CN110444877B - 5G communication terminal antenna - Google Patents
5G communication terminal antenna Download PDFInfo
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- CN110444877B CN110444877B CN201910724759.7A CN201910724759A CN110444877B CN 110444877 B CN110444877 B CN 110444877B CN 201910724759 A CN201910724759 A CN 201910724759A CN 110444877 B CN110444877 B CN 110444877B
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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
- 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
-
- 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
Abstract
A5G communication terminal antenna comprises an antenna main body, wherein the antenna main body adopts a coaxial line feeding double-sided PCB structure, and the front surface of the antenna main body is provided with an embedded feeding port, a grounding arm welding point, a multi-branch grounding arm, a copper-clad through hole I, a radiation part II, a low-frequency radiation arm and a lower frequency line II; the antenna is characterized in that a first radiation part, an impedance matching part, a high-frequency radiation arm, a first frequency reduction line and a second copper-clad via hole are arranged on the back surface of the antenna main body, the whole antenna is manufactured by adopting a double-sided copper-clad PCB and a copper-clad via hole process, and the antenna is different from a conventional single-sided copper-clad PCB antenna.
Description
Technical Field
The invention relates to the technical field of wireless communication antennas, in particular to a 5G communication terminal antenna with a novel feed structure.
Background
Fifth generation mobile phone mobile communication standard, also known as fifth generation mobile communication technology, foreign language abbreviation: and 5G. Is an extension after 4G. The theoretical downlink speed of a 5G network is 10Gb/s (equivalent to a download speed of 1.25 GB/s).
In 12.10.8.10.am in 2018, the ministry of industry and communications formally sends out a text which indicates that the frequency use permission of the low-frequency test in the 5G system is issued to China telecom, China Mobile and China Unicom. Wherein, Chinese telecom obtains 5G test frequency resources with the bandwidth of 3400 MHz-3500 MHz and 100MHz together; china Unicom obtains 5G test frequency resources with a bandwidth of 100MHz in total of 3500 MHz-3600 MHz; china mobile obtains 5G test frequency resources of 2515 MHz-2675 MHz and 4800 MHz-4900 MHz frequency bands, wherein 2515-2575 MHz, 2635-2675 MHz and 4800-4900 MHz frequency bands are newly added frequency bands, and 2575-2635 MHz frequency bands are the existing TD-LTE (4G) frequency bands of China mobile.
The antenna is an indispensable key component of wireless communication equipment, and as a transducer, the antenna can radiate guided waves in a waveguide into space and also can convert electromagnetic waves in the space into guided waves in the waveguide. The quality of the antenna performance directly affects the communication quality. Along with the development of science and technology, the integration level is improved, and the volume of the wireless terminal is continuously reduced. With the determination of the 5G communication frequency band, the frequency band of the antenna is increased by 3300-3800 MHz on the basis of an LTE frequency band (698-960 MHz, 1710-2690 MHz), and meanwhile, the antenna is required to be miniaturized as far as possible on the premise of ensuring the performance of the antenna, so that the research and development difficulty of the antenna in the aspects of multi-frequency wide bandwidth and miniaturization is increased.
Disclosure of Invention
The invention mainly aims to solve the problems of miniaturization and multi-band coverage in the design of a 5G communication antenna, provides a 5G communication terminal antenna with a novel structure and excellent miniaturized radiation performance from the practical application of products aiming at the defects of the prior art, and is suitable for various single-port and multi-port terminal devices.
In order to achieve the purpose, the invention discloses a 5G communication terminal antenna which comprises an antenna main body, wherein the antenna main body adopts a coaxial line feeding double-sided PCB structure, and the front surface of the antenna main body is provided with an embedded feeding port, a grounding arm welding point, a multi-branch grounding arm, a copper-clad through hole I, a radiation part II, a low-frequency radiation arm and a frequency reduction line II; the back of the antenna main body is provided with a radiation part, an impedance matching part, a high-frequency radiation arm, a first frequency reduction line and a second copper-clad through hole.
