CN115207621A - Artificial surface plasmon high-aperture efficiency end-fire antenna - Google Patents
Artificial surface plasmon high-aperture efficiency end-fire antenna Download PDFInfo
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- CN115207621A CN115207621A CN202210929670.6A CN202210929670A CN115207621A CN 115207621 A CN115207621 A CN 115207621A CN 202210929670 A CN202210929670 A CN 202210929670A CN 115207621 A CN115207621 A CN 115207621A
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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
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- H01Q1/48—Earthing means; Earth screens; Counterpoises
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
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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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Abstract
The invention provides an artificial surface plasmon high-caliber efficiency end-fire antenna which comprises a dielectric substrate, wherein the upper surface and the lower surface of the dielectric substrate are respectively provided with a dielectric substrate top layer and a dielectric substrate bottom layer, the dielectric substrate bottom layer is provided with a grounding metal layer, the dielectric substrate top layer is provided with a top surface metal layer, the top surface metal layer is provided with a balun structure, gradient parallel double lines, transition parallel double lines and an artificial surface plasmon radiation strip, one end of the balun structure is a feed port, the other end of the balun structure is connected with the end part of the transition parallel double lines through connecting the gradient parallel double lines, and the other end part of the transition parallel double lines is connected with the artificial surface plasmon radiation strips which are arranged in pairs; the artificial surface plasmon high-aperture-efficiency end-fire antenna has the advantages of high aperture efficiency, low profile, wide working bandwidth, high directionality, high gain, small overall size and the like.
Description
Technical Field
The invention relates to an artificial surface plasmon high-caliber efficiency end-fire antenna, and belongs to the technical field of antennas.
Background
The artificial surface plasmon is a surface wave with dispersion characteristics excited on a periodic metal surface, and has strong field binding property. Microwave devices designed by using this mode have characteristics of low transmission loss, easy common mode, and the like, and thus have been widely studied. In recent years, there has been much interest in end-fire antennas based on artificial surface plasmons.
However, the existing end-fire antenna based on artificial surface plasmons still has the following problems: 1) The end-fire realization mode still depends on resonant radiators such as dipole arrays and the like, which can cause the designed antenna to have larger transverse size and larger occupied space, so that the aperture efficiency of the antenna is lower; 2) There is a problem of narrow operating bandwidth due to the design using the resonant type radiator.
For example, chinese patent application CN202111621835.5 discloses a broadband high-gain planar endfire antenna based on artificial surface plasmons. In the patent, a plurality of I-type resonators are adopted in a transition part, and a gradually-changed opening structure is adopted in a radiation part, so that transverse and longitudinal electrical sizes of the antenna are overlarge, and the caliber efficiency is too low.
In addition, the existing end-fire antenna depending on artificial surface plasmon radiation adopts an asymmetric structure, so that the maximum radiation direction of the antenna deviates the end-fire direction, the directivity of the antenna is poor, and the actual antenna assembly is troublesome. Meanwhile, a resonant type radiator is employed or an asymmetric artificial surface plasmon structure is used, which complicates the design of the antenna.
The above-mentioned problems are problems that should be considered and solved in the design and production process of the endfire antenna.
Disclosure of Invention
The invention aims to provide an artificial surface plasmon high-aperture efficiency end-fire antenna which has the characteristics of high aperture efficiency, low profile, wide working bandwidth, good directivity in the end-fire direction and the like, and solves the problems of low aperture efficiency, high profile, narrow working bandwidth, large size, radiation direction deviation and complex design in the prior art.
The technical solution of the invention is as follows:
the utility model provides an artifical surface plasmon high-bore efficiency endfire antenna, including the dielectric substrate, the upper and lower two sides of dielectric substrate form dielectric substrate top layer and dielectric substrate bottom respectively, dielectric substrate bottom is equipped with the ground metal layer, dielectric substrate top layer is equipped with the top surface metal layer, the top surface metal layer is equipped with balun structure, gradual change parallel double-line, parallel double-line of transition and artifical surface plasmon radiation strip, one end of balun structure is the feed port, the other end of balun structure is through connecting the end of the parallel double-line of transition, another end connection of the parallel double-line of transition is the artifical surface plasmon radiation strip that sets up in pairs, artifical surface plasmon radiation strip forms the clearance and the axial symmetry sets up between the strip, balun structure and ground metal layer correspond to locate the upper and lower two sides of dielectric substrate, through the transition structure that the parallel double-line of gradual change and the parallel double-line of transition constitute, to artifical surface plasmon radiation strip both sides current in-phase feed.
Furthermore, the balun structure comprises a first microstrip line, a double microstrip line and a parallel double line, the double microstrip line comprises a second microstrip line and a third microstrip line, the second microstrip line and the third microstrip line are respectively bent into a U shape, the total length of the second microstrip line and the third microstrip line differs by half of the wavelength, one end of the first microstrip line is a feed port of the antenna, two sides of the other end of the first microstrip line are respectively connected with the second microstrip line and the third microstrip line, and the second microstrip line and the third microstrip line are connected with the gradient parallel double line.
Furthermore, the second microstrip line and the third microstrip line are respectively U-shaped microstrip lines with opposite bending directions.
Further, artifical surface plasmon radiation strip includes artifical surface plasmon changeover portion, periodic rectangle pastes fragment, artifical surface plasmon transition portion and paster, and the one end of periodic rectangle pastes the fragment passes through artifical surface plasmon changeover portion and connects the parallel double-line of gradual change, and artifical surface plasmon transition portion is connected to the other end of periodic rectangle pastes the fragment, and the paster is equidistant to be located the outside of artifical surface plasmon radiation strip.
Further, gaps are arranged on the inner sides of the artificial surface plasmon radiation stripes and are arranged in parallel.
Further, the paster includes first periodic paster, rectangle paster and second periodic paster, and the top of first periodic paster is equipped with first inclined plane, and the outside of artifical surface plasmon changeover portion is located to the bottom of first periodic paster, and the outside of periodic rectangle paster section is located to the rectangle paster, and the height of rectangle paster is the same, and the top of second periodic paster is equipped with the second inclined plane, and the outside of artifical surface plasmon transition section is located to the bottom of second periodic paster.
Further, the height of the first periodic patch gradually increases from the far periodic rectangular patch segment end to the near periodic rectangular patch segment end, and the height of the second periodic patch gradually decreases from the far periodic rectangular patch segment end to the near periodic rectangular patch segment end.
Further, through adjusting the height of the rectangular patch on the artificial surface plasmon radiation strip, the regulation and control of the dispersion curve of the artificial surface plasmon radiation strip are realized, so that the regulation of the working frequency and the bandwidth of the antenna are realized: when the height of the rectangular patch is increased, the working frequency of the antenna is reduced, and the working bandwidth is narrowed; when the height of the rectangular patch is lowered, the operating frequency of the antenna is raised and the operating bandwidth is widened.
Further, through adjusting the rectangle paster number on the artifical surface plasmon radiation strip, realize the regulation and control to the length of artifical surface plasmon radiation strip to the regulation and control to this antenna gain and beam width is realized: when the number of the rectangular patches is increased, the gain of the antenna is increased, and the beam width is narrowed; when the number of rectangular patches is reduced, the gain of the antenna is reduced and the beam width is widened.
Furthermore, the regulation and control of the working frequency of the antenna are realized by adjusting the total length of the second microstrip line and the third microstrip line in the balun structure: when the total length difference value of the second microstrip line and the third microstrip line in the balun structure is increased, the working frequency of the antenna is reduced, and conversely, when the total length difference value is reduced, the working frequency of the antenna is increased.
The technical solution of the invention is as follows:
the invention has the beneficial effects that:
1. the artificial surface plasmon high-aperture-efficiency end-fire antenna has the advantages of high aperture efficiency, low profile, wide working bandwidth, high directionality, high gain, small overall size, simple structure and easiness in processing; the problems that an existing end-fire antenna based on artificial surface plasmons is low in caliber efficiency, high in section, narrow in bandwidth, offset in radiation direction, large in transverse size, complex in design and the like are solved, and the antenna can be applied to millimeter wave frequency bands.
2. According to the artificial surface plasmon high-aperture efficiency end-fire antenna, the artificial surface plasmon radiation strips which are symmetrically arranged up and down form a dipole array through the opposite current realized by the balun structure, so that the end-fire radiation of the antenna is realized. Meanwhile, the artificial surface plasmon radiation strip is used as a radiation source of the antenna, so that the overall size of the antenna is reduced, the occupied area of metal is reduced, the small caliber of the antenna is realized, the high gain is realized while the caliber of the antenna is reduced, and the high caliber efficiency is realized.
