CN110931946A - Conformal aqueous medium resonator antenna and working method thereof - Google Patents
Conformal aqueous medium resonator antenna and working method thereof Download PDFInfo
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- CN110931946A CN110931946A CN201911151193.XA CN201911151193A CN110931946A CN 110931946 A CN110931946 A CN 110931946A CN 201911151193 A CN201911151193 A CN 201911151193A CN 110931946 A CN110931946 A CN 110931946A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/27—Adaptation for use in or on movable bodies
- H01Q1/273—Adaptation for carrying or wearing by persons or animals
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P7/00—Resonators of the waveguide type
- H01P7/10—Dielectric resonators
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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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/48—Earthing means; Earth screens; Counterpoises
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- 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
- H01Q3/22—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the orientation in accordance with variation of frequency of radiated wave
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Abstract
The invention discloses a conformal aqueous medium resonator antenna and a working method thereof, wherein the conformal aqueous medium resonator antenna comprises the following steps: purified water, a glass container, a floor, a dielectric substrate, a feeder line and a water valve; the glass container is conformal with the dielectric resonator and is fixed in the middle of the dielectric substrate; the lower surface of the medium substrate is attached to a covering floor; the upper surface side of the dielectric substrate and the left side and the top of the glass container are respectively attached to cover the feeder; the antenna is fed by a feed line and electromagnetic wave energy is then excited into a dielectric resonator mode by the feed line. The invention has the advantages that: due to the fact that the antenna is of a conformal structure and has a very low profile, the size of space occupied by the antenna in the vertical direction is reduced; the processing is easy; the wearable structure has wide application field and flexible application scene; due to the fluidity and the transparent characteristic of water, the frequency reconfigurability is realized; having a wider bandwidth.
Description
Technical Field
The invention relates to the field of wireless communication, in particular to a conformal aqueous medium resonator antenna and a working method thereof.
Background
With the rapid development of wireless communication technology, people have higher and higher requirements on the portability of wireless communication devices, and various wearable devices are in the endlessly, which prompts the development of wireless communication devices towards the direction of conformality.
So far, conformal antennas in the industry are mostly based on microstrip antennas, which use flexible substrates such as: 1. organic flexible media such as polyimide, polyethylene terephthalate, polylactic acid, photographic paper, and the like; 2. and the fabric is woven by felts, woven fabrics and the like. The metal patch is made of flexible copper foil or conductive fabric. However, the dielectric resonator antenna is not actually applied to a low-profile conformal device, and compared with a microstrip antenna, the dielectric resonator antenna has many advantages such as wide bandwidth, high polarization purity, high design freedom, multiple radiation modes, and the like, and can further meet the requirements of a conformal system on the antenna.
Pure water (also called distilled water) is a liquid medium with high dielectric constant, and is a special liquid medium resonance antenna when used for manufacturing the antenna. The electromagnetic wave is radiated at the discontinuity of the medium by suitably exciting the antenna resonant mode. Compared to conventional metal antennas, aqueous dielectric resonator antennas have a number of unique advantages, including: the antenna has the advantages of low cost, compact structure (the dielectric constant of pure water is about 78 at 100MHz and 20 ℃, the antenna is manufactured, the size of the antenna can be obviously reduced due to the high dielectric constant of the pure water), easy reconstruction, easy feed (when a solid medium feeds, a gap is easily generated between a feed structure and the medium, the performance of the antenna is influenced), good stealth performance, convenient transportation, transparency and environmental protection. The unique advantages enable the pure water antenna to hopefully replace the existing metal antenna in some special applications, and overcome the defects of poor reconfigurability and difficult invisibility of the existing antenna, so the technology has wide application prospect and scientific research value.
The design of the pure water dielectric resonant antenna mainly faces two problems at present: 1. the Quality Factor of the pure water antenna is high (Q), the bandwidth of the antenna is narrow, and the pure water antenna has limitation on application of some broadband; 2. the advantages of the purified water such as fluidity, transparency and the like are not fully exerted, the water is a liquid material suitable for the reconfigurable liquid antenna, and antenna structures with relatively complex structures and difficult formation of solid materials can be formed on the basis of not using external active devices.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a conformal aqueous medium resonator antenna and a working method thereof, which can effectively solve the problems in the prior art.
In order to realize the purpose, the technical scheme adopted by the invention is as follows:
a conformal aqueous dielectric resonator antenna, comprising: the device comprises purified water 1, a glass container 2, a floor 3, a medium substrate 4, a feeder 5 and a water valve 6;
the dielectric substrate 4 is conformal with the glass container 2, and the glass container 2 is fixed in the middle of the upper surface of the dielectric substrate 4;
the lower surface of the dielectric substrate 4 is attached to and covered with the floor 3, and the floor 3 is made of copper foil; a feed line 5 extends from one end of the dielectric substrate 4 along the upper surface to the top of the side of the glass container 2;
the antenna is fed by a feeder 5, and then electromagnetic wave energy is excited into a dielectric resonator mode through the feeder 5, and the glass container 2 and the pure water 1 constitute a dielectric resonator.
The water valves 6 are used for injecting and discharging the purified water 1, the number of the water valves 6 is two, the two water valves 6 are respectively located at the top and the bottom of the side wall of the glass container 2, the water valve 6 at the top is used for injecting the purified water 1, and the water valve 6 at the bottom is used for discharging the purified water 1.
Further, the glass container 2 is made of resin glass, the relative dielectric constant is 5.5, the thickness is 5mm, the length of the wide side is 57mm, the inner diameter is 185mm, the outer diameter is 233mm, and the radian is 60 degrees;
the diameter of the water valve 6 is 4mm, the length of the water valve 6 is 5mm, the axis of the water valve 6 is positioned in a coordinate axis yoz plane and is parallel to a y axis, the distance between the axis of the water valve 6 positioned at the bottom of the glass container 2 and the y axis is 63.3mm, and the distance between the axis of the water valve 6 positioned at the top of the glass container 2 and the y axis is 94.3 mm.
Further, the dielectric substrate 4 is made of Teflon, the relative dielectric constant of the dielectric substrate 4 is 2.1, the thickness is 0.8mm, the width is 300mm, the inner diameter is 185mm, the outer diameter is 185.8mm, and the radian is 90 degrees.
Furthermore, the feeder 5 is attached to the upper surface of the dielectric substrate 4 and the left side and the top surface of the glass container 2, the feeder 5 is a copper microstrip line, the width of the feeder 5 is 2.5mm, the length of the feeder is 104.5mm, the axis of the feeder 5 coincides with the center line of the wide side of the dielectric substrate 4 by 48.4mm, the axis of the feeder 5 coincides with the center line of the left side of the glass container 2 by 48mm, and the axis of the feeder 5 coincides with the center line of the top of the glass container 2 by 8.1 mm.
The invention also discloses a working method of the conformal aqueous medium resonator antenna, which comprises the following steps:
solving the resonant frequency and the internal field distribution of the antenna by using a separation variable method under the premise of single-mode assumption by using an eigenmode method under a cylindrical coordinate system; after the theoretical resonant mode of the antenna is obtained, the parameters of the feed structure are obtained according to the traditional antenna feed theory, the electric field in the antenna is stronger at the position of the feed line 5, and the direction of the electric field is consistent with that of the feed line, so that energy is coupled into the antenna through the feed line 5, and the required dielectric resonator mode is excited.
Further, the antenna of the present invention employs side feeding.
Compared with the prior art, the invention has the advantages that:
1. by analyzing the field distribution and the boundary structure in the conformal aqueous medium resonator antenna, an accurate approximate model is constructed.
2. And theoretically solving to obtain the resonant frequency and the internal field of the conformal water medium resonator by adopting a cylindrical wave function based on an accurate model.
3. The dielectric substrate is conformal with the dielectric resonator, so that the dielectric substrate can be applied to a curved surface and is suitable for wearable equipment; the overall structure is simple, mature theoretical solution and design methods are provided, and the design and application difficulty is greatly reduced. The antenna is based on a dielectric resonator antenna design and has a wider bandwidth compared with a traditional microstrip antenna. Easy to understand and strong in portability.
4. By utilizing the high dielectric constant characteristic of water, the compact design of the antenna can be realized, the sizes of the metal antenna and the dielectric resonance antenna with lower dielectric constant are larger, and the purified water antenna can obtain smaller size.