The antenna comprises an antenna body, a feed port, a grounding arm welding point, a coaxial line shielding layer, a copper-clad through hole, a high-frequency radiation arm, a frequency reduction line and a starting end of the frequency reduction line, wherein the coaxial line core line is welded on the feed port, the coaxial line shielding layer is welded on the grounding arm welding point, the embedded feed port is embedded in the bottom of the multi-branch grounding arm and close to the grounding arm welding point, an interval is arranged between the embedded feed port and the multi-branch grounding arm and between the embedded feed port and the grounding arm welding point to form an embedded form, the embedded feed port is connected to the bottom of the back radiation part of the antenna body through the copper-clad through hole, namely an impedance matching part, the top of the impedance matching.
A further scheme is that the multi-branch grounding arm extends to the bottom to form four branches after passing through a section of microstrip line, and the high-frequency radiation arm is provided with a long radiation arm for controlling a high-frequency main frequency part and a short radiation arm for adjusting high-frequency bandwidth; two sections of down-conversion lines II are connected in front of the low-frequency radiation arm, and the length and the width of the low-frequency radiation arm respectively control a low-frequency point and a bandwidth.
The further scheme is that the width of a gap of the multi-branch grounding arm is 0.2-1.6 mm, the width of a microstrip line of the impedance matching part is 0.9-4.0 mm, and the thickness of the PCB is 0.8 mm.
The further scheme is that the application frequency band of the 5G terminal antenna is an LTE +5G communication frequency band, namely 698-960 MHz, 1710-2690 MHz and 3300-3800 MHz, and standing wave in the frequency band is less than or equal to 3.0.
The invention has the characteristics that:
the antenna is designed into an asymmetric double-sided dipole structure, the dipole structure enables the antenna to have good omnidirectional radiation performance, the asymmetric structure enables the dipole antenna to have more frequency points and wider bandwidth, only small influence is generated on the performance, the double-sided structure can effectively reduce the influence caused by other structures, environments and other factors under the actual application condition, and the performance of the antenna is effectively ensured.
The antenna of the invention forms a multi-branch grounding arm by slotting the grounding arm, the grounding arm is connected with the coaxial feeder shielding layer, and can be coupled with the impedance matching part on the back of the antenna while radiating, thereby realizing distributed capacitance loading, effectively improving the bandwidth of the antenna and adjusting the impedance of the antenna.
The feed of the invention adopts a novel embedded structure, which is different from a direct out-of-plane structure of a conventional antenna, the feed is embedded at the bottom of the multi-branch grounding arm, namely near the welding point of the grounding arm, but is not connected with the multi-branch grounding arm and the welding point of the grounding arm, a feed port is connected to the bottom of a radiation 1 part at the back of the antenna, namely an impedance matching part, through a copper-clad through hole, so that more non-coplanar couplable parts can be generated, the feed welding is more stable, and the design space of the antenna is larger.
Novel embedded feed structure, similar coaxial probe feed structure, feed port size and the quantity and the position of covering the copper via hole all can influence the input impedance of antenna, can constantly change size and quantity in actual test, obtain optimized numerical value, make the antenna have good input impedance.
The antenna is a dipole-like antenna structure, the length of each radiation arm is lambda/4, and the antenna length can be calculated by using an antenna length calculation formula as follows:
wherein L is the length of the radiating arm, f0For the desired frequency, ε is the dielectric constant of the antenna medium, and C is the speed of light in vacuum 3X 108 m/s.
The 1.1 formula is used for calculating and designing the antenna, and the required frequency and bandwidth can be achieved by finely adjusting each part after actual initial sampling.
An exemplary dimension of the elliptical shape of the long and short axes of the feed port is 2.2mm x 1.0 mm.
An overall exemplary size of the grounding arm is 77.0mm x 8.5 mm.
The overall exemplary dimensions of the antenna are 152.5mm x 8.9mm x 0.8 mm.
The antenna body is provided with a direction mark on the front surface, the direction mark is positioned on the middle lower part of the front surface of the antenna and is L-shaped, and the alignment operation when the direction of the antenna and the shell are assembled is conveniently observed. The L-shaped mark is only used as an example in the current embodiment, and the mark may be changed according to the installation direction of different housings.
