CN114447595A - Double-port-ring antenna with zero clearance and high isolation characteristics and mobile terminal equipment - Google Patents
Double-port-ring antenna with zero clearance and high isolation characteristics and mobile terminal equipment Download PDFInfo
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- CN114447595A CN114447595A CN202210037043.1A CN202210037043A CN114447595A CN 114447595 A CN114447595 A CN 114447595A CN 202210037043 A CN202210037043 A CN 202210037043A CN 114447595 A CN114447595 A CN 114447595A
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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
- H01Q1/12—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
- H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
- H01Q1/243—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use with built-in antennas
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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
-
- 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
- H01Q1/523—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure reducing the coupling between adjacent antennas between antennas of an array
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q25/00—Antennas or antenna systems providing at least two radiating patterns
- H01Q25/04—Multimode antennas
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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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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
The invention belongs to the technical field of wireless communication antennas, and discloses a double-port loop antenna with zero clearance and high isolation characteristics and a mobile terminal device, wherein the double-port loop antenna comprises a radiator, a first port feed network, a second port feed network and a grounding microstrip line, wherein the radiator is printed on the inner surface of a vertical dielectric plate, and the first port feed network, the second port feed network and the grounding microstrip line are printed on the upper surface of a horizontal dielectric plate; the metal floor is etched on the back of the horizontal dielectric plate, and no clearance exists between the metal floor and the vertical dielectric plate. The radiator is composed of two staggered double rings and has a bilaterally symmetrical structure. Two staggered double-ring structures forming the radiator are respectively provided with a gap and present a bilateral symmetrical structure. The radiator of the antenna is of a double-loop antenna structure, and the higher isolation can be ensured without leading out an additional decoupling structure between two radio frequency ports, so that the miniaturization of mobile terminal equipment is facilitated.
Description
Technical Field
The invention belongs to the technical field of wireless communication antennas, and particularly relates to a double-port-ring antenna with zero clearance and high isolation characteristics and mobile terminal equipment.
Background
Currently, mobile communication technology has advanced significantly over the past four decades, going through the change from the first generation (1G) of analog cellular technology to the present stage fifth generation (5G) of mobile communication technology. The demand for larger channel transmission capacity and higher information transmission rate is more and more urgent. But the spectrum resources are limited, limiting further development of wireless communication technologies. The MIMO (Multiple-Input Multiple-Output) technology can exponentially increase the transmission rate of data and the communication capacity of a channel without occupying spectrum resources and increasing transmission power. Therefore, MIMO technology will be one of the core technologies of 5G.
MIMO technology constructs multiple independent data streams by designing multiple antennas at both the transmitting and receiving ends of a wireless communication system. The critical issue faced by multiple antennas is the coupling between antenna ports. The 0.5 wavelength spacing between the antennas is a critical point to ensure low correlation between the antenna elements. For base station antennas, the wide space may provide sufficient distance between the antennas to ensure a low degree of coupling between the antennas. However, for a mobile phone with a limited size, it is very challenging to place multiple antennas in such a small space. The demand of people for high screen ratio of mobile phones is more and more increasing at present, which requires that the antenna has small clearance, so that the space reserved for the antenna is smaller and smaller. The smaller headroom means the poorer radiation performance of the antenna, and how to maintain the good radiation performance of the mobile phone antenna with small headroom is a challenge for 5G mobile terminals.
Through the above analysis, the problems and defects of the prior art are as follows: the dual-port MIMO antenna of the existing mobile terminal equipment can not keep high isolation and good broadband radiation performance between ports under the conditions of zero clearance and no need of an additional decoupling structure.
The difficulty in solving the above problems and defects is: when the antenna clearance is small, the radiation performance of the antenna is poor, and the bandwidth is narrow. The existing multi-port antenna usually causes poor isolation between the antennas because of the close distance between the antenna ports, and the adoption of an additional decoupling structure is not favorable for the miniaturization of a terminal system. If the orthogonal arrangement mode is adopted, an additional decoupling structure is not needed, but the arrangement position of the antenna is always strictly required. It is very difficult to design a zero-headroom wideband dual-port antenna that maintains high isolation between ports without decoupling structures.
The significance of solving the problems and the defects is as follows: the proposed dual-port antenna can maintain high isolation between ports and good broadband radiation performance with zero headroom and without the need for additional decoupling structures. The method has great significance for realizing real full-screen and narrow frame.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a double-port loop antenna with zero clearance and high isolation characteristics and mobile terminal equipment.
The invention is realized in such a way that the double-port-ring antenna with the characteristics of zero headroom and high isolation is provided with the following components:
the antenna comprises a radiator, a first port feed network, a second port feed network and a grounding microstrip line;
the radiator is printed on the inner surface of the vertical dielectric slab, and the first port feed network, the second port feed network and the grounding microstrip line are printed on the upper surface of the horizontal dielectric slab;
the metal floor is etched on the back of the horizontal dielectric plate.
Further, the radiator is composed of two staggered double rings and has a left-right symmetrical structure.
