CN109687092B - Low-profile omnidirectional circularly polarized antenna - Google Patents
Low-profile omnidirectional circularly polarized antenna Download PDFInfo
- Publication number
- CN109687092B CN109687092B CN201811592872.6A CN201811592872A CN109687092B CN 109687092 B CN109687092 B CN 109687092B CN 201811592872 A CN201811592872 A CN 201811592872A CN 109687092 B CN109687092 B CN 109687092B
- Authority
- CN
- China
- Prior art keywords
- radiator
- circularly polarized
- bottom plate
- low
- profile
- Prior art date
- Legal status (The legal status 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 status listed.)
- Active
Links
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
-
- 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
- H01Q1/42—Housings not intimately mechanically associated with radiating elements, e.g. radome
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
- H01Q19/10—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces
- H01Q19/104—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces using a substantially flat reflector for deflecting the radiated beam, e.g. periscopic antennas
Abstract
A low-profile omnidirectional circularly polarized antenna mainly comprises a reflector plate 2, a radiator 3, a polarizer 4, a bottom plate 5, a support 31, an upper cover body 1 and a lower cover body 6. On one hand, the radiator is arranged in the concave part of the bottom plate, so that the radiator is easy to conform to the metal carrier, the section of the antenna is reduced, and the obtained directional pattern is similar to a monopole antenna on a metal plate and is a horizontal omnidirectional directional pattern; on the other hand, the number and the shape of the gaps on the reflector are adjustable, and the number and the shape of the microstrip lines in the polarizer are adjustable, so that the axial ratio in a specific elevation angle range can be optimized, and different design requirements can be met by optimizing the circular polarization gain in the specific elevation angle range. In summary, the low-profile omnidirectional circularly polarized antenna disclosed by the application has a compact structure, can achieve the assembly effect of small volume and low profile, has the advantages of flexible and adjustable bandwidth, axial ratio and gain, and has a high application value.
Description
Technical Field
The invention relates to the technical field of omnidirectional circularly polarized antennas, in particular to a low-profile omnidirectional circularly polarized antenna.
Background
With the continuous development of communication technology, people have higher and higher requirements on the performance of antennas. At present, ordinary linear polarization antenna has hardly satisfied people's demand, and circular polarization antenna's application is more and more extensive, because circular polarization antenna can accept the incoming wave of arbitrary polarization, has fine rotation orthogonality, the electromagnetic wave of different rotations has the polarization isolation characteristics of great numerical value, in addition, circular polarization wave still has anti-interference, prevent rain fog, anti multipath effect's characteristics, thereby make circular polarization antenna by each aspect such as wide application in communication, radar, satellite positioning, electronic reconnaissance and electronic interference, play huge economic benefits.
For example, circular polarization navigation antennas and communication antennas are used in high-speed flying carriers such as airplanes, and the antennas are required not to affect the aerodynamic performance of the carriers and not to damage the mechanical structure and strength of the carriers. For another example, in astronomical and aerospace communication devices, an omnidirectional circularly polarized antenna is used to reduce signal leakage and effectively eliminate polarization distortion caused by ionosphere faraday rotation effect. Also, on objects which move at high speed, even swing or rotate violently, such as naval vessels, the circularly polarized antenna is beneficial to receive radio signals under any moving state. Therefore, a circularly polarized antenna is required to have an omnidirectional radiation pattern resembling a monopole.
Several existing omnidirectional circular polarization schemes include: (1) the mode of loading the circular polarizer by the monopole has the defects of high height, no conformal carrier and narrow bandwidth; (2) the omnidirectional circularly polarized antenna formed by a plurality of circularly polarized antenna arrays which are rotationally symmetrical around a cylinder has the defects of needing a feed network and large integral size; (3) circular polarization formed by two groups of linear polarization arrays which are spaced by 90 degrees has the defects of array requirement, complex structure and narrow bandwidth. In addition, the existing circularly polarized antenna also has the problems of complex structure and overlarge specification, has a plurality of using defects, and is difficult to meet a plurality of application environments with requirements on the size of the antenna.
