CN115714269A - Low-profile miniaturized broadband omnidirectional vertical polarization slot antenna - Google Patents
Low-profile miniaturized broadband omnidirectional vertical polarization slot antenna Download PDFInfo
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Abstract
The embodiment of the invention discloses a low-profile miniaturized broadband omnidirectional vertical polarization slot antenna, which comprises: the dielectric plate is arranged on the top of the metal radiator and is contacted with the metal radiator, and the metal radiator is contacted with the metal layer of the dielectric plate; a gap is formed in the side wall of the metal radiator, and an omnidirectional vertical polarization radiation mode is formed through equivalent magnetic current radiation of the gap; the metal feed probe comprises an inner conductor and an outer conductor of a coaxial structure; the metal housing is internally provided with a metal cavity in a round table shape, the inner conductor is connected with the bottom of the metal housing, the antenna radiator is arranged in the metal cavity, the outer conductor penetrates through the metal radiator, the top end of the outer conductor is abutted to and contacted with the metal layer of the dielectric plate, and the antenna housing is formed by fixedly connecting the dielectric plate with the assembling surface of the round table-shaped housing. The technical scheme provided by the embodiment of the invention solves the problems that the existing omnidirectional antenna is complex in structural form and is difficult to realize more functions on one structure.
Description
Technical Field
The invention relates to the technical field of microwave and antenna, in particular to wireless communication equipment of an aerospace vehicle, and particularly relates to a low-profile miniaturized broadband omnidirectional vertical polarization slot antenna.
Background
With the progress of technology and the accompanying industrial upgrading, the demand for communication is also gradually increasing. Modern communications have increasingly stringent antenna requirements, and increasingly demand for communication devices to have wider and smaller bandwidths. When the antenna is installed on a special carrying platform such as an aircraft or a ship, the requirements of light weight, small size, low profile and the like of the antenna are required to be met while the performance of the antenna is ensured due to the limitation of an assembly space. Because the radiation energy of the omnidirectional antenna can form omnidirectional coverage in a horizontal plane, the omnidirectional antenna has wide application in short-wave communication, calibration communication and missile-borne communication.
At present, the common omnidirectional antenna is a symmetric dipole antenna, and many scholars and experts at home and abroad research the antenna and the variant forms thereof. The symmetric array is limited to be a resonant antenna, the bandwidth is narrow, the surface current distribution on the symmetric array can be changed in a loading mode to obtain broadband characteristics, but the system complexity is increased and the design difficulty is increased due to the loading; other antennas that can produce an omni-directional radiation pattern such as an Alford loop antenna and variants thereof, a combination loop antenna, a rotating field antenna, etc.; the antenna forms listed above need to be designed in such a way that both the low profile characteristic and the broadband characteristic and the omnidirectional vertical polarization radiation pattern are ensured, the adopted mode is complicated, and it is difficult to realize more functions on one structure.
In view of this limitation, the present invention is based on a slot structure, and aims to realize a vertically polarized omnidirectional antenna in a simple manner, and the antenna unit has advantages of miniaturization, low profile, broadband, and the like.
Disclosure of Invention
The purpose of the invention is as follows: the embodiment of the invention provides a low-profile miniaturized broadband omnidirectional vertical polarization slot antenna, which aims to solve the problems that the structural form of the antenna is complicated and more functions are difficult to realize on one structure because the low-profile characteristic is considered and the broadband characteristic and the omnidirectional vertical polarization radiation mode need to be ensured in the conventional omnidirectional antenna form.
The technical scheme of the invention is as follows: the embodiment of the invention provides a low-profile miniaturized broadband omnidirectional vertical polarization slot antenna, which comprises: an antenna radiator, a radiation feed body, a metal shell and an antenna housing;
the antenna radiator adopts a metal radiator 2 with a cylindrical structure; the circular dielectric plate 1 is arranged on the top of the metal radiator 2 and is contacted with the metal radiator, and the metal radiator 2 is contacted with the metal layer of the dielectric plate 1; a gap is formed in the cylindrical side wall of the metal radiator 2, and an omnidirectional vertical polarization radiation mode is formed through equivalent magnetic current radiation of the gap; a metal feed probe 3 is adopted as the radiation feeder, and the metal feed probe 3 comprises an inner conductor and an outer conductor which are of a coaxial structure;
the metal casing 4 wholly sets up to the round platform form, inside is formed with the metal cavity of round platform form, the assembly face of antenna radiator is seted up on the top, the bottom fixed connection of the inner conductor bottom of metal feed probe 3 and the bottom of round platform form metal casing 4, inside the metal cavity was arranged in to whole antenna radiator, make the outer conductor of metal feed probe 3 pass metal radiator 2, and the top supports with the metal level of dielectric plate 1 and leans on the contact, and through the assembly face fixed connection of dielectric plate 1 with round platform form casing 4, form the antenna house.
Alternatively, in a low profile miniaturized wideband omni-directional vertically polarized slot antenna as described above,
a pair of gaps in the horizontal direction are formed in the cylinder side wall of the metal radiator 2 with the cylindrical structure along the circumferential direction, and the positions and the structures of the pair of gaps are kept to be symmetrically arranged, so that an omnidirectional mode is formed by adopting gap equivalent magnetic current, and the polarization mode is vertical polarization;
the top end of the metal radiator 2 with the cylindrical structure is specifically contacted with the metal layer of the dielectric slab 1;
the bottom end of the metal radiator 2 with the cylindrical structure is fixedly connected with the bottom of the metal shell 4.
Alternatively, in the low profile miniaturized wideband omni-directional vertically polarized slot antenna described above,
the dielectric plate 1 is a PCB double-layer plate, copper is coated on one side of a contact surface of the metal radiator 2, the metal layer is formed in the middle of the bottom end face of the dielectric plate 1, and the metal layer is in contact with the top end of a cylinder of a cylindrical slotted structure in the metal radiator 2.
Alternatively, in the low profile miniaturized wideband omni-directional vertically polarized slot antenna described above,
and an annular groove structure is arranged at the position of the contact surface of the metal layer of the dielectric plate 1 and the metal radiator 2, and the interior of the annular groove is metallized.
Alternatively, in the low profile miniaturized wideband omni-directional vertically polarized slot antenna described above,
the periphery of the assembly surface at the top end of the metal shell 4 forms a concave ring structure, and the dielectric plate 1 is integrally covered on the concave ring structure of the assembly surface and fixedly connected with the assembly surface through screws.
Alternatively, in the low profile miniaturized wideband omni-directional vertically polarized slot antenna described above,
in the metal feed probe 3, a radio frequency joint is used as an inner conductor, a cylindrical metal conductor with a diameter larger than that of the radio frequency joint is used as an outer conductor, a hole is formed in the bottom end face of the cylindrical metal conductor, and the radio frequency joint is inserted into the cylindrical metal conductor to form the metal feed probe 3 with a coaxial structure;
the top of the outer conductor in the metal feed probe 3 is directly contacted with the metal layer of the dielectric plate 1, the bottom end of the radio frequency connector is provided with a flange plate, and the flange plate is provided with a fixing hole for fixedly connecting the radio frequency connector with the bottom center boss of the truncated cone-shaped metal shell 4 through a screw.
Alternatively, in the low profile miniaturized wideband omni-directional vertically polarized slot antenna described above,
a nonmetal annular region 7 is arranged on the metal layer of the dielectric plate 1 and used for forming broadband impedance matching; and a blind slot 8 and a metallized blind hole are formed on the dielectric plate 1, so that the metal feed probe 3 is deep into the dielectric plate 1 to form a nested structure.
Alternatively, in the low profile miniaturized wideband omni-directional vertically polarized slot antenna described above,
the edge of the metal radiator 2 and the edge of the cylindrical side wall of the metal radiator 2, which is provided with the gap, are all subjected to smoothing treatment.
10. The low profile miniaturized wideband omni-directional vertically polarized slot antenna according to any one of claims 1 to 6,
the round table-shaped metal shell 4 is formed by hollowing out cylindrical metal, and an annular skirt edge is arranged on the periphery of the metal shell 4 and used for conformally mounting the low-profile miniaturized broadband omnidirectional vertical polarization slot antenna and the carrying platform through the annular skirt edge.
The invention has the beneficial effects that: compared with the existing vertical polarization omnidirectional antenna, the low-profile miniaturized broadband omnidirectional vertical polarization slot antenna has the advantages of novel design, simple and compact structure, capability of obtaining a broadband, low-profile and vertical polarization omnidirectional radiation mode through slotting operation on a simple structure, easiness in conformal installation with a carrying platform due to the fact that the antenna structure is arranged in a low-profile cavity formed by a metal shell 4. In addition, the omnidirectional vertical polarization slot antenna is easy to process, simple in material, suitable for popularization and capable of greatly reducing design complexity and processing cost and achieving low profile and broadband characteristics through a simpler technical means. Furthermore, the design structure of the omnidirectional vertical polarization slot antenna provided by the embodiment of the invention can be expanded to realize omnidirectional radiation modes such as dual-frequency and even multi-frequency, vertical and horizontal dual polarization and the like; the antenna is beneficial to reducing the cost of the antenna, lightening the load bearing burden of a wireless communication system and realizing the miniaturization and the multiple functions of the communication system.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the example serve to explain the principles of the invention and not to limit the invention.
Fig. 1 is a top view of a low-profile miniaturized wideband omnidirectional vertically polarized slot antenna according to an embodiment of the present invention;
fig. 2 is an exploded view of a three-dimensional structure of a low-profile miniaturized wideband omnidirectional vertically polarized slot antenna provided in an embodiment of the present invention;
fig. 3 is a schematic structural diagram of an interposer of a low-profile miniaturized wideband omnidirectional vertical polarization slot antenna according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a radiation feeder in a low-profile miniaturized wideband omnidirectional vertically polarized slot antenna according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a circular truncated cone-shaped metal shell in a low-profile miniaturized wideband omnidirectional vertical polarization slot antenna provided in an embodiment of the present invention;
fig. 6 is a schematic diagram of a low-profile miniaturized wideband omnidirectional vertically polarized slot antenna provided by an embodiment of the present invention mounted on a metal tray;
FIG. 7 is a schematic diagram of an antenna standing-wave ratio simulation curve for the low-profile miniaturized wideband omni-directional vertically polarized slot antenna provided in the embodiment of FIG. 1 of the present invention;
fig. 8a is a simulation diagram of different pitch angle gain distributions of the omnidirectional vertically polarized slot antenna in the horizontal plane according to the embodiment of the present invention shown in fig. 1; in fig. 8a, the pitch angle is 60 °,70 °,80 °,90 °; the frequency is 0.95GHz;
FIG. 8b is a simulation diagram of different pitch angle gain distributions in the horizontal plane for the omnidirectional vertically polarized slot antenna provided in the embodiment of FIG. 1; in fig. 8b the pitch angle is 60 °,70 °,80 °,90 °; the frequency is 1.1GHz;
fig. 8c is a simulation diagram of different pitch angle gain distributions of the omnidirectional vertically polarized slot antenna in the horizontal plane according to the embodiment of the present invention shown in fig. 1; in fig. 8c the pitch angle is 60 °,70 °,80 °,90 °; the frequency was 1.25GHz.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.
As described in the above background art, the conventional omni-directional antenna needs to ensure broadband characteristics and omni-directional vertical polarization radiation mode while considering low profile characteristics, and the antenna structure adopted is complex and it is difficult to implement multiple functions on one structure.
In view of the above problems in the form of omnidirectional antennas, embodiments of the present invention provide a low-profile miniaturized wideband omnidirectional vertically polarized slot antenna, which is based on a slot structure and aims to implement a vertically polarized omnidirectional antenna in a simple manner, and the antenna unit has the advantages of miniaturization, low profile, wideband, and the like.
The following specific embodiments of the present invention may be combined, and the same or similar concepts or processes may not be described in detail in some embodiments.
Fig. 1 is a top view of a low-profile miniaturized wideband omnidirectional vertically polarized slot antenna according to an embodiment of the present invention; fig. 2 is an exploded view of a three-dimensional structure of the low-profile miniaturized wideband omni-directional vertically polarized slot antenna provided in the embodiment of the present invention in fig. 1. Referring to fig. 1 and 2, a low-profile miniaturized wideband omnidirectional vertical polarization slot antenna according to an embodiment of the present invention includes: an antenna radiator, a radiation feed, a metal housing and an antenna cover.
Referring to the structure of the omnidirectional vertically polarized slot antenna shown in fig. 1 and 2, the antenna radiator is a metal radiator 2 with a cylindrical structure, a circular dielectric plate 1 is arranged on the top of the metal radiator 2 and is in contact with the metal radiator 2, and the metal radiator 2 is in contact with the metal layer of the dielectric plate 1; a gap is formed in the cylindrical side wall of the metal radiator 2, and an omnidirectional vertical polarization radiation mode is formed through equivalent magnetic current radiation of the gap; a metal feed probe 3 is used as the radiation feeder, the metal feed probe 3 comprising an inner conductor and an outer conductor of a coaxial structure.
As shown in fig. 2, the metal housing 4 is integrally formed into a truncated cone shape, a truncated cone-shaped metal cavity is formed inside the metal housing, and the top end of the metal housing is provided with an assembly surface of the antenna radiator, the bottom end of the inner conductor of the metal feed probe 3 is fixedly connected with the bottom of the truncated cone-shaped metal housing 4, and the whole antenna radiator is arranged inside the metal cavity, so that the outer conductor of the metal feed probe 3 passes through the metal radiator 2, and the top end of the metal feed probe abuts against and contacts the metal layer of the dielectric plate 1, and is fixedly connected with the assembly surface of the truncated cone-shaped metal housing 4 through the dielectric plate 1, thereby forming the antenna housing.
In the embodiment of the present invention, the whole structure of the omnidirectional vertically polarized slot antenna formed by the antenna radiator, the radiation feeder, the metal housing and the antenna housing may be installed on a larger metal tray 5, as shown in fig. 2, where the metal tray 5 is, for example, a carrying platform of the omnidirectional vertically polarized slot antenna.
In an implementation manner of the embodiment of the present invention, as shown in fig. 2, the omnidirectional vertically polarized slot antenna provided in the embodiment of the present invention forms an omnidirectional vertically polarized radiation mode by using equivalent magnetic current radiation of a slot. Since the single gap is bidirectional radiation, in order to complete the omnidirectional radiation mode, a pair of gaps in the horizontal direction are formed on the cylinder side wall of the metal radiator 2 with the cylindrical structure along the circumferential direction, and the positions and the structures of the pair of gaps are kept to be symmetrically arranged.
The metal radiator 2 that provides among this implementation goes up side wall slot structure, not only promotes the symmetry of whole structure, and is favorable to out of roundness characteristic, does benefit to the omnidirectional radiation mode promptly.
In the specific implementation, the top end of the metal radiator 2 with a cylindrical structure is specifically contacted with the metal layer of the dielectric slab 1; the bottom end of the cylinder is fixedly connected with the bottom of the metal shell 4 through a screw, and is connected through the screw, so that the electric connection and the stable structure are ensured.
In an implementation manner of the embodiment of the present invention, the dielectric board 1 may be a PCB double-layer board, and one side of the dielectric board is coated with copper, specifically, one side of a contact surface between the dielectric board 1 and the metal radiator 2 is coated with copper, so that a metal layer is formed in the middle of the bottom end surface of the dielectric board 1, and the metal layer is specifically in contact with the top end of the cylinder of the cylindrical slotted structure in the metal radiator 2.
In the implementation mode, in order to ensure that the dielectric plate 1 is tightly electrically contacted with the metal radiator 2, an annular groove structure can be arranged at the contact surface position of the metal layer of the dielectric plate 1 and the metal radiator 2, and metallization treatment is carried out in the annular groove; and the stable electric contact after installation is ensured, so that the installation is facilitated.
In the embodiment of the invention, the circumference of the assembly surface at the top end of the metal shell 4 forms a concave ring structure, the dielectric plate 1 is integrally covered on the concave ring structure of the assembly surface, and a circle of the circumference of the dielectric plate 1 is provided with a screw hole for fixedly connecting with the truncated cone-shaped metal shell 4, so that the metal shell 4 is ensured to be fixedly closed, and the dielectric plate 1 also plays a role in protecting the radome.
Fig. 3 is a schematic structural diagram of an interposer of a low-profile miniaturized wideband omnidirectional vertical polarization slot antenna according to an embodiment of the present invention. In an implementation manner of the embodiment of the invention, the non-metal annular region 7 is formed on the metal layer of the dielectric plate 1, which is beneficial to realizing broadband impedance matching; based on the installation requirement that metal feed probe 3 and dielectric plate 1 contact, make on dielectric plate 1 and have blind groove 8 and metallized blind hole, like this, metal feed probe 3 can go deep into dielectric plate 1, has certain nested effect in other words, can guarantee the validity of feed structure, also has easily installation, and does not destroy the security when dielectric plate 1 acts as the antenna house function. The type of the dielectric plate 1 in the embodiment of the present invention is, for example, taconic TLY-5.
Fig. 4 is a schematic structural diagram of a radiation feeder in a low-profile miniaturized wideband omni-directional vertically polarized slot antenna according to an embodiment of the present invention. In one mode of implementing the embodiment of the present invention, the metal feed probe 3 in the embodiment of the present invention is formed of a two-part structure, in which one part uses a radio frequency connector as an inner conductor, and uses a cylindrical metal conductor with a diameter larger than that of the radio frequency connector as an outer conductor, and a hole is formed in a bottom end face of the cylindrical metal conductor, and the metal feed probe 3 of a coaxial structure is formed by inserting the radio frequency connector into the cylindrical metal conductor.
In practical application, the type of the radio frequency connector in the metal feed probe 3 of the embodiment of the present invention may be BMA, and the diameter and length of the inner conductor are both small and cannot meet the actual feed requirement, so the metal feed probe 3 is designed as a two-section structure; the top of the outer conductor in the metal feed probe 3 is directly contacted with the metal layer of the dielectric plate 1, the bottom end of the radio frequency connector is provided with a flange plate, a fixing hole is formed in the flange plate, and the radio frequency connector is fixedly connected with a central boss at the bottom of the circular truncated cone-shaped metal shell 4. In specific implementation, a threaded hole is processed at a corresponding position on a boss at the bottom of the metal shell 4, and the radio frequency connector is fixedly connected with the boss at the bottom of the metal shell 4 through a screw. In the embodiment of the invention, two sections of metal are selected as the metal feed probe 3, so that the impedance matching is realized and the processing is easy.
In the specific implementation of the omnidirectional vertical polarization slot antenna provided by the embodiment of the invention, the metal radiator 2 with the cylindrical structure and the side wall provided with the slot is made of metal materials, and the edge of the slot and the edge generated due to the thickness after metal processing are both subjected to smooth processing, so that the out-of-roundness characteristic of the antenna is facilitated; and the extension structure at the bottom of the antenna is used for being fixedly connected with the bottom of the metal shell, and the fixing screw hole is from bottom to top, so that the antenna is not easy to be punched and the out-of-roundness characteristic of the antenna is facilitated.
In addition, the circular truncated cone-shaped metal shell 4 in the embodiment of the invention is formed by hollowing out cylindrical metal, and an annular skirt is arranged on the periphery of the metal shell 4 and used for conformally mounting the low-profile miniaturized broadband omnidirectional vertical polarization slot antenna and the carrying platform through the annular skirt.
Compared with the existing vertical polarization omnidirectional antenna, the low-profile miniaturized broadband omnidirectional vertical polarization slot antenna provided by the embodiment of the invention has the advantages of novel design, simple and compact structure, capability of obtaining a broadband, low-profile and vertical polarization omnidirectional radiation mode by slotting operation on a simple structure, and easiness for conformal installation with a carrying platform because the antenna structure is arranged in a low-profile cavity formed by a metal shell 4. In addition, the omnidirectional vertical polarization slot antenna is easy to process, simple in material, capable of greatly reducing design complexity and processing cost, suitable for popularization and capable of achieving low profile and broadband characteristics through a simple technical means. Furthermore, the design structure of the omnidirectional vertical polarization slot antenna provided by the embodiment of the invention can be expanded to realize omnidirectional radiation modes such as dual-frequency and even multi-frequency, vertical and horizontal dual polarization and the like; the antenna is beneficial to reducing the cost of the antenna, lightening the load bearing burden of a wireless communication system and realizing the miniaturization and the multiple functions of the communication system.
The following is a schematic illustration of an embodiment of a low-profile miniaturized wideband omni-directional vertically polarized slot antenna provided by a specific implementation example.
Examples of the implementation
This implementation example provides a low-profile miniaturized broadband omnidirectional vertically polarized slot antenna, and its main structure includes: the antenna comprises an antenna radiator, a radiation feed body, a metal shell and an antenna housing.
As shown in fig. 1 and fig. 2, a slot is formed in the cylindrical side wall of the cylindrical metal radiator 2, and the cylindrical top of the metal radiator 2 is in contact with the metal layer of the dielectric plate 1, the metal layer of the dielectric plate 1 is excited by the outer conductor 3 of the metal feed probe 3 of the coaxial structure, the inner conductor is fixedly connected with the metal shell connecting bottom boss to form an electrical wall structure, and an omnidirectional vertical polarization radiation mode is formed by utilizing equivalent magnetic current radiation of the slot of the cylindrical side wall of the metal radiator 2.
The low-profile miniaturized broadband omnidirectional vertical polarization slot antenna provided by the embodiment sequentially comprises a dielectric plate 1, a metal radiator 2 which is of a cylindrical structure and provided with a suture line on the side wall, a metal feed probe 3 of a coaxial structure, a truncated cone-shaped metal shell 4 and a metal tray 5 from top to bottom. The dielectric plate 1 is positioned at the top of the cylindrical metal radiator 2 and is in contact with the cylindrical metal radiator, the contact surface of the dielectric plate 1 is in contact with the metal layer of the dielectric plate 1, the dielectric plate 1 adopts a PCB double-layer plate process, and the single surface of the dielectric plate is coated with copper; the dielectric plate 1 is arranged on the top of the whole metal shell 4, is fixed with the round table-shaped metal shell 4 through edge screws and also serves as an antenna housing, so that a closed metal cavity structure is formed; the periphery of the metal shell 4 is designed with a skirt edge for being mounted on the carrying platform, which is beneficial to conformal mounting with the carrying platform.
A schematic diagram of a three-dimensional structure of an omnidirectional vertically polarized slot antenna is shown in fig. 2. A pair of symmetrical structure gaps 6 for controlling a vertical polarization omnidirectional radiation mode are formed in the cylindrical side wall of the metal radiator 2, a nonmetal annular region 7 is formed on the metal layer of the dielectric plate 1, for convenience in installation and debugging, a blind groove and a blind hole structure 8 are formed in the dielectric plate 1, and the top of the metal feed probe 3 is in contact with the metal layer of the dielectric plate 1 to form a metalized blind groove region.
The side walls of the cylindrical structure of the metal radiator 2 are slotted as shown in fig. 2. A pair of horizontal gaps 6 are formed on the cylindrical side wall of the metal radiator 2, and a vertical polarization omnidirectional radiation mode is formed by utilizing equivalent magnetic current between the gaps. The impedance matching is realized by exciting with a metal feedback probe 3 and carrying out capacitive loading on the top, and the impedance matching is embodied in the slot antenna structure, namely a nonmetal annular region 7 of the metal layer of the dielectric plate 1. The top of the cylinder with the gap 6 on the metal radiator 2 is electrically contacted with the metal layer of the dielectric plate 1, the outer conductor of the metal feed probe 3 with the coaxial structure directly excites the metal layer of the dielectric plate 1 to form an electric wall structure, the inner conductor is fixedly connected with the bottom boss of the metal shell 4, and the metal radiator 2 with the gap structure is electrically connected with the metal shell 4 through the bottom brim structure.
As shown in fig. 3, this embodiment provides a dielectric plate 1 of a low-profile miniaturized wideband omni-directional vertically polarized slot antenna. The metal layer at the bottom of the metal feed probe is contacted with the top end of the cylinder of the metal radiator 2, and for stable feed and convenient installation, the contact surface of the metal feed probe 3 and the copper-clad layer of the dielectric plate 1 and the contact surface of the cylinder structure of the metal radiator 2 and the copper-clad layer of the dielectric plate 1 are both provided with groove-shaped structures, and the grooves are metallized. The dielectric plate 1 is also used as an antenna housing, and therefore, a circle of screw holes are formed around the dielectric plate and are fixedly installed in the cavity.
As shown in fig. 4, the metal feed probe 3 of the low-profile miniaturized wideband omnidirectional vertically polarized slot antenna provided by this embodiment is composed of two metal conductors with different diameters, one is the inner conductor of the rf connector itself, and the other is the cylindrical metal conductor with larger diameter.
As shown in fig. 5, the metal housing 4 of the low-profile miniaturized wideband omnidirectional vertically polarized slot antenna provided in this embodiment is configured as a truncated cone with a low profile, and is hollowed out by a cylindrical metal member, and the periphery of the metal housing is designed with a skirt to facilitate conformal installation with a mounting platform. The mounting platform is embodied by a large diameter metal tray 5 in fig. 2 and 5.
As shown in fig. 6, a schematic diagram of the low-profile miniaturized wideband omnidirectional vertically polarized slot antenna provided by the embodiment of the present invention is installed on a metal tray, and the metal tray 5 is also marked on the figure.
Fig. 7 is a schematic diagram of an antenna standing-wave ratio simulation curve of the low-profile miniaturized wideband omni-directional vertically polarized slot antenna according to the embodiment of the present invention shown in fig. 1. FIG. 7 shows the results of full-wave simulation of an omnidirectional vertically polarized slot antenna in a processing state, and the impedance bandwidth can cover 0.94-1.54GHz according to the standing wave curve.
As shown in fig. 8a to 8c, they are simulation graphs of different elevation gain distributions in the horizontal plane of the omnidirectional vertically polarized slot antenna at different frequencies; the elevation angle is 60 degrees, 70 degrees, 80 degrees and 90 degrees. Specifically, fig. 8a is a simulation diagram of different pitch angle gain distributions of the omnidirectional vertically polarized slot antenna in the horizontal plane according to the embodiment of the present invention shown in fig. 1; in fig. 8a, the pitch angle is 60 °,70 °,80 °,90 °; the frequency is 0.95GHz; fig. 8b is a simulation diagram of different pitch angle gain distributions of the omnidirectional vertically polarized slot antenna in the horizontal plane according to the embodiment of the present invention shown in fig. 1; in fig. 8b the pitch angle is 60 °,70 °,80 °,90 °; the frequency is 1.1GHz; fig. 8c is a simulation diagram of different pitch angle gain distributions of the omnidirectional vertically polarized slot antenna in the horizontal plane according to the embodiment of the present invention shown in fig. 1; in fig. 8c the pitch angle is 60 °,70 °,80 °,90 °; the frequency was 1.25GHz.
In order to verify the feasibility of the low-profile miniaturized broadband omnidirectional vertical polarization slot antenna provided by the market advantage of the invention, the omnidirectional vertical polarization radiation mode is verified by full-wave simulation software. As shown in fig. 7, the antenna is polarized predominantly vertically and has an omnidirectional radiation pattern in the horizontal direction.
The above examples mainly illustrate the low-profile miniaturized broadband and omnidirectional vertically polarized radiation characteristics of the slot antenna. Although only some embodiments of this patent have been described, this patent is not limited by the above-described examples, and other examples that do not depart from the spirit and scope of this patent are intended to be protected by this patent.
Although the embodiments of the present invention have been described above, the present invention is not limited to the embodiments described above. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (9)
1. A low profile miniaturized wideband omni-directional vertically polarized slot antenna, comprising: an antenna radiator, a radiation feed, a metal housing and an antenna cover;
the antenna radiator adopts a metal radiator (2) with a cylindrical structure; the round dielectric plate (1) is arranged on the top of the metal radiator (2) and is in contact with the metal radiator, and the metal radiator (2) is in contact with the metal layer of the dielectric plate (1); a gap is formed in the cylindrical side wall of the metal radiator (2), and an omnidirectional vertical polarization radiation mode is formed through equivalent magnetic current radiation of the gap; a metal feed probe (3) is adopted as the radiation feeder, and the metal feed probe (3) comprises an inner conductor and an outer conductor which are of a coaxial structure;
the utility model discloses a metal feeding probe antenna, including metal feed probe (3), metal feed plate (4), metal feed plate (1), metal feed plate (4) whole sets up to the round platform form, inside is formed with the metal cavity of round platform form, the assembly surface of antenna radiator is seted up on the top, the bottom fixed connection of the inner conductor bottom of metal feed probe (3) and round platform form metal shell (4), inside the metal cavity is arranged in to whole antenna radiator, make the outer conductor of metal feed probe (3) pass metal radiator (2), and the top supports with the metal level of dielectric plate (1) and leans on the contact, and through the assembly surface fixed connection of dielectric plate (1) and round platform form shell (4), form the antenna house.
2. The low profile miniaturized wideband omni-directional vertically polarized slot antenna of claim 1,
a pair of gaps in the horizontal direction are formed in the cylinder side wall of the metal radiator (2) with the cylindrical structure along the circumferential direction, and the positions and the structures of the pair of gaps are kept to be symmetrically arranged, so that an omnidirectional mode is formed by adopting gap equivalent magnetic current, and the polarization mode is vertical polarization;
the top end of the metal radiator (2) with the cylindrical structure is specifically contacted with the metal layer of the dielectric slab (1);
the bottom end of the metal radiator (2) with the cylindrical structure is fixedly connected with the bottom of the metal shell (4).
3. The low profile miniaturized wideband omni-directional vertically polarized slot antenna of claim 2,
the medium plate (1) is a PCB double-layer plate, copper is coated on one side of a contact surface of the metal radiator (2), the metal layer is formed in the middle of the bottom end face of the medium plate (1), and the metal layer is in contact with the top end of a cylinder of a cylindrical slotted structure in the metal radiator (2).
4. The low profile miniaturized wideband omni-directional vertically polarized slot antenna of claim 3,
and an annular groove structure is arranged at the position of the contact surface of the metal layer of the dielectric plate (1) and the metal radiator (2), and the annular groove is metallized.
5. The low-profile miniaturized wideband omni-directional vertically polarized slot antenna according to claim 4,
the periphery of the assembly surface at the top end of the metal shell (4) forms a concave ring structure, and the dielectric plate (1) is integrally covered on the concave ring structure of the assembly surface and fixedly connected with the assembly surface through screws.
6. The low profile miniaturized wideband omni-directional vertically polarized slot antenna according to any one of claims 1 to 5,
in the metal feed probe (3), a radio frequency connector is used as an inner conductor, a cylindrical metal conductor with the diameter larger than that of the radio frequency connector is used as an outer conductor, a hole is formed in the bottom end face of the cylindrical metal conductor, and the radio frequency connector is inserted into the cylindrical metal conductor to form the metal feed probe (3) with a coaxial structure;
the top of an outer conductor in the metal feed probe (3) is directly contacted with a metal layer of the dielectric plate (1), a flange plate is arranged at the bottom end of the radio frequency connector, and a fixing hole is formed in the flange plate and used for fixedly connecting the radio frequency connector with a bottom center lug boss of the circular truncated cone-shaped metal shell (4) through a screw.
7. The low profile miniaturized wideband omni-directional vertically polarized slot antenna according to any one of claims 1 to 5,
a nonmetal annular region (7) is formed in the metal layer of the dielectric plate (1) and is used for forming broadband impedance matching; and a blind groove (8) and a metallized blind hole are formed on the dielectric plate (1), so that the metal feed probe (3) is deep into the dielectric plate (1) to form a nested structure.
8. The low profile miniaturized wideband omni-directional vertically polarized slot antenna according to any one of claims 1 to 5,
the edge of the metal radiator (2) and the edge of the cylindrical side wall of the metal radiator (2) formed by the gap are subjected to smoothing treatment.
9. The low profile miniaturized wideband omni-directional vertically polarized slot antenna according to any one of claims 1 to 5,
the round table-shaped metal shell (4) is formed by hollowing out cylindrical metal, and an annular skirt edge is arranged on the periphery of the metal shell (4) and used for conformal installation of the low-profile miniaturized broadband omnidirectional vertical polarization slot antenna and the carrying platform through the annular skirt edge.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211495537.0A CN115714269A (en) | 2022-11-27 | 2022-11-27 | Low-profile miniaturized broadband omnidirectional vertical polarization slot antenna |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211495537.0A CN115714269A (en) | 2022-11-27 | 2022-11-27 | Low-profile miniaturized broadband omnidirectional vertical polarization slot antenna |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115986424A (en) * | 2023-03-20 | 2023-04-18 | 广东工业大学 | Ultra-wideband vertical polarization patch omnidirectional antenna |
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- 2022-11-27 CN CN202211495537.0A patent/CN115714269A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115986424A (en) * | 2023-03-20 | 2023-04-18 | 广东工业大学 | Ultra-wideband vertical polarization patch omnidirectional antenna |
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