CN115173073A - Aperiodic artificial magnetic conductor printed dipole antenna - Google Patents
Aperiodic artificial magnetic conductor printed dipole antenna Download PDFInfo
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- CN115173073A CN115173073A CN202210726710.7A CN202210726710A CN115173073A CN 115173073 A CN115173073 A CN 115173073A CN 202210726710 A CN202210726710 A CN 202210726710A CN 115173073 A CN115173073 A CN 115173073A
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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
- 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
- H01Q15/0013—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
- H01Q15/0046—Theoretical analysis and design methods of such selective devices
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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
- H01Q9/16—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole
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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 an aperiodic artificial magnetic conductor printed dipole antenna, which comprises an aperiodic artificial magnetic conductor and a printed dipole antenna, wherein the printed dipole antenna is arranged on the aperiodic artificial magnetic conductor; the printed dipole antenna is positioned right above the aperiodic artificial magnetic conductor; the artificial magnetic conductor units printed on the high-frequency substrate designed by the invention have consistent structures but not completely consistent sizes. For simple design, the aperiodic artificial magnetic conductor adopts a centrosymmetric structure. In order to consider practical application, a total of 72 artificial magnetic conductor units distributed in 8 rows and 9 columns are selected; the aperiodic artificial magnetic conductors are symmetrical up and down, and the artificial magnetic conductor unit structures of all the lines are the same in size; but the artificial magnetic conductors are different from the artificial magnetic conductors in other rows, and the central lines of all the rows are positioned on the same straight line; the non-periodic artificial magnetic conductor layer is positioned below the printed dipole antenna and replaces the metal ground of the traditional printed dipole antenna. Structural parameters of the printed dipole antenna and the aperiodic artificial magnetic conductor are optimized through a genetic algorithm, and a low profile and a broadband are realized.
Description
Technical Field
The invention relates to the field of antennas, in particular to an aperiodic artificial magnetic conductor printed dipole antenna.
Background
Metamaterials have received attention from many researchers in recent years because of their physical properties that do not exist in nature. The research of the metamaterial has great scientific significance to the field of electromagnetism, and has wide application prospect in the engineering field of manufacturing wireless communication equipment. The metamaterials currently associated with electromagnetism can be largely classified as: left-handed materials (LHM) with negative dielectric constant and permeability, right/Left-handed composite transmission lines (CRLH) with broadband, low loss and easy processing characteristics different from conventional transmission lines, electromagnetic band gap structures (EBG) that resemble the microwave band according to the photonic band gap concept, and Artificial Magnetic Conductors (AMC) that can achieve zero-phase reflection of Electromagnetic waves in some frequency bands, and so on. The artificial magnetic conductor is discovered by American scholars D.Sieven pipe who studies mushroom-type electromagnetic band gap characteristics.
Most of the research on the traditional artificial magnetic conductor is still a periodic structure with the same unit size and interval size. There has been little research on application of aperiodic artificial magnetic conductors and aperiodic artificial magnetic conductors to the field of antennas.
Disclosure of Invention
In view of the above defects in the prior art, the aperiodic artificial magnetic conductor printed dipole antenna provided by the invention provides an aperiodic artificial magnetic conductor antenna with better performance index than that of the conventional periodic artificial magnetic conductor antenna.
In order to achieve the purpose of the invention, the invention adopts the technical scheme that:
an aperiodic artificial magnetic conductor printed dipole antenna is provided, which comprises an aperiodic artificial magnetic conductor and a printed dipole antenna; the printed dipole antenna is positioned right above the aperiodic artificial magnetic conductor; the aperiodic artificial magnetic conductor comprises a first medium substrate, wherein 72 artificial magnetic conductor units distributed according to 8 rows and 9 columns are arranged on the first medium substrate; the aperiodic artificial magnetic conductors are vertically symmetrical, and the artificial magnetic conductor unit structures of all the lines are the same in size; the central lines of each row are positioned on the same straight line;
parameters of the aperiodic artificial magnetic conductor are automatically optimized through a genetic algorithm based on the profile height of the whole antenna structure, and the optimization target is a broadband low profile.
Further, the fitness function in the genetic algorithm is:
Fun＝(BW_R1-BW_L1)×K 1 +hx×K 2
wherein Fun represents a fitness function value; BW _ R1 represents the right frequency point of the optimized impedance bandwidth; BW _ L1 is a left frequency point of the optimized impedance bandwidth; k 1 And K 2 Respectively are the weight parameters of the bandwidth and the low profile; hx is the profile height of the whole antenna structure; and after the iteration of the genetic algorithm is finished, taking the parameter corresponding to the population individual with the maximum fitness function value as the parameter of the aperiodic artificial magnetic conductor.
Further, K 1 ＝0.6，K 2 ＝0.4。
Further, the width dy of each artificial magnetizer unit is 9.25mm; the length dx1 of the artificial magnetizer units of the 1 st and 8 th rows is 11mm; the length dx2 of the artificial magnetizer units of the 2 nd and the 7 th rows is 8.7mm; the length dx3 of the artificial magnetizer units in the 3 rd row and the 6 th row is 8.3mm; the length dx4 of the artificial magnetizer units of the 4 th row and the 5 th row is 7.7mm; the distance between two adjacent rows is 1.725mm, and the distance between two adjacent artificial magnetizer units in the same row is 1.725mm.