Disclosure of Invention
The invention mainly solves the technical problem of how to improve the situation of application limitation caused by complicated structure and overlarge size of the conventional circularly polarized antenna. In order to solve the above technical problem, the present application provides a low-profile omnidirectional circularly polarized antenna, including a reflector plate 2, a radiator 3, a polarizer 4, and a bottom plate 5;
the radiator is arranged on the upper surface of the bottom plate and is used for being connected with a radio frequency line;
the polarizer is arranged at the periphery of the radiator, is fixedly connected to the upper surface of the bottom plate and comprises at least one section of microstrip line;
the reflector plate is arranged on the radiator and isolated from the upper surface of the radiator, and at least one gap is arranged at the edge of the reflector plate.
The upper surface of the base plate is provided with a recess 51 matched with the radiator, and the radiator is provided on the upper surface of the base plate through the recess.
The low-profile omnidirectional circularly polarized antenna further comprises a support member 31, the support member is arranged on the bottom surface of the recess, and the radiator is arranged on the support member.
A through hole 52 is formed on the bottom surface of the recessed portion, and the radio frequency line passes through the through hole and the support member and then is connected to the radiator.
When the microstrip line radiator comprises a plurality of sections of microstrip lines, the sections of microstrip lines are uniformly arranged on the periphery of the radiator;
when the reflective sheet comprises a plurality of gaps, the plurality of gaps are uniformly arranged at the edge of the reflective sheet.
The polarizer comprises twelve microstrip lines which are respectively distributed along one-twelfth circular arc of the radiator, and each section of the microstrip line is inclined along the distribution direction;
the reflector plate comprises twelve gaps, the twelve gaps are distributed along a twelve-quarter circular arc of the reflector plate respectively, and each gap is in a spiral shape, an oblique line shape or a vertical line shape along the distribution direction.
The low-profile omnidirectional circularly polarized antenna further comprises an upper cover body 1 and a lower cover body 6, wherein the upper cover body and the lower cover body are matched to form a protective shell;
a cavity is arranged in the lower cover body, and the bottom plate is fixed in the cavity through a clamping groove arranged on the side wall of the cavity;
the reflector plate is fixed on the inner surface of the upper cover body through screws, and when the upper cover body and the lower cover body are closed, a uniform gap is formed between the reflector plate and the radiator.
The reflector plate is a round metal sheet;
the radiator is a metal disc or a metal cone;
the microstrip line is a strip-shaped metal sheet;
the bottom plate is a metal circular plate;
the support is an annular non-metallic gasket;
the upper cover body and the lower cover body are made of plastic materials.
Diameter R of the reflector platefIs set to 0.4RyTo 1.2RyA distance H between the reflection sheet and the radiatorfSet to M x 0.04 λ to M x 0.06 λ;
diameter R of the radiatorySet to N x 0.24 λ to N x 0.26 λ;
vertical height H of the microstrip linewIs set to 0.8HfTo 1.2Hf；
The diameter R of the concave part on the bottom plated0Set to be N0.28 lambda to N0.32 lambda and depth Hd0Set to be N0.01 lambda to N0.02 lambda, Rd＞Rd0＞RySaid R isdIs the diameter of the bottom plate;
diameter H of the supportnIs set to 0.5Hd0To 1.5Hd0；
Wherein λ is the center frequency wavelength of the antenna, and M, N are integers greater than or equal to 1.
Diameter R of the reflector platefSet to 34mm, thickness DfSet up to 0.5mm, length, the width of every gap set up to 5mm, 0.6mm respectively on the reflector plate, the radiator with interval H between the reflector platefSetting the thickness to be 6 mm;
diameter R of the radiatorySet to 32mm, thickness DySetting the thickness to be 1 mm;
diameter R of the polarizerjSet to be 52mm, and the vertical height H of each section of microstrip line of the polarizerwSet to 6.5mm, thickness to 0.2mm, dielectric constant to 3.5;
diameter R of the base platedSet to 80mm, thickness DdIs provided withIs 4mm, the diameter R of the concave part on the bottom plated0Set to 36mm, depth Hd0The setting is 2 mm;
diameter H of the supportnSet to 20mm, height HnIs set to be 1.5mm and has a thickness DnSet to 1 mm.
The beneficial effect of this application is:
the low-profile omnidirectional circularly polarized antenna according to the above embodiment mainly includes the reflector 2, the radiator 3, the polarizer 4, the bottom plate 5, the supporting member 31, the upper cover 1, and the lower cover 6. On the first hand, because the radiator is arranged in the concave part of the bottom plate, the radiator is easy to conform to the metal carrier, the section of the antenna is reduced, and the obtained directional pattern is similar to a monopole antenna on a metal plate and is a horizontal omnidirectional directional pattern; in the second aspect, when the radiator is arranged as a metal cone, the diameter of the disc can be enlarged within the range of design requirements, so that a wider bandwidth is obtained; in the third aspect, because the number and the shape of the gaps on the reflector are adjustable, and the number and the shape of the microstrip lines in the polarizer are adjustable, the axial ratio in a specific elevation angle range can be optimized, and different design requirements can be met by optimizing the circular polarization gain in the specific elevation angle range; in a fourth aspect, the low-profile omnidirectional circularly polarized antenna disclosed by the application has a compact structure, can achieve the assembly effect of small volume and low profile, has the advantages of flexible and adjustable bandwidth, axial ratio and gain, and has a high application value.
Drawings
Fig. 1 is an exploded view of a low-profile omnidirectional circularly polarized antenna of the present application;
FIG. 2 is a schematic longitudinal cross-sectional view of a low-profile omnidirectional circularly polarized antenna;
FIG. 3 is a schematic structural diagram of a reflector plate;
FIG. 4 is a schematic view of the assembly of the radiator, polarizer and chassis base;
FIG. 5 is a graph of standing wave versus frequency test results;
FIG. 6 is a graph of axial ratio versus angle test results;
fig. 7 is a diagram showing the test results of the circular polarization direction.
Detailed Description
The present invention will be described in further detail with reference to the following detailed description and accompanying drawings. Wherein like elements in different embodiments are numbered with like associated elements. In the following description, numerous details are set forth in order to provide a better understanding of the present application. However, those skilled in the art will readily recognize that some of the features may be omitted or replaced with other elements, materials, methods in different instances. In some instances, certain operations related to the present application have not been shown or described in detail in order to avoid obscuring the core of the present application from excessive description, and it is not necessary for those skilled in the art to describe these operations in detail, so that they may be fully understood from the description in the specification and the general knowledge in the art.
Furthermore, the features, operations, or characteristics described in the specification may be combined in any suitable manner to form various embodiments. Also, the various steps or actions in the method descriptions may be transposed or transposed in order, as will be apparent to one of ordinary skill in the art. Thus, the various sequences in the specification and drawings are for the purpose of describing certain embodiments only and are not intended to imply a required sequence unless otherwise indicated where such sequence must be followed.
The numbering of the components as such, e.g., "first", "second", etc., is used herein only to distinguish the objects as described, and does not have any sequential or technical meaning. The term "connected" and "coupled" when used in this application, unless otherwise indicated, includes both direct and indirect connections (couplings).
In order to facilitate the understanding of the technical solutions of the present application, some technical data will be described herein.
The Axial Ratio of the antenna is defined as the Ratio of the major axis 2A to the minor axis 2B of an ellipse, which is the locus of the end point of the instantaneous electric field vector of an arbitrary polarized wave. The axial ratio is an important performance index of the circularly polarized antenna, the gain difference of the complete machine to signals in different directions can be measured, the gain difference represents the purity of circular polarization, and the bandwidth with the axial ratio not greater than 3dB is defined as the circularly polarized bandwidth of the antenna.
The standing wave ratio of an antenna, which is used to indicate whether the antenna and the radio wave transmitting station are matched, is usually a coefficient without a unit. If the value of the Standing Wave Ratio (SWR) is equal to 1, the electric wave transmitted to the antenna is transmitted completely without any reflection, which is the most ideal case; if the SWR value is larger than 1, it means that a part of the electric wave is reflected back and finally becomes heat, so that the temperature of the feeder line rises, and the reflected electric wave can generate quite high voltage at the output port of the transmitting station, possibly damaging the transmitting station.
Radio frequency lines, separable elements typically attached to cables or equipment for electrical connection of transmission line systems, and in particular, "transmission line systems" may refer to microwave transmission systems.
The radiator refers to a radiation device capable of emitting radiation with a required band width and a certain radiation power.
A polarizer, which is a device for controlling the polarization direction of an antenna feed system (in the case of an antenna radiating electromagnetic waves to the surrounding space), is a signal receiver, and is used to select a specific type of polarization pattern and suppress other types of polarization waves, so as to achieve polarization matching and optimal reception.
The upper and lower terms refer to the orientation terms of the drawings of the present application, such as upper surface, lower surface, upper cover, lower cover, upper and lower, etc., it should be understood by those skilled in the art that the references to "upper" and "lower" are used only for distinguishing the described objects, and do not have the orientation meaning of real space.
The technical solution of the present application will be described with reference to the following examples.
Referring to fig. 1 and 2, the present application discloses a low-profile omnidirectional circularly polarized antenna, which mainly includes a reflector 2, a radiator 3, a polarizer 4 and a bottom plate 5, which will be described separately below.
The radiator 3 is disposed on the upper surface of the chassis base 5 for connecting the radio frequency line L1. The radiator 3 corresponds to a transmitter of a circularly polarized antenna, receives a high frequency electric signal from the radio frequency line L1, and then converts the electric signal into an electromagnetic wave to radiate to space.
The polarizer 4 is disposed at the periphery of the radiator 3, and is fixedly connected to the upper surface of the base plate 5, and includes at least one microstrip line (e.g., microstrip line 41).
The reflective sheet 2 is disposed on the radiator 3, and is isolated from the upper surface of the radiator 3, and at least one slit (e.g., slit 21) is formed at an edge of the reflective sheet 2.
Further, the upper surface of the chassis base 5 is provided with a recess 51 matched with the radiator 3, and the radiator 3 is provided to the upper surface of the chassis base through the recess 51.
Further, the low-profile omnidirectional circularly polarized antenna disclosed in the present application further includes a support 31, the support 31 is disposed on the bottom surface of the recess 51, and the radiator 31 is disposed on the support 31. As can be seen in fig. 2 in particular, the radiator 3 is not in contact with the base plate 5, but is connected by means of a support 31, so that the radiator 3 can be arranged firmly in the recess 51, the radiator 3 being fastened to the support 31 by means of gluing or the like, and the support 3 being fastened to the bottom of the recess 51 by means of gluing or the like.
Further, to achieve a good low profile effect of the antenna, it is preferable to make the upper surface of the radiator 3 flush with the upper surface of the chassis base 5 or even lower than the upper surface of the chassis base 5.
Further, a through hole 52 is formed on the bottom surface of the recess 5, so that the rf line L1 is connected to the radiator 3 after passing through the through hole 52 and the support 31. The connection mode here may include welding, bonding, screwing, clamping, etc., and the specific connection mode is not limited.
Further, when the polarizer 4 includes a plurality of microstrip lines, the plurality of microstrip lines are uniformly disposed on the periphery of the radiator 3. In an embodiment, as shown in fig. 2 and 4, the polarizer 4 includes twelve microstrip lines, the twelve microstrip lines are respectively distributed along a twelfth arc of the radiator 3, and each microstrip line (for example, microstrip line 41) is inclined along the distribution direction. Since twelve segments of microstrip lines spirally surround the periphery of the radiator 3 and are fixed on the bottom plate 5, a uniform inclined spiral distribution state is finally formed, and the fixing mode preferably adopts welding.
Further, when the reflective sheet 2 includes a plurality of slits, the plurality of slits are uniformly disposed at the edge of the reflective sheet 2. In one embodiment, as shown in fig. 3, the reflector 2 includes twelve slits, the twelve slits are respectively distributed along a twelve-quarter arc of the reflector 2, and each slit (e.g., slit 21) is spiral, oblique or vertical along the distribution direction. Preferably, each slit is arranged in a diagonal shape such that an angle of 30 degrees is formed between every two adjacent slits.
Further, referring to fig. 1, the low-profile omnidirectional circularly polarized antenna disclosed by the present application further includes an upper cover 1 and a lower cover 6, where the upper cover 1 and the lower cover 6 are used to form a protective housing in a matching manner, so that the low-profile circularly polarized antenna can protect the internally mounted reflector plate 2, the radiator 3, the polarizer 4, and the bottom plate 5, and can also form an appearance of a product suitable for an application.
Wherein, be equipped with the cavity in the lower lid 6, bottom plate 5 is fixed in the cavity through the draw-in groove (for example 61) that sets up on the cavity lateral wall. The reflection sheet 2 is provided with a through hole through which a screw 22 is passed so that the reflection sheet 2 is fixed to the inner surface of the upper cover 1. As shown in fig. 2, when the upper cover 1 and the lower cover 6 are closed, a uniform gap is formed between the reflector 2 and the radiator 3.
In a specific embodiment, the fastening grooves 61 on the bottom plate 5 are internal thread connecting posts matched with screws or threaded rods, the four fastening grooves are uniformly arranged on the side wall of the cavity, meanwhile, the bottom plate 5 is provided with fastening holes (for example, fastening holes 52) matched with the fastening grooves, and the upper cover plate 1 is provided with screw holes (for example, screw holes 11) matched with the fastening grooves, so that when the upper cover body 1 and the lower cover body 6 are closed, the bottom plate 6 can be fixed in the cavity of the lower cover body 6 through the fastening holes 53, and the screws can be screwed into the fastening grooves 61 through the screw holes 11.
In one embodiment, the lower cover 6 has a circumferential edge on its side flush with the lower surface, and the circumferential edge has a plurality of uniformly distributed through holes, according to which the lower cover 6 can be easily fixed to an object such as a wall, ceiling, floor, launcher, etc.
Further, the reflection sheet 2 is a circular metal thin plate, and a plurality of slits such as the slits 21 are obtained by the slit process. The radiator 3 is a metal disc or a metal cone, if the radiator is the metal disc, a uniform gap is formed between the reflector plate 2 and the radiator 3, and if the radiator is the metal cone, a gap structure which is gradually reduced towards the center is formed between the reflector plate 2 and the radiator 3; the radiator in the form of a metal disc is preferably chosen in this embodiment. Each microstrip line in the polarizer 4 is a strip-shaped metal sheet, and as shown in fig. 2 and 4, the strip-shaped metal sheets are sequentially welded on the bottom plate 5. The bottom plate 5 is a circular metal plate, and has recesses 51 and through holes 52 formed in the upper surface thereof by a drilling and etching process, and a plurality of uniformly distributed chucking holes such as chucking holes 53 formed in the edge thereof. The support 31 is an annular non-metallic gasket, such as an annular gasket made of rubber or plastic. The upper cover body 1 and the lower cover body 2 are made of plastic materials.
In another embodiment, the upper cover body 1 is embedded with a metal plate on the inner surface thereof, and the reflector plate 2 is obtained on the metal plate through an engraving process, so that the reflector plate 2 and the upper cover body 1 have the process characteristics of integral molding, thereby eliminating the screws 22 and improving the assembly efficiency.
In another embodiment, a metal plate is embedded in the inner cavity of the lower cover 6, and the bottom plate 5 is obtained on the metal plate through an engraving process, so that the bottom plate 5 and the lower cover 6 have the process characteristics of integral molding, and the assembly efficiency can be improved.
In order to enable the omnidirectional circularly polarized antenna to have a good low-profile assembly effect and a broadband and omnidirectional circularly polarized performance effect, the size parameters of all the components are set.
In one embodiment, the diameter R of the reflector plate 2fIs set to 0.4RyTo 1.2RyDistance H between reflector plate 2 and radiator 3fSet to M x 0.04 λ to M x 0.06 λ; diameter R of the radiator 3ySet to N x 0.24 λ to N x 0.26 λ; vertical height H of microstrip line 41wIs set to 0.8HfTo 1.2Hf(ii) a Diameter R of recess 51 in bottom plate 5d0Set to be N0.28 lambda to N0.32 lambda and depth Hd0Set to be N0.01 lambda to N0.02 lambda, Rd＞Rd0＞RyHerein R isdIs the diameter of the bottom plate 5; diameter H of the support 31nIs set to 0.5Hd0To 1.5Hd0. It should be noted that λ is the center frequency wavelength of the antenna, and M, N are integers greater than or equal to 1, and are selected according to the size requirement of the user for the antenna.
In one embodiment, the diameter R of the reflector plate 2 is adjustedfSet to 34mm, thickness DfSetting the length and the width of each gap on the reflector plate 2 as 0.5mm, respectively setting the length and the width of each gap on the reflector plate 2 as 5mm and 0.6mm, and setting the distance H between the radiator 3 and the reflector plate 2fSet to 6 mm. Diameter R of radiator 3ySet to 32mm, thickness DySet to 1 mm. Diameter R of polarizer 4jSet to 52mm, and set the vertical height H of each microstrip line of the polarizer 4wSet at 6.5mm, set at 0.2mm thickness and set at 3.5 dielectric constant. The diameter R of the bottom plate 5dSet to 80mm, thickness DdSet to 4mm, the diameter R of the concave part 51 on the bottom plated0Set to 36mm, depth Hd0Set to 2 mm. Diameter H of the support 31nSet to 20mm, height HnIs set to be 1.5mm and has a thickness DnSet to 1 mm.
To further illustrate the practical performance of the low-profile omnidirectional circularly polarized antenna of the present application, the antenna is designed with the specific dimensions disclosed above and the simulation results shown in fig. 5-7 are obtained.
As shown in FIG. 5, the impedance bandwidth of the antenna is 33.56GHz-36.14GHz with a relative bandwidth of 8% based on the voltage standing wave ratio of less than 2.
As shown in fig. 6, the axial ratio index of the antenna. It can be seen that the numerical value of the axial ratio varies depending on the angle of the polarized wave, and specific data corresponding to the X, Y axis at m1-m5 are enumerated. It has been found that an axial ratio of less than about 45 degrees in the 10dB range performs well at low elevation angles, primarily near the horizon, which is compatible with the requirement for high omni-directional coverage with high gain in the horizontal direction for omni-directional antennas.
As shown in fig. 7, the radiation direction of the antenna is shown, wherein specific data corresponding to the angle (Theta), the minimum available gain (Ang) and the maximum available gain (Mag) at m1-m6 are listed. It can be seen that the circularly polarized gain of the antenna is greater than 0dB from 0 degree elevation to 50 degrees elevation, wherein the circularly polarized gain is greater than 2dB from 10 degrees elevation to 40 degrees elevation, and the highest gain is 4.8 dB.
As can be seen from the simulation results of fig. 5-7, the low-profile circularly polarized antenna claimed in the present application has a wider standing wave bandwidth, a better low elevation circular polarization performance, and a higher low elevation circular polarization gain.
The present invention has been described in terms of specific examples, which are provided to aid understanding of the invention and are not intended to be limiting. For a person skilled in the art to which the invention pertains, several simple deductions, modifications or substitutions may be made according to the idea of the invention.
Claims (9)
1. A low-profile omnidirectional circularly polarized antenna is characterized by comprising a reflector plate (2), a radiator (3), a polarizer (4) and a bottom plate (5);
the radiator is arranged on the upper surface of the bottom plate and is used for being connected with a radio frequency line;
the polarizer is arranged at the periphery of the radiator, is fixedly connected to the upper surface of the bottom plate and comprises at least one section of microstrip line;
the reflector plate is arranged on the radiator and isolated from the upper surface of the radiator, and at least one gap is arranged at the edge of the reflector plate; the reflector plate is a circular metal sheet, the radiator is a metal cone, and a gap structure gradually reduced towards the center is formed between the reflector plate and the radiator;
when the polarizer comprises a plurality of sections of microstrip lines, the plurality of sections of microstrip lines are uniformly arranged on the periphery of the radiator and form a uniform inclined spiral distribution state; when the reflecting sheet comprises a plurality of gaps, the plurality of gaps are uniformly arranged at the edge of the reflecting sheet;
the upper surface of bottom plate is equipped with the depressed part (51) that the radiator matches, the radiator pass through the depressed part is set up in the upper surface of bottom plate, the upper surface of radiator with the upper surface of bottom plate is the same level or is less than the upper surface of bottom plate.
2. The low-profile, omnidirectional circularly polarized antenna according to claim 1, further comprising a support member (31) disposed on a bottom surface of said recess, said radiator being disposed on said support member.
3. A low-profile, omni-directional, circularly polarized antenna according to claim 2, wherein a through hole (52) is formed on the bottom surface of the recess, and the rf line passes through the through hole and the support member and then is connected to the radiator.
4. The low-profile, omnidirectional circularly polarized antenna of claim 1,
the polarizer comprises twelve microstrip lines which are respectively distributed along one-twelfth circular arc of the radiator, and each section of the microstrip line is inclined along the distribution direction;
the reflector plate comprises twelve gaps, the twelve gaps are distributed along one-twelfth circular arc of the reflector plate respectively, and each gap is in a spiral shape, an oblique line shape or a vertical line shape along the distribution direction.
5. A low-profile, omnidirectional circularly polarized antenna according to claim 4, further comprising an upper cover (1) and a lower cover (6) adapted to cooperate to form a protective enclosure;
a cavity is arranged in the lower cover body, and the bottom plate is fixed in the cavity through a clamping groove arranged on the side wall of the cavity;
the reflector plate is fixed on the inner surface of the upper cover body through screws, and when the upper cover body and the lower cover body are closed, a uniform gap is formed between the reflector plate and the radiator.
6. The low-profile, omnidirectional circularly polarized antenna of claim 2,
the microstrip line is a strip-shaped metal sheet;
the bottom plate is a metal circular plate;
the support piece is an annular non-metal gasket.
7. The low-profile, omnidirectional circularly polarized antenna of claim 5, wherein said upper cover and said lower cover are both plastic.
8. The low-profile, omnidirectional circularly polarized antenna of claim 6,
diameter R of the reflector platefIs set to 0.4RyTo 1.2RyA distance H between the reflection sheet and the radiatorfSet to M x 0.04 λ to M x 0.06 λ;
diameter R of the radiatorySet to N x 0.24 λ to N x 0.26 λ;
vertical height H of the microstrip linewIs set to 0.8HfTo 1.2Hf；
The diameter R of the concave part on the bottom plated0Set to be N0.28 lambda to N0.32 lambda and depth Hd0Set to be N0.01 lambda to N0.02 lambda, Rd＞Rd0＞RySaid R isdIs the diameter of the bottom plate;
diameter H of the supportnIs set to 0.5Hd0To 1.5Hd0；
Wherein λ is the center frequency wavelength of the antenna, and M, N are integers greater than or equal to 1.
9. The low-profile, omnidirectional circularly polarized antenna of claim 8,
diameter R of the reflector platefSet to 34mm, thickness DfSet to 0.5mm, soThe length and the width of each gap on the reflector plate are respectively set to be 5mm and 0.6mm, and the distance H between the radiator and the reflector platefSetting the thickness to be 6 mm;
diameter R of the radiatorySet to 32mm, thickness DySetting the thickness to be 1 mm;
diameter R of the polarizerjSet to be 52mm, and the vertical height H of each section of microstrip line of the polarizerwSet to 6.5mm, thickness to 0.2mm, dielectric constant to 3.5;
diameter R of the base platedSet to 80mm, thickness DdSet to be 4mm, the diameter R of the concave part on the bottom plated0Set to 36mm, depth Hd0The setting is 2 mm;
diameter H of the supportnSet to 20mm, height HnIs set to be 1.5mm and has a thickness DnSet to 1 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811592872.6A CN109687092B (en) | 2018-12-25 | 2018-12-25 | Low-profile omnidirectional circularly polarized antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811592872.6A CN109687092B (en) | 2018-12-25 | 2018-12-25 | Low-profile omnidirectional circularly polarized antenna |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109687092A CN109687092A (en) | 2019-04-26 |
| CN109687092B true CN109687092B (en) | 2020-12-01 |
Family
ID=66189426
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811592872.6A Active CN109687092B (en) | 2018-12-25 | 2018-12-25 | Low-profile omnidirectional circularly polarized antenna |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109687092B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113972483A (en) * | 2021-11-26 | 2022-01-25 | 四川九洲电器集团有限责任公司 | Millimeter wave circularly polarized omnidirectional antenna |
| CN113851835B (en) * | 2021-12-01 | 2022-03-11 | 陕西海积信息科技有限公司 | Horizontal omnidirectional circularly polarized antenna |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016139850A (en) * | 2015-01-26 | 2016-08-04 | 日本放送協会 | Antenna device, receiving device and reflector antenna device |
| CN107910648A (en) * | 2017-11-01 | 2018-04-13 | 山西大学 | A kind of low section double frequency-band omnidirectional circular-polarized antenna |
| CN207818899U (en) * | 2018-01-31 | 2018-09-04 | 南京濠暻通讯科技有限公司 | Minimize low section dual-polarization omnidirectional antenna |
| CN108829988A (en) * | 2018-06-22 | 2018-11-16 | 西安电子科技大学 | A kind of hexagon circular polarized antenna array and its fast Optimization |
| CN208272118U (en) * | 2018-03-08 | 2018-12-21 | 广东通宇通讯股份有限公司 | Ultra wide band horizontally polarized omnidirectional antenna |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3932876A (en) * | 1974-08-09 | 1976-01-13 | Rca Corporation | Short end-fire circularly polarized antenna |
| CN102332635B (en) * | 2010-04-07 | 2013-12-25 | 庄昆杰 | Small-sized multi-band and high-grain dual polarization microstrip antenna at microwave low band |
| CN104319467B (en) * | 2014-10-14 | 2019-02-05 | 陕西海通天线有限责任公司 | Five frequency range subscriber computer antennas of compatible Beidou and GPS function |
| CN106329156B (en) * | 2016-09-23 | 2019-03-05 | 西安电子科技大学 | A kind of novel double-frequency dual-polarization omnidirectional antenna |
| US11050160B2 (en) * | 2017-04-17 | 2021-06-29 | University Of Massachusetts | Planar-shaped antenna devices, antenna arrays, and fabrication |
| CN107275774A (en) * | 2017-06-22 | 2017-10-20 | 山西大学 | A kind of low section omnidirectional circular-polarized antenna of wide axle than wave beam |
-
2018
- 2018-12-25 CN CN201811592872.6A patent/CN109687092B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016139850A (en) * | 2015-01-26 | 2016-08-04 | 日本放送協会 | Antenna device, receiving device and reflector antenna device |
| CN107910648A (en) * | 2017-11-01 | 2018-04-13 | 山西大学 | A kind of low section double frequency-band omnidirectional circular-polarized antenna |
| CN207818899U (en) * | 2018-01-31 | 2018-09-04 | 南京濠暻通讯科技有限公司 | Minimize low section dual-polarization omnidirectional antenna |
| CN208272118U (en) * | 2018-03-08 | 2018-12-21 | 广东通宇通讯股份有限公司 | Ultra wide band horizontally polarized omnidirectional antenna |
| CN108829988A (en) * | 2018-06-22 | 2018-11-16 | 西安电子科技大学 | A kind of hexagon circular polarized antenna array and its fast Optimization |
Non-Patent Citations (1)
| Title |
|---|
| 一种紧凑型全向圆极化天线;张光生，何小煜，俞钰峰;《通信对抗》;20140630;第33卷(第2期);第44-47页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109687092A (en) | 2019-04-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6034638A (en) | Antennas for use in portable communications devices | |
| US9024831B2 (en) | Miniaturized ultra-wideband multifunction antenna via multi-mode traveling-waves (TW) | |
| CA1322046C (en) | Monopole/l-shaped parasitic elements for circularly/elliptically polarized wave transceiving | |
| US11652288B2 (en) | Antenna | |
| JPH05218729A (en) | Microstrip-patch-antenna structure | |
| EP3828998B1 (en) | Terminal device | |
| US6018327A (en) | Single-wire spiral antenna | |
| KR20110005258A (en) | Circularly polarized loop reflector antenna and associated methods | |
| KR20110107348A (en) | Compact circularly polarized omni-directional antenna | |
| CN106129593A (en) | A kind of all-metal Phased Array Radar Antenna unit of two dimension wide angle scanning | |
| CN109687092B (en) | Low-profile omnidirectional circularly polarized antenna | |
| JP2019536317A (en) | Single-layer shared aperture dual-band antenna | |
| EP3828999A1 (en) | Terminal device | |
| CN108539429B (en) | Broadband omnidirectional oblique polarization antenna for metal carrier | |
| US11121473B2 (en) | Compact cavity-backed discone array | |
| US7852277B2 (en) | Circularly polarized horn antenna | |
| US10777872B1 (en) | Low profile communications antennas | |
| JPH06291538A (en) | Microwave polarization lens device | |
| US5877729A (en) | Wide-beam high gain base station communications antenna | |
| CN220553598U (en) | Antenna unit, antenna and base station | |
| CN215644947U (en) | Miniature missile-borne microstrip conformal navigation antenna | |
| CN110829035B (en) | Circular polarization patch antenna of wide half-power wave beam | |
| EP3874561B1 (en) | Dual polarized antenna structure | |
| JPH04216204A (en) | Circularly polarized wave antenna system | |
| WO2022017576A1 (en) | An antenna device with improved radiation directivity |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |