Four-port ceiling antenna

Abstract

The utility model provides a four-port ceiling antenna. The four-port ceiling antenna comprises a bottom plate; four induction aluminum sheets, wherein each induction aluminum sheet is fixed on the bottom plate; four high-frequency printed boards, wherein each high-frequency printed board corresponds to each induction aluminum sheet and is fixed on the bottom plate; one induction aluminum sheet and one high-frequency printed board form a group of vibrators, and each group of vibrators are arranged at an angle of 90 degrees; four cables; and the positioning columns on the outer cover penetrate through the positioning holes in the bottom plate and are fixed on the bottom plate. According to the utility model, the four ports provide more signal channels, the manufacturing cost is reduced through the oscillators combined by the high-frequency printed board and the aluminum sheets, and the four ports all realize that electrical performance indexes such as standing waves, intermodulation, isolation and the like within the frequency band width of 600-6000 mega meet the design requirements and the use requirements through the specific arrangement mode of the oscillators.

Description

Technical Field

[0001] The utility model relates to the technical field of antennas, in particular to a ceiling antenna. Background Art

[0002] Ceiling antenna is a type of mobile communication system antenna, mainly used for indoor signal coverage. It plays an important role in indoor network construction and optimization.

[0003] In the related art, ceiling antennas have problems such as few communication ports, high cost and narrow communication range. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a four-port ceiling antenna.

[0005] The technical solution adopted by the utility model is as follows:

[0006] The utility model proposes a four-port ceiling antenna, comprising: a bottom plