Double-fed ceiling antenna

Abstract

The utility model relates to the technical field of antenna equipment, and discloses a double-fed ceiling antenna, which comprises a shell, a first reflecting plate, a first antenna, a second reflecting plate and a second antenna are sequentially arranged in the shell, and the first reflecting plate and the second reflecting plate are respectively fixed on the shell. The first reflecting plate is arranged on one side, close to a mounting end, in the shell, the first antenna is fixed on the first reflecting plate, and the second antenna is fixed on the second reflecting plate; the first feeder line is connected with the first antenna; and the second feeder line is connected with the second antenna. According to the double-fed ceiling antenna, the first reflecting plate, the first antenna, the second reflecting plate and the second antenna are sequentially arranged in the shell, the isolation degree of the two antennas in the double-fed ceiling antenna can be improved, the situation that signal interference occurs when the two antennas work is reduced or even avoided, meanwhile, the reflecting plates can reflect signals facing one side of the mounting end to the periphery, and the signal transmission efficiency is improved. The signal strength of the ceiling antenna in the using direction can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of antenna devices, and more specifically, to a dual-feed ceiling antenna. Background Art

[0002] In order to ensure communication quality, broadband ceiling antennas and narrowband ceiling antennas in ceiling antennas are usually designed separately and then used in combination to achieve the effect of multiple input multiple output (MIMO). However, this will double the demand for the number of ceiling antennas and greatly increase the cost. Some manufacturers simply integrate broadband ceiling antennas and narrowband ceiling antennas in an antenna housing. Nominally, one antenna achieves the effect of multiple input multiple output, but there is a certain interference between the two antennas inside, the signal strength is weak, and the volume is relatively large, and the manufacturing cost is high. Summary of the Utility Model

[0003] The utility model is made to solve the above technical problems. One of its purposes is to provide a dual-feed ceiling antenna with a high isolation degree and strong signal between the two antennas inside.

[0004] According to an embodiment of the utility model, a dual-feed ceiling antenna is provided, including: a housing, inside which a first reflector, a first antenna, a second reflector, and a second antenna are sequentially provided. The first reflector and the second reflector are respectively fixed on the housing. The first reflector is provided on one side of the housing close to the installation end. The first antenna is fixed on the first reflector, and the second antenna is fixed on the second reflector; a first feeder connected to the first antenna; and a second feeder connected to the second antenna.

[0005] Preferably, the frequency bandwidth of the first antenna is greater than that of the second antenna.

[0006] Preferably, the first reflector is a metal plate.

[0007] Preferably, the first antenna is a conical dipole, and its outer periphery is connected to the first reflector via more than two grounding strips.

[0008] Preferably, the core wire of the first feeder passes through the first reflector and is connected to the first antenna; the outer conductor of the first feeder is connected to the first reflector.

[0009] Preferably, the second reflector is a PCB board with a reflection layer printed thereon.

[0010] Preferably, the reflection layer is circular, and its diameter is not less than the width of the first antenna.

[0011] Preferably, the second antenna is fixed at a position on the second reflector opposite to the reflective layer.

[0012] Preferably, the second antenna includes a dielectric substrate and a microstrip line thereon, and the dielectric substrate is vertically fixed at the center of the reflective layer.

[0013] Preferably, two or more positioning holes and two or more first mounting holes are formed on the second reflector; two or more positioning posts and two or more second mounting holes are formed inside the housing. The positioning posts are opposite to the positioning holes, and the second mounting holes are opposite to the first mounting holes.

[0014] According to the above description and practice, the dual-feed ceiling antenna of the present invention can improve the isolation between the two antennas therein by sequentially arranging the first reflector, the first antenna, the second reflector and the second antenna in the housing, reduce or even avoid signal interference when the two antennas are working, and at the same time, the reflector can also reflect the signal toward the installation end side to the periphery, which can improve the signal strength of the ceiling antenna in the use direction. Description of the Drawings

[0015] Figure 1 It is a schematic exploded view of the dual-feed ceiling antenna involved in an embodiment of the present invention.

[0016] Figure 2 It is a schematic internal structure view of the dual-feed ceiling antenna involved in an embodiment of the present invention.

[0017] Figure 3 It is a schematic internal structure view of the housing in the dual-feed ceiling antenna involved in an embodiment of the present invention.

[0018] Figure 4 It is a schematic connection view of the second reflector and the housing in the dual-feed ceiling antenna involved in an embodiment of the present invention.

[0019] The reference numerals in the drawings are:

[0020] 1. Housing; 2. First feeder; 3. Second feeder; 4. First reflector; 5. First antenna; 6. Second reflector; 7. Second antenna; 8. Reflective layer; 9. Positioning hole; 10. Positioning post; 11. First mounting hole; 12. Second mounting hole; 13. Grounding strip. Detailed Description of the Invention

[0021] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments can be implemented in various forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The features, structures, or characteristics described may be combined in any suitable manner in one or more embodiments.

[0022] In addition, the accompanying drawings are only schematic illustrations of the present disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and thus repeated descriptions thereof will be omitted. It should be noted that in the present disclosure, the terms "comprising", "configured with", and "provided with" are used to mean an open inclusion, and mean that there may be additional elements, components, etc. in addition to the listed elements, components, etc.; the terms "first", "second", etc. are only used as labels and are not limitations on the number or order of their objects; the orientation or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation on the present invention.

[0023] Unless otherwise clearly defined and limited, the terms "mounted", "connected", and "coupled" shall be construed broadly, for example, they may be fixedly connected, detachably connected, or integrally connected; they may be mechanically connected or electrically connected; they may be directly connected or indirectly connected through an intermediate medium, and may be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] According to an embodiment of the present invention, a dual-fed ceiling antenna is provided. Please refer to Figures 1 to 4 , the dual-fed ceiling antenna includes a housing 1, a first feeder 2, and a second feeder 3. Inside the housing 1, a first reflector 4, a first antenna 5, a second reflector 6, and a second antenna 7 are sequentially provided.

[0025] As Figure 1 and Figure 2As shown, the outer shell 1 is a conical, semi-shell-shaped structure with one end open. When in use, the open end is fixed as the installation end on the roof or wall surface, and can hide each antenna and reflector in the outer shell 1. The outer shape of the outer shell 1 is set according to the shapes and sizes of the respective antennas therein. For example, in this embodiment, the first reflector 4, the first antenna 5, the second reflector 6, and the second antenna 7 are installed in the outer shell 1 along the same axis. The second reflector 6 and the second antenna 7 are closer to the interior of the outer shell 1 and have smaller external dimensions compared to the first reflector 4 and the first antenna 5. Therefore, the outer shell 1 is set to be a generally conical streamline structure, which is small in volume, saves materials, and is also relatively beautiful.

[0026] The first reflector 4 and the second reflector 6 are respectively fixed on the outer shell 1, and the first reflector 4 is arranged on one side of the outer shell 1 close to the installation end. As Figure 1 shown, the first reflector 4, the first antenna 5, the second reflector 6, and the second antenna 7 extend sequentially from the installation end side inside the outer shell 1 towards the interior. The four are arranged longitudinally, which can reduce the lateral size of the ceiling antenna. Among them, the first antenna 5 is fixed on the first reflector 4 and is connected to the first feeder 2; the second antenna 7 is fixed on the second reflector 6 and is connected to the second feeder 3. A second reflector 6 is arranged between the first antenna 5 and the second antenna 7, which can improve the isolation degree between the two antennas. Even if they are arranged longitudinally, no significant signal interference will occur.

[0027] As Figure 2 shown, among the radiation signals generated by the second antenna 7, the radiation signals directed downward can be reflected by the second reflector 6 and radiated peripherally, and no longer reach near the first antenna 5, thereby avoiding signal interference with the first antenna 5. And the radiation signals directed downward are reflected by the second reflector 6 and radiated peripherally, which can also improve the signal strength of the second antenna 7 in the peripheral direction, that is, improve the signal strength of the ceiling antenna in the use direction.

[0028] Among the radiation signals generated by the first antenna 5, the radiation signals directed upward can be reflected by the second reflector 6 and radiated peripherally and downward, and the radiation signals directed downward can be reflected by the first reflector 4 and radiated peripherally, and no longer reach near the second antenna 7, thereby avoiding signal interference with the second antenna. And the radiation signals are reflected by the second reflector 6 and radiated peripherally, which can also improve the signal strength of the first antenna 5 in the peripheral direction, that is, improve the signal strength of the ceiling antenna in the use direction.

[0029] In this embodiment, the frequency bandwidth of the first antenna 5 is greater than that of the second antenna 7. In other words, the first antenna 5 is a broadband antenna, and the second antenna 7 is a narrowband antenna. For example, the first antenna 5 covers the 2G - 4G frequency bands, and the second antenna 7 covers the 5G frequency band. Or the first antenna 5 covers the 2G - 5G frequency bands, and the second antenna 7 covers the 5G frequency band. Since the space on one side of the housing 1 near the installation end is relatively large, it is convenient to install and set up the first antenna 5 with a larger frequency bandwidth. After the ceiling antenna is installed, compared with the first antenna 5, the second antenna 7 is located farther away from the roof, and there are fewer structures blocking its signal propagation. Therefore, the operating frequency band of the second antenna 7 is set higher than that of the first antenna 5, which is beneficial to the signal propagation of the second antenna 7.

[0030] In this embodiment, the first reflector 4 is a metal plate, which is installed at the position closest to the roof during use and can reflect the signals radiated within its range to the periphery and downward, so as to fully improve the signal strength of the ceiling antenna within the use range.

[0031] Furthermore, the first antenna 5 is a conical dipole, and its outer periphery is connected to the first reflector 4 via more than two grounding strips 13. While supporting and fixing the conical dipole, it can also achieve its own grounding. Moreover, the conical dipole can be applied to a relatively wide frequency band range and has good signal strength. As Figure 2 shown, three grounding strips 13 are evenly arranged on the outer periphery of the conical dipole, which can stably mount the conical dipole on the first reflector 4.

[0032] Furthermore, the first feeder 2 is a coaxial cable. Its core wire passes through the first reflector 4 and is connected to the first antenna 5, and the outer conductor of the first feeder 2 is connected to the first reflector 4. This structural form enables the first antenna 5 to work with the best signal strength within a relatively wide frequency band range.

[0033] Furthermore, in this embodiment, the second reflector 6 is a PCB board, on which a reflective layer 8 is printed. Its weight can be reduced compared with a fully metal reflector. In addition, it can also provide an installation basis for the second antenna 7. Specifically, in this embodiment, the second antenna 7 is fixed at a position opposite to the reflective layer 8 on the second reflector 6, which can make the reflection effect of the reflective layer 8 optimal and improve the isolation effect from the first antenna 5. Further, the second antenna 7 includes a dielectric substrate and microstrip lines printed thereon. The dielectric substrate is vertically fixed at the center of the reflective layer 8, for example, directly inserted or snapped onto the second reflector 6, which is convenient for assembling the ceiling antenna.

[0034] Further, in this embodiment, the reflective layer 8 is circular, and its diameter is not less than the width of the first antenna 5. As Figure 2As shown, the diameter of the reflection layer 8 is slightly larger than that of the conical oscillator, so it can better isolate the second antenna 7 and the first antenna 5 and play a better reflection role.

[0035] In addition, since the second antenna 7 and the second reflector 6 are in a deeper position in the housing 1, in order to facilitate the installation of the second reflector 6, in this embodiment, more than two positioning holes 9 and more than two first mounting holes 11 are formed on the second reflector 6, and at the same time, more than two positioning posts 10 and more than two second mounting holes 12 are formed in the housing 1. The positioning posts 10 are opposite to the positioning holes 9, and the second mounting holes 12 are opposite to the first mounting holes 11.

[0036] Specifically, as Figure 3 and Figure 4 shown, three positioning posts 10 and three second mounting holes 12 are equidistantly arranged on the inner wall of the housing 1, and three positioning holes 9 and three first mounting holes 11 are equidistantly arranged on the second reflector 6. When assembling this ceiling antenna, first insert the second antenna 7 into the second reflector 6, then put the positioning holes 9 on the second reflector 6 on the positioning posts 10 to temporarily position the second reflector 6. At this time, the first mounting holes 11 are opposite to the second mounting holes 12, and a screw can be inserted into them to fix the second reflector 6 in the housing 1. The first antenna 5 is fixed on the first reflector 4 through the grounding strip 13. Since the first reflector 4 is at the installation end of the housing 1 and has a larger operating space, the first reflector 4 can be directly bolted to the housing 1 to complete the assembly of the entire ceiling antenna.

[0037] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, in any aspect, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claimed rights.

Claims

1. A double-fed ceiling antenna, characterized in that, Comprising: A housing, inside which there are successively arranged a first reflector, a first antenna, a second reflector and a second antenna. The first reflector and the second reflector are respectively fixed on the housing. The first reflector is arranged on one side of the housing close to the installation end. The first antenna is fixed on the first reflector, and the second antenna is fixed on the second reflector; A first feeder, connected to the first antenna; A second feeder, connected to the second antenna.

2. The dual-feed ceiling antenna according to claim 1, characterized in that The frequency bandwidth of the first antenna is greater than that of the second antenna.

3. The dual-feed ceiling antenna according to claim 1, characterized in that The first reflector is a metal plate.

4. The dual-feed ceiling antenna according to claim 3, characterized in that The first antenna is a conical oscillator, and its outer periphery is connected to the first reflector via more than two grounding strips.

5. The dual-feed ceiling antenna according to claim 4, characterized in that The core wire of the first feeder passes through the first reflector and is connected to the first antenna; The outer conductor of the first feeder is connected to the first reflector.

6. The dual-feed ceiling antenna according to claim 1, characterized in that The second reflector is a PCB board, on which a reflection layer is printed.

7. The dual-feed ceiling antenna according to claim 6, characterized in that The reflection layer is circular, and its diameter is not less than the width of the first antenna.

8. The dual-feed ceiling antenna according to claim 6, characterized in that The second antenna is fixed at a position on the second reflector opposite to the reflection layer.

9. The dual-feed ceiling antenna according to claim 8, characterized in that The second antenna includes a dielectric substrate and a microstrip line thereon. The dielectric substrate is vertically fixed at the center of the reflection layer.

10. The dual-feed ceiling antenna according to any one of claims 1 to 9, characterized in that More than two positioning holes and more than two first mounting holes are formed on the second reflector; More than two positioning posts and more than two second mounting holes are formed inside the housing. The positioning posts are opposite to the positioning holes, and the second mounting holes are opposite to the first mounting holes.

Images