5. By utilizing the mobility and the transparency of water, the longitudinal structure of the dielectric resonator can be adjusted, more working states can be obtained, and the frequency reconfigurability of the antenna can be realized.
Drawings
FIG. 1 is a front view of an embodiment of a conformal aqueous dielectric resonator antenna of the present invention;
fig. 2 is a left side view of an embodiment of the present invention conformal aqueous dielectric resonator antenna;
FIG. 3 is a top view of an embodiment of a conformal aqueous dielectric resonator antenna of the present invention;
FIG. 4 shows the S11 parameters for the 340MHz to 380MHz band of the conformal aqueous dielectric resonator antenna of the present invention;
FIG. 5 is the gain at operating frequency of a conformal aqueous dielectric resonator antenna of the present invention;
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to the accompanying drawings by way of examples.
A conformal aqueous dielectric resonator antenna, comprising: the device comprises purified water 1, a glass container 2, a floor 3, a medium substrate 4, a feeder 5 and a water valve 6;
the dielectric substrate 4 is conformal with the glass container 2, and the glass container 2 is fixed in the middle of the upper surface of the dielectric substrate 4;
the lower surface of the dielectric substrate 4 is attached to and covered with the floor 3, and the floor 3 is made of copper foil;
the antenna is fed by a feeder line 5, then electromagnetic wave energy is excited to form a dielectric resonator mode through the feeder line 5, the glass container 2 and the pure water 1 form a dielectric resonator, and the outer surface of the water valve 6 is attached to the inner portion of one side face of the glass container 2.
The glass container 2 is made of resin glass, the relative dielectric constant is 5.5, the thickness is 5mm, the length of the wide side is 57mm, the inner diameter is 185mm, the outer diameter is 233mm, the radian is 60 degrees, the water valve 6 is used for injecting and flowing pure water 1, the diameter of the water valve 6 is 4mm, the length is 5mm, the outer surface of the water valve 6 is attached to the front inner portion of the glass container 2, the axis of the water valve 6 is located on a coordinate axis yoz plane and is parallel to the y axis, the axis of the water valve 6 located at the front bottom of the glass container 2 is 63.3mm away from the y axis, and the axis of the water valve 6 located at the front top of the glass container 2 is 94..
The dielectric substrate 4 is made of Teflon material, the relative dielectric constant of the dielectric substrate 4 is 2.1, the thickness is 0.8mm, the width is 300mm, the inner diameter is 185mm, the outer diameter is 185.8mm, and the radian is 90 degrees.
The feeder 5 is a copper microstrip line, the feeder 5 extends from one end of the dielectric substrate 4 to the top of the side face of the glass container 2 along the upper surface, the width of the feeder 5 is 2.5mm, the length of the feeder is 104.5mm, the axis of the feeder 5 coincides with the center line of the wide side of the dielectric substrate 4 by 48.4mm, the axis of the feeder 5 coincides with the center line of the left face of the glass container 2 by 48mm, and the axis of the feeder 5 coincides with the center line of the top face of the glass container 2 by 8.1 mm. Thereby providing a good match between the antenna and the feed structure.
The antenna of the present invention employs side feed. This is done to reduce the amount of space occupied by the antenna in the vertical direction.
The conformal aqueous medium resonator antenna and the theoretical design and working principle thereof are as follows: solving the resonant frequency and the internal field distribution of the antenna by using a separation variable method under the premise of single-mode assumption by using an eigenmode method under a cylindrical coordinate system; after the theoretical resonant mode of the antenna is obtained, the parameters of the feed structure are obtained according to the traditional antenna feed theory, the electric field in the antenna is stronger at the position of the feed line 5, and the direction of the electric field is consistent with that of the feed line, so that energy is coupled into the antenna through the feed line 5, and the required dielectric resonator mode is excited.
The antenna is based on a dielectric resonator antenna design and has a wider bandwidth compared with a traditional microstrip antenna. Thanks to its arc-shaped structure, the antenna can be applied to conformal wearable devices. By utilizing the high dielectric constant characteristic of water, a compact design of the antenna can be realized. By utilizing the mobility and the transparency of water, the longitudinal structure of the dielectric resonator can be adjusted, and the frequency reconfigurability of the antenna is realized.
Fig. 4 shows the S11 parameters for the 340MHz to 380MHz band for a conformal aqueous dielectric resonator antenna of the present invention.
