CN116315635A - Directional diagram reconfigurable antenna based on common mode and differential mode theory - Google Patents

Directional diagram reconfigurable antenna based on common mode and differential mode theory Download PDF

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Publication number
CN116315635A
CN116315635A CN202310255332.3A CN202310255332A CN116315635A CN 116315635 A CN116315635 A CN 116315635A CN 202310255332 A CN202310255332 A CN 202310255332A CN 116315635 A CN116315635 A CN 116315635A
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China
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antenna
pattern
shaped branch
coupling feed
feed structure
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陈波
陈梦龙
胡皓全
徐元朝
孙凯
雷世文
田径
杨伟
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University of Electronic Science and Technology of China
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University of Electronic Science and Technology of China
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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
    • 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
    • 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
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
    • 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 belongs to the technical field of reconfigurable antennas, and particularly provides a directional diagram reconfigurable antenna based on common mode and differential mode theory, which is used for solving the problems of oversized size, higher cost, complex structure, few reconfiguration states and the like of the conventional directional diagram reconfigurable antenna, thereby meeting the development requirements of miniaturization, low cost and multiple state directions of the antenna. Based on the common mode/differential mode principle, the multiple-mode directional patterns share the same radiating unit, and a double-fed structure is adopted, so that a forward radiation directional pattern or a conical directional pattern is generated when one single antenna is fed, and a left inclined directional pattern or a right inclined directional pattern is generated when two coupling feed structures are fed in the same phase or in opposite phase with each other in constant amplitude. In summary, the invention can realize the reconstruction among the forward radiation pattern, the conical pattern and the left and right oblique patterns, and the reconstruction mode is simple and has universality; meanwhile, the antenna has the advantages of simple structure, small size, low cost and the like.

Description

Directional diagram reconfigurable antenna based on common mode and differential mode theory
Technical Field
The invention belongs to the technical field of reconfigurable antennas, and particularly provides a directional diagram reconfigurable antenna based on common mode and differential mode theory.
Background
Compared with the traditional antenna, the directional diagram reconfigurable antenna can be switched among different types of directional diagrams, and has the advantages of small volume, light weight, low cost, high sensitivity and the like.
Currently, reconfigurable patterns mainly include cone patterns (compact patterns), end-fire patterns (end-fire patterns), oblique patterns (tilt patterns), forward radiation patterns (broadside pattern), backward radiation patterns (backfire patterns), and the like; the conical-forward radiation pattern reconfigurable antenna and the inclined-forward radiation pattern reconfigurable antenna are more studied and can be applied to multiple scenes such as vehicle-mounted communication, base station communication and handheld terminal communication; the pattern reconfigurable method mainly adopts a characteristic mode method, a reconfigurable feed network, a direction/reverse direction, local excitation and the like. For example, a conical-forward radiation pattern reconfigurable antenna designed based on the switching principle is described in Ren Q et al (Ren Q, qian B, chen X, et al linear Antenna Array With Large Element Spacing for Wide-Angle Beam Scanning With Suppressed Grating Lobes [ J ]. IEEE Antennas and Wireless Propagation Letters,2022,21 (6): 1258-1262), and the reconstruction between the forward radiation pattern and the conical radiation pattern is achieved by feed port switching; however, antenna pattern types are still limited, while antenna sizes are large, which is detrimental to the design and fabrication of integrated systems, and is costly. For example, wang Z et al (Wang Z, dong Y, peng Z, et al hybrid Metal, dielectric Resonator, low-Cost, wire-Angle Beam-Scanning Antenna for 5G Base Station Application[J ]. IEEE Transactions on Antennas and Propagation,2022,70 (9): 7646-7658.) propose a tilt-forward radiation pattern reconfigurable antenna based on the Huygens principle, by switching the feed network, a reconfiguration between the forward radiation pattern and the left and right tilt patterns can be achieved; however, the floor of the antenna is of a defective structure, the size of the antenna is large, meanwhile, the implementation mode of the Huygens is in a dielectric resonance mode, the cost is high, and the application scene is limited.
