CN113555678A - Solar cell circularly polarized transparent satellite antenna based on transparent conductive film - Google Patents
Solar cell circularly polarized transparent satellite antenna based on transparent conductive film Download PDFInfo
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- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 4
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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
-
- 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
- H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
- H01Q13/08—Radiating ends of two-conductor microwave transmission lines, e.g. of coaxial lines, of microstrip lines
-
- 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
- H01Q15/14—Reflecting surfaces; Equivalent structures
-
- 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
- H01Q15/24—Polarising devices; Polarisation filters
- H01Q15/242—Polarisation converters
- H01Q15/244—Polarisation converters converting a linear polarised wave into a circular polarised wave
-
- 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
- H01Q9/0407—Substantially flat resonant element parallel to ground plane, e.g. patch antenna
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Abstract
The invention provides a solar cell circularly polarized transparent defending antenna based on a transparent conductive film, which comprises the following components from top to bottom: the device comprises an upper micro-strip radiation patch, an upper dielectric substrate, an air layer, a micro-strip line feed network, a lower micro-strip radiation patch, a lower dielectric substrate, a ground reflection patch and a solar cell; the upper and lower layers of microstrip radiation patches are formed into an array by four square patches with the same size, and the center positions of the upper and lower layers of patches are the same; the size of the radiation patch on the upper dielectric substrate is slightly larger than that of the radiation patch at the corresponding position of the lower dielectric substrate; the feed network on the lower dielectric substrate can realize circular polarization through design. This antenna uses four radiation patches on every layer of laminated structure, and four patches of lower floor realize that double-fed point side feeds through the feed network to carry out the coupling feed to the upper patch and form dual-frenquency circular polarization characteristic, antenna overall structure is simpler, and the preparation of being convenient for has light transmission performance and can get up with solar cell integration.
Description
Technical Field
The invention relates to the field of wireless communication and green energy, in particular to a solar cell circularly polarized satellite transparent antenna based on a transparent conductive film.
Background
The new energy is rapidly developed and begins to be applied to all aspects of our life, and the photovoltaic solar energy is an inexhaustible pollution-free green energy as an important representative of the new energy. An antenna is indispensable in a wireless communication system as a signal transceiving device, and the performance and appearance structure of the antenna have very important influence on the whole communication system. The solar cell and the antenna are integrated together, so that the method is an economic and effective means, the space and the caliber of the antenna can be greatly increased, and the antenna can be protected to a certain degree. However, many existing antennas use opaque copper as a radiation patch, a feed network, and a ground plane, so that the antennas cannot be combined with a solar cell, and the aperture of the cell cannot be effectively utilized.
Of course, there is also a technology disclosed a transparent antenna, such as an optically transparent antenna disclosed in patent No. CN201510955346.1, the structure including: the antenna comprises a first layer, a second layer and a third layer which are sequentially connected, wherein the first layer is an antenna radiator layer, the second layer is a dielectric layer with a transparent characteristic, the third layer is an antenna ground layer, the antenna radiator layer is made of an Indium Tin Oxide (ITO) film serving as a radiation patch, and the antenna ground layer is a slotted type frequency selective surface. Because the frequency selective surface of the optical transparent antenna in the scheme is a slotted frequency selective surface and belongs to a band-pass frequency selective surface on the aspect of frequency characteristics, incident electromagnetic waves can be reflected in a pass band, the transmission characteristic is shown outside the pass band, and the directional characteristic is shown when the optical transparent antenna works in the pass band of the frequency selective surface by utilizing the frequency selective characteristic of the frequency selective surface. But the transparent antenna structure cannot achieve circular polarization of the entire antenna array.
Disclosure of Invention
In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide a transparent solar cell circularly polarized satellite antenna based on a transparent conductive film, which has a laminated structure and good light transmission and can be used in the fields of mobile communication, frontier defense, radar detection, etc.
In order to solve the technical problems, the invention adopts the following technical scheme:
a solar cell circularly polarized satellite transparent antenna based on a transparent conductive film comprises the following components from top to bottom: the device comprises an upper micro-strip radiation patch, an upper dielectric substrate, an air layer, a micro-strip line feed network, a lower micro-strip radiation patch, a lower dielectric substrate, a ground reflection patch and a solar cell; wherein the content of the first and second substances,
the upper layer of microstrip radiation patch and the lower layer of microstrip radiation patch are square and form an antenna array by four parts, and the positions of the upper layer of microstrip radiation patch and the lower layer of microstrip radiation patch correspond to each other respectively;
the upper dielectric substrate and the lower dielectric substrate have the same area and are made of the same material;
the air layer separates the upper medium from the lower medium;
the size of the ground reflection patch is the same as that of the medium substrate.
