WO2016119714A1 - Antenne de communication, système d'antenne et dispositif de communication - Google Patents

Antenne de communication, système d'antenne et dispositif de communication Download PDF

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Publication number
WO2016119714A1
WO2016119714A1 PCT/CN2016/072510 CN2016072510W WO2016119714A1 WO 2016119714 A1 WO2016119714 A1 WO 2016119714A1 CN 2016072510 W CN2016072510 W CN 2016072510W WO 2016119714 A1 WO2016119714 A1 WO 2016119714A1
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WO
WIPO (PCT)
Prior art keywords
radiator
communication antenna
radiation
antenna according
power feeding
Prior art date
Application number
PCT/CN2016/072510
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English (en)
Chinese (zh)
Inventor
刘若鹏
陈江波
Original Assignee
深圳光启高等理工研究院
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN201510051987.4A external-priority patent/CN105990659A/zh
Priority claimed from CN201510051984.0A external-priority patent/CN105990658A/zh
Application filed by 深圳光启高等理工研究院 filed Critical 深圳光启高等理工研究院
Publication of WO2016119714A1 publication Critical patent/WO2016119714A1/fr

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • 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

Definitions

  • the present invention relates to an antenna, and more particularly to a communication antenna, and an antenna system and a communication device using the same.
  • Antennas are an integral part of wireless communication systems for transmitting and receiving electromagnetic waves. Antennas are used in systems such as radio and television, point-to-point radio communications, radar and space exploration. With the rapid development of wireless communication technology, the field of antenna technology is becoming more and more extensive. In many special applications, the requirements for antenna performance are also increasing. In modern communications, as the integration of communication systems increases, the required antennas are characterized by high gain, wide band or multi-band, circular polarization, miniaturization, and wide coverage. technical problem
  • the multi-band antenna in the prior art has disadvantages such as a large number of antennas, a complicated structure, a large size, and poor polarization and gain performance.
  • the antenna in some application scenarios, it is desirable for the antenna to have improved axial ratio and pattern performance due to poor large-angle axial ratio and laterality of the antenna in a large-area metal environment.
  • the technical problem to be solved by the present invention is to provide a dual band communication antenna, and further to provide a circularly polarized dual band antenna system.
  • the present invention provides a communication antenna, an antenna system including the antenna, and a communication device including the antenna.
  • the communication antenna provided by the present invention includes: a first radiator, wherein the first radiator includes a first substrate and a first radiation piece disposed on the first substrate, the first radiation piece has a first power feeding portion and Third feeding portion; And a second radiator, wherein the second radiator includes a second substrate and a second radiation sheet disposed on the second substrate, the second radiation sheet having a second power feeding portion and a fourth power feeding portion, wherein the first radiation portion
  • the radiating surface of the sheet and the radiating surface of the second radiating sheet are both convex surfaces, and the first radiating sheet and the second radiating sheet each have a chamfered corner, and the second radiating body is placed in a laminated manner with the first radiating body.
  • the first radiator and the second radiator respectively achieve dual band line polarization.
  • the first radiator and the second radiator operate in the same dual band
  • the first radiator and the second radiator achieve different linear polarization directions.
  • the first radiator is coincident with a geometric center of the second radiator.
  • the first radiation piece and the second radiation piece are each a rectangular shape having a chamfered angle
  • the first radiating sheet has two chamfers on a first diagonal and the second radiating strip has two chamfers on a second diagonal.
  • the first diagonal of the first radiating sheet is at an angle to the second diagonal of the second radiating sheet.
  • the first diagonal of the first radiating sheet and the second diagonal of the second radiating sheet are perpendicular to each other.
  • the first power feeding unit, the second power feeding unit, the third power feeding unit, and the fourth power feeding unit are coaxial power feeding units.
  • the size of the first radiating sheet is larger than the size of the second radiating sheet.
  • the dielectric constant of the second substrate is greater than the dielectric constant of the first substrate.
  • the first radiator and the second radiator are placed in a cavity.
  • the cavity is a circular cavity or a rectangular cavity.
  • a filling material is provided between the first radiator and the second radiator and the cavity.
  • the first substrate and the second substrate are each rectangular.