However, the research on the conical-inclined-forward radiation pattern reconfigurable antenna is less, the conventional implementation method has no universality, and the defects of complex antenna design, higher cost, larger volume and the like are also caused; in addition, in order to be suitable for more complex and diverse application scenes, the unique advantages of the reconfigurable antenna are exhibited, and the directional pattern reconfigurable antenna is developed towards miniaturization, low cost and multiple states.
Disclosure of Invention
The invention aims to provide a pattern reconfigurable antenna based on common mode and differential mode theory, aiming at the problems of oversized size, higher cost, complex structure, few reconfiguration states and the like of the existing pattern reconfigurable antenna, thereby meeting the development requirements of antenna miniaturization, low cost and multi-state directions. The invention is based on the common mode/differential mode principle, the multiple-mode directional diagrams share the same radiation unit, and the reconstruction among the forward radiation directional diagram, the conical directional diagram and the left and right oblique directional diagrams can be realized; meanwhile, the antenna has the advantages of simple structure, small size, low cost and the like, and has higher application value.
In order to achieve the above purpose, the invention adopts the following technical scheme:
a pattern reconfigurable antenna based on common mode and differential mode theory, comprising: the upper layer dielectric substrate 1, the lower layer dielectric substrate 2, the nylon support column 3, the first coaxial cable 4 and the second coaxial cable 5 are arranged above the lower layer dielectric substrate through the nylon support column, and an air interlayer is formed between the upper layer dielectric substrate and the lower layer dielectric substrate; the method is characterized in that:
the lower surface of the lower dielectric substrate 2 is provided with a metal ground 11;
the upper surface of the upper medium substrate 1 is provided with a rectangular radiation patch 6, a central disc 7 and a stub 8, and the lower surface of the upper medium substrate 1 is provided with a left L-shaped branch 9 and a right L-shaped branch 10; the center of the rectangular radiation patch is provided with a circular groove, and the center disc is positioned at the center of the circular groove; the left L-shaped branch and the right L-shaped branch are symmetrically arranged about the central line of the lower surface of the upper medium substrate, the tail end of the short branch of the right L-shaped branch is provided with a circular metal connecting sheet, the left L-shaped branch is connected with a short-circuit metal column to form a short-circuit line, and the left L-shaped branch and the right L-shaped branch are respectively connected with a metal ground through the short-circuit metal column;
the inner conductor of the first coaxial cable 4 is connected with the stub and the left L-shaped branch through the stub, and the outer conductor of the first coaxial cable 4 is connected with the right L-shaped branch 10 through the annular metal connecting sheet and is connected with the metal ground; the inner conductor of the second coaxial cable 5 is connected to the central disc 7 and the outer conductor is connected to the metal ground.
Further, the first coaxial cable 4, the stub 8, the left L-shaped branch 9 and the right L-shaped branch 10 together form a first coupling feed structure, and perform coupling feed on the rectangular radiation patch 6; the coaxial cable 5 and the central disc 7 form a second coupling feed structure for coupling feeding the rectangular radiating patch 6.
Further, when the first coupling feed structure is fed alone, the antenna generates a forward radiation pattern, when the second coupling feed structure is fed alone, the antenna generates a taper pattern, when the first coupling feed structure and the second coupling feed structure are fed in equal amplitude and in phase (common mode feed), the antenna generates a left tilt pattern, and when the first coupling feed structure and the second coupling feed structure are fed in equal amplitude and in opposite phase (differential mode feed), the antenna generates a right tilt pattern.
Further, the radiation size of the pattern reconfigurable antennaIs 0.46 lambda 0 ×0.23λ 0 ×0.11λ 0 ，λ 0 Is the working wavelength at the central frequency point of the antenna.
