CN110718767A - High-efficiency plane electromagnetic wave polarization converter - Google Patents
High-efficiency plane electromagnetic wave polarization converter Download PDFInfo
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- CN110718767A CN110718767A CN201910962951.XA CN201910962951A CN110718767A CN 110718767 A CN110718767 A CN 110718767A CN 201910962951 A CN201910962951 A CN 201910962951A CN 110718767 A CN110718767 A CN 110718767A
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- electromagnetic wave
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- medium substrate
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- wave polarization
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
- H01Q15/24—Polarising devices; Polarisation filters
- H01Q15/242—Polarisation converters
Abstract
The invention discloses a high-efficiency plane electromagnetic wave polarization converter, which comprises a medium substrate, a receiving layer positioned on one surface of the medium substrate and a transmitting layer positioned on the other surface of the medium substrate, wherein the receiving layer comprises a first receiving plate and a second receiving plate which are arranged in parallel, the transmitting layer comprises a first transmitting plate and a second transmitting plate which are arranged in parallel, a first metal through hole and a second metal through hole are formed in the medium substrate, the first receiving plate and the first transmitting plate are vertically arranged and are connected through the first metal through hole in the medium substrate, the second receiving plate and the second transmitting plate are vertically arranged and are connected through the second metal through hole in the medium substrate, and the receiving layer, the medium substrate and the transmitting layer are equivalent to an LC resonance unit. The invention improves the current situation that the overall electromagnetic energy collection efficiency of the existing polarization conversion device is generally lower, and greatly improves the polarization conversion efficiency. And the manufacturing is simple, the operation is convenient, and the method has very high application prospect in practice.
Description
Technical Field
The invention belongs to the field of electromagnetism, relates to electromagnetic wave polarization conversion and polarization conversion efficiency, and particularly relates to a high-efficiency planar electromagnetic wave polarization converter.
Background
The polarization state has important applications in communication, navigation, radar detection and the like, so that the realization of the control of the polarization state of the electromagnetic wave is very important. Due to the characteristics of electric waves, the signals which determine horizontal polarization propagation can generate polarization current on the surface of the ground when being close to the ground, the polarization current generates heat energy due to the influence of ground impedance so that electric field signals are quickly attenuated, and the vertical polarization mode is not easy to generate the polarization current, so that the large-amplitude attenuation of energy is avoided, and the effective propagation of the signals is ensured. Therefore, in mobile communication systems, a vertically polarized propagation system is generally used. Most high power microwave sources, such as magnetically insulated wire oscillators, relativistic backward wave tubes, virtual cathode oscillators, etc., output the relevant polarization mode. Some modes are not favorable for directional emission and space transmission of high-power microwaves; therefore, in application, it is usually necessary to convert the polarization by an electromagnetic wave polarization converter and radiate the converted polarization through an antenna.
Disclosure of Invention
The purpose of the invention is as follows: the 8.38GHz electromagnetic wave polarization converter with a novel structure and high efficiency is provided, so that the theoretical value of the polarization conversion efficiency reaches 98.7%. The current situation that the overall electromagnetic energy collection efficiency of the conventional polarization conversion device is generally low is improved, so that the polarization conversion efficiency is greatly improved.
The technical scheme is as follows: in order to realize the purpose, the invention adopts the following technical scheme:
according to the invention, by designing a rotational symmetric structure, namely the receiving layer and the transmitting layer are in the rotational symmetric structure, the incident horizontal polarized wave can be converted into the vertical polarized wave, or the incident vertical polarized wave can be converted into the horizontal polarized wave, so that the interconversion of the horizontal polarized wave and the vertical polarized wave is realized, and the conversion efficiency is far higher than that of the traditional polarization conversion device.
The utility model provides a high-efficient plane electromagnetic wave polarization converter, including the medium base plate, be located the receiving layer of medium base plate one side and be located the transmission layer of medium base plate another side, the receiving layer is including parallel arrangement's first receiving board and second receiving board, the transmission layer is including parallel arrangement's first transmitting board and second transmitting board, first metal via hole and second metal via hole have been seted up on the medium base plate, first receiving board and first transmitting board set up perpendicularly, and be connected through the first metal via hole on the medium base plate, second receiving board and second transmitting board set up perpendicularly, and be connected through the second metal via hole on the medium base plate, the receiving layer, medium base plate and transmission layer equivalence are a LC resonance unit.