  • the first substrate and the second substrate are made of a dielectric substrate having a conductive microstructure.
  • the first radiator and the second radiator are electrically insulated from each other.
  • the first power feeding portion and the third power feeding portion are disposed on a first symmetry axis of the first radiation piece, and the second power feeding portion and the The third feeding portion is disposed on a second symmetry axis of the second radiation piece, and the first symmetry axis and the second symmetry axis are perpendicular.
  • the first power feeding portion and the third power feeding portion are located on a horizontal symmetry axis of the first radiation piece and are centrally symmetrical, and the second power feeding portion and the The fourth feeding portion is located on a vertical symmetry axis of the second radiation piece and is centrally symmetrical.
  • the first radiation sheet is disposed on the first substrate
  • the second radiation sheet is disposed on the second substrate
  • the second substrate is disposed on the On the first radiation sheet.
  • a frequency selective radome there is further provided a frequency selective radome, the frequency selective radome being disposed in a radiation direction of the communication antenna.
  • the antenna system includes: a power feeding port; a power splitter, a first input end of the power splitter being connected to the power feeding port; and the method according to any one of claims 1 to 21
  • the communication antenna wherein the power splitter is a four-power splitter, and the first output end of the power splitter is connected to the second power feeder through a first feed line, the power split The second output of the device is connected to the first feed through a second feed line, the third output of the splitter is connected to the fourth feed through a third feed line, and a fourth output end of the power splitter is connected to the third power feeding portion via a fourth power feeding line, wherein the first power feeding line, the second power feeding line, the third power feeding line, and the There is a phase shift between the fourth feed lines.
  • a phase shifter is further disposed between the power splitter and the communication antenna, and the phase shifter makes the second feed line, the third feed line, and the The four feed lines are phase shifted by 90°, 180°, and 270° with respect to the first feed line, respectively.
  • the lengths of the second feed line, the third feed line, and the fourth feed line are respectively different from the length of the first feed line 1/4, 1/2, 3/4 wavelength.
  • the communication device provided by the present invention includes the communication antenna as described above or the antenna system as described above.
  • the present invention has the following significant advantages as compared with the prior art due to the adoption of the above technical solutions: [0034]
  • the communication antenna of the present invention employs two radiators disposed in different planes in a stacked manner, and the size and size of the communication antenna can be reduced.
  • the radiation efficiency can be improved, and the miniaturization and conformal design requirements of the special application environment can be further satisfied.
  • the first radiator and the second radiator may be conformal convex structures, such that The communication antenna can be more compact.
  • the antenna system of the present invention stacks the first radiator by setting the relative positions of the two radiators and the phase shift between the excitation signals fed to the four feeding portions disposed on the two radiators.
  • the second radiator is capable of forming a circularly or elliptically polarized radiation signal.
  • the invention reduces the size, weight and antenna system of the antenna system. cost.
  • the four feeds provided on the two radiators it is also possible to optimize the large-angle axial ratio of the antenna and improve the out-of-roundness of the pattern.
  • FIG. 2 shows a plan view of an exemplary communication antenna structure in accordance with an embodiment of the present invention
  • 3A shows a plan view of an exemplary communication antenna structure with an optional cavity and frequency selective radome, in accordance with an embodiment of the present invention
  • FIG. 3B shows a plan view of another exemplary communication antenna structure with an optional cavity and frequency selective radome in accordance with an embodiment of the present invention
  • FIG. 4 shows a schematic structural diagram of an antenna system according to an embodiment of the present invention
  • FIG. 5A is a graph showing a voltage standing wave ratio of a communication antenna according to an embodiment of the present invention.
  • FIG. 5B is a graph showing a voltage standing wave ratio of an antenna system according to an embodiment of the present invention.
  • FIG. 6A is a diagram showing a gain curve of an antenna system according to an embodiment of the present invention.
  • FIG. 6B is a graph showing a gain curve of an antenna system according to another embodiment of the present invention.
  • FIG. 7A is a graph showing an axial ratio of an antenna system according to an embodiment of the present invention.
  • 7B is a graph showing an axial ratio of an antenna system according to another embodiment of the present invention.
  • FIG. 1A and 1B are schematic perspective structural views showing a schematic diagram of a microstrip communication antenna according to a preferred embodiment of the present invention.
  • 2 shows a plan view of an exemplary communication antenna structure in accordance with an embodiment of the present invention.
  • the communication antenna 200 of the present embodiment is composed of a first radiator 201 and a second radiator 202, wherein the first radiator 201 includes a first substrate 21 and a first radiation sheet 22.
  • the second radiator includes a second substrate 23 and a second radiation sheet 24.
  • the first radiator 201 and the second radiator 202 are disposed on different mounting surfaces. For example, the first radiator 201 and the second radiator 202 may be placed in a stacked manner.
  • the first radiation sheet 22 may be disposed on the first substrate 21, and the second radiation sheet 24 may be disposed on the second substrate 23.
  • the second substrate 23 is disposed on the first radiation sheet 22, in such a manner as to form a laminated structure.
  • the first radiator 201 coincides with the geometric center of the second radiator 202.
  • the laminated structure makes it possible to streamline the design structure, simplify the manufacturing process and save space, and achieve further miniaturization.
  • the substrate is made of a dielectric substrate that is miscellaneous with a conductive microstructure.
  • the radiation sheet is made of a conductive material, for example, made of metal.
  • the radiation sheet may be in the form of a patch or a photolithographically etched coating.
  • the geometry of the first radiating sheet 24 is not limited, and is exemplified as a square in the present embodiment, and may alternatively be a rectangle or other shape.
  • the geometry of the second radiating sheet 24 is also not limited, but is generally selected to be identical to the first radiating sheet 22 (including the same and symmetric conditions).
  • the first radiation sheet 22 has a first power feeding portion 25 and a third power feeding portion 27, and the second radiation sheet 24 has a second power feeding portion 26 and a fourth power feeding portion 28.
  • the first power feeding unit 25, the third power feeding unit 27, the second power feeding unit 26, and the fourth power feeding unit 28 may respectively input signals to be transmitted or output received signals.
  • the first power feeding unit 25, the third power feeding unit 27, the second power feeding unit 26, and the fourth power feeding unit 28 may be coaxial power feeding units.
  • the coaxial feed mode reduces the interference of the feed structure.
  • the first power feeding portion 25 and the third power feeding portion 27 are disposed on a first symmetry axis of the first radiation piece, and the second power feeding portion 26 and the fourth power feeding portion 28 are disposed on a second symmetry axis of the second radiation piece Upper, the first axis of symmetry and the second axis of symmetry are perpendicular.
  • the first power feeding portion 25 and the third power feeding portion 27 are located on the horizontal symmetry axis XI or the vertical symmetry axis Y1 of the first radiation piece 22.
  • the second power feeding portion 26 and the fourth power feeding portion 28 are located on the horizontal symmetry axis X2 or the vertical symmetry axis Y2 of the second radiation piece 24. Referring to FIG.
  • the first power feeding portion 25 and the third power feeding portion 27 are located on the horizontal symmetry axis XI of the first radiation piece 22 and are centrally symmetrical
  • the electric portion 28 is located on the vertical symmetry axis Y2 of the second radiating sheet 24 and is centrally symmetrical.
  • the positions of the four power feeding portions 25, 26, 27, and 28 shown in the drawing are schematic, and the embodiment of the present invention does not limit the first power feeding portion 25 and the third power feeding portion 27 and The relative positions of the two feeding portions 26 and the fourth feeding portion 28 on the horizontal plane (the paper surface in FIG.
  • the embodiment of the present invention does not limit the first power feeding portion 25 and the third power feeding portion 27 and the second power feeding portion 26 and the fourth power feeding portion 28 in the first radiation sheet 22 and the second radiation sheet 24, respectively. Central location.
  • the present invention also contemplates that the mutual positional relationship of the first power feeding portion 25 and the third power feeding portion 27 and the second power feeding portion 26 and the fourth power feeding portion 28 on the radiation sheet thereof may be changed, that is, the first power feeding portion
  • the line connecting the portion 25 and the third feeding portion 27 may be offset from the center of the first radiation piece 22, and the second feed
  • the line connecting the electric portion 26 to the fourth feeding portion 28 may be offset from the center of the second radiating sheet 24.
  • the present invention also contemplates that the four feeders are not in relative position but can be offset overall.
  • the size of the first radiation sheet 22 is larger than the size of the second radiation sheet 24.
  • 2 shows an example in which the size of the first radiation piece 22 is larger than the size of the second radiation piece 24 so that the second radiation piece 24 does not block the first radiation piece 22.
  • the material of the second substrate 23 has a dielectric constant greater than that of the first substrate 21.
  • the size of the first radiating sheet 22 is made larger than that of the second radiating sheet 24 and the dielectric constant of the second substrate 23 is larger than the dielectric constant of the first substrate 21.
  • Each of the first radiating sheet 22 and the second radiating sheet 24 may have a chamfer angle, i.e., cut off some/some of the corners or portions of the material of the radiating sheet.
  • the first radiating strip and the second radiating strip are each dual-band linearly polarized, and the frequency band position of the dual band can be controlled.
  • the first radiating sheet 22 and the second radiating sheet 24 are rectangular radiating sheets each having a hexagonal shape after cutting off two diagonals on one diagonal.
  • the first radiating sheet 22 has chamfers 22a and 22b on both sides of the first diagonal A.
  • the second radiating sheet 24 has cut corners 24a and 24b on both sides of the second diagonal B.
  • the angles of the respective chamfers 22a, 22b, 24a and 24b are selected between 35 and 55 degrees. More preferably, the angles of the respective chamfers 22a, 22b, 24a and 24b are 45 degrees. It can be understood that the chamfer angle can also be other angles. Preferably, all of the chamfers 22a, 22b, 24a and 24b have the same shape.
  • each of the first radiator 201 and the second radiator 202 operates as a linearly polarized ray element.
  • the first radiator 201 and the second radiator 202 are placed such that the first diagonal A and the second diagonal B are at an angle.
  • the first radiator 201 and the second radiator 202 are placed such that the first diagonal A and the second diagonal B are orthogonal to each other. It will be understood that in other embodiments of the invention, the two chamfers of each of the first radiating sheet 22 and the second radiating sheet 24 may not be on the diagonal.
  • each of the first radiator 201 and the second radiator 202 can transmit/receive a dual-band linearly polarized signal, and the first radiator 201 and the second radiation Body 202 can operate in the same dual band. Since the first diagonal A and the second diagonal B are at an angle, the linearly polarized signals of the first radiator 201 and the second radiator 202 can form an elliptical polarization or a circular pole in a phase shift with each other. Radiation signal.
  • the two linear polarizations can be made perpendicular to each other, that is, one is horizontally polarized and one is vertically polarized. , thereby forming a good circularly polarized radiation signal.
  • the excitation signal of the second power feeding portion 26 fed to the second radiator 202 is a reference 0° phase
  • the first power feeding portion 25 has a phase shift of 90° with respect to the second power feeding portion 26, and fourth.
  • the power feeding unit 28 has 180 with respect to the second power feeding unit 26.
  • the third power feeder 27 has 270 with respect to the second power feeder 26. Phase shift.
  • the first radiator 201 and the second radiator 202 are placed such that the first diagonal A and the second diagonal B are orthogonal to each other, in accordance with an embodiment of the present invention.
  • Such an arrangement is such that the linearly polarized waves emitted by the first radiator 201 and the second radiator 202 are orthogonal to each other, for example, the first radiator 201 emits a horizontally polarized wave, and the second radiator 202 emits a vertically polarized wave, and vice versa. Also.
  • the feed network there is a phase shift of 90° or 270° between the excitation signal fed to the first radiator 201 and the excitation signal fed to the second radiator 202, which causes the first radiator 201 and the first
  • the linearly polarized waves emitted by the two radiators 202 are out of phase with each other by 90°.
  • the first radiator 201 and the second radiator 202 emit equal amplitudes and phase differences of 90°, and linearly polarized waves which are spatially orthogonal to each other are combined into circularly polarized waves.
  • the first radiator 201 and the second radiator are realized in a manner in which the first diagonal A and the second diagonal B are orthogonal to each other.
  • the linearly polarized waves of 202 are orthogonal to each other.
  • Polarized waves can be used depending on the specific geometry of the radiation sheets 22 and 24, different placements may be employed as long as the first radiator 201 and the second radiator 202 can emit spatially orthogonal lines. Polarized waves can be used.
  • the first radiator 201 and the second radiator 202 may be made to have a curved surface.
  • the embodiment of the present invention shown in FIG. 1A can make the first radiator 201 and the second radiator 202 have a convex surface.
  • the first substrate 21 and the second substrate 23 are formed to have a convex surface, and then coplanar radiation sheets 22 and 24 are disposed thereon. These structural layers are bonded together due to their similar three-dimensional shape.
  • the embodiment of the present invention shown in FIG. 1B can make the first radiator 201 and the second radiator 202 have a concave surface.
  • the first substrate 21 and the second substrate 23 are formed to have a concave surface, and then the coplanar radiation sheets 22 and 24 are disposed thereon. These structural layers are bonded together due to their similar three-dimensional shape.
  • the convex or concave surface other curved shapes may be used, which may be determined according to specific application scenarios.
  • the communication antenna 200 as described above is compact in structure, and each of the radiation sheets and the substrate can have a conformal structure, which reduces the size of the communication antenna and improves the integration.
  • each radiating sheet can realize dual-band linear polarization, and the first radiating sheet 22 and the second radiating sheet 24 can be controlled as needed.
  • the working frequency band and the linear polarization direction so that a communication antenna 200 can be used to realize the dual-line polarization dual frequency band.
  • the four feeds provided on the two radiators it is possible to optimize the large-angle axial ratio of the antenna and improve the out-of-roundness of the pattern.
  • FIG. 3A and 3B show plan views of an exemplary communication antenna structure with an optional cavity 300 and a frequency selective radome 310, in accordance with a preferred embodiment of the present invention.
  • the communication antenna 200 described in connection with FIG. 1A or FIG. 1B can be placed in the cavity 300.
  • the cavity 300 is gargle in the radiation direction of the communication antenna 100.
  • the functions of the cavity 300 include, but are not limited to, supporting the communication antenna 200, protecting the communication antenna from the surrounding environment, and the effects of human operations.
  • the shape of the cavity 300 is not limited and may be rectangular, square, or circular.
  • the shape of the cavity 300 may or may not correspond to the shape of the first radiator and the second radiator.
  • the first radiator and the second radiator may be rectangular, and the cavity 300 is also rectangular.
  • the first radiator and the second radiator may be rectangular, and the cavity 300 may be circular.
  • the material of the cavity 300 is not limited, and is usually metal, but may also be a non-metallic material suitable for the implementation.
  • the microstrip antenna 200 preferably does not contact the sidewall of the cavity 300.
  • a filler material may be suitably disposed between the cavity 300 and the communication antenna 200 to better function as a fixing, shock absorbing, and/or supporting.
  • a foam fill material may be placed within the cavity 300 to fill the gap between the communication antenna 100 and the cavity 300 to prevent the communication antenna 100 from being unstable in use.
  • the first radiator 201 and the second radiator 202 of the communication antenna 200 and the bottom of the cavity 300 may be conformal convex structures, so that the communication antenna can be more compact.
  • the radome 310 may be disposed in the radiation direction of the communication antenna 200.
  • the radome 310 may be fixed to the substrate of the communication antenna 200 or, in the case of having the cavity 300, may be fixed to the cavity 300 to cover the mouth of the cavity 300.
  • the radome 310 can be configured to conform to the communication antenna 100 and/or the cavity 300 (e.g., convex or concave) to adequately meet the requirements for miniaturization.
  • the radome 310 can also have other shapes, such as a flat shape.
  • the radome 310 can provide protection for the communication antenna 200 and preferably has good wave transmission performance without affecting signal radiation/reception of the communication antenna 200.
  • the radome 310 can be a frequency selective radome 310.
  • Frequency selective radome 310 has Good wave transmission performance and can produce the expected electromagnetic response to control the propagation of electromagnetic waves.
  • FIG. 4 shows a schematic diagram of an antenna system in accordance with an embodiment of the present invention.
  • the antenna system shown in FIG. 4 includes a feed port 410 at the front end, a four-way splitter 420, a first feed line 430a, a second feed line 430b, a third feed line 430c, and a fourth feed line 430d.
  • the feed network of the antenna system includes: a feed port 410, a split four power splitter 420, a first feed line 430a, a second feed line 430b, a third feed line 430c and a fourth feed line 430d.
  • the first feed line 430a and the third feed line 430c are respectively fed into the second feed portion 26 and the fourth feed portion 28, and the second feed line 430b and the fourth feed line 430d are respectively fed into the first The power feeding unit 25 and the third power feeding unit 27. There is a phase shift between the first feed line 430a, the second feed line 430b, the third feed line 430c and the fourth feed line 430d.
  • the second feed line 430b, the third feed line 430c, and the fourth feed may be made by a phase shifter (not shown) disposed in the power splitter 420 and the communication antenna 200.
  • the line 430d is phase-shifted by 90°, 180°, and 270° with respect to the first feed line 430a, respectively.
  • the communication antenna 200 can realize the dual-line polarization dual band by the stacked first radiator 201 and the second radiator 202.
  • the phases of the excitation signals are respectively 90 different by feeding the second power feeding portion 26, the first power feeding portion 25, the fourth power feeding portion 28, and the third power feeding portion 27.
  • a circularly polarized radiation signal can be formed. Therefore, the antenna system of the present invention is capable of achieving dual-band circular polarization. Furthermore, the present invention improves the large angle axis ratio and improves the pattern performance by employing four feed portions as compared with providing only one feed portion on each of the radiation sheets.
  • the lengths of the second feed line, the third feed line, and the fourth feed line may be different from the length of the first feed line by 1/4, 1/, respectively. 2, 3/4 wavelength, the phase of the signal after transmission through these feeder lines is different.
  • the power splitter 420 can adopt a microstrip line power division method to save space and effectively reduce the weight of the system.
  • the communication antenna or antenna system of the above embodiment of the present invention can be incorporated in a communication device to transmit/receive signals for the communication device.
  • 5A is a graph showing a radiation voltage standing wave ratio of a communication antenna according to an embodiment of the present invention, wherein the horizontal axis is the frequency and the vertical axis is the voltage standing wave ratio (VSWR) real part.
  • the voltage standing wave ratio shown in FIG. 5A shows that the communication antenna 200 (or one of the radiators 201 or 202) as shown in FIG. 1 can realize linear polarization dual-band radiation when receiving an excitation signal, It has a good voltage standing wave ratio in both frequency bands
  • FIG. 5B is a graph showing a received voltage standing wave ratio of an antenna system in which the horizontal axis is the frequency and the vertical axis is the real part of the voltage standing wave ratio (VSWR), in accordance with an embodiment of the present invention.
  • the voltage standing wave ratio shown in FIG. 5B shows the output of the communication antenna 200 (including the two antenna radiators) of the antenna system shown in FIG. 4 at the feed port 410 after the signals received by the power divider 420 are merged.
  • the signal has a good voltage standing wave ratio over the entire operating frequency band.
  • FIG. 6A shows a gain graph of an antenna system employing the communication antenna shown in FIG. 1A according to an embodiment of the present invention, wherein the horizontal axis is the pitch angle (degrees) and the vertical axis is the far field gain. As shown, the communication antenna achieves good gain over a range of ⁇ 50° pitch angles in accordance with an exemplary embodiment of the present invention.
  • FIG. 6B shows a gain graph of an antenna system employing the communication antenna shown in FIG. 1B according to an embodiment of the present invention, wherein the horizontal axis is the pitch angle (degrees) and the vertical axis is the far field gain. As shown, the communication antenna achieves good gain over a range of ⁇ 75° pitch angles in accordance with an exemplary embodiment of the present invention.
  • FIG. 7A is a graph showing an axial ratio of an antenna system employing the communication antenna shown in FIG. 1A according to an embodiment of the present invention, wherein the horizontal axis is the azimuth angle (degrees) and the vertical axis is the far-field axis ratio.
  • the axial ratio characterizes the degree of circular polarization of the antenna.
  • the communication antenna according to an exemplary embodiment of the present invention achieves a good circular polarization performance by achieving an axial ratio of 5 or less within an azimuth angle of ⁇ 50°.
  • FIG. 7B is a graph showing an axial ratio of an antenna system employing the communication antenna shown in FIG. 1B according to an embodiment of the present invention, wherein the horizontal axis is the azimuth angle (degrees) and the vertical axis is the far-field axis ratio.
  • the axial ratio characterizes the degree of circular polarization of the antenna.
  • the communication antenna according to an exemplary embodiment of the present invention achieves a good circular polarization performance by achieving an axial ratio of 5 or less in an azimuth angle of ⁇ 75°.
  • the communication antenna in the present invention can achieve dual-band line polarization for each of the radiation sheets by chamfering the radiation sheets. Furthermore, the first radiator and the second radiator can operate in the same dual frequency band. Further, the antenna system of the present invention can laminate the first radiator and the second radiator by shifting the excitation signals fed to the four feeding portions disposed on the two radiators by 90° to each other. It is sufficient to form a circularly polarized or elliptically polarized radiation signal.
  • the invention reduces the size, weight and antenna system of the antenna system. cost. Furthermore, the present invention can improve the large angle axis ratio and improve the pattern performance by employing four feeders.
  • the communication antenna and/or antenna system of the above-described embodiments of the present invention may be incorporated in a communication device.
  • the communication antenna of the present invention can be widely used in various fields of measurement and communication because of its low profile, light weight, small size, easy conformalization, and mass production advantages.
  • the communication antenna of the embodiment of the invention has a wider application range and can be applied to the fields of mobile communication, satellite navigation and the like.
  • the antenna provided by the present invention includes two radiators disposed in different planes in a stacked manner, and circular polarization can be realized by setting the relative positions of the two radiators and the phase shift between the four feeder lines. And dual-band, and can optimize the antenna's large-angle axial ratio and improve the non-circularity of the pattern.
  • each of the radiators with a curved shape (concave or convex)
  • the radiation efficiency can be improved, and the miniaturization and conformal design requirements of the special application environment can be further satisfied.
  • the laminated structure makes it possible to streamline the design structure, simplify the production process and save space for further miniaturization.

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Abstract

La présente invention concerne une antenne de communication, un système d'antenne contenant l'antenne et un dispositif de communication contenant l'antenne. L'antenne de communication comprend : un premier élément rayonnant, le premier élément rayonnant comprenant un premier substrat et une première tôle rayonnante disposée sur le premier substrat, la première tôle rayonnante possédant une première portion d'alimentation et une troisième portion d'alimentation ; et un deuxième élément rayonnant, le deuxième élément rayonnant comprenant un deuxième substrat et une deuxième tôle rayonnante disposée sur le deuxième substrat, la deuxième tôle rayonnante possédant une deuxième portion d'alimentation et une quatrième portion d'alimentation. Une surface de rayonnement de la première tôle rayonnante et une surface de rayonnement de la deuxième tôle rayonnante sont toutes deux des surfaces incurvées, la première tôle rayonnante et la deuxième tôle rayonnante possèdent chacune un angle de tangente, et le deuxième élément rayonnant et le premier élément rayonnant sont empilés.
PCT/CN2016/072510 2015-01-30 2016-01-28 Antenne de communication, système d'antenne et dispositif de communication WO2016119714A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CN201510051987.4A CN105990659A (zh) 2015-01-30 2015-01-30 通信天线、天线系统和通信设备
CN201510051987.4 2015-01-30
CN201510051984.0A CN105990658A (zh) 2015-01-30 2015-01-30 通信天线、天线系统和通信设备
CN201510051984.0 2015-01-30

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WO2016119714A1 true WO2016119714A1 (fr) 2016-08-04

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Citations (6)

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US6995709B2 (en) * 2002-08-19 2006-02-07 Raytheon Company Compact stacked quarter-wave circularly polarized SDS patch antenna
US20060097924A1 (en) * 2004-11-10 2006-05-11 Korkut Yegin Integrated GPS and SDARS antenna
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CN101060203A (zh) * 2007-06-11 2007-10-24 北京航空航天大学 一种改进的双频圆极化高增益层叠微带天线的设计方法
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