The invention has the beneficial effects that: the invention provides a 5G communication terminal antenna, which is manufactured by adopting a double-sided copper-clad PCB (printed Circuit Board) and copper-clad via hole process as a whole, is different from a conventional single-sided copper-clad PCB antenna and a combination of a double-sided copper-clad plate and a copper-clad via hole, and adopts a novel embedded feed structure, so that the antenna has more couplable parts while the volume of the antenna is effectively reduced, and can be symmetrically coupled as required. The invention can realize LTE +5G communication frequency bands, namely 698-960 MHz, 1710-2690 MHz and 3300-3800 MHz, and standing wave in the frequency band is less than or equal to 3.0, and the size of each part of the antenna can be changed according to needs to cover other frequency bands, and meanwhile, the influence of environmental factors on the antenna is small.
Drawings
Fig. 1 is a schematic front view of an embodiment of the present invention.
Fig. 2 is a schematic diagram of a back structure of an embodiment of the invention.
Fig. 3 is a standing wave diagram of an antenna according to an embodiment of the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
As shown in fig. 1 to 2, a 5G communication terminal antenna includes an antenna main body, the antenna main body adopts a coaxial-fed double-sided PCB structure, and the front surface of the antenna main body is provided with an embedded feed port 1, a ground arm welding point 2, a multi-branch ground arm 3, a copper-clad via hole one 4, a radiation second part 5, a low-frequency radiation arm (9), and a down-frequency line two (10); the back of the antenna main body is provided with a first radiation part (6), an impedance matching part (7), a high-frequency radiation arm (8), a first lower frequency line (11) and a second copper-clad through hole (12).
As shown in fig. 1 and 2, a coaxial cable core wire is welded on the embedded feed port 1, a coaxial cable shielding layer is welded on the ground arm welding point 2, the embedded feed port 1 is embedded at the bottom of the multi-branch ground arm 3 and close to the ground arm welding point 2, a gap is arranged between the embedded feed port 1 and the multi-branch ground arm 3 as well as between the embedded feed port 1 and the ground arm welding point 2, the embedded feed port 1 is connected to the bottom of the back radiation part 6 of the antenna main body, namely, the impedance matching part 7, the top of the impedance matching part 7 is connected with the high-frequency radiation arm 8 and the down-frequency line two 10, the down-frequency line two 10 is connected with the start end of the down-frequency line one 11 through the copper-clad through hole two 12 when the down-frequency line is wound to the central part, and the down-.
The multi-branch grounding arm 3 extends to the bottom through a section of microstrip line to form four branches, the multi-branch grounding arm 3 can generate a coupling effect with an impedance matching part 7 on the back of the antenna while radiating, the coupling generates a low frequency band and a middle frequency band of the antenna, and the impedance matching of the antenna is influenced; the impedance matching part 7 starts from the position close to the position of the second copper-clad via hole 12 on the back surface to the intersection point of the high-frequency radiation arm 8 and the first frequency reduction line 11 on the back surface of the antenna main body, and the multi-branch grounding arm 3 matched with the front surface of the antenna main body can effectively improve the impedance of an antenna frequency band by changing different widths of the impedance matching line at different positions; the shape of the microstrip line of the impedance matching part 7 near the position of the back copper-clad through hole 4 obviously influences the impedance matching of the antenna and needs to be adjusted to a matching shape and size; the high-frequency radiation arm 8 is provided with a long radiation arm and a short radiation arm, the long radiation arm controls a high-frequency main frequency part, and the short radiation arm can adjust the high-frequency bandwidth; because the low-frequency wavelength is longer and needs a longer microstrip line, two sections of lower frequency lines 10 are connected in front of the low-frequency radiation arm 9, and the length and the width of the low-frequency radiation arm 9 respectively control the low-frequency point and the bandwidth.
The width of the gap of the multi-branch grounding arm 3 is 0.2-1.6 mm, the width of the microstrip line of the impedance matching part 7 is 0.9-4.0 mm, and the thickness of the PCB is 0.8 mm.
The application frequency range of the antenna in the embodiment is LTE +5G communication frequency range, namely 698-960 MHz, 1710-2690 MHz and 3300-3800 MHz, the standing wave in the frequency range meets the requirement of less than or equal to 3.0,
it should be noted that, this embodiment is only an implementation case of the present invention, that is, a case of an LTE +5G communication frequency band, where LTE frequency bands of a medium frequency band and a low frequency band in three frequency bands of an antenna are already determined, a 5G frequency band of a high frequency band may change an antenna structure according to actual needs, and a frequency may change into another 5G communication frequency band required by LTE plus, that is, a high frequency radiation arm (8) is changed, frequency multiplication or impedance of an adjacent frequency band of 3300 to 3800MHz is optimized, so that the antenna has another 5G communication frequency band, and this embodiment does not limit an application frequency band of the antenna.
