CN215221018U - Laminated multi-frequency antenna - Google Patents
Laminated multi-frequency antenna Download PDFInfo
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- CN215221018U CN215221018U CN202121647440.8U CN202121647440U CN215221018U CN 215221018 U CN215221018 U CN 215221018U CN 202121647440 U CN202121647440 U CN 202121647440U CN 215221018 U CN215221018 U CN 215221018U
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Abstract
The utility model discloses a laminated multi-frequency antenna, which comprises a reflecting plate, and a first radiating unit, a second radiating unit and a third radiating unit which are sequentially laminated from bottom to top on the reflecting plate, wherein the first radiating unit, the second radiating unit and the third radiating unit are different-frequency radiating units, and the unit sizes are sequentially reduced; the first radiating unit is a microstrip patch unit. The utility model discloses range upon range of formula multifrequency antenna is with the range upon range of three kinds of radiating element in the vertical direction of working in different frequencies, has realized the coexistence of multifrequency antenna on same structure. The micro-strip patch is adopted as a conformal carrier of the multi-frequency antenna, the micro-strip patch has the characteristic of low profile, the size of the multi-frequency antenna can be reduced, and then the rest two different frequency units are nested on the carrier, so that the purpose of the multi-frequency antenna in a limited space is realized.
Description
Technical Field
The utility model relates to a multifrequency antenna technical field especially relates to a range upon range of formula multifrequency antenna.
Background
In the wireless communication upgrade iteration process, the terminal equipment must maintain the most advanced technology, and the wireless communication module comprises four parts, namely an antenna, a radio frequency front-end module, a radio frequency transceiver module and a baseband signal processor, wherein the antenna serves as a predecessor and is at the top of a supply-demand relationship. The antenna radiates electromagnetic waves through a certain physical structure, the antenna cannot simply form a device by concentrated elements, particularly, the lower the frequency band is, the longer the wavelength is, the more difficult the size is to be reduced, and how to enable the antenna to transmit electromagnetic energy with high radiation efficiency under the strict geometric dimension is the first problem faced by modern communication.
The antenna needs to serve different communication standards, and the number of antennas is increased correspondingly to realize multi-frequency or broadband, but this simple and rough method is not favorable for cost reduction of the communication system and causes more electromagnetic interference, and for this reason, the antenna must be developed towards small volume, large capacity and multi-band. In order to improve the integration level of the system, on one hand, a multi-frequency microstrip antenna can be adopted to meet the requirements of various communication modes, but the multi-frequency microstrip antenna generally adopts slot coupling to generate multi-mode excitation to realize the requirement of multiple frequency bands, and the main defect is that the bandwidth is too narrow, the bandwidth is often only dozens of mega or even dozens of mega, and the requirement of modern communication ultra-wide frequency bands is not met, and the microstrip antenna has lower gain and small power bearing threshold.
SUMMERY OF THE UTILITY MODEL
In order to solve the above problem, the utility model provides a range upon range of formula multifrequency antenna.
In order to achieve the above purpose, the utility model adopts the following technical proposal:
a laminated multi-frequency antenna comprises a reflecting plate, and a first radiating unit, a second radiating unit and a third radiating unit which are sequentially laminated on the reflecting plate from bottom to top, wherein the first radiating unit, the second radiating unit and the third radiating unit are different-frequency radiating units, and the sizes of the units are sequentially reduced; the first radiating unit is a microstrip patch unit.
As the utility model provides a range upon range of formula multifrequency antenna's a preferred embodiment, microstrip paster unit includes upper patch and lower floor's paster, lower floor's paster area is greater than upper patch area, upper patch and lower floor's paster have certain interval air bed in the vertical direction.
As a preferred embodiment of the stacked multi-band antenna provided in the present invention, the upper patch includes a dielectric plate and a patch layer formed on the dielectric plate; the lower layer patch is a metal plate.
As the utility model provides a preferred embodiment of range upon range of formula multifrequency antenna, the through-hole has been seted up at the dielectric plate middle part, the second radiating element is fixed the metal sheet just passes the through-hole.
As a preferred embodiment of the stacked multi-frequency antenna provided in the present invention, the metal plate is folded upward to form a certain included angle with the horizontal plane.