Optionally, the resonant frequency is adjusted by adjusting the size of the opening gap g between the first receiving plate and the second receiving plate and between the first transmitting plate and the second transmitting plate. As the g size increases, the resonant frequency decreases; as the g size decreases, the resonant frequency becomes larger. Wherein 0mm < g <15.5mm, and in particular, the value range of g is not limited for the unit size, and the corresponding adjustment resonant frequency range is not limited (different unit sizes correspond to different resonant frequencies).
Optionally, the electromagnetic wave polarization converter can be periodically expanded; the receiving layer and the transmitting layer are equivalent to an LC oscillation circuit, and the circuit conduction is realized. .
Optionally, the dielectric substrate is an F4B dielectric substrate, and the substrate made of the material has the characteristics of low manufacturing cost and capability of well converting incident polarized waves into corresponding polarized waves; the receiving layer and the transmitting layer are formed by two layers of artificial structures, the artificial structures are made of copper materials, and an opening is formed in the middle of each artificial structure to form an interval g; the receiving layer and the transmitting layer are connected through a metal through hole, the receiving layer and the transmitting layer are equivalent to an LC resonance circuit, and polarized electromagnetic waves with incident frequencies of 8.38GHz can be efficiently absorbed.
Optionally, the electromagnetic wave polarization converter is equivalent to a four-port network, and impedances corresponding to the four ports are Zmax (1), Zmax (2), Zmix (1), and Zmix (2), respectively.
Optionally, the electromagnetic wave polarization converter operates at 8.38GHz, and the receiving efficiency can reach 98.7% theoretically.
Has the advantages that: compared with the prior art, the invention has the advantages that:
1. the invention has simple manufacture and convenient processing. The designed electromagnetic wave polarization converter can enable the receiving resonance frequency to be adjustable by changing the size of the structure. Therefore, the electromagnetic wave polarization converter designed by the invention has good adjustability.
2. The receiving layer and the transmitting layer of the polarization conversion device are connected through the metal through hole, loop conduction is achieved, the resonance point of the receiving device can be changed by adjusting the size of the opening g of the receiving and transmitting structure (0mm < g <15.5mm), the polarization conversion device can work efficiently, and the maximum polarization conversion efficiency reaches 98.7%. (ii) a
3. The electromagnetic wave polarization converter designed by the invention can be used for periodic expansion (periodic extension is carried out on a two-dimensional plane where the structure is located), so that the structure is flexible and changeable, and application volume production is easy to realize.
Drawings
FIG. 1 is a schematic diagram of an electromagnetic wave polarization converter;
FIG. 2 is a schematic diagram of an electromagnetic wave polarization transformer structure receiving layer;
FIG. 3 is a schematic diagram of an electromagnetic wave polarization transformer structure emitting layer;
FIG. 4 is an equivalent four-port network of an electromagnetic wave polarization converter;
fig. 5 is S11 of the electromagnetic wave polarization transformer;
fig. 6 shows an electromagnetic wave polarization transformer structure S21;
fig. 7 is a schematic view of polarization conversion efficiency.
Detailed Description
The technical solution of the present invention is further described below with reference to the accompanying drawings and specific embodiments, and it should be noted that the following examples mainly illustrate the advantages of the electromagnetic wave polarization converter. Although only a few embodiments of the present invention have been described, it will be appreciated by those skilled in the art that the present invention is not limited by the foregoing embodiments, and may be embodied in many other forms without departing from the spirit or scope thereof, and that such changes and modifications are to be considered within the scope of the claimed invention.
According to the current situation of the existing polarization conversion device, a novel, novel and efficient planar electromagnetic wave polarization converter is provided. It comprises two parts of a substrate and a polarization conversion device. The first part is that the substrate is an F4B medium substrate, and the substrate made of the material has the characteristics of low manufacturing cost and capability of well converting incident polarized waves into corresponding polarized waves; the second part, receiving layer and transmitting layer comprise two-layer artificial structure, and the artificial structure is copper material, and the department opening forms interval g in the middle of the artificial structure. The receiving layer and the transmitting layer are connected through a metal through hole, the receiving layer and the transmitting layer are equivalent to an LC resonance circuit, and polarized electromagnetic waves with incident frequencies of 8.38GHz can be efficiently absorbed.