Furthermore, two staggered double-ring structures forming the radiator are respectively provided with a gap, and are in a bilateral symmetry structure.
Furthermore, the grounding microstrip line is positioned at the central position of the double-ring staggered structure, one end of the grounding microstrip line is connected with the bottom of the radiator, and the other end of the grounding microstrip line is connected with the floor.
Further, the first port feed network and the second port feed network are respectively connected with two sides of the radiator, are symmetrically distributed and are arranged outside the slot introduced by the radiator.
Furthermore, the first port feed network consists of a feed microstrip line, a feed point and a coaxial line;
wherein the feed microstrip line is welded with the radiator;
the second port feed network of the dual-port antenna consists of a feed microstrip line, a feed point and a coaxial line; the feed microstrip line is welded with the radiator.
Furthermore, the double-port loop antenna with the characteristics of zero clearance and high isolation further comprises a grounding microstrip line;
the grounding microstrip line is grounded through the metalized through hole, and the pad is grounded through the metalized through hole.
Further, the two interleaved double loop structures forming the radiator form a distributed LC resonant circuit between the two ports to suppress mutual coupling between the two ports.
Furthermore, the radiator and the decoupling structure are combined into a whole.
Another object of the present invention is to provide a mobile terminal device equipped with the dual port-ring antenna having zero headroom and high isolation characteristics.
By combining all the technical schemes, the invention has the advantages and positive effects that: the antenna unit is a structure of a dual-port excitation dual-ring antenna, and by utilizing the inherent multimode resonance characteristic of the ring antenna, the broadband radiation performance can be ensured even if no clearance exists between a metal floor and a mobile phone frame. The antenna radiator is formed by two staggered double loops. The double-ring interleaved part and the grounding microstrip line can form a distributed LC resonance circuit between the two ports to inhibit mutual coupling between the two ports. By embedding the distributed LC resonant circuit in the radiator, the two ports can ensure high isolation without adding an additional decoupling structure.
The antenna provided by the invention only has one radiator, but the antenna has two radio frequency ports. The antenna can be independently used as an antenna, and can form an MIMO antenna system, and under the condition of using less antenna radiators, the MIMO antenna system with more ports can be realized, and a high-performance multi-antenna system can be realized in a limited space. The antenna provided by the invention can also ensure the broadband radiation performance under the condition of zero clearance. The radiator of the antenna provided by the invention is of a double-loop antenna structure, and higher isolation can be ensured without an additional decoupling structure between two leading-out radio frequency ports, so that the miniaturization of mobile terminal equipment is facilitated.
Drawings
Fig. 1 is a schematic structural diagram of a dual-port-ring antenna with zero headroom and high isolation provided by an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a metal floor and a metalized via provided in an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a ground microstrip line, a first port feed network, and a second port feed network according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a first port feeding point, an inner core and an outer skin according to an embodiment of the present invention;
FIG. 5 is a graph of S parameters for a simulation provided by an embodiment of the present invention;
FIG. 6 is a diagram illustrating the total efficiency of two port simulations provided by an embodiment of the present invention;
in the figure: 1. a radiator; 2. a vertical dielectric plate; 3. a horizontal dielectric plate; 4. a metal floor; 5. a ground microstrip line; 6. a first port feed network; 61. a first port feed microstrip line; 62. a first port feed point; 7. a second port feed network; 71. a second port feed microstrip line; 72. a second port feed point; 8. metallizing the via hole; 9. a pad; 10. a coaxial line; 101. an inner core; 102. and (4) coating.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In view of the problems in the prior art, the present invention provides a dual-port loop antenna with zero headroom and high isolation and a mobile terminal device, and the present invention is described in detail below with reference to the accompanying drawings.
Example 1:
as shown in fig. 1, the dual-port loop antenna with zero headroom and high isolation provided by the present invention is composed of a radiator 1, a first port feed network 6, a second port feed network 7 and a ground microstrip line 5.
The vertical dielectric plate 2 represents a mobile phone frame, and the horizontal dielectric plate 3 represents a mobile phone main board. A radiator 1 of the double-port loop antenna is printed on the inner surface of a mobile phone frame, a first port feed network 6, a second port feed network 7 and a grounding microstrip line 5 of the double-port loop antenna are printed on the upper surface of a horizontal dielectric plate, and a metal floor 4 is etched on the back surface of the horizontal dielectric plate 3.
Example 2:
as shown in fig. 2, the radiator 1 of the dual-port loop antenna with zero headroom and high isolation provided by the present invention is composed of two staggered loops.
Example 3:
as shown in fig. 3, the first port feed network 6 of the dual-port loop antenna with zero headroom and high isolation provided by the present invention is composed of a feed microstrip line 61, a feed point 62 and a coaxial line 10. Wherein the feed microstrip line 61 is welded with the radiator 1. The second port feed network 7 of the two-port antenna is composed of a feed microstrip line 71, a feed point 72 and a coaxial line 10. Wherein the feed microstrip line 71 is welded with the radiator 1. The ground microstrip line 5 of the dual-port antenna is grounded through a metalized via 8. The pad 9 is grounded through the metalized via 8. The first port feed network and the second port feed network are identical.