3. According to the artificial surface plasmon high-caliber efficiency end-fire antenna, the impedance matching of the antenna is realized through the transition of the current of the balun structure through the gradual change parallel double lines, the transition parallel double lines and the artificial surface plasmon transition section, so that the wider bandwidth is realized.
4. The invention adopts the balun structure to feed a pair of completely symmetrical artificial surface plasmon radiation strips, thereby avoiding the problem of directional diagram inclination caused by an asymmetric structure and realizing high-directivity radiation in the end-fire direction.
5. This kind of high bore efficiency end fire antenna of artificial surface plasmon through the gradual change of artificial surface plasmon transition, has realized the matching of electromagnetic wave to make the electromagnetic wave can radiate to the free space effectively, realized higher gain.
Drawings
Fig. 1 is a schematic structural diagram of an artificial surface plasmon high-aperture efficiency end-fire antenna according to an embodiment of the present invention;
fig. 2 is a schematic top surface structure diagram of an artificial surface plasmon high aperture efficiency end-fire antenna according to an embodiment.
Fig. 3 is a partially enlarged schematic view of a in fig. 2.
Fig. 4 is a partially enlarged schematic view of B in fig. 2.
Fig. 5 is a partially enlarged schematic view of C in fig. 2.
Fig. 6 is a partially enlarged schematic view of D in fig. 2.
Fig. 7 is a schematic bottom structure diagram of an artificial surface plasmon high aperture efficiency end-fire antenna according to an embodiment.
Fig. 8 is a schematic diagram of simulation and actual measurement S parameters of the artificial surface plasmon high-aperture-efficiency end-fire antenna according to the embodiment.
Fig. 9 is a schematic diagram of a 9G directional diagram of an artificial surface plasmon high aperture efficiency end-fire antenna according to an embodiment, where fig. 9 (a) is a diagram of simulated and measured coplanar polarization and cross polarization of the E-plane, and fig. 9 (b) is a diagram of simulated and measured coplanar polarization and cross polarization of the H-plane.
Fig. 10 is a 10G directional diagram of an artificial surface plasmon high aperture efficiency end-fire antenna according to an embodiment, where fig. 10 (a) is a simulated and measured coplanar polarization and cross polarization diagram of an E-plane, and fig. 10 (b) is a simulated and measured coplanar polarization and cross polarization diagram of an H-plane.
FIG. 11 is a schematic view of an 11G pattern of an artificial surface plasmon high aperture efficiency end-fire antenna according to an embodiment; fig. 11 (a) is a simulated and measured coplanar polarization and cross polarization diagram of the E-plane, and fig. 11 (b) is a simulated and measured coplanar polarization and cross polarization diagram of the H-plane.
FIG. 12 is a schematic diagram of simulated and actually measured gain and efficiency of an artificial surface plasmon high aperture efficiency end-fire antenna according to an embodiment.
Wherein: 11-top layer of dielectric substrate, 12-top metal layer, 13-balun structure, 14-gradient parallel double lines, 15-transition parallel double lines, 16-artificial surface plasmon radiation strip, and 17-gap;
131-a first microstrip line, 132-a second microstrip line, 133-a third microstrip line, 134-a parallel doublet line;
161-artificial surface plasmon transition section, 162-periodic rectangular patch section, 163-artificial surface plasmon transition section, 164-first periodic patch, 165-rectangular patch, 166-second periodic patch, 167-first slope, 168-second slope;
21-dielectric substrate bottom layer, 22-grounding metal layer.
Detailed Description
Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
Examples
An artificial surface plasmon high-aperture efficiency end-fire antenna, as shown in fig. 1, 2 and 7, comprises a dielectric substrate, wherein a top layer 11 and a bottom layer 21 of the dielectric substrate are respectively formed on the upper surface and the lower surface of the dielectric substrate, and a grounding metal layer 22 is arranged on the bottom layer 21 of the dielectric substrate.
As shown in fig. 1 and 2, a top surface metal layer 12 is disposed on a top surface 11 of a dielectric substrate, the top surface metal layer 12 is provided with a balun structure 13, a gradient parallel double line 14, a transition parallel double line 15 and an artificial surface plasmon radiation strip 16, one end of the balun structure 13 is a feed port, the other end of the balun structure 13 is connected with the end of the transition parallel double line 15 by connecting the gradient parallel double line 14, the other end of the transition parallel double line 15 is connected with the artificial surface plasmon radiation strips 16 which are arranged in pair, gaps 17 are formed between the artificial surface plasmon radiation strips 16 and are arranged in axial symmetry, the balun structure 13 and a ground metal layer 22 are correspondingly disposed on the upper and lower surfaces of the dielectric substrate, and current in-phase feeding is performed on the two sides of the artificial surface plasmon radiation strip 16 through the balun structure 13 and through the transition structure formed by the gradient double line parallel double line 14 and the transition parallel double line 15.
The artificial surface plasmon high-aperture-efficiency end-fire antenna has the advantages of high aperture efficiency, low profile, wide working bandwidth, high directionality, high gain, small overall size, simple structure and easiness in processing; the problems that an existing end-fire antenna based on artificial surface plasmons is high in profile, low in caliber efficiency, narrow in bandwidth, offset in radiation direction, large in transverse size, complex in design and the like are solved, and the antenna can be applied to millimeter wave frequency bands.
As shown in fig. 2 and fig. 3, the balun structure 13 includes a first microstrip line 131, a double microstrip line and a parallel double line 134, where the double microstrip line includes a second microstrip line 132 and a third microstrip line 133, the second microstrip line 132 and the third microstrip line 133 are respectively microstrip lines bent into a U shape and having lengths different by half a wavelength, one end of the first microstrip line 131 is a feed port of the antenna, two sides of the other end of the first microstrip line 131 are respectively connected to the second microstrip line 132 and the third microstrip line 133, and the second microstrip line 132 and the third microstrip line 133 are connected to the tapered parallel double line 14.
As shown in fig. 2, the artificial surface plasmon radiation stripes 16 symmetrically arranged up and down form a dipole array by the opposite current realized by the balun structure 13, thereby realizing the end-fire radiation of the antenna. Meanwhile, the artificial surface plasmon radiation strip 16 is used as a radiation source of the antenna, so that the overall size of the antenna is reduced, the occupied area of metal is reduced, the small caliber of the antenna is realized, and the high caliber efficiency is realized.
As shown in fig. 1 and fig. 2, the feeding portion adopts a balun structure 13 with a 180 ° phase shift, in the balun structure 13, a first microstrip line 131 is connected to a parallel double line 134 through two high-impedance second microstrip lines 132 and a third microstrip line 133, the second microstrip line 132 and the third microstrip line 133 are formed by a bent microstrip line with a U-shaped structure, and the lengths of the second microstrip line 132 and the third microstrip line 133 are different by half a wavelength. The feed of the front end of the first microstrip line 131 forms two currents with 180-degree phase difference at the tail end of the parallel double line 134 after passing through the double microstrip line, and then passes through the gradual change parallel double line 14 and the transition parallel double line 15 to be transited to the artificial surface plasmon radiation strip 16, so as to achieve end-fire direction radiation.
As shown in fig. 2 and 3, the second microstrip line 132 and the third microstrip line 133 are U-shaped microstrip lines with opposite bending directions, so that the coupling between the two microstrip lines caused by the bending in the same direction can be avoided. The first microstrip line 131 is preferably a 50ohm microstrip line.
As shown in fig. 1 and 7, the gradual change parallel double lines 14 and the transition parallel double lines 15 are arranged, so that the structure is simple, the electrical size is small, and the processing is easy. The dielectric substrate bottom layer 21 is provided with a ground metal layer 22 having a length corresponding to the balun structure 13.
As shown in fig. 1 and 2, the artificial surface plasmon radiation stripe 16 includes an artificial surface plasmon transition section 161, a periodic rectangular patch section 162, an artificial surface plasmon transition section 163 and a patch, one end of the periodic rectangular patch section 162 is connected to the gradient parallel double line 14 through the artificial surface plasmon transition section 161, the other end of the periodic rectangular patch section 162 is connected to the artificial surface plasmon transition section 163, and the patch is equidistantly disposed outside the artificial surface plasmon radiation stripe 16.