Furthermore, the printed dipole antenna comprises a second dielectric substrate, and two trapezoidal antenna radiation patches are symmetrically arranged on the upper surface of the second dielectric substrate;
the length L2 of an upper layer feeder line of the second dielectric substrate is 12.4mm; the width W3 of the lower gradient trapezoidal feeder of the second dielectric substrate is 2.7mm; the length W of the second dielectric substrate is 46.5mm; the width L of the second dielectric substrate is 50mm;
the distance S between the two trapezoidal antenna radiation patches is 2.4mm; the width W1 of the upper bottom of the single trapezoid antenna radiation patch is 12.9mm, the width W2 of the lower bottom is 21.2mm, and the height L1 is 10.7mm.
The invention has the beneficial effects that: compared with the traditional periodic artificial magnetic conductor antenna, the aperiodic artificial magnetic conductor printed dipole antenna not only keeps the low-profile characteristic of the antenna, but also has wider bandwidth.
Drawings
Fig. 1 is a top view of the present aperiodic artificial magnetic conductor printed dipole antenna;
FIG. 2 is a side view of the present aperiodic artificial magnetic conductor printed dipole antenna;
FIG. 3 is a schematic diagram of a simulation curve of the aperiodic artificial magnetic conductor printed dipole antenna | S11 |;
FIG. 4 is an E-plane pattern of the present aperiodic artificial magnetic conductor printed dipole antenna;
fig. 5 is the H-plane pattern of the aperiodic artificial magnetic conductor printed dipole antenna.
Wherein: 1. a first dielectric substrate; 2. a second dielectric substrate; 3. a trapezoidal antenna radiation patch; 4. an artificial magnetizer unit.
Detailed Description
The following description of the embodiments of the present invention is provided to facilitate the understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and it will be apparent to those skilled in the art that various changes may be made without departing from the spirit and scope of the invention as defined and defined in the appended claims, and all matters produced by the invention using the inventive concept are protected.
As shown in fig. 1 and 2 (where Coaxial cable represents a Coaxial cable feed, AMC represents an artificial magnetic conductor unit 4, and ground plane represents a ground plane), the aperiodic artificial magnetic conductor printed dipole antenna comprises an aperiodic artificial magnetic conductor and a printed dipole antenna; the printed dipole antenna is positioned right above the aperiodic artificial magnetic conductor; the aperiodic artificial magnetic conductor comprises a first medium substrate 1, wherein 72 artificial magnetic conductor units 4 distributed according to 8 rows and 9 columns are arranged on the first medium substrate 1; the aperiodic artificial magnetic conductors are vertically symmetrical, and the artificial magnetic conductor units 4 in each row have the same structure size; the central lines of each row are positioned on the same straight line;
parameters of the aperiodic artificial magnetic conductor are automatically optimized through a genetic algorithm based on the profile height of the whole antenna structure, and the optimization target is a broadband low profile. The parameters optimized by the genetic algorithm are specifically: the width W1 of the upper bottom of the single ladder antenna radiation patch 3, the width W2 of the lower bottom of the single ladder antenna radiation patch 3, the height L1 of the single ladder antenna radiation patch 3, the length L2 of the upper layer feeder of the second dielectric substrate 2, the width W3 of the lower layer gradient ladder feeder of the second dielectric substrate 2, the width L of the second dielectric substrate 2, the distance S between the two ladder antenna radiation patches 3, the width and the length of each artificial magnetizer unit 4, the distance between two adjacent rows of artificial magnetizer units 4, and the distance between two adjacent artificial magnetizer units 4 in the same row.
The fitness function in the genetic algorithm is:
Fun＝(BW_R1-BW_L1)×K 1 +hx×K 2
wherein Fun represents a fitness function value; BW _ R1 represents the right frequency point of the optimized impedance bandwidth; BW _ L1 is a left frequency point of the optimized impedance bandwidth; k 1 And K 2 Respectively are the weight parameters of the bandwidth and the low profile; hx is the profile height of the whole antenna structure; and after the iteration of the genetic algorithm is finished, taking the parameter corresponding to the population individual with the maximum fitness function value as the parameter of the aperiodic artificial magnetic conductor. K is 1 ＝0.6，K 2 ＝0.4。
In one embodiment of the invention, the width dy of each artificial magnetizer unit 4 is 9.25mm; the length dx1 of the artificial magnetizer unit 4 of the 1 st and 8 th rows is 11mm; the length dx2 of the artificial magnetizer unit 4 of the 2 nd and 7 th rows is 8.7mm; the length dx3 of the artificial magnetizer unit 4 of the 3 rd row and the 6 th row is 8.3mm; the length dx4 of the artificial magnetizer unit 4 of the 4 th row and the 5 th row is 7.7mm; the distance between two adjacent rows is 1.725mm, and the distance between two adjacent artificial magnetizer units 4 in the same row is 1.725mm.
The printed dipole antenna comprises a second dielectric substrate 2, and two trapezoidal antenna radiation patches 3 are symmetrically arranged on the upper surface of the second dielectric substrate 2; the length L2 of the upper layer feeder line of the second dielectric substrate 2 is 12.4mm; the width W3 of the lower gradient trapezoid feeder line of the second dielectric substrate 2 is 2.7mm; the length W of the second dielectric substrate 2 is 46.5mm; the width L of the second dielectric substrate 2 is 50mm; the space S between the two trapezoidal antenna radiation patches 3 is 2.4mm; the width W1 of the upper base of the single ladder antenna radiation patch 3 is 12.9mm, the width W2 of the lower base is 21.2mm, and the height L1 is 10.7mm. The two dielectric substrates can adopt dielectric substrates with the dielectric constant of 4.3, and can adopt FR-4 materials.
And constructing a real object based on the parameters and carrying out S parameter test and directional diagram test. The S parameter test results are shown in fig. 3, 4 and 5. It can be seen that the E plane of the directional diagram test is well matched, and the H plane has deviation, which may mainly be the measurement error caused by the limited processing precision and the influence of the test environment.
The performance of the aperiodic artificial magnetic conductor printed dipole antenna is compared with that of the existing antenna, and the comparison result is shown in table 1.
TABLE 1
As can be seen from table 1, the bandwidth of the antenna is greater than that of the printed dipole antenna without the artificial magnetic conductor and that of the printed dipole antenna with the periodic artificial magnetic conductor, and the thickness of the antenna is smaller than that of the printed dipole antenna without the artificial magnetic conductor and that of the printed dipole antenna with the periodic artificial magnetic conductor.
Claims (5)
1. An aperiodic artificial magnetic conductor printed dipole antenna, comprising an aperiodic artificial magnetic conductor and a printed dipole antenna; the printed dipole antenna is positioned right above the aperiodic artificial magnetic conductor; the aperiodic artificial magnetic conductor comprises a first medium substrate (1), wherein 72 artificial magnetic conductor units (4) distributed according to 8 rows and 9 columns are arranged on the first medium substrate (1); the aperiodic artificial magnetic conductors are symmetrical up and down, and the artificial magnetic conductor units (4) in each row have the same structure size; the central lines of each row are positioned on the same straight line;
parameters of the aperiodic artificial magnetic conductor are automatically optimized through a genetic algorithm based on the profile height of the whole antenna structure, and the optimization target is a broadband low profile.
2. A non-periodic artificial magnetic conductor printed dipole antenna according to claim 1, wherein the fitness function in the genetic algorithm is:
Fun＝(BW_R1-BW_L1)×K 1 +hx×K 2
wherein Fun represents a fitness function value; BW _ R1 represents the right frequency point of the optimized impedance bandwidth; BW _ L1 is a left frequency point of the optimized impedance bandwidth; k is 1 And K 2 Respectively are the weight parameters of the bandwidth and the low profile; hx is the profile height of the whole antenna structure; and after the iteration of the genetic algorithm is finished, taking the parameter corresponding to the population individual with the maximum fitness function value as the parameter of the aperiodic artificial magnetic conductor.
3. An aperiodic artificial magnetic conductor printed dipole antenna as recited in claim 2, wherein K 1 ＝0.6，K 2 ＝0.4。
4. A non-periodic artificial magnetic conductor printed dipole antenna according to claim 1, characterized in that the width dy of each artificial magnetic conductor unit (4) is 9.25mm; the length dx1 of the artificial magnetizer unit (4) in the 1 st and 8 th rows is 11mm; the length dx2 of the artificial magnetizer unit (4) in the 2 nd row and the 7 th row is 8.7mm; the length dx3 of the artificial magnetizer unit (4) in the 3 rd row and the 6 th row is 8.3mm; the length dx4 of the artificial magnetizer unit (4) of the 4 th row and the 5 th row is 7.7mm; the distance between two adjacent rows is 1.725mm, and the distance between two adjacent artificial magnetizer units (4) in the same row is 1.725mm.
5. A non-periodic artificial magnetic conductor printed dipole antenna according to claim 1, characterized in that the printed dipole antenna comprises a second dielectric substrate (2), the upper surface of the second dielectric substrate (2) is symmetrically provided with two trapezoidal antenna radiation patches (3);
the length L2 of an upper layer feeder line of the second dielectric substrate (2) is 12.4mm; the width W3 of the lower gradient trapezoidal feeder of the second dielectric substrate (2) is 2.7mm; the length W of the second dielectric substrate (2) is 46.5mm; the width L of the second dielectric substrate (2) is 50mm;
the distance S between the two trapezoidal antenna radiation patches (3) is 2.4mm; the width W1 of the upper bottom of the single trapezoid antenna radiation patch (3) is 12.9mm, the width W2 of the lower bottom is 21.2mm, and the height L1 is 10.7mm.
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