As shown in fig. 4, the inner core 101 of the coaxial wire 10 is welded to the feeding point 62, and the outer sheath 102 of the coaxial wire is welded to the bonding pad 9.
The technical effects of the present invention will be described in detail with reference to simulations.
As shown in FIG. 5, the-6 dB impedance bandwidth of the antenna is 3.3-3.92GHz, and the antenna has broadband radiation performance; the isolation between the two ports is larger than 15dB in the full frequency band, and the isolation performance is high.
As shown in fig. 6, the simulated total efficiency for both ports is greater than 65%.
The invention discloses a dual-port mobile phone antenna with zero clearance and high isolation characteristics, which consists of a double-ring radiator, a grounding microstrip line, a first port feed network and a second port feed network.
The antenna is a structure of a dual-port excitation dual-ring antenna, and by utilizing the inherent multimode resonance characteristic of the ring antenna, the broadband radiation performance can be ensured even if no clearance exists between the metal floor and the mobile phone frame.
The radiator of the antenna is composed of two staggered double loops. The double-ring interleaved part and the grounding microstrip line can form a distributed LC resonance circuit between the two ports to inhibit mutual coupling between the two ports.
According to the invention, the distributed LC resonance circuit is embedded into the radiator, so that the high isolation between the two ports can be ensured without adding an additional decoupling structure. The antenna unit is a structure of a dual-port excitation dual-ring antenna, no clearance exists between the metal floor and the mobile phone frame, and the two ports can also ensure broadband radiation performance under the condition of zero clearance. The high isolation characteristic between the ports can be ensured without any decoupling structure between the two ports.
In the description of the present invention, "a plurality" means two or more unless otherwise specified; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The above description is only for the purpose of illustrating the present invention and the appended claims are not to be construed as limiting the scope of the invention, which is intended to cover all modifications, equivalents and improvements that are within the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A dual-port-ring antenna with zero headroom and high isolation characteristics, the dual-port-ring antenna with zero headroom and high isolation characteristics being provided with:
the antenna comprises a radiator, a first port feed network, a second port feed network and a grounding microstrip line;
the radiator is printed on the inner surface of the vertical dielectric slab, and the first port feed network, the second port feed network and the grounding microstrip line are printed on the upper surface of the horizontal dielectric slab;
the metal floor is etched on the back of the horizontal dielectric plate, and no clearance exists between the metal floor and the vertical dielectric plate.
2. The dual port loop antenna with zero headroom and high isolation characteristics of claim 1, wherein the radiator is formed of two interleaved dual loops and exhibits a left-right symmetric structure.
3. The dual port loop antenna with zero headroom and high isolation characteristics of claim 2, wherein two interleaved dual loop structures forming the radiator each introduce a slot and exhibit a left-right symmetric structure.
4. The dual port ring antenna with zero headroom and high isolation of claim 1, wherein the ground microstrip line is located at a center position of the double loop staggered structure, one end of which is connected to the bottom of the radiator and the other end of which is connected to the ground.
5. The dual port loop antenna with zero headroom and high isolation characteristics of claim 1, wherein the first port feed network and the second port feed network are connected together on both sides of the radiator, respectively, and exhibit a symmetrical distribution and are outside the slot introduced by the radiator.
6. The dual-port loop antenna with zero headroom and high isolation characteristics of claim 5, wherein the first port feed network is composed of a feed microstrip line, a feed point and a coaxial line;
wherein the feed microstrip line is welded with the radiator;
the second port feed network of the dual-port antenna consists of a feed microstrip line, a feed point and a coaxial line; the feed microstrip line is welded with the radiator.
7. The zero headroom and high isolation characteristic dual port ring antenna of claim 1 further comprising a ground microstrip line;
the grounding microstrip line is grounded through the metalized through hole, and the pad is grounded through the metalized through hole.
8. The dual port loop antenna with zero headroom and high isolation characteristics of claim 1, wherein the two interleaved double loop structures forming the radiator form a distributed LC tank between the two ports that suppresses mutual coupling between the two ports.
9. The dual port ring antenna with zero headroom and high isolation characteristics of claim 8, wherein the radiator and the decoupling structure are integrated into one.
10. A mobile terminal device, characterized in that the mobile terminal device is equipped with the dual-port-ring antenna with zero headroom and high isolation characteristics of any one of claims 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210037043.1A CN114447595B (en) | 2022-01-13 | 2022-01-13 | Double-port-ring antenna with zero clearance and high isolation characteristics and mobile terminal equipment |
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| CN202210037043.1A CN114447595B (en) | 2022-01-13 | 2022-01-13 | Double-port-ring antenna with zero clearance and high isolation characteristics and mobile terminal equipment |
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Cited By (1)
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| CN114976598A (en) * | 2022-06-01 | 2022-08-30 | 西安电子科技大学 | High-isolation inverted-L-shaped antenna pair applied to zero-clearance mobile terminal |
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| CN114447595B (en) | 2023-03-21 |
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