In terms of working principle:
when the first coupling feed structure is fed independently, the left current direction and the right current direction on the antenna radiation patch are consistent, and the antenna radiation patch can be equivalently horizontally placed as a dipole, and a horizontal polarization forward radiation pattern is generated due to the existence of metal ground; similarly, when the second coupling feed structure is fed independently, the left current and the right current on the antenna radiation patch are opposite in direction, and the antenna radiation patch can be equivalently vertically placed as a monopole, and a vertical polarization cone pattern is generated due to the existence of metal ground; the forward radiation pattern and the conical pattern are orthogonal in polarization mode, so that the first coupling feed structure and the second coupling feed structure have high isolation. When the first coupling feed structure and the second coupling feed structure are simultaneously fed in the same phase (common mode feed), the left current direction on the antenna radiation patch is consistent and enhanced, the right current direction is opposite and counteracted, the antenna radiation patch can be equivalently used as a radiator on the left side, and the reflector on the right side, so that a left oblique direction diagram is generated; similarly, when the first coupling feed structure and the second coupling feed structure are simultaneously fed in equal-amplitude opposite phases (differential mode feed), the right current direction on the antenna radiation patch is consistent and enhanced, the left current direction is opposite and counteracted, the antenna radiation patch can be equivalently used as a radiator on the right side, and the reflector on the left side, so that a rightward inclined directional diagram is generated.
In summary, based on the above technical scheme, the beneficial effects of the invention are as follows:
1. the directional diagram reconfigurable antenna provided by the invention can realize four kinds of reconfiguration directional diagrams, namely a forward radiation directional diagram, a conical directional diagram, a left inclination directional diagram and a right inclination directional diagram, has a simple reconfiguration mode and universality, and can be applied to various working scenes, such as internet of things (IoT), unmanned aerial vehicle communication, vehicle-mounted communication, a base station and the like.
2. The radiation structure of the antenna main body with the reconfigurable pattern can be realized by a printed PCB, and has low cost and simple processing; the overall size of the antenna is 0.46 lambda 0 ×0.23λ 0 ×0.11λ 0 The miniaturization advantage of the whole antenna is obvious and is smaller than half wavelength, so that the antenna can be used independently and can be used in a large-scale wave beam scanning array.
Drawings
Fig. 1 is a schematic diagram of a reconfigurable antenna based on common mode and differential mode theory.
Fig. 2 is a schematic structural diagram of an upper dielectric substrate in a pattern reconfigurable antenna based on common mode and differential mode theory according to the present invention, where (a) is a front structure and (b) is a back structure.
Fig. 3 is a diagram of return loss simulation results of a pattern reconfigurable antenna based on common mode and differential mode theory in an embodiment of the present invention.
Fig. 4 is a diagram of simulation results of current distribution of radiation patches and a 3D pattern in each state at a center frequency point of a reconfigurable antenna based on common mode and differential mode theory in an embodiment of the present invention.
Fig. 5 is a diagram of simulation results of actual gains of peaks in various states in an operating band of a reconfigurable antenna based on common-mode and differential-mode theory in an embodiment of the present invention.
Fig. 6 is a diagram of simulation results of radiation efficiency in each state in an operating band of a reconfigurable antenna based on common mode and differential mode theory in an embodiment of the present invention.
Fig. 7 is a diagram of simulation results of planar patterns in various states at a center frequency point of a reconfigurable antenna based on common mode and differential mode theory in an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the following examples and drawings in order to make the objects, technical solutions and advantages of the present invention more apparent.
