CN111600129A - Novel multi-antenna system - Google Patents
Novel multi-antenna system Download PDFInfo
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- CN111600129A CN111600129A CN202010460219.5A CN202010460219A CN111600129A CN 111600129 A CN111600129 A CN 111600129A CN 202010460219 A CN202010460219 A CN 202010460219A CN 111600129 A CN111600129 A CN 111600129A
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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
- 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
- H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
- H01Q15/0006—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices
- H01Q15/0013—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices said selective devices working as frequency-selective reflecting surfaces, e.g. FSS, dichroic plates, surfaces being partly transmissive and reflective
- H01Q15/0026—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices said selective devices working as frequency-selective reflecting surfaces, e.g. FSS, dichroic plates, surfaces being partly transmissive and reflective said selective devices having a stacked geometry or having multiple layers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
- H01Q15/0006—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices
- H01Q15/0086—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices said selective devices having materials with a synthesized negative refractive index, e.g. metamaterials or left-handed materials
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Abstract
The invention discloses a novel multi-antenna system, which comprises from top to bottom: the antenna comprises a periodic resonance unit structure layer, a medium substrate layer, an antenna array and a decoupling chip; the periodic resonance unit structure layer is covered on the medium substrate layer to form a super-surface covering layer, and the super-surface covering layer covers the antenna array through a medium supporting column or an antenna housing structure; the antenna array is formed by a plurality of antenna unit arrays in a distributed mode, and the bottom ends of every two adjacent antenna units are connected through a decoupling chip. The novel multi-antenna system adopts a design method for reducing the coupling among the antenna units in the multi-antenna system, and comprehensively applies the super-surface coating and the decoupling chip into the multi-antenna system, wherein the super-surface coating is used for reducing the coupling of the space among the antennas, and the decoupling chip is used for reducing the coupling of the surface waves among the antennas.
Description
Technical Field
The invention relates to the field of wireless communication, in particular to a novel high-isolation and miniaturized multi-antenna system.
Background
With the rapid development of mobile communication systems, radio frequency spectrum resources are increasingly in short supply, and how to provide higher-quality and faster communication services becomes a research hotspot in fifth-generation mobile communication systems (5G). In this context, a long-standing multiple-input multiple-output (MIMO) communication technology has been proposed as a key technology in 5G systems.
A Multiple Input Multiple Output (MIMO) technique refers to using a plurality of transmitting antennas and receiving antennas at a transmitting end and a receiving end simultaneously, so that signals are transmitted and received through the plurality of antennas of the transmitting end and the receiving end. Therefore, the mimo technology can realize high-speed and large-capacity data transmission without additionally increasing communication frequency band and transmission power, and significantly improve system data throughput and channel capacity. In multiple-input multiple-output (MIMO) systems, antennas play a crucial role because their characteristics are inherently included in the communication channel between the transmitter and the receiver.
MIMO technology is based on antenna arrays, with increasing demand for channel capacity, massive MIMO technology will become the core of 5G systems, and compact dense arrays will facilitate this process. However, in either a 5G base station or a mobile terminal, due to space constraints, as the number of antennas increases, the spacing between the antenna elements is relatively small, resulting in strong mutual coupling between the elements. The greater the number of antenna elements in a particular space, the stronger the coupling between the elements, which results in:
(1) an increase in spatial correlation;
(2) a decrease in radiation efficiency;
(3) a decrease in cell gain;
(4) degradation of signal-to-noise ratio;
(5) a reduction in channel capacity.
In summary, in a limited space, how to effectively reduce the coupling between antenna units in the MIMO system, improve the isolation between the units, and ensure the radiation performance of the original antenna has become a hot point of research in the industry.
Disclosure of Invention
In view of the above problems, the present invention provides a method for improving the coupling performance between multiple antenna elements by using a frequency super surface coating and decoupling chip integration approach under the condition of limited physical space and strong mutual coupling between adjacent antenna elements.
The technical scheme of the invention is as follows:
a novel multiple antenna system comprising from top to bottom:
a periodic resonant unit structure layer;
a dielectric substrate layer;
an antenna array;
a decoupling chip;
the periodic resonance unit structure layer is covered on the medium substrate layer to form a super-surface covering layer, and the super-surface covering layer covers the antenna array through a medium supporting column or an antenna housing structure; the antenna array is formed by a plurality of antenna unit arrays in a distributed mode, and the bottom ends of every two adjacent antenna units are connected through a decoupling chip.
Preferably, the size of the resonance unit in the super-surface coating, the distance between the resonance units and the height of the coating and the array antenna are adjusted, so that the coupling among the units in the multi-antenna system containing the super-surface coating is reduced, and the isolation is improved.
Preferably, the size of the resonance unit in the super-surface coating, the distance between the resonance units and the height of the coating and the array antenna are adjusted, so that the gain of the multi-antenna system comprising the super-surface coating is improved, and the radiation efficiency is increased.
Preferably, the resonance units in the super-surface covering layer adopt different structural forms so as to adapt to the requirements of an actual antenna system;
preferably, the periodic resonant unit structure layer is designed to be multi-layer, so that the bandwidth of the antenna is further improved, the influence of the surface wave of the single-layer periodic resonant structure unit is partially eliminated, and the transmission or reflection coefficient is improved.
Preferably, in the multi-layer periodic resonant unit structure layer, the resonant units of each layer have the same or different structures.
Preferably, the multiple layers of periodic resonant unit structure layers are respectively covered on one dielectric substrate layer, the dielectric substrate layers of the multiple layers are made of the same or different dielectric materials, and the dielectric substrate layers of the multiple layers are designed to have the same or different thicknesses according to actual needs.
Preferably, the decoupling chip selects one of a tuned, single frequency or multi-frequency chip.
The invention has the advantages that:
the novel multi-antenna system adopts a design method for reducing the coupling among the antenna units in the multi-antenna system, and comprehensively applies the super-surface coating and the decoupling chip into the multi-antenna system, wherein the super-surface coating is used for reducing the coupling of the space among the antennas, and the decoupling chip is used for reducing the coupling of the surface waves among the antennas.
Drawings
The invention is further described with reference to the following figures and examples:
fig. 1 is a schematic diagram of a four-element MIMO antenna system according to an embodiment;
fig. 2 is a S11 parameter diagram of a linear MIMO antenna composed of four antenna units in the embodiment;
fig. 3 is a S12 parameter diagram of a linear MIMO antenna composed of four antenna units in the embodiment.
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 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. The details are as follows:
taking a four-antenna system as an example, as shown in fig. 1, the present embodiment is a four-element MIMO antenna system, which includes from top to bottom:
the two layers of the super-surface coating layers 1 respectively comprise a medium substrate layer and a periodic resonance unit structure layer;
an antenna array 2 including four antenna elements;
a decoupling chip 3;
the super-surface coating layer 1 covers the antenna array 2 through a dielectric support column or an antenna housing structure; the antenna array is formed by four antenna unit arrays in a distributed mode, and the bottom ends of two adjacent antenna units are connected through a decoupling chip 3.
In the embodiment, the working frequency band of each antenna is 700MHz-2.7GHz, and the four antenna units adopt the same structural form.
The super-surface coating adopts two layers of periodic resonance structures, the two layers of periodic resonance structures adopt the same resonant periodic units, and in the actual engineering, the isolation of a low-frequency band is a difficult point in design.
The linear array MIMO antenna system is composed of four linear polarization antenna units loaded with metamaterial surfaces and decoupling chips. The four antenna units are very close to each other, the working frequency range is 700-2700MHz, a double-layer super-surface coating is loaded above the four antennas, and the size of a resonance unit of the super-surface coating, the distance between the resonance units, the height of the coating and the array antenna and the dielectric constant and the thickness of a dielectric substrate supporting the resonance units are adjusted to ensure that
(1) The coupling coefficient between the units of the antenna system loaded with the super-surface coating is close to 0, and S21 is less than-20 dB;
(2) the gain of each antenna element of the antenna system loaded with the super-surface coating is improved compared with the gain of each antenna element of the antenna system not loaded with the super-surface coating.
A decoupling chip is loaded between every two antenna units, coupling waves can be filtered from the ground surface, the circuit is combined with the antenna, a frequency adjustable chip is selected, tuning can be carried out according to the working frequency band of the antenna, for example, the antenna needs to work at 700-plus-824 MHz, and the decoupling chip is tuned in a corresponding 700-plus-824 MHz working corresponding interval. Fig. 2 and fig. 3 are parameter diagrams S11 and parameter diagram S12 of a linear array MIMO antenna composed of four antenna units in this embodiment, respectively, and it can be seen from the diagrams that the method for improving coupling performance disclosed in the present invention can be well applied to a MIMO communication system.
The periodic resonance structure unit layer can be designed into more layers of periodic resonance structure units, and the bandwidth of the antenna can be further improved by adding the periodic resonance structure unit layer. The influence of the surface wave of the single-layer periodic resonant structure unit can be partially eliminated, and the transmission or reflection coefficient is improved.
The resonant unit in the super-surface covering layer can also adopt different structural forms, such as an open resonant ring, a metal short wire and the like, so as to adapt to the requirements of an actual antenna system. When the periodic resonant unit structure is selected, the periodic resonant unit structure is made to resonate in a desired frequency band according to an actual antenna system form. In the multi-layer periodic resonant unit structure layer, the resonant units of each layer can adopt the same or different structures.
The multiple layers of periodic resonance unit structure layers are respectively covered on one medium substrate layer, the medium substrate layers of the multiple layers are made of the same or different dielectric materials, and the medium substrate layers of the multiple layers are designed to have the same or different thicknesses according to actual requirements.
The decoupling chip selects one of a tuned, single frequency or multi-frequency chip.
The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose of the embodiments is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All modifications made according to the spirit of the main technical scheme of the invention are covered in the protection scope of the invention.
Claims (8)
1. A novel multi-antenna system, comprising from top to bottom:
a periodic resonant unit structure layer;
a dielectric substrate layer;
an antenna array;
a decoupling chip;
the periodic resonance unit structure layer is covered on the medium substrate layer to form a super-surface covering layer, and the super-surface covering layer covers the antenna array through a medium supporting column or an antenna housing structure; the antenna array is formed by a plurality of antenna unit arrays in a distributed mode, and the bottom ends of every two adjacent antenna units are connected through a decoupling chip.
2. The novel multiple antenna system of claim 1,
by adjusting the size of the resonance unit in the super-surface coating layer, the distance between the resonance units and the height of the coating layer and the array antenna, the coupling among the units in the multi-antenna system containing the super-surface coating layer is reduced, and the isolation is improved.
3. The novel multiple antenna system of claim 1,
by adjusting the size of the resonance unit, the distance between the resonance units and the height of the coating and the array antenna in the super-surface coating, the gain of the multi-antenna system with the super-surface coating is improved, and the radiation efficiency is increased.
4. The novel multiple antenna system of claim 1,
the resonance units in the super-surface covering layer adopt different structural forms so as to adapt to the requirements of an actual antenna system.
5. The novel multiple antenna system of claim 1,
the periodic resonant unit structure layer is designed to be multilayer, so that the bandwidth of the antenna is further improved, the influence of surface waves of a single-layer periodic resonant structure unit is partially eliminated, and the transmission or reflection coefficient is improved.
6. The novel multiple antenna system of claim 5,
in the multi-layer periodic resonance unit structure layer, the resonance units of each layer adopt the same or different structures.
7. The novel multiple antenna system of claim 6,
the multiple layers of periodic resonance unit structure layers are respectively covered on one medium substrate layer, the medium substrate layers of the multiple layers are made of the same or different dielectric materials, and the medium substrate layers of the multiple layers are designed to have the same or different thicknesses according to actual requirements.
8. The novel multiple antenna system of claim 1,
the decoupling chip selects one of a tuned, single frequency or multi-frequency chip.
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| CN202010460219.5A CN111600129A (en) | 2020-05-27 | 2020-05-27 | Novel multi-antenna system |
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| CN202010460219.5A CN111600129A (en) | 2020-05-27 | 2020-05-27 | Novel multi-antenna system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112563742A (en) * | 2020-12-03 | 2021-03-26 | 西安朗普达通信科技有限公司 | Novel broadband decoupling antenna housing |
| CN112768933A (en) * | 2020-12-30 | 2021-05-07 | 深圳市信丰伟业科技有限公司 | Novel low-frequency decoupling structure and small-sized terminal equipment |
| CN113471670A (en) * | 2021-07-02 | 2021-10-01 | 安徽大学 | 5G multi-frequency broadband dual-polarized base station antenna loaded with antenna decoupling surface |
| CN113517559A (en) * | 2021-03-25 | 2021-10-19 | 西安电子科技大学 | A high-isolation dual-frequency dual-polarized millimeter-wave array antenna |
| CN113922050A (en) * | 2021-11-03 | 2022-01-11 | 华南理工大学 | Double-cladding decoupling structure, dual-polarized antenna and antenna array |
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| EP2808946A1 (en) * | 2013-05-31 | 2014-12-03 | Commissariat à l'Énergie Atomique et aux Énergies Alternatives | Device for disrupting a propagation of electromagnetic waves and method for manufacturing same |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112563742A (en) * | 2020-12-03 | 2021-03-26 | 西安朗普达通信科技有限公司 | Novel broadband decoupling antenna housing |
| CN112768933A (en) * | 2020-12-30 | 2021-05-07 | 深圳市信丰伟业科技有限公司 | Novel low-frequency decoupling structure and small-sized terminal equipment |
| CN113517559A (en) * | 2021-03-25 | 2021-10-19 | 西安电子科技大学 | A high-isolation dual-frequency dual-polarized millimeter-wave array antenna |
| CN113471670A (en) * | 2021-07-02 | 2021-10-01 | 安徽大学 | 5G multi-frequency broadband dual-polarized base station antenna loaded with antenna decoupling surface |
| CN113471670B (en) * | 2021-07-02 | 2024-04-05 | 安徽大学 | 5G multi-frequency broadband dual-polarized base station antenna loaded with antenna decoupling surface |
| CN113922050A (en) * | 2021-11-03 | 2022-01-11 | 华南理工大学 | Double-cladding decoupling structure, dual-polarized antenna and antenna array |
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Application publication date: 20200828 |
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