As shown in fig. 2, the artificial surface plasmon radiation stripes 16 are provided with gaps 17 on the inner sides thereof and arranged in parallel to each other. Through setting up two artifical surface plasmon radiation strips 16 that are parallel completely, and the clearance 17 between two artifical surface plasmon radiation strips 16 is an equal width clearance, can realize that antenna lateral dimension is little, high bore efficiency, avoids increasing the lateral dimension of antenna, reduces the problem that bore efficiency and processing are complicated.
As shown in fig. 2, 4, 5 and 6, the patches include a first periodic patch 164, a rectangular patch 165 and a second periodic patch 166, a first inclined plane 167 is disposed at a top end of the first periodic patch 164, a bottom end of the first periodic patch 164 is disposed at an outer side of the artificial surface plasmon transition section 161, the rectangular patch 165 is disposed at an outer side of the periodic rectangular patch section 162, heights of the rectangular patches 165 are the same, a second inclined plane 168 is disposed at a top end of the second periodic patch, and a bottom end of the second periodic patch 166 is disposed at an outer side of the artificial surface plasmon transition section 163. The first inclined plane 167 can better realize the transition from the parallel double lines 15 to the artificial surface plasmon radiation strips 16, and the second inclined plane 168 realizes the phase matching between the antenna and the free space through the artificial surface plasmons with gradually reduced height, so that the electromagnetic waves are better radiated into the free space.
As shown in fig. 2, 4 and 6, the height of the first periodic patch 164 gradually increases from the end of the distal periodic rectangular patch segment 162 to the end of the proximal periodic rectangular patch segment 162. The height of the second periodic patches 166 decreases from the distal periodic rectangular patch segment 162 end to the proximal periodic rectangular patch segment 162 end. The first periodic patch 164 can better realize the transition from the parallel double lines 15 to the artificial surface plasmon radiation strip 16 without additionally arranging an I-type resonator, and meanwhile, the adoption of a shorter length ratio can be realized, and the overall size of the antenna is reduced; the second periodic patch 166 achieves phase matching of the antenna with free space through artificial surface plasmons whose heights are gradually reduced, so that electromagnetic waves are better radiated into free space.
As in fig. 1 and 2, the artificial surface plasmon radiation strip 16 is used for radiation and a traveling wave mode is transmitted, which enables the antenna to have a wide operating bandwidth. The impedance matching of the antenna is realized through the transition of the current of the balun structure 13 through the gradient parallel double lines 14, the transition parallel double lines 15 and the artificial surface plasmon transition section 161, so that a wider bandwidth can be further realized; the matching of the electromagnetic wave is realized by the gradual change of the artificial surface plasmon transition section 163, so that the electromagnetic wave can be effectively radiated into a free space, and a higher gain is realized.
In the embodiment, the height of the rectangular patch 165 on the artificial surface plasmon radiation strip 16 is adjusted to regulate and control the dispersion curve of the artificial surface plasmon radiation strip 16, so that the working frequency and the bandwidth of the antenna are regulated: as the height of the rectangular patch 165 increases, the operating frequency of the antenna decreases and the operating bandwidth narrows; as the height of the rectangular patch 165 is lowered, the operating frequency of the antenna increases and the operating bandwidth widens.
In the embodiment, the length of the artificial surface plasmon radiation strip 16 is regulated and controlled by adjusting the number of rectangular patches 165 on the artificial surface plasmon radiation strip 16, so that the regulation and control of the antenna gain and the beam width are realized: when the number of the rectangular patches 165 is increased, the gain of the antenna is increased, and the beam width is narrowed; when the number of the rectangular patches 165 is reduced, the gain of the antenna is reduced and the beam width is widened.
The artificial surface plasmon high-aperture efficiency end-fire antenna realizes the regulation and control of the working frequency of the antenna by adjusting the lengths of the second microstrip line 132 and the third microstrip line 133 in the balun structure 13. When the total length difference between the second microstrip line 132 and the third microstrip line 133 in the balun structure 13 increases, the antenna operating frequency becomes smaller, and conversely, when the total length difference decreases, the antenna operating frequency becomes larger.