Example 1
The present embodiment provides a pattern reconfigurable antenna based on common mode and differential mode theory, whose structure is shown in fig. 1, including: the upper layer dielectric substrate 1, the lower layer dielectric substrate 2, the nylon support column 3, the first coaxial cable 4 and the second coaxial cable 5 are arranged above the lower layer dielectric substrate through the nylon support column, and an air interlayer is formed between the upper layer dielectric substrate and the lower layer dielectric substrate; wherein:
the lower dielectric substrate 2 is a single-layer plate (single-sided metal-coated layer), and the lower surface of the lower dielectric substrate is printed with an all-metal land 11;
the upper dielectric substrate 1 is a double-layer board (double-sided metal-clad layer), and the metal pattern printed on the upper surface thereof includes: the rectangular radiating patch 6, the central disk 7 and the stub 8, and the metal pattern printed on the lower surface thereof includes: left side L-shaped branch 9 and right side L-shaped branch 10; the center of the rectangular radiation patch is provided with a circular groove, and the center disc is positioned at the center of the circular groove and is ensured to be separated from the rectangular radiation patch; the left L-shaped branch 9 and the right L-shaped branch 10 are symmetrically arranged about the central line of the lower surface of the upper medium substrate, the short branch points to the central line, the long branch is parallel to the wide side of the rectangular radiation patch, the tail end of the short branch of the right L-shaped branch is provided with a circular metal connecting sheet, the left L-shaped branch is connected with a stub 8 through a short circuit metal column, and the left L-shaped branch and the right L-shaped branch are respectively connected with a metal ground 11 through a short circuit metal column;
the first coaxial cable 4 and the second coaxial cable 5 are positioned between the upper medium substrate 1 and the lower medium substrate 2; the inner conductor of the first coaxial cable 4 is connected with the stub 8 on the upper surface of the upper dielectric substrate, and is connected with the left L-shaped branch 9 on the lower surface of the upper dielectric substrate through the stub 8, and the outer conductor of the first coaxial cable 4 is connected with the right L-shaped branch 10 on the lower surface of the upper dielectric substrate through the annular metal connecting sheet and is grounded (connected with the metal ground 11).
In the above-mentioned pattern reconfigurable antenna, the first coaxial cable 4, the stub 8, the left L-shaped branch 9 and the right L-shaped branch 10 together form a first coupling feed structure, and perform coupling feed to the radiation patch 6; the inner conductor of the second coaxial cable 5 is connected with the central disc 7 on the upper surface of the upper medium substrate, the outer conductor is connected with the all-metal ground 11, and the coaxial cable 5 is connected with the central disc 7 to form a second coupling feed structure to carry out coupling feed on the radiation patch 6;
when the first coupling feed structure and the second coupling feed structure are fed separately, two different radiation patterns, namely a forward radiation pattern and a conical pattern, are generated; the specific principle is as follows: when the first coupling feed structure is fed independently, the left current direction and the right current direction on the antenna radiation patch are consistent, and the antenna radiation patch can be equivalently horizontally placed as a dipole, and a horizontal polarization forward radiation pattern is generated due to the existence of metal ground; similarly, when the second coupling feed structure is fed independently, the left current and the right current on the antenna radiation patch are opposite in direction, and the antenna radiation patch can be equivalently vertically placed as a monopole, and a vertical polarization cone pattern is generated due to the existence of metal ground; the polarization modes of the forward radiation pattern and the conical pattern are orthogonal, so that the first coupling feed structure and the second coupling feed structure have high isolation, and the passband is higher than 28.5dB;
when the first coupling feed structure and the second coupling feed structure are fed simultaneously, an oblique pattern is generated; the specific principle is as follows: when the first coupling feed structure and the second coupling feed structure are simultaneously fed in the same phase (common mode feed), the left current direction on the antenna radiation patch is consistent and enhanced, the right current direction is opposite and counteracted, the antenna radiation patch can be equivalently used as a radiator on the left side, and the reflector on the right side, so that a left oblique direction diagram is generated; similarly, when the first coupling feed structure and the second coupling feed structure are simultaneously subjected to equal-amplitude reverse feed (differential mode feed), the right current direction on the antenna radiation patch is consistent and enhanced, the left current direction is opposite and counteracted, the antenna radiation patch can be equivalently used as a radiator on the right side, and the reflector on the left side, so that a rightward inclined directional diagram is generated.
It should be noted that: the short circuit metal columns respectively connected between the left L-shaped branch 9 and the metal ground 11 and between the right L-shaped branch 10 and the metal ground 11 are used for realizing port impedance matching of the first coupling feed structure, and the positions of connection points on the left L-shaped branch 9 and the right L-shaped branch 10 can be optimally adjusted according to the port impedance matching condition; in this embodiment, in order to fix the short-circuit metal pillar, the short-circuit metal pillar is disposed through the upper dielectric substrate 1 and flush with the upper surface of the upper dielectric substrate.
Further, the overall dimensions of the pattern reconfigurable antenna based on the common mode and differential mode theory in the present embodiment are 40mm×20mm×10mm (0.46 λ) 0 ×0.23λ 0 ×0.11λ 0 ) The method comprises the steps of carrying out a first treatment on the surface of the The model of the dielectric substrate is F4BM, the thickness of the dielectric substrate is 0.787mm, the dielectric constant is 4.4, and the loss tangent is 0.0025; the length and the width of the rectangular radiation patch are 30mm and 15mm respectively, and the radius of the central circular groove is 2.4mm; the radius of the central disc is 1.4mm; the widths of the L-shaped branches and the short stubs are 1.5mm, the length of the short stubs is 3mm, and the total length of the L-shaped branches is 8.4mm; the radii of the short-circuit metal column and the nylon column are 0.5mm and 1mm.
The above dimensions are all specific dimensions calculated and optimized in this embodiment, and are used to exemplarily illustrate the beneficial effects of the present invention, and a simulation test is performed on the reconfigurable antenna of the directivity diagram in this embodiment.
As shown in fig. 3, which shows a simulation result diagram of the return loss of the antenna in the embodiment, it can be seen from the diagram that the return loss of the antenna is less than-10 dB in the range of 3.32GHz-3.7GHz in four radiation states, the impedance bandwidth exceeds 10%, the bandwidth is wider, the isolation of the dual ports is higher than 28.5dB in the whole passband, and the antenna has the characteristic of high isolation, and is suitable for various scenes, such as internet of things (IoT), unmanned aerial vehicle communication, vehicle-mounted communication, base stations and the like.
As shown in fig. 4, in the simulation result graphs of the current distribution of the radiation patch and the 3D directional diagram of the antenna under different states at the center frequency point of the antenna, it can be seen from the graph that at the center frequency point f=3.5 GHz, the rectangular radiation patch is divided into left and right parts by dashadline, when only the first coupling feed structure is fed, the current distribution of the left and right parts is in phase, and the antenna works in the forward radiation directional diagram; when only feeding the second coupling feed structure, the current distribution of the left and right parts is reversed, and the antenna works in a conical direction diagram; when the coupling structure is subjected to common mode feed, the current distribution of the left part is in phase, the current distribution of the right part is in opposite phase, and the antenna works in a left inclined direction diagram; when the differential mode feed is performed to the coupling structure, the current distribution of the right part is in phase, the current distribution of the left part is in opposite phase, and the antenna works in a rightward inclined pattern.
As shown in fig. 5, which is a graph of actual simulation results of peak gains in each state in the operating frequency band of the antenna in this embodiment, it can be seen from the graph that, at the center frequency point f=3.5 GHz, the maximum actual gains of the antenna in the four states are 7.8dBi, 4.98dBi, 7.45dBi and 7.44dBi, respectively.
As shown in fig. 6, which is a graph of simulation results of radiation efficiency in each state in the operating frequency band of the antenna in this embodiment, it can be seen from the graph that the maximum radiation efficiency of the antenna exceeds 88.3% at the center frequency point f=3.5 GHz.
As shown in FIG. 7, which is a graph of simulation results of a planar directional diagram of the antenna in each state at the center frequency point of the antenna in the embodiment, it can be seen from the graph that in different states, the cross polarization of the antenna is better than-14.5 dB, and the polarization purity is high; wherein the beam of the cone pattern is directed at + -48 deg., and the beam of the left (right) oblique pattern is directed at-30 deg. (30 deg.).
Therefore, the antenna pattern can be switched among four states of a forward radiation pattern, a conical pattern, a left inclined pattern and a right inclined pattern, and the antenna has the advantages of simple implementation, compact structure, lower cost and higher gain and efficiency.
While the invention has been described in terms of specific embodiments, any feature disclosed in this specification may be replaced by alternative features serving the equivalent or similar purpose, unless expressly stated otherwise; all of the features disclosed, or all of the steps in a method or process, except for mutually exclusive features and/or steps, may be combined in any manner.

Claims (4)

1. A pattern reconfigurable antenna based on common mode and differential mode theory, comprising: the device comprises an upper layer medium substrate (1), a lower layer medium substrate (2), nylon support columns (3), a first coaxial cable (4) and a second coaxial cable (5), wherein the upper layer medium substrate is arranged above the lower layer medium substrate through the nylon support columns, and an air interlayer is formed between the upper layer medium substrate and the lower layer medium substrate; the method is characterized in that:
the lower surface of the lower dielectric substrate (2) is provided with a metal ground (11);
the upper surface of the upper medium substrate (1) is provided with a rectangular radiation patch (6), a central disc (7) and a stub (8), and the lower surface of the upper medium substrate (1) is provided with a left L-shaped branch (9) and a right L-shaped branch (10); the center of the rectangular radiation patch is provided with a circular groove, and the center disc is positioned at the center of the circular groove; the left L-shaped branch and the right L-shaped branch are symmetrically arranged about the central line of the lower surface of the upper medium substrate, the tail end of the short branch of the right L-shaped branch is provided with a circular metal connecting sheet, the left L-shaped branch is connected with a short-circuit metal column to form a short-circuit line, and the left L-shaped branch and the right L-shaped branch are respectively connected with a metal ground through the short-circuit metal column;
the inner conductor of the first coaxial cable (4) is connected with the stub and the left L-shaped branch through the stub, and the outer conductor of the first coaxial cable (4) is connected with the right L-shaped branch (10) through the annular metal connecting sheet and is connected with the metal ground; the inner conductor of the second coaxial cable (5) is connected with the central disc (7) and the outer conductor is connected with the metal ground.
2. The reconfigurable antenna of claim 1, wherein the first coaxial cable, the stub, the left side L-branch and the right side L-branch together form a first coupling feed structure and couple feed the rectangular radiating patch; the coaxial cable and the central disk form a second coupling feed structure for coupling feed to the rectangular radiating patch.
3. The reconfigurable antenna of claim 2, wherein the antenna produces a forward radiation pattern when the first coupling feed structure is fed alone, a tapered pattern when the second coupling feed structure is fed alone, a left tilt pattern when the first coupling feed structure and the second coupling feed structure are fed in-phase (common mode feed) with equal amplitude, and a right tilt pattern when the first coupling feed structure and the second coupling feed structure are fed in opposite phase (differential mode feed) with equal amplitude.
4. The pattern reconfigurable antenna of claim 1, wherein the radiation size of the pattern reconfigurable antenna is 0.46 λ 0 ×0.23λ 0 ×0.11λ 0 ，λ 0 Is the working wavelength at the central frequency point of the antenna.
CN202310255332.3A 2023-03-16 2023-03-16 Directional diagram reconfigurable antenna based on common mode and differential mode theory Pending CN116315635A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117578099A (en) * 2023-12-07 2024-02-20 电子科技大学 Large-angle directional diagram reconfigurable antenna with high stable gain

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117578099A (en) * 2023-12-07 2024-02-20 电子科技大学 Large-angle directional diagram reconfigurable antenna with high stable gain
CN117578099B (en) * 2023-12-07 2024-06-11 电子科技大学 Large-angle directional diagram reconfigurable antenna with high stable gain

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