 201910996577 A CN201910996577 A CN 201910996577A CN 110911805 B CN110911805 B CN 110911805B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
- H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
- H01Q1/246—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for base stations
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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
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/10—Resonant antennas
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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
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/30—Arrangements for providing operation on different wavebands
- H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
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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
- H01Q5/50—Feeding or matching arrangements for broad-band or multi-band operation
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Abstract
The invention discloses a high-isolation high-harmonic-suppression miniaturized double-frequency dual-polarization 5G base station antenna which is formed by corroding an upper printed circuit board and a lower printed circuit board, wherein a low-frequency square annular resonance patch is printed on the upper surface of the upper printed circuit board, a high-frequency square annular resonance patch is printed on the lower surface of the upper printed circuit board, two floor slotted coupling grooves are printed on the upper surface of the lower printed circuit board, two matched harmonic suppression branches are printed on the lower surface of the lower printed circuit board, the two matched harmonic suppression branches of the lower printed circuit board respectively excite one square annular resonance patch of the upper printed circuit board through one coupling groove, and a microstrip feeder line couples excited energy to the low-frequency square annular resonance patch and the high-frequency square annular resonance patch of the. According to the antenna disclosed by the invention, the resonant patch is set to be in the shape of a square ring, so that the radiation size of the antenna can be effectively reduced, the purpose of miniaturization is achieved, and the radiation efficiency and the port isolation degree of the antenna are improved.
Description
Technical Field
The invention belongs to the field of dual-polarized wireless communication antennas, and particularly relates to a high-isolation high-harmonic-suppression miniaturized dual-frequency dual-polarized 5G base station antenna in the field.
Background
With the development of mobile communication technology, fifth generation (5G) mobile communication technology is a hot spot of current mobile communication technology research. As an antenna for a communication front-end, many new challenges are also faced. First, with the development of mobile communication technology, antennas of different standards will inevitably coexist in the same location. Secondly, with the development of MIMO technology, the mutual coupling between the array antennas is required to be smaller and smaller. Finally, to reduce cost, space, and mutual coupling, the antenna must be designed in a compact manner. With the introduction of new 5G communication technologies, more communication frequency bands will serve 5G mobile communication, such as two sub-6 GHz bands of 3.3-3.6 GHz and 4.8-5 GHz. Therefore, the new 5G communication antenna not only meets the traditional requirements of wide frequency band and high isolation, but also faces a series of new challenges of miniaturization, dual frequency band and the like.
In addition, harmonic suppression in 5G mobile communication is also a concern in communication systems. As the integration degree of the mobile communication system increases, more and more functions are integrated into the same system, and the interference problem between different systems becomes more and more serious. In a transmission system, harmonics can cause a reduction in the efficiency of the power amplifier and interfere with the operation of other communication systems. In a receiving system, however, the harmonics are received by the antenna, which reduces the sensitivity of the receiver. Therefore, if the antenna at the front end of the communication system has a harmonic suppression function, the communication quality can be further improved.
Disclosure of Invention
The invention aims to solve the technical problem of providing a miniaturized double-frequency dual-polarized 5G base station antenna with high isolation and high harmonic suppression.
The invention adopts the following technical scheme:
the utility model provides a miniaturized dual-frenquency double polarization 5G base station antenna of high isolation high harmonic suppression which improves and lies in: the antenna is corroded by two upper and lower printed circuit boards and is formed, the upper surface of the upper circuit board is printed with a low-frequency square annular resonance patch, the lower surface of the upper circuit board is printed with a high-frequency square annular resonance patch, the upper surface of the lower circuit board is printed with two coupling grooves with two floor slots, the lower surface of the lower circuit board is printed with two matching harmonic suppression branches, the two matching harmonic suppression branches of the lower circuit board are respectively used for exciting one square annular resonance patch of the upper circuit board through one coupling groove, and the microstrip feeder line couples excited energy to the low-frequency square annular resonance patch and the high-frequency square annular resonance patch of the upper circuit board through.
Further, the distance between the upper and lower printed circuit boards is 8 mm.
Furthermore, the low-frequency square ring resonant patch works in a frequency band of 3.3-3.6 GHz, the length of the low-frequency square ring resonant patch is half of the guided wavelength corresponding to the center frequency, and the size of the low-frequency square ring resonant patch is 24mm multiplied by 24 mm.
Furthermore, the high-frequency square ring resonant patch works in a frequency band of 4.8-5 GHz, the length of the patch is half of the guided wavelength corresponding to the center frequency, and the size of the patch is 12.5mm multiplied by 12.5 mm.
Furthermore, one of the slotted coupling grooves of the two floors is a straight-line-shaped coupling groove, the other one of the slotted coupling grooves is an H-shaped coupling groove, and the resonance lengths of the two coupling grooves are half of the guided wavelength of the center frequency of the low frequency band.
Furthermore, one of the two matched harmonic suppression branches is a vertical polarization matched harmonic suppression branch, the other is a horizontal polarization matched harmonic suppression branch, the vertical polarization matched harmonic suppression branch excites the low-frequency square annular resonance patch through the I-shaped coupling groove, and the horizontal polarization matched harmonic suppression branch excites the high-frequency square annular resonance patch through the H-shaped coupling groove.
Furthermore, the return loss of the antenna is larger than 15dB in a low-frequency range of 3.3-3.6 GHz, the return loss of the antenna is larger than 15dB in a high-frequency range of 4.8-5 GHz, the isolation of the two ports is larger than 35dB, and the reflection coefficient corresponding to the harmonic wave of the antenna is larger than-0.8 dB in a range of 6-12 GHz.
Further, the antenna may be extended to an antenna array, and the form of the antenna array includes, but is not limited to, a linear array and an area array.
The invention has the beneficial effects that:
according to the antenna disclosed by the invention, the resonant patch is set to be in the shape of a square ring, so that the radiation size of the antenna can be effectively reduced, the purpose of miniaturization is achieved, and the radiation efficiency and the port isolation degree of the antenna are improved. The coupling slot of the floor slot is arranged into the I-shaped coupling slot and the H-shaped coupling slot, so that the coupling efficiency of the microstrip feeder line can be effectively improved, and the input impedance of the antenna can be improved. The matching harmonic suppression branch is set to be single-branch-shaped or double-branch-shaped, so that the input impedance of the antenna can be effectively improved, the bandwidth of the antenna can be widened, and the harmonic suppression capability of the antenna can be improved.
The antenna disclosed by the invention realizes the working states of two polarizations of the antenna by orthogonal excitation of the low-frequency and high-frequency square annular resonant patches and has high port isolation. Two matching harmonic suppression branches located on the lower surface of the lower circuit board can play a role in matching two 5G communication frequency bands and can also play a role in suppressing high-frequency harmonics of the antenna.
The antenna disclosed by the invention has the advantages of miniaturization, wide frequency band, double frequency bands, high port isolation, high harmonic suppression and the like, and can be widely applied to the field of 5G mobile communication.
Drawings
Fig. 1 is a schematic top-layer structure diagram of an antenna disclosed in embodiment 1 of the present invention;
fig. 2 is a schematic side view of an antenna disclosed in embodiment 1 of the present invention;
fig. 3 is a schematic structural view of the upper surface of the circuit board of the antenna disclosed in embodiment 1 of the present invention;
fig. 4 is a schematic structural view of a lower surface of a circuit board of the antenna disclosed in embodiment 1 of the present invention;
fig. 5 is a schematic structural view of the upper surface of the lower circuit board of the antenna disclosed in embodiment 1 of the present invention;
fig. 6 is a schematic structural view of a lower surface of a circuit board under an antenna disclosed in embodiment 1 of the present invention;
fig. 7 is a S-parameter graph of the antenna disclosed in embodiment 1 of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Embodiment 1, as shown in fig. 1-2, this embodiment discloses a miniaturized dual-band dual-polarized 5G base station antenna with high isolation and high harmonic suppression, the whole antenna has a compact structural design, and is formed by etching an upper printed circuit board and a lower printed circuit board, a low-frequency square ring resonator patch 1a is printed on the upper surface of the upper circuit board 4a, a high-frequency square ring resonator patch 1b is printed on the lower surface, two slotted coupling grooves are printed on the upper surface of the lower circuit board 4b, and two matched harmonic suppression branches are printed on the lower surface, the two matched harmonic suppression branches of the lower circuit board excite one square ring resonator patch of the upper circuit board through one coupling groove, and a microstrip feeder couples excited energy to the low-frequency square ring resonator patch and the high-frequency square ring resonator patch of the upper circuit board through the coupling groove of the lower circuit board.
In this embodiment, the distance between the upper and lower printed circuit boards is 8 mm.
As shown in fig. 3-4, the low-frequency square ring resonator patch 1a is adjusted to operate in the frequency band of 3.3-3.6 GHz, and in order to reduce the radiation aperture of the antenna, the low-frequency resonator patch is designed to be a square ring, the length of the square ring resonator patch is about half of the guide wavelength corresponding to the center frequency, and the size of the square ring resonator patch is 24mm × 24mm (miniaturization), and two orthogonal polarization radiations of the antenna in the low frequency band are obtained by orthogonal excitation of the low-frequency square ring resonator patch. The size of the high-frequency square ring resonant patch 1b is adjusted to enable the high-frequency square ring resonant patch to work in a 4.8-5 GHz frequency band, in order to reduce the radiation aperture of the antenna, the high-frequency square ring resonant patch is designed into a square ring shape, the length of the square ring resonant patch is about half of the guide wavelength corresponding to the central frequency, the size of the square ring resonant patch is 12.5mm multiplied by 12.5mm (belonging to miniaturization), and two orthogonal polarization radiations of the antenna in the high frequency band are obtained through orthogonal excitation of the high-frequency square ring resonant patch. Based on the design, the 5G dual-band 3.3-3.6 GHz and 4.8-5 GHz work is realized.
As shown in fig. 5, one of the two floor slotted coupling slots is a "straight" coupling slot 2a, and the other is an "H" coupling slot 2b, and the resonant lengths of the two coupling slots are both about half of the guide wavelength of the center frequency of the low frequency band. By controlling the sizes of the linear coupling groove and the H-shaped coupling groove, the coupling amount of the electric field and the magnetic field (namely the energy of the micro-strip feeder line coupled to the low-frequency square annular resonant patch and the high-frequency square annular resonant patch) can be conveniently controlled, and further the input impedance of the antenna is adjusted.
As shown in fig. 6, one of the two matched harmonic suppression stubs is a vertical polarization matched harmonic suppression stub 3a, and the other is a horizontal polarization matched harmonic suppression stub 3b, the vertical polarization matched harmonic suppression stub excites the low-frequency square ring resonator patch through the in-line coupling slot, and the horizontal polarization matched harmonic suppression stub excites the high-frequency square ring resonator patch through the H-shaped coupling slot.
The orthogonal arrangement of the vertical polarization matching harmonic suppression branch and the horizontal polarization matching harmonic suppression branch enables the antenna to obtain high port isolation. By controlling the lengths of the vertical polarization matching harmonic suppression branch and the horizontal polarization matching harmonic suppression branch, the input impedance of the antenna in two frequency bands and the suppression condition of the antenna on the harmonic can be adjusted, and the matching of the antenna is improved.
As shown in FIG. 7, the return loss of the antenna is larger than 15dB in the low frequency range of 3.3-3.6 GHz, the return loss is larger than 15dB in the high frequency range of 4.8-5 GHz, the isolation of the two ports is larger than 35dB, and the reflection coefficient corresponding to the harmonic wave is larger than-0.8 dB in the range of 6-12 GHz.
The antenna may be extended to antenna arrays in forms including, but not limited to, linear and planar arrays. The method can be applied to other communication fields such as 5G mobile communication, satellite communication, radar communication and the like.
Claims (6)
1. The utility model provides a miniaturized dual-frenquency double polarization 5G base station antenna of high harmonic suppression of high isolation which characterized in that: the antenna is formed by corroding an upper printed circuit board and a lower printed circuit board, a low-frequency square annular resonant patch is printed on the upper surface of the upper printed circuit board, a high-frequency square annular resonant patch is printed on the lower surface of the upper printed circuit board, two slotted coupling grooves of a floor are printed on the upper surface of the lower printed circuit board, two matched harmonic suppression branches are printed on the lower surface of the lower printed circuit board, and a microstrip feeder couples excited energy to the low-frequency square annular resonant patch and the high-frequency square annular resonant patch of the upper printed circuit board through the; in the slotted coupling grooves of the two floors, one is a linear coupling groove, the other is an H-shaped coupling groove, the resonance lengths of the two coupling grooves are half of the guided wavelength of the center frequency of a low-frequency band, in the two matched harmonic suppression branches, one is a vertical polarization matched harmonic suppression branch, the other is a horizontal polarization matched harmonic suppression branch, the vertical polarization matched harmonic suppression branch excites a low-frequency square annular resonance patch through the linear coupling groove, and the horizontal polarization matched harmonic suppression branch excites the high-frequency square annular resonance patch through the H-shaped coupling groove.
2. The miniaturized dual-band dual-polarized 5G base station antenna with high isolation and high harmonic suppression according to claim 1, wherein: the distance between the upper and lower printed circuit boards was 8 mm.
3. The miniaturized dual-band dual-polarized 5G base station antenna with high isolation and high harmonic suppression according to claim 1, wherein: the low-frequency square ring resonant patch works in a frequency band of 3.3-3.6 GHz, the length of the low-frequency square ring resonant patch is half of the guided wavelength of the corresponding center frequency, and the size of the low-frequency square ring resonant patch is 24mm multiplied by 24 mm.
4. The miniaturized dual-band dual-polarized 5G base station antenna with high isolation and high harmonic suppression according to claim 1, wherein: the high-frequency square ring resonant patch works in a frequency band of 4.8-5 GHz, the length of the patch is half of the guided wavelength corresponding to the central frequency, and the size of the patch is 12.5mm multiplied by 12.5 mm.
5. The miniaturized dual-band dual-polarized 5G base station antenna with high isolation and high harmonic suppression according to claim 1, wherein: the return loss of the antenna is larger than 15dB in a low-frequency range of 3.3-3.6 GHz, the return loss of the antenna is larger than 15dB in a high-frequency range of 4.8-5 GHz, the isolation of the two ports is larger than 35dB, and the reflection coefficient corresponding to the harmonic wave of the antenna is larger than-0.8 dB in a range of 6-12 GHz.
6. The miniaturized dual-band dual-polarized 5G base station antenna with high isolation and high harmonic suppression according to claim 1, wherein: the antenna can be extended to an antenna array, and the form of the antenna array comprises a linear array and an area array.
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| US11784418B2 (en) * | 2021-10-12 | 2023-10-10 | Qualcomm Incorporated | Multi-directional dual-polarized antenna system |
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| CN111969304B (en) * | 2020-08-18 | 2023-04-25 | 维沃移动通信有限公司 | Antenna structure and electronic equipment |
| CN116154478B (en) * | 2023-04-19 | 2023-06-20 | 湖南大学 | Miniaturized MIMO antenna |
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