The artificial surface plasmon high-caliber efficiency end-fire antenna is obviously different from the conventional artificial surface plasmon end-fire antenna. Structurally: the existing artificial surface plasmon end-fire antenna generally adopts an asymmetric structure or uses a resonance type radiator, and the artificial surface plasmon end-fire antenna of the embodiment adopts a completely symmetric structure; in principle: the artificial surface plasmon cannot radiate energy efficiently to a free space because of its strong field binding property, and in order to realize radiation of the artificial surface plasmon to a free space, it is necessary to destroy the field distribution. The existing artificial surface plasmon end-fire antenna uses an artificial surface plasmon transmission line as the feed of the antenna, radiates by coupling the energy on the artificial surface plasmon transmission line to the radiator, or excites a differential electric field on the artificial surface plasmon radiation strip 16 by this artificial surface plasmon end-fire antenna adopting an asymmetric structure. According to the artificial surface plasmon endfire antenna, the balun structure 13 is adopted to feed dipole type artificial surface plasmons, and therefore effective energy radiation is achieved.
The artificial surface plasmon high-caliber efficiency end-fire antenna adopts the thin dielectric substrate with a single-layer metal structure to realize a low profile, and the adopted symmetrical structure ensures that end-fire beams formed by the antenna are not inclined. Finally, the antenna has the characteristics of low section, wide working bandwidth, high aperture efficiency, good end-fire directional directivity, small size and the like, and can be applied to the microwave field.
The simulation and actual measurement verification results of the embodiment are as follows:
FIG. 8 is a graph of S parameters of an artificial surface plasmon high aperture efficiency end-fire antenna of an embodiment, the antenna has an operating bandwidth of 9-11GHz, a relative bandwidth of 20% and a wider operating bandwidth.
Fig. 9, 10 and 11 are respectively the 9GHz, 10GHz and 11GHz directional patterns of the artificial surface plasmon high aperture efficiency endfire antenna of the embodiment, and it can be seen from the directional patterns that the beam is not inclined in the endfire direction and has excellent endfire performance.
Fig. 12 shows gains and radiation efficiencies obtained by taking points every 0.1GHz in the 9-11GHz band of the artificial surface plasmon high aperture efficiency endfire antenna of the embodiment, where the antenna has the highest gain of 13.3dBi, has an average radiation efficiency of 98%, and has high gains and high radiation efficiencies.
The above description is only a preferred embodiment of the present invention, and the scope of the present invention is not limited to the above embodiments, and all technical solutions that belong to the idea of the present invention belong to the scope of the present invention. It should be noted that modifications and adaptations to those skilled in the art without departing from the principles of the present invention should also be considered as within the scope of the present invention.
Claims (10)
1. The utility model provides an artificial surface plasmon high-aperture efficiency end-fire antenna, includes the dielectric substrate, the upper and lower two sides of dielectric substrate form dielectric substrate top layer and dielectric substrate bottom respectively, and the dielectric substrate bottom is equipped with ground metal layer, its characterized in that: the top surface metal layer is provided with a balun structure, gradient parallel double lines, transition parallel double lines and artificial surface plasmon radiation strips, one end of the balun structure is a feed port, the other end of the balun structure is connected with the end portions of the transition parallel double lines through the connection of the gradient parallel double lines, the other end portions of the transition parallel double lines are connected with the artificial surface plasmon radiation strips which are arranged in pairs, gaps are formed among the artificial surface plasmon radiation strips and are arranged in an axisymmetric mode, the balun structure and the grounding metal layer are correspondingly arranged on the upper surface and the lower surface of the dielectric substrate, and current on two sides of the artificial surface plasmon radiation strips is fed in phase through the balun structure and through the transition structure formed by the gradient parallel double lines and the transition parallel double lines.
2. The artificial surface plasmon high aperture efficiency end-fire antenna of claim 1, wherein: the balun structure comprises a first microstrip line, a double microstrip line and a parallel double line, wherein the double microstrip line comprises a second microstrip line and a third microstrip line, the second microstrip line and the third microstrip line are respectively bent into a U shape, the total length of the microstrip lines differs by half of wavelength, one end of the first microstrip line is a feed port of an antenna, two sides of the other end of the first microstrip line are respectively connected with the second microstrip line and the third microstrip line, and the second microstrip line and the third microstrip line are connected with the gradual change parallel double line.
3. The artificial surface plasmon high aperture efficiency end-fire antenna of claim 2, wherein: the second microstrip line and the third microstrip line are respectively U-shaped microstrip lines with opposite bending directions.
4. The artificial surface plasmon high aperture efficiency end-fire antenna of any of claims 1-3, wherein: artifical surface plasmon radiation strip includes artifical surface plasmon changeover portion, periodic rectangle pastes fragment, artifical surface plasmon transition section and a plurality of paster, and the one end of periodic rectangle pastes the fragment connects the parallel double-line of gradual change through artifical surface plasmon changeover portion, and artifical surface plasmon transition section is connected to the other end of periodic rectangle pastes the fragment, and the paster is equidistant to be located the outside of artifical surface plasmon radiation strip.
5. The artificial surface plasmon high aperture efficiency end-fire antenna of claim 4, wherein: the inside of artifical surface plasmon radiation strip is equipped with the clearance and mutual parallel arrangement.
6. The artificial surface plasmon high aperture efficiency end-fire antenna of claim 4, characterized by: the paster includes first periodic paster, rectangle paster and second periodic paster, and the top of first periodic paster is equipped with first inclined plane, and the outside of artifical surface plasmon changeover portion is located to the bottom of first periodic paster, and the outside of periodic rectangle paster section is located to the rectangle paster, and the height of rectangle paster is the same, and the top of second periodic paster is equipped with the second inclined plane, and the outside of artifical surface plasmon transition section is located to the bottom of second periodic paster.
7. The artificial surface plasmon high aperture efficiency end-fire antenna of claim 6, wherein: the height of the first periodic patch gradually increases from the far periodic rectangular patch segment end to the near periodic rectangular patch segment end, and the height of the second periodic patch gradually decreases from the far periodic rectangular patch segment end to the near periodic rectangular patch segment end.
8. The artificial surface plasmon high aperture efficiency end-fire antenna of claim 6 or 7, characterized by: through the rectangle paster height on the adjustment artifical surface plasmon radiation strip, realize the regulation and control to the dispersion curve of artifical surface plasmon radiation strip to the realization is to the regulation of antenna operating frequency and bandwidth: when the height of the rectangular patch is increased, the working frequency of the antenna is reduced, and the working bandwidth is narrowed; when the height of the rectangular patch is lowered, the operating frequency of the antenna is raised and the operating bandwidth is widened.
9. The artificial surface plasmon high aperture efficiency end-fire antenna of claim 6 or 7, wherein: through adjusting the rectangle paster number on the artifical surface plasmon radiation strip, realize the regulation and control to the length of artifical surface plasmon radiation strip to the realization is to the regulation and control of this antenna gain and beam width: when the number of the rectangular patches is increased, the gain of the antenna is improved, and the beam width is narrowed; when the number of rectangular patches is reduced, the gain of the antenna is reduced and the beam width is widened.
10. The artificial surface plasmon high aperture efficiency end-fire antenna of any of claims 1-3, wherein: the total length of a second microstrip line and a third microstrip line in the balun structure is adjusted to realize the regulation and control of the working frequency of the antenna: when the total length difference value of the second microstrip line and the third microstrip line in the balun structure is increased, the working frequency of the antenna is reduced, and conversely, when the total length difference value is reduced, the working frequency of the antenna is increased.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115548615A (en) * | 2022-11-22 | 2022-12-30 | 东南大学 | Artificial surface plasmon on-chip dual-mode transmission line based on balun |
| CN115764294A (en) * | 2022-12-21 | 2023-03-07 | 中国矿业大学 | Full-angle high-speed beam scanning antenna based on artificial surface plasmons |
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- 2022-08-03 CN CN202210929670.6A patent/CN115207621A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115548615A (en) * | 2022-11-22 | 2022-12-30 | 东南大学 | Artificial surface plasmon on-chip dual-mode transmission line based on balun |
| CN115548615B (en) * | 2022-11-22 | 2023-02-03 | 东南大学 | Artificial surface plasmon on-chip dual-mode transmission line based on balun |
| WO2024108858A1 (en) * | 2022-11-22 | 2024-05-30 | 东南大学 | Balun-based spoof surface plasmon on-chip dual-mode transmission line |
| CN115764294A (en) * | 2022-12-21 | 2023-03-07 | 中国矿业大学 | Full-angle high-speed beam scanning antenna based on artificial surface plasmons |
| CN115764294B (en) * | 2022-12-21 | 2023-11-21 | 中国矿业大学 | Full-angle high-speed wave beam scanning antenna based on artificial surface plasmon |
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