The foregoing is merely one embodiment of the invention, and is not intended to be exhaustive or to limit the invention to the precise form disclosed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Based on the embodiments of the present invention, it should be noted that all other embodiments obtained by workers skilled in the art without any inventive work are within the scope of the present invention.
Claims (2)
1. The utility model provides a 5G communication terminal antenna, includes antenna subject, antenna subject adopts the double-sided PCB structure of coaxial line feed, its characterized in that: the front surface of the antenna main body is provided with an embedded feed port (1), a grounding arm welding point (2), a multi-branch grounding arm (3), a copper-clad via hole I (4), a radiation II part (5), a low-frequency radiation arm (9) and a lower frequency line II (10); the back of the antenna main body is provided with a radiation part I (6), an impedance matching part (7), a high-frequency radiation arm (8), a lower frequency line I (11) and a copper-clad through hole II (12);
a coaxial line core wire is welded on the embedded feed port (1), a coaxial line shielding layer is welded on the welding point (2) of the grounding arm, the embedded feed port (1) is embedded at the bottom of the multi-branch grounding arm (3) and close to the grounding arm welding point (2), and a space is arranged between the embedded feed port (1) and the welding points (2) of the multi-branch grounding arm (3) and the grounding arm, the embedded feed port (1) is connected to the bottom of a radiation part (6) at the back of the antenna body, namely an impedance matching part (7) through a first copper-clad through hole (4), the top of the impedance matching part (7) is connected with a high-frequency radiation arm (8) and a lower frequency line II (10), the second down-conversion line (10) is connected with the starting end of the first down-conversion line (11) through a second copper-clad through hole (12) when the second down-conversion line is wound to the central part, and the first down-conversion line (11) is connected to the low-frequency radiation arm (9) through the inner winding;
the multi-branch grounding arm (3) extends to the bottom to form four branches after passing through a section of microstrip line, and the high-frequency radiation arm (8) is provided with a long radiation arm for controlling a high-frequency main frequency part and a short radiation arm for adjusting high-frequency bandwidth; two sections of down-conversion lines II (10) are connected in front of the low-frequency radiation arm (9), and the length and the width of the low-frequency radiation arm (9) respectively control a low-frequency point and a bandwidth;
the width of the gap of the multi-branch grounding arm (3) is 0.2-1.6 mm, the width of the microstrip line of the impedance matching part (7) is 0.9-4.0 mm, and the thickness of the PCB is 0.8 mm.
2. The 5G communication terminal antenna according to claim 1, wherein: the application frequency band of the 5G terminal antenna is an LTE +5G communication frequency band, namely 698-960 MHz, 1710-2690 MHz and 3300-3800 MHz, and standing wave in the frequency band is less than or equal to 3.0.
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| CN201910724759.7A CN110444877B (en) | 2019-08-07 | 2019-08-07 | 5G communication terminal antenna |
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| CN201910724759.7A CN110444877B (en) | 2019-08-07 | 2019-08-07 | 5G communication terminal antenna |
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| CN110444877B true CN110444877B (en) | 2021-02-26 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113571879B (en) * | 2020-04-28 | 2023-10-20 | 江苏嘉华通讯科技有限公司 | LTE antenna for CPE |
| CN112510353B (en) * | 2020-12-04 | 2021-10-29 | 深圳市海之景科技有限公司 | 5G antenna for communication terminal |
| CN112736428B (en) * | 2020-12-24 | 2023-04-25 | 京信通信技术(广州)有限公司 | Radiating element and antenna |
| CN113054411A (en) * | 2021-03-15 | 2021-06-29 | 宁波艾思科汽车音响通讯有限公司 | Vehicle-mounted Bluetooth antenna structure |
| CN113675595A (en) * | 2021-07-14 | 2021-11-19 | 深圳市联洲国际技术有限公司 | Ultra-wideband mobile communication antenna |
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