As shown in fig. 1, a high-efficiency planar electromagnetic wave polarization converter includes a dielectric substrate, a receiving layer on one side of the dielectric substrate, and an emitting layer on the other side of the dielectric substrate, where the dielectric substrate is an F4B dielectric substrate, and the receiving layer and the emitting layer are connected through a metal via on the F4B dielectric substrate. The receiving layer comprises a first receiving plate and a second receiving plate which are arranged in parallel, the transmitting layer comprises a first transmitting plate and a second transmitting plate which are arranged in parallel, the first receiving plate and the first transmitting plate are arranged vertically and are connected through a first metal through hole in the medium substrate, the second receiving plate and the second transmitting plate are arranged vertically and are connected through a second metal through hole in the medium substrate, and the receiving layer, the medium substrate and the transmitting layer are equivalent to an LC resonance unit. When the cell resonates, a resonant current is generated at the cell surface, thereby achieving polarization conversion. And the structure shown in fig. 1 can be periodically extended on a two-dimensional plane where the structure is located to form a periodic extension structure, so that stronger surface current can be well generated by resonance, the polarization conversion efficiency is higher, and the receiving layer and the emitting layer are equivalent to an LC oscillation circuit to realize circuit conduction.
The high-efficiency plane electromagnetic wave polarization converter adopts a resonance artificial structure (namely a transmitting layer and a receiving layer) as a polarization conversion device, the size of a substrate is 16mm multiplied by 2mm (the size of the high-efficiency plane electromagnetic wave polarization converter is fixed corresponding to 8.38 GHZ), and the receiving efficiency can reach 98.7% theoretically.
FIG. 2 is a schematic diagram of a receiving layer of an electromagnetic wave polarization converter structure, wherein the receiving layer is composed of a patch made of copper with an opening in the middle and has a thickness of 0.035 mm; fig. 3 is a schematic diagram of an electromagnetic wave polarization converter structure emitting layer, which is composed of a patch made of copper material with an opening in the middle and has a thickness of 0.035 mm. The receiving layer and the transmitting layer are of a rotational symmetric structure, and can convert incident horizontal polarized waves into vertical polarized waves or convert incident vertical polarized waves into horizontal polarized waves, so that the interconversion of the horizontal polarized waves and the vertical polarized waves is realized, and the conversion efficiency is far higher than that of a traditional polarization conversion device. The high-efficiency electromagnetic wave polarization converter works at a fixed size L of 16mm and g of 3mm corresponding to 8.38 GHZ. The resonance frequency can be conveniently adjusted by changing the size of the opening interval g in the receiving layer and the transmitting layer, and the adjustability is good. As the g size increases, the resonant frequency decreases; as the g size decreases, the resonant frequency becomes larger. Wherein 0mm < g <15.5mm, and in particular, the value range of g is not limited for the unit size, and the corresponding adjustment resonant frequency range is not limited (different unit sizes correspond to different resonant frequencies).
As shown in fig. 4, the electromagnetic wave polarization converter is equivalent to a four-port network, that is, the receiving layer corresponds to a port max (1) and a port max (2), and the transmitting layer corresponds to four port ports min (1) and min (2); where 1 represents the vertical polarization state and 2 the horizontal polarization state. The impedance corresponding to each port is Zmax (1), Zmax (2), Zmin (1) and Zmin (2).
As shown in FIG. 5, the invention can receive polarized electromagnetic wave of 8.38GHz well, and when the frequency of the incident wave is 8.38GHz, S11 of the electromagnetic wave polarization converter reaches-34.29 dB.
As shown in fig. 6, the vertically polarized wave is characterized by 1, and the horizontally polarized wave is characterized by 2, and the simulation result of the S parameter in fig. 6 shows that the vertically polarized wave can be well converted into the horizontally polarized wave; meanwhile, the horizontal polarized wave can be well converted into the vertical polarized wave;
as shown in fig. 7, the present invention has a great breakthrough in polarization conversion efficiency, so that the polarization conversion efficiency reaches 98.7%. The current situation that the overall electromagnetic energy collection efficiency of the conventional polarization conversion device is generally low is improved, so that the polarization conversion efficiency is greatly improved.
The invention can realize polarization conversion and frequency modulation characteristics by adjusting the sizes of the structure and the symmetrical structure thereof, such as changing the values of L and g. By changing the size of the unit, the resonance frequency can be changed, and the frequency band adjustability of incident waves corresponding to polarization conversion is realized.
The planar efficient polarization converter takes an F4B dielectric substrate as a carrier, a receiving layer and an emitting layer are respectively printed on two sides of the dielectric substrate, and the receiving layer and the emitting layer are connected through a pair of metalized through holes. The polarization converter can well convert vertical polarized waves into horizontal polarized waves; meanwhile, the horizontal polarized wave can be well converted into the vertical polarized wave; the invention has great breakthrough on the polarization conversion efficiency, so that the polarization conversion efficiency reaches 98.7 percent. The current situation that the overall electromagnetic energy collection efficiency of the conventional polarization conversion device is generally low is improved, so that the polarization conversion efficiency is greatly improved. And the manufacturing is simple, the operation is convenient, compared with the prior improved mode, the method has absolute advantages, and has very high application prospect in practice.
Claims (6)
1. A high efficiency planar electromagnetic wave polarization converter, characterized by: the medium substrate comprises a medium substrate, a receiving layer and an emitting layer, wherein the receiving layer is located on one side of the medium substrate, the emitting layer is located on the other side of the medium substrate, the receiving layer comprises a first receiving plate and a second receiving plate which are arranged in parallel, the emitting layer comprises a first emitting plate and a second emitting plate which are arranged in parallel, a first metal through hole and a second metal through hole are formed in the medium substrate, the first receiving plate and the first emitting plate are arranged vertically and are connected through the first metal through hole in the medium substrate, the second receiving plate and the second emitting plate are arranged vertically and are connected through the second metal through hole in the medium substrate, and the receiving layer, the medium substrate and the emitting layer are equivalent to an LC resonance unit.
2. A high efficiency planar electromagnetic wave polarization converter as claimed in claim 1, wherein: the resonance frequency is adjusted by adjusting the size of the opening gap g between the first receiving plate and the second receiving plate and between the first transmitting plate and the second transmitting plate.
3. A high efficiency planar electromagnetic wave polarization converter as claimed in claim 1, wherein: the electromagnetic wave polarization converter can be periodically expanded.
4. A high efficiency planar electromagnetic wave polarization converter as claimed in claim 1, wherein: the dielectric substrate is F4B dielectric substrate, and the receiving layer and the emitting layer are made of copper.
5. A high efficiency planar electromagnetic wave polarization converter as claimed in claim 1, wherein: the electromagnetic wave polarization converter is equivalent to a four-port network, and the impedances corresponding to the four ports are Zmax (1), Zmax (2), Zmix (1) and Zmix (2) respectively.
6. A high efficiency planar electromagnetic wave polarization transformer as claimed in claim 1, wherein the electromagnetic wave polarization transformer operates at 8.38 GHz.
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| CN201910962951.XA CN110718767A (en) | 2019-10-11 | 2019-10-11 | High-efficiency plane electromagnetic wave polarization converter |
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| CN201910962951.XA CN110718767A (en) | 2019-10-11 | 2019-10-11 | High-efficiency plane electromagnetic wave polarization converter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111541031A (en) * | 2020-04-16 | 2020-08-14 | 华南理工大学 | Broadband low-profile transmission array antenna and wireless communication equipment |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106953169A (en) * | 2017-04-27 | 2017-07-14 | 南京信息工程大学 | A kind of planar structure electromagnetic wave vertical polarization is to horizontal polarization converter |
| CN108365344A (en) * | 2018-04-13 | 2018-08-03 | 桂林电子科技大学 | A kind of reconfigurable function polarization converter based on active super surface |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106953169A (en) * | 2017-04-27 | 2017-07-14 | 南京信息工程大学 | A kind of planar structure electromagnetic wave vertical polarization is to horizontal polarization converter |
| CN108365344A (en) * | 2018-04-13 | 2018-08-03 | 桂林电子科技大学 | A kind of reconfigurable function polarization converter based on active super surface |
Non-Patent Citations (1)
| Title |
|---|
| PENG XU，ET AL: "An Ultrathin Cross-Polarization Converter With Near Unity Efficiency for Transmitted Waves", 《IEEE TRANSACTIONS ON ANTTENNAS AND PROPAGATION》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111541031A (en) * | 2020-04-16 | 2020-08-14 | 华南理工大学 | Broadband low-profile transmission array antenna and wireless communication equipment |
| CN111541031B (en) * | 2020-04-16 | 2021-08-10 | 华南理工大学 | Broadband low-profile transmission array antenna and wireless communication equipment |
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Application publication date: 20200121 |
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