As a preferred embodiment of the stacked multi-band antenna provided in the present invention, the first radiating element further includes an L-shaped coupling feed structure, one polarization of the first radiating element corresponds to a pair of L-shaped feed portions coupled, and an excitation phase of a pair of L-shaped feed portions on the same polarization is in reverse phase.
As the present invention provides a preferred embodiment of the stacked multi-band antenna, the L-shaped coupling feed structure is disposed below the metal plate of the first radiating element, and the L-shaped coupling feed structure is disposed between the metal plates to form a coupling feed space.
As a preferred embodiment of the stacked multi-frequency antenna provided in the present invention, the second radiation unit is a hollowed-out bowl-shaped die-casting unit, and includes two pairs of half-wave dipoles, each dipole includes a pair of dipole arms; the third radiating element is inlaid in the second radiating element, and the third radiating element and the second radiating element are not on the same plane.
As a preferred embodiment of the stacked multi-frequency antenna provided in the present invention, the pair of oscillator arms of the second radiation unit is output from the feed outlet after being in phase and fed through the cable.
As a preferred embodiment of the stacked multi-band antenna provided in the present invention, the central operating frequencies of the first radiating element, the second radiating element and the third radiating element are f1, f2 and f3, respectively, and f1< f2< f 3.
The utility model discloses following beneficial effect has:
the utility model discloses range upon range of formula multifrequency antenna is with the range upon range of three kinds of radiating element in the vertical direction of working in different frequencies, has realized the coexistence of multifrequency antenna on same structure. Simultaneously with the antenna (first radiating element) of working in the lowest frequency adopt the form of microstrip paster as the conformal carrier of multifrequency antenna, its volume that has the reducible multifrequency antenna of the characteristic of low section, then nestification all the other two kinds of different frequency units (second radiating element and third radiating element) on the carrier to realized the purpose at the multifrequency antenna of finite space, range upon range of formula multifrequency antenna is small, the equipment is convenient, the stable performance, in addition, the utility model discloses still have advantages such as simple structure, bandwidth are big, gain height.
Drawings
Fig. 1 is a schematic structural view of the stacked multi-frequency antenna of the present invention;
fig. 2 is a side view of a first radiation unit in the stacked multi-frequency antenna of the present invention;
fig. 3 is a schematic diagram of a metal plate and an L-shaped coupling feed structure in the stacked multi-frequency antenna of the present invention;
fig. 4 is a schematic bottom view of the metal plate and the L-shaped coupling feed structure of the stacked multi-band antenna of the present invention;
fig. 5 is a schematic diagram of a second radiation unit and a third radiation unit in the stacked multi-frequency antenna of the present invention;
fig. 6 is a schematic diagram of a second radiation unit in the stacked multi-band antenna of the present invention.
Detailed Description
In order to make the technical solution of the present invention better understood, the technical solution of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.
Referring to fig. 1-6, a stacked multi-band antenna includes a reflection plate 1, a first radiation unit 2, a second radiation unit 3, and a third radiation unit 4, where the first radiation unit 2, the second radiation unit 3, and the third radiation unit 4 are stacked on the reflection plate 1 in a vertical direction in a spatial structure, and the unit sizes are sequentially reduced, the first radiation unit 2 with the lowest working frequency in the multi-band antenna is at the bottom layer, and the third radiation unit 4 with the highest working frequency in the multi-band antenna is at the top layer, that is, the central working frequencies of the first radiation unit 2, the second radiation unit 3, and the third radiation unit 4 are f1, f2, f3, and f1< f2< f3, respectively. Further, the first radiation element 2 is a microstrip patch element, and the microstrip patch has the advantages of low profile and easy conformation with other carriers, and can be used as the bottommost layer of the stacked antenna. Through the multiplexing of the conformal structure of bottom, the multifrequency of limited space has been realized for multifrequency antenna volume is littleer, the equipment is more convenient, the performance is more stable.
Specifically, microstrip paster unit is double-deck paster air microstrip structure, specifically includes upper strata paster and lower floor's paster, lower floor's paster area is greater than upper strata paster area, upper strata paster and lower floor's paster have certain interval air bed 23 in the vertical direction. By such design, the thickness h1 of the spaced air layer 23 is the vertical distance of the double-layer patch, and the effect of stabilizing the air dielectric constant compared with other media is utilized, so that the equivalent dielectric constant of the antenna can be reduced, the Q value of the antenna can be reduced, and the bandwidth of the first radiation unit 2 can be widened. Further, the vertical distance between the lower patch and the reflecting plate 1 is h2, and h1< h2, so that the design is more favorable for impedance matching.
Further, the upper layer patch includes a dielectric plate 21 and a patch layer formed on the dielectric plate 21. The dielectric plate 21 is preferably, but not limited to, a double-sided copper-clad microstrip dielectric plate 21. The lower layer patch is a metal plate 22. In specific implementation, the dielectric plate 21 is provided with the periodic array of small circular holes 211, and the design can be used as a frequency selection surface, which is beneficial to reducing interference to the second and third radiation units. A through hole 212 is formed in the middle of the dielectric plate 21, and the second radiation unit 3 passes through the through hole 212 and is fixed on the metal plate 22. The metal plate 22 is preferably fixed to the reflection plate 1 by a plurality of insulated hexagonal columns 11, wherein the reflection plate 1 is a metal frame with a side frame.
Further, the metal plate 22 is preferably, but not limited to, a square structure, and the side edges of the metal plate 22 are folded upwards to form a certain included angle θ with the horizontal plane of the metal plate 22, so that the design is beneficial to reducing the physical size of the radiation unit.
Further, the first radiation element 2 further includes an L-shaped coupling feed structure 24, one polarization of the first radiation element 2 is correspondingly coupled with a pair of L-shaped feeds, and excitation phases of the pair of L-shaped feeds on the same polarization are opposite. The first radiating element 2 has two orthogonal polarizations and comprises two pairs of L-shaped coupling feed structures 24. Taking one polarization of the first radiation element 2 as an example, the polarization includes a pair of L- shaped feeding portions 241 and 242, the L- shaped feeding portions 241 and 242 are symmetric with respect to the center of the metal plate 22, and when the first radiation element 2 is fed, the two L-shaped feeding portions are in opposite phases, that is, the excitation phases of the two L-shaped feeding portions are different by 180 °, such excitation contributes to the improvement of polarization isolation and cross polarization discrimination.
The L-shaped coupling feed structure 24 is disposed below the metal plate 22 of the first radiating element 2, and in a specific implementation, the L-shaped coupling feed structure 24 is located right below the metal plate 22, and from top to bottom, in a top view, four L-shaped feed portions of two pairs of L-shaped coupling feed structures 24 are located right on diagonal lines of the metal plate 22. Further, there is a certain gap between the L-shaped coupling feeding structure 24 and the metal plate 22 as a coupling feeding distance.
Second radiation unit 3 is fretwork bowl form die-casting unit, specifically is four sides fretwork bowl form structure, and the preferred die-casting that forms through aluminum alloy forms. The second radiation unit 3 comprises two pairs of half-wave dipoles 31, each half-wave dipole 31 comprises a pair of dipole arms 311, each dipole arm 311 is in a hook-shaped structure, 4 fan-shaped arm bodies 32 are arranged at the bottom of the second radiation unit 3, and the 4 arm bodies 32 form a cavity of the second radiation unit 3.
The third radiating element 4 is embedded in the second radiating element 3, specifically, a cylindrical boss 33 is arranged at the center of the bottom of the second radiating element 3, and the third radiating element 4 can be fixed on the boss 33. The third radiating element 4 is an aluminum alloy die-casting element, each polarization of the third radiating element comprises a pair of dipoles, the third radiating element is integrally arranged inside the second radiating element 3, the third radiating element is not on the same plane with the second radiating element 3, and the top of the third radiating element 4 does not exceed the top of the second radiating element 3. In this case, the first radiation element 2 is equivalent to the reflection plate of the second radiation element 3, and the inside of the second radiation element 3 is equivalent to the reflection plate of the third radiation element 4, which is favorable for the convergence of the beam of the third radiation element 4.
The second radiation element 3 is fed in parallel through two coaxial cables 34 of 50-2 and then output from the feed outlet 35, so that the radiation element can be directly welded on the outside and then assembled on the laminated structure, and if the second radiation element 3 needs to be welded on the assembled laminated structure in the conventional back feeding mode, the operation is difficult. Further, the third radiating element 4 is directly fed through a coaxial cable, and after the three radiating elements are respectively fed, signals can be combined through a combiner, so that output connectors are reduced.
The utility model discloses following beneficial effect has:
the utility model discloses range upon range of formula multifrequency antenna is with the range upon range of three kinds of radiating element in the vertical direction of working in different frequencies, has realized the coexistence of multifrequency antenna on same structure. Simultaneously with the antenna (first radiating element 2) of working in the lowest frequency adopt the form of microstrip paster as the conformal carrier of multifrequency antenna, its volume that has the reducible multifrequency antenna of the characteristic of low section, then nestification all the other two kinds of different frequency units (second radiating element 3 and third radiating element 4) on the carrier to realized the purpose at the multifrequency antenna of finite space, range upon range of formula multifrequency antenna is small, the equipment is convenient, stable performance, in addition, the utility model discloses still have advantages such as simple structure, bandwidth are big, gain height.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
It is to be understood that the above-described embodiments are merely illustrative of some, but not restrictive, of the broad invention, and that the appended drawings illustrate preferred embodiments of the invention and do not limit the scope of the invention. This application is capable of embodiments in many different forms and is provided for the purpose of enabling a thorough understanding of the disclosure of the application. Although the present application has been described in detail with reference to the foregoing embodiments, it will be apparent to one skilled in the art that the present application may be practiced without modification or with equivalents of some of the features described in the foregoing embodiments. All equivalent structures made by using the contents of the specification and the drawings of the present application are directly or indirectly applied to other related technical fields and are within the protection scope of the present application.
Claims (10)
1. A laminated multi-frequency antenna is characterized by comprising a reflecting plate, and a first radiating unit, a second radiating unit and a third radiating unit which are sequentially laminated from bottom to top on the reflecting plate, wherein the first radiating unit, the second radiating unit and the third radiating unit are different-frequency radiating units, and the sizes of the units are sequentially reduced; the first radiating unit is a microstrip patch unit.
2. The stacked multi-frequency antenna according to claim 1, wherein the microstrip patch unit includes an upper patch and a lower patch, the lower patch having an area larger than that of the upper patch, and the upper patch and the lower patch having a spaced air layer in a vertical direction.
3. The stacked multi-frequency antenna according to claim 2, wherein the upper patch includes a dielectric plate and a patch layer formed on the dielectric plate; the lower layer patch is a metal plate.
4. The stacked multi-band antenna according to claim 3, wherein a through hole is formed in a middle portion of the dielectric plate, and the second radiation unit is fixed to the metal plate and penetrates through the through hole.
5. The stacked multi-frequency antenna as claimed in claim 3, wherein the metal plate has a side edge folded upward to form an angle with a horizontal plane.
6. The stacked multi-frequency antenna according to claim 1, wherein the first radiating element further comprises an L-shaped coupling feed structure, one polarization of the first radiating element is coupled to a pair of L-shaped feeds, and excitation phases of the pair of L-shaped feeds in the same polarization are opposite.
7. The stacked multi-frequency antenna according to claim 6, wherein the L-shaped coupling feed structure is disposed below a metal plate of the first radiation element, and a coupling feed interval is provided between the L-shaped coupling feed structure and the metal plate.
8. The stacked multi-frequency antenna according to claim 1, wherein the second radiating element is a hollowed-out bowl-shaped die-cast element, and comprises two pairs of half-wave dipoles, each dipole comprising a pair of dipole arms; the third radiating element is inlaid in the second radiating element, and the third radiating element and the second radiating element are not on the same plane.
9. The stacked multi-frequency antenna according to claim 8, wherein the pair of oscillator arms of the second radiation element are fed in phase and output from the feed outlet via a cable.
10. The stacked multi-frequency antenna according to claim 1, wherein the first, second, and third radiating elements have central operating frequencies of f1, f2, f3, and f1< f2< f3, respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121647440.8U CN215221018U (en) | 2021-07-19 | 2021-07-19 | Laminated multi-frequency antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121647440.8U CN215221018U (en) | 2021-07-19 | 2021-07-19 | Laminated multi-frequency antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215221018U true CN215221018U (en) | 2021-12-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121647440.8U Active CN215221018U (en) | 2021-07-19 | 2021-07-19 | Laminated multi-frequency antenna |
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| Country | Link |
|---|---|
| CN (1) | CN215221018U (en) |
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2021
- 2021-07-19 CN CN202121647440.8U patent/CN215221018U/en active Active
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