CN109509977B - Monopole antenna loaded with round-loop left-handed material unit - Google Patents
Monopole antenna loaded with round-loop left-handed material unit Download PDFInfo
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- CN109509977B CN109509977B CN201910000712.6A CN201910000712A CN109509977B CN 109509977 B CN109509977 B CN 109509977B CN 201910000712 A CN201910000712 A CN 201910000712A CN 109509977 B CN109509977 B CN 109509977B
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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
- H01Q1/50—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
- 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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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/30—Resonant antennas with feed to end of elongated active element, e.g. unipole
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/30—Resonant antennas with feed to end of elongated active element, e.g. unipole
- H01Q9/40—Element having extended radiating surface
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The invention discloses a monopole antenna loaded with a round-loop left-handed material unit, and relates to the field of wireless communication. The monopole antenna is of a planar structure and comprises: the antenna comprises a dielectric plate (1), a coplanar waveguide (2), a semi-annular radiation patch (3) and an arc microstrip line (4); one end of a feeder line (20) of the coplanar waveguide (2) for feeding is connected with the center position of the semi-annular radiation patch (3), and the arc-shaped microstrip line (4) is positioned right above the semi-annular radiation patch (3); an array (5) formed by a plurality of circular left-handed material units is printed between the semi-circular radiation patch (3) and the arc microstrip line (4). The monopole antenna loaded with the round left-handed material unit realizes better impedance matching of the common monopole antenna by loading the round left-handed material unit, and meanwhile, gain is improved.
Description
Technical Field
The invention belongs to the field of wireless communication, and relates to a monopole antenna loaded with a round-loop left-handed material unit.
Background
Left-hand materials are the most classical metamaterials and are defined as having both negative permittivity and negative permeability in certain frequency bands. Is composed of artificial unit structures with periodic dimensions much smaller than the operating wavelength, and such materials can exhibit extraordinary physical properties that are not possessed by natural materials.
With the rapid development of information technology, wireless communication technology can transmit and exchange information anytime and anywhere because it is not constrained by geographical environment, and is widely applied to the aspects of people's life and social development, and meanwhile, the diversification of wireless communication modes greatly facilitates people's life and work. In a wireless communication system which is visible everywhere, information is often transmitted through wireless electromagnetic waves, and an antenna is an important component in the wireless communication system, and the efficiency and quality of wireless communication are intuitively affected by the quality of the antenna. With the rapid growth of various communication systems today, the desire of the industry for achieving multiple performances and indexes of antennas simultaneously is increasing, and good performance parameters need to develop more novel and specific structures in the design of antennas, and high-quality plates are needed to support the antenna design, so that it is obvious that the cost of antennas is improved dramatically in an intangible way. However, the metamaterial can be used for solving the problem, and the loading of the metamaterial can be designed to control the cost of manufacturing the antenna and improve multiple performance parameters of the antenna, so that the metamaterial and the antenna are effectively combined, and the research on improving the performance parameters of the antenna has profound value and significance.
In recent years, many scholars have made substantial progress in applying metamaterials to antenna designs. The metamaterial is used as a brand new artificial electromagnetic material, has a series of peculiar physical properties such as negative refractive index, negative group velocity, inverse Doppler effect and the like, and can be applied to the traditional antenna design to remarkably improve the working performance of the antenna, such as gain improvement, bandwidth increase, miniaturization, realization of multiple frequency bands, reduction of coupling among antennas and the like. It is worth noting that the novel antenna based on the metamaterial not only can improve one index, but also can improve a plurality of indexes.
The monopole antenna loaded with the round left-handed material unit realizes better impedance matching by loading the round left-handed material unit, and meanwhile, gain is improved, and the monopole antenna has the advantages of small size, simple structure, easiness in processing, high gain, low loss and the like.
The content of the invention is searched by the literature, and the same disclosure report as the invention is not found.
Disclosure of Invention
It is an object of the present invention to provide a monopole antenna loaded with a rounded left-handed material element. The monopole antenna loaded with the round-loop left-handed material unit comprises: the antenna comprises a dielectric plate (1), a coplanar waveguide (2), a semi-annular radiation patch (3) and an arc microstrip line (4); one end of a feeder line (20) of the coplanar waveguide (2) for feeding is connected with the center position of the semi-annular radiation patch (3), and an arc microstrip line (4) above the semi-annular radiation patch (3) is a near-field resonance parasitic unit of the semi-annular radiator; an array (5) formed by circular left-handed material units is printed between the semi-circular radiation patch (3) and the arc microstrip line (4); each unit of the left-handed material unit array (5) comprises a dielectric plate (9) and a circular patch (10) printed on the dielectric plate (9); the circular patch (10) is composed of two outer semicircles (6, 6 '), two inner semicircles (7, 7') and a microstrip line (8) passing through the center of the circle; the two outer semicircles (6, 6 ') are arranged up and down, and the two inner semicircles (7, 7') are arranged left and right by rotating 90 degrees around the center of the circle compared with the outer semicircles.