Fig. 5 is the gain at operating frequency of a conformal aqueous dielectric resonator antenna of the present invention.
It will be appreciated by those of ordinary skill in the art that the examples described herein are intended to assist the reader in understanding the manner in which the invention is practiced, and it is to be understood that the scope of the invention is not limited to such specifically recited statements and examples. Those skilled in the art can make various other specific changes and combinations based on the teachings of the present invention without departing from the spirit of the invention, and these changes and combinations are within the scope of the invention.
Claims (6)
1. A conformal aqueous dielectric resonator antenna, comprising: the device comprises purified water (1), a glass container (2), a floor (3), a medium substrate (4), a feeder line (5) and a water valve (6);
the medium substrate (4) is conformal with the glass container (2), and the glass container (2) is fixed in the middle of the upper surface of the medium substrate (4);
the lower surface of the dielectric substrate (4) is attached to and covered with a floor (3), and the floor (3) is made of copper foil; the feeder line (5) extends from one end of the dielectric substrate (4) to the top of the side face of the glass container (2) along the upper surface;
the antenna is fed by a feeder line (5), then electromagnetic wave energy is excited to form a dielectric resonator mode through the feeder line (5), and the glass container (2) and the pure water (1) form a dielectric resonator;
the water valve (6) is used for injecting and flowing out of the purified water (1), the number of the water valves (6) is two, the water valves are respectively located at the top and the bottom of the side wall of the glass container (2), the water valve (6) at the top is used for injecting the purified water (1), and the water valve (6) at the bottom is used for discharging the purified water (1).
2. The conformal aqueous dielectric resonator antenna of claim 1, wherein: the glass container (2) is made of resin glass, the relative dielectric constant is 5.5, the thickness is 5mm, the length of the wide side is 57mm, the inner diameter is 185mm, the outer diameter is 233mm, and the radian is 60 degrees;
the diameter of the water valve (6) is 4mm, the length of the water valve (6) is 5mm, the axis of the water valve (6) is located in a coordinate axis yoz plane and is parallel to a y axis, the distance between the axis of the water valve (6) located at the bottom of the glass container (2) and the y axis is 63.3mm, and the distance between the axis of the water valve (6) located at the top of the glass container (2) and the y axis is 94.3 mm.
3. The conformal aqueous dielectric resonator antenna of claim 1, wherein: the dielectric substrate (4) is made of Teflon materials, the relative dielectric constant of the dielectric substrate (4) is 2.1, the thickness is 0.8mm, the width is 300mm, the inner diameter is 185mm, the outer diameter is 185.8mm, and the radian is 90 degrees.
4. The conformal aqueous dielectric resonator antenna of claim 1, wherein: feeder (5) laminating in the left side and the top surface of dielectric substrate (4) upper surface and glass container (2), feeder (5) are the copper microstrip line, feeder (5) width is 2.5mm, and length is 104.5mm, and feeder (5) axis and dielectric substrate (4) broadside central line coincidence 48.4mm, and feeder (5) axis and glass container (2) left side central line coincidence 48mm, and feeder (5) axis and glass container (2) top central line coincidence 8.1 mm.
5. A method of operating a conformal aqueous dielectric resonator antenna according to one of claims 1-4, wherein: solving the resonant frequency and the internal field distribution of the antenna by using a separation variable method under the premise of single-mode assumption by using an eigenmode method under a cylindrical coordinate system; after the theoretical resonant mode of the antenna is obtained, the parameters of the feed structure are obtained according to the traditional antenna feed theory, the electric field in the antenna is stronger at the position of the feed line (5), and the direction of the electric field is consistent with the direction of the electric field of the feed line, so that energy is coupled into the antenna through the feed line (5), and the required dielectric resonator mode is excited.
6. The method of claim 5, wherein: the conformal aqueous dielectric resonator antenna employs side feed.
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| CN201911151193.XA CN110931946A (en) | 2019-11-21 | 2019-11-21 | Conformal aqueous medium resonator antenna and working method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112952386A (en) * | 2021-01-29 | 2021-06-11 | 北京邮电大学 | Wearable antenna |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112952386A (en) * | 2021-01-29 | 2021-06-11 | 北京邮电大学 | Wearable antenna |
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