Preferably, the ground reflection patch antenna further comprises an SMA connector, a probe of the SMA connector is connected with the microstrip line feed network, and the microstrip line feed network is connected with the ground reflection patch through the SMA connector for feeding.
Preferably, the upper dielectric substrate and the lower dielectric substrate are made of one of polyethylene terephthalate, polymethyl methacrylate, and transparent glass.
Preferably, the microstrip radiation patch, the microstrip line feed network and the ground reflection patch are all transparent conductive films.
Preferably, the transparent conductive film is one or more of an indium tin oxide film, a transparent metal mesh film and a graphene film.
Preferably, the transparency of the transparent conductive film raw materials of the microstrip radiation patch, the feed network and the ground reflection patch is greater than 70%, and the sheet resistance is less than 10 Ω/sq.
Preferably, the solar cell is monocrystalline silicon or polycrystalline silicon.
Preferably, the working frequency range of the solar cell antenna covers 1980-2200 MHz.
Compared with the prior art, the invention has the beneficial effects that:
the invention discloses a transparent solar cell circularly polarized satellite antenna based on a transparent conductive film, which is made of a transparent substrate material and a transparent conductive film, has good light transmittance by using a laminated structure, can be directly integrated with a solar cell without influencing the normal work of the solar cell, further, a microstrip radiation patch of the antenna is square and has an upper layer and a lower layer, and a broadband or dual-frequency antenna can be generated by adjusting the size of the square patch; furthermore, the design of the feed network can realize that two feed points of a single patch generate degenerate modes with orthogonal polarization and 90-degree phase difference, so that circular polarization is achieved, and the whole antenna array also realizes that the whole antenna array integrally achieves circular polarization by sequentially 90-degree phase difference clockwise. The antenna can be used in the fields of mobile communication, frontier defense, radar detection and the like.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It is obvious that the drawings in the following description are some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive exercise.
Fig. 1 is a schematic overall structure diagram of an embodiment of a solar cell circularly polarized satellite transparent antenna based on a transparent conductive film according to the present invention;
FIG. 2(a) is a top view;
fig. 2(b) is a bottom view;
FIG. 2(c) is a side view;
FIG. 3 is a voltage standing wave ratio image of the circularly polarized satellite transparent antenna of the solar cell of FIG. 1;
FIG. 4(a) is a diagram showing a low-band center frequency f of a circularly polarized satellite transparent antenna of the present invention01Simulating a three-dimensional gain pattern for radiation characteristics at 1995 MHz;
FIG. 4(b) is a diagram showing the low-band center frequency f of the circularly polarized satellite transparent antenna of the solar cell of the present invention01The gain pattern of the xoz plane was simulated for radiation characteristics at 1995 MHz;
FIG. 4(c) is a diagram showing the low-band center frequency f of the circularly polarized satellite transparent antenna of the solar cell of the present invention01Simulating a gain directional diagram of a yoz plane according to radiation characteristics at 1995 MHz;
FIG. 4(d) is a diagram showing the low-band center frequency f of the circularly polarized satellite transparent antenna of the solar cell of the present invention01Axis ratio simulation plot at 1995 MHz;
FIG. 5(a) shows the center frequency f of the high frequency band of the circularly polarized satellite transparent antenna of the solar cell of the present invention02Simulating a three-dimensional gain directional diagram for radiation characteristics at 2185 MHz;
FIG. 5(b) shows the center frequency f of the high frequency band of the circularly polarized satellite transparent antenna of the solar cell of the present invention02Simulating xoz-plane gain patterns of radiation characteristics at 2185 MHz;
FIG. 5(c) shows the center frequency f of the high frequency band of the circularly polarized satellite transparent antenna of the solar cell of the present invention02Simulating a gain directional diagram of a yoz plane according to radiation characteristics at 2185 MHz;
FIG. 5(d) shows a solar cell circular electrode in the present inventionHigh-frequency-band center frequency f of sanitary transparent antenna02An axial ratio simulation diagram at 2185 MHz;
reference numerals: 1 is an upper microstrip radiation patch, 2 is an upper dielectric substrate, 3 is an air layer, 4 is a microstrip feed network, 5 is a lower microstrip radiation patch, 6 is a lower dielectric substrate, 7 is a ground reflection patch, 8 is a monocrystalline silicon solar cell, and 9 is an SMA joint
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The examples are given for the purpose of better illustration of the invention, but the invention is not limited to the examples. Therefore, those skilled in the art should make insubstantial modifications and adaptations to the embodiments of the present invention in light of the above teachings and remain within the scope of the invention.
It should be noted that the subscripts of the formulae herein are used for distinction and do not represent other definitions unless otherwise explained.
Example 1
Referring to fig. 1, there is shown a schematic structural diagram of a circularly polarized transparent solar cell antenna based on a transparent conductive film according to the present invention, and fig. 2(a) -2 (c), the antenna comprises, from top to bottom: the device comprises an upper-layer microstrip radiation patch 1, an upper-layer dielectric substrate 2, an air layer 3, a microstrip line feed network 4, a lower-layer microstrip radiation patch 5, a lower-layer dielectric substrate 6, a ground reflection patch 7, a solar cell (silicon layer) 8 and an SMA joint 9; wherein the content of the first and second substances,
the upper layer microstrip radiation patch 1 and the lower layer microstrip radiation patch 5 are both square and are formed into an array by four blocks; the central points of the upper microstrip radiation patch 1 and each of the lower microstrip radiation patches 5 are superposed in the vertical direction, and the size of the upper patch 1 is slightly smaller than that of the lower patch 5;
the upper dielectric substrate 2 and the lower dielectric substrate 6 are separated by an air layer 3 through an isolation column;
the microstrip line feed network 4 can be designed in various ways, so that various antenna polarization forms are realized, and the diversity and the performance of the antenna are improved;
the probe of the SMA joint 9 is connected with the microstrip line feed network 4, and the ground reflection patch 7 is connected with the SMA joint 9 for feeding.
In this embodiment, the upper dielectric substrate 2 and the lower dielectric substrate 6 can be made of transparent substrate materials, such as polyethylene terephthalate (PET), polymethyl methacrylate (PMMA), and transparent glass. In the embodiment, the antenna is made of polymethyl methacrylate, the dielectric constant of the antenna is 3, and the thicknesses of the antenna are respectively 4mm and 2mm (the upper and lower dielectric layers can also adopt other transparent substrate materials with stable dielectric constants within the range of 1980-2200MHz, and the thickness of the upper and lower dielectric layers is determined by the working frequency range and the size of the antenna), the lower dielectric substrate 6 separates the layer of the feed network from the ground to form a resonant cavity; the upper dielectric substrate 2 can play a role in supporting the upper radiation patch; the air layer 3 is for widening a frequency band.
Preferably, the upper microstrip radiating patch 1, the microstrip line feed network 4, the lower radiating patch 5 and the ground reflecting patch 7 may be made of transparent conductive materials, such as Indium Tin Oxide (ITO) thin films, transparent metal mesh thin films, graphene thin films, and the like; in one embodiment, the antenna is made of a transparent metal mesh film, and has a transparency of more than 70%, a sheet resistance of 0.1 Ω/sq, and a thickness of 0.175mm (the radiation patch may also be made of other transparent conductive materials with higher transparency and smaller sheet resistance, and its thickness should be as small as possible).
Further, the working frequency of the solar cell circularly polarized satellite transparent antenna in the embodiment is 1980-2200 MHz.
Specifically, the present embodiment further provides a method for manufacturing the antenna, where: preparing an upper-layer microstrip radiation patch on two transparent conductive films with the same size as the dielectric substrate, preparing a microstrip line feed network and a lower-layer microstrip radiation patch on one transparent conductive film, preparing the radiation patches by adopting a film photoetching technology, manufacturing a required antenna pattern into a mask, covering a photoresist dry film on the transparent conductive films, and exposing by using ultraviolet light. Obtaining the required pattern through developing, etching and film removing; in the embodiment, the antenna is manufactured by bonding the prepared radiation patch with the upper dielectric substrate, and the feed network, the lower radiation patch and the ground reflection patch are respectively bonded on two sides of the lower dielectric substrate. Specifically, the back adhesive carried by the transparent conductive film is extruded by a laminating machine for bonding. And connecting one end of the SMA port with a microstrip line feed network port, and connecting the other end of the SMA port with a ground reflection patch. And finally, adhering the solar cell on a ground reflection patch through optical cement, and curing the optical cement by using an ultraviolet lamp to manufacture the circularly polarized transparent solar cell antenna.
Example 2
Based on the embodiment 1, the embodiment designs a circularly polarized transparent solar cell antenna, and performs performance simulation on the antenna by using full-wave electromagnetic simulation software, and the simulation experiment result verifies the feasibility and effectiveness of the invention adopting the laminated structure.
Specifically, the transparent conductive film and the transparent dielectric plate form: the device comprises an upper radiation patch, an upper dielectric substrate, an air layer, a microstrip line feed network, a lower radiation patch, a lower dielectric substrate, a floor and a laminated structure of a solar cell. The antenna structure part is made of transparent materials, has good light transmission (up to 75%), can design a feed network, and realizes antennas with various polarization modes and high performance. The invention designs a high-gain double-frequency circularly polarized antenna; the obtained voltage standing waves of the antenna in the low frequency range of 1980-2010MHz and the high frequency range of 2170-2200MHz are shown in FIG. 3, which shows that the voltage standing wave ratio of the antenna in the present invention is less than 2.2 and slightly greater than 2 in the whole frequency range, but still can satisfy the performance of the antenna;
FIG. 4(a) -FIG. 4(d) and FIG. 5(a) -FIG. 5(d) show the center frequency f in the low band011995MHz and high band center frequency f02Day at 2185MHzSimulation results of line gain and axial ratio directional diagrams, f01Maximum gain of the antenna at 1995MHz is 10.4dBi, f02The maximum gain of the antenna is 10.3dBi when the antenna is 2185MHz, the axial ratio of a low frequency band and a high frequency band is less than 3dB, and the figures represent the radiation characteristic and the circular polarization characteristic of the antenna, so that the solar cell has good radiation performance of the circularly polarized transparent antenna and good axial ratio and gain.
The above embodiments of the present invention are described with reference to the drawings, and the obtained transparent antenna effect is good but not best, and it can be seen that, in the above embodiments, different materials are selected during the manufacturing process, which may cause different process parameters and final results.
Claims (8)
1. A solar cell circularly polarized satellite transparent antenna based on a transparent conductive film is characterized by comprising the following components from top to bottom: the device comprises an upper micro-strip radiation patch, an upper dielectric substrate, an air layer, a micro-strip line feed network, a lower micro-strip radiation patch, a lower dielectric substrate, a ground reflection patch and a solar cell; wherein the content of the first and second substances,
the upper layer of microstrip radiation patch and the lower layer of microstrip radiation patch are square and form an antenna array by four parts, and the positions of the upper layer of microstrip radiation patch and the lower layer of microstrip radiation patch correspond to each other respectively;
the upper dielectric substrate and the lower dielectric substrate have the same area and are made of the same material;
the air layer separates the upper medium from the lower medium;
the size of the ground reflection patch is the same as that of the medium substrate.
2. The antenna of claim 1, further comprising an SMA contact, wherein a probe of the SMA contact is connected to the microstrip line feed network, and the microstrip line feed network and the ground reflective patch are connected to feed through the SMA contact.
3. The antenna of claim 1, wherein the upper dielectric substrate and the lower dielectric substrate are made of one of polyethylene terephthalate, polymethyl methacrylate and transparent glass.
4. The antenna of claim 1, wherein the microstrip radiating patch, the microstrip line feed network, and the ground reflecting patch are transparent conductive films.
5. The antenna of claim 4, wherein the transparent conductive film is one or more of an indium tin oxide film, a transparent metal mesh film, and a graphene film.
6. The antenna of claim 4, wherein the transparency of the transparent conductive film of the microstrip radiating patch, the feeding network, and the ground reflecting patch is greater than 70%, and the sheet resistance is less than 10 Ω/sq.
7. The antenna of claim 1, wherein the solar cell is monocrystalline or polycrystalline silicon.
8. The antenna as claimed in claim 1, wherein the operating band of the solar cell antenna covers 1980-2200 MHz.
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| CN202110685945.1A CN113555678A (en) | 2021-06-21 | 2021-06-21 | Solar cell circularly polarized transparent satellite antenna based on transparent conductive film |
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| CN202110685945.1A CN113555678A (en) | 2021-06-21 | 2021-06-21 | Solar cell circularly polarized transparent satellite antenna based on transparent conductive film |
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| CN115360519B (en) * | 2022-07-29 | 2024-02-06 | 西安电子科技大学 | High-light-transmittance reflective array antenna based on micro-metal wire structure |
| CN117117519A (en) * | 2023-09-08 | 2023-11-24 | 南京罗朗微太电子科技有限公司 | Broadband optical transparent reflective array antenna based on mixed medium and heterogeneous unit and preparation method thereof |
| CN117117519B (en) * | 2023-09-08 | 2024-04-12 | 南京罗朗微太电子科技有限公司 | Broadband optical transparent reflective array antenna based on mixed medium and heterogeneous unit and preparation method thereof |
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