The monopole antenna loaded with the circular left-handed material unit can realize good impedance matching with the driving unit by adjusting the arc parasitic unit, and the size of the near-field resonance parasitic unit is far larger than that of the driving unit, so that the arc parasitic unit is a main radiator of the antenna.
The monopole antenna loaded with the circular left-handed material units is characterized in that an array (5) formed by the circular left-handed material units printed between the semi-annular radiation patch (3) and the arc microstrip line (4) can be formed by 1-3 circular left-handed material units, and when only 1 circular left-handed material unit is loaded, the left-handed material units are positioned at the horizontal and vertical central positions between the semi-annular radiation patch (3) and the arc microstrip line (4); when 2 circular left-handed material units are loaded, the left-handed material units and the right-handed material units are vertically centered between the semi-annular radiation patch (3) and the arc-shaped microstrip line (4) and symmetrically distributed on two sides of a central line; when loading 3 left-handed material units in the shape of a circular loop, the middle left-handed material unit translates upward a half of the inner circular radius in a vertical direction relative to the 2 units on the left and right sides, and the 3 left-handed material units form an inverted V-shaped array.
The monopole antenna loaded with the round-loop left-handed material unit adopts an FR4 dielectric plate with the thickness of 1.2mm and the size of 25mmX30mm; the size of the left hand material unit is 5mmX5mm.
The invention has the advantages of small size, simple structure, easy processing, high gain, low loss and the like.
Drawings
Fig. 1 is a schematic diagram of a monopole antenna structure
FIG. 2 is a schematic diagram of a round left-handed material unit structure
Fig. 3 is a schematic diagram of a monopole antenna structure loaded with 1-3 left-handed material units
Fig. 4 is a graph of return loss vs. a monopole antenna loaded with a round loop left-handed material element
Fig. 5 is a diagram of a monopole antenna loaded with a circular loop left-handed material element
Fig. 6 is a graph of the radiation efficiency versus a monopole antenna loaded with a rounded left-handed material element.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
As shown in fig. 1, fig. 2 and fig. 3, the monopole antenna loaded with the circular-loop left-handed material unit comprises a dielectric plate (1), a coplanar waveguide (2), a semi-annular radiation patch (3) and an arc microstrip line (4); one end of a feeder line (20) of the coplanar waveguide (2) for feeding is connected with the center position of the semi-annular radiation patch (3), and an arc microstrip line (4) above the semi-annular radiation patch (3) is a near-field resonance parasitic unit of the semi-annular radiator; an array (5) formed by circular left-handed material units is printed between the semi-circular radiation patch (3) and the arc microstrip line (4); each unit of the left-handed material unit array (5) comprises a dielectric plate (9) and a circular patch (10) printed on the dielectric plate (9); the circular patch (10) is composed of two outer semicircles (6, 6 '), two inner semicircles (7, 7') and a microstrip line (8) passing through the center of the circle; the two outer semicircles (6, 6 ') are arranged up and down, and the two inner semicircles (7, 7') are arranged left and right by rotating 90 degrees around the center of the circle compared with the outer semicircles. The monopole antenna loaded with the circular left-handed material unit can realize good impedance matching with the driving unit by adjusting the arc parasitic unit, and the size of the near-field resonance parasitic unit is far larger than that of the driving unit, so that the arc parasitic unit is a main radiator of the antenna.
The monopole antenna loaded with the circular left-handed material units is characterized in that an array (5) formed by the circular left-handed material units printed between the semi-annular radiation patch (3) and the arc microstrip line (4) can be formed by 1-3 circular left-handed material units, and when only 1 circular left-handed material unit is loaded, the left-handed material units are positioned at the horizontal and vertical central positions between the semi-annular radiation patch (3) and the arc microstrip line (4); when 2 circular left-handed material units are loaded, the left-handed material units and the right-handed material units are vertically centered between the semi-annular radiation patch (3) and the arc-shaped microstrip line (4) and symmetrically distributed on two sides of a central line; when loading 3 left-handed material units in the shape of a circular loop, the middle left-handed material unit translates upward a half of the inner circular radius in a vertical direction relative to the 2 units on the left and right sides, and the 3 left-handed material units form an inverted V-shaped array.
The monopole antenna loaded with the round-loop left-handed material unit adopts an FR4 dielectric plate with the thickness of 1.2mm and the size of 25mmX30mm; the size of the left hand material unit is 5mmX5mm.
Multiple adjustment experiments are carried out on the antenna through simulation software, and a comparison chart of return loss of the antenna loaded with different numbers is shown as figure 4, and the chart shows that when the antenna is not loaded with left-handed materials, the frequency band of S11< -10dB is 5.27GHz-7.9GHz, the resonance point is 5.6GHz, the S11 value at the resonance point is-31 dB, and meanwhile, a resonance point with the S11 value of-21 dB exists near 6.5 GHz; the working bandwidth of the antenna loaded with a round-shaped left-handed material unit is 5.59GHz-8.2GHz, the whole antenna moves by nearly 300MHz towards high frequency than the antenna which is not loaded with left-handed material, the resonance point moves up to 5.8GHz, the S11 value is-29 dB, the bandwidths of the antenna loaded with two left-handed material units are almost consistent with the bandwidth and the resonance point loaded with one left-handed material, and the difference is that the antenna obtains better impedance matching at the resonance point, and the S11 value is-42 dB; when the number of left-hand material units is loaded to three, the operating bandwidth of the antenna operation and the values at the resonance point and resonance point all show a slight downward trend. In general, loading left-handed material has little effect on the bandwidth of the antenna.
The antenna is loaded with different numbers of patterns at 5.6GHz versus the pattern shown in fig. 5, where fig. 5 (a) is the xoz plane pattern of the antenna and fig. 5 (b) is the yoz plane pattern of the antenna. In order to facilitate analysis of the effect of each component on the overall radiation of the antenna during the radiation process of the antenna, the present section describes the pattern of the antenna by means of co-and cross-polarization of the two components. In fig. 5 (a), the gain of the co-polarization of the antenna xoz plane is respectively 2.23dB, 2.75dB, 3.45dB and 3.21dB when the number of left-handed material units is increased from 0 to 3; in fig. 5 (b), the gain of the co-polarization of the antenna yoz plane is respectively 1.98dB, 2.45dB, 2.97dB, and 2.78dB when the number of left-hand material units is increased from 0 to 3. It can be seen that the gain of the antenna is improved due to the addition of the loop-shaped left-handed material units, but when the number of the loop-shaped left-handed material units is increased to three, the radiation of the antenna is blocked to a certain extent due to the matching reason, so that the two loop-shaped left-handed material units are loaded near the antenna near-field parasitic unit. And by comparing the xoz plane and yoz plane patterns, we find that the xoz plane cross polarization of the antenna is extremely small and the radiation is hardly affected by it, but the cross polarization of the yoz plane is not significantly much smaller than co-polarization, and yet needs to be improved.
As shown in FIG. 6, it can be seen from the graph that, as the number of the loaded circular I-shaped left-hand materials increases, the gain of the antenna is continuously increased, so that the radiation efficiency of the antenna shows an increasing trend, and the radiation efficiency fluctuates differently in the working frequency band but is more than 88%, so that good radiation can be realized.
Claims (2)
1. The monopole antenna loaded with the round-shaped left-handed material unit is characterized in that: the monopole antenna is of a planar structure and comprises: the antenna comprises a dielectric plate (1), a coplanar waveguide (2), a semi-annular radiation patch (3) and an arc microstrip line (4); one end of a feeder line (20) of the coplanar waveguide (2) for feeding is connected with the center position of the semi-annular radiation patch (3), and the arc microstrip line (4) is positioned right above the semi-annular radiation patch (3) and is a near-field resonance parasitic unit of the semi-annular radiator; an array (5) formed by circular left-handed material units is printed between the semi-circular radiation patch (3) and the arc microstrip line (4); each unit of the left-handed material unit array (5) comprises a dielectric plate (9) and a circular patch (10) printed on the dielectric plate (9); the circular patch (10) is composed of two outer semicircles (6, 6 '), two inner semicircles (7, 7') and a microstrip line (8) passing through the center of the circle; the two outer semicircles (6, 6 ') are arranged up and down, and the two inner semicircles (7, 7') are rotated by 90 degrees around the center of the circle in comparison with the outer semicircles and are arranged left and right;
the antenna can realize good impedance matching with the driving unit by adjusting the arc parasitic unit, and the size of the near-field resonance parasitic unit is far larger than that of the driving unit, so that the arc parasitic unit is a main radiator of the antenna;
an array (5) of circular left-handed material units printed between the semi-annular radiating patches (3) and the arc-shaped microstrip lines (4) is composed of 3 circular left-handed material units, the middle left-handed material unit is shifted upwards by a distance of half an inner circular radius in a vertical direction relative to 2 units on the left side and the right side, and the 3 left-handed material units form an inverted V-shaped array.
2. The monopole antenna loaded with a round loop left handed material element of claim 1 wherein: an FR4 medium plate with the thickness of 1.2mm is adopted, and the size is 25mmX30mm; the size of the left hand material unit is 5mmX5mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910000712.6A CN109509977B (en) | 2019-01-02 | 2019-01-02 | Monopole antenna loaded with round-loop left-handed material unit |
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| CN201910000712.6A CN109509977B (en) | 2019-01-02 | 2019-01-02 | Monopole antenna loaded with round-loop left-handed material unit |
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| CN109509977A CN109509977A (en) | 2019-03-22 |
| CN109509977B true CN109509977B (en) | 2023-08-08 |
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| CN113258279B (en) * | 2021-05-12 | 2022-07-05 | 福州大学 | 5G full-network-through miniaturized omnidirectional antenna based on metamaterial loading |
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| CN210111035U (en) * | 2019-01-02 | 2020-02-21 | 云南大学 | Novel monopole antenna loaded with left-handed material unit |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US20090140946A1 (en) * | 2007-10-31 | 2009-06-04 | Ziolkowski Richard W | Efficient metamaterial-inspired electrically-small antenna |
| WO2010105109A2 (en) * | 2009-03-11 | 2010-09-16 | Rayspan Corporation | High gain metamaterial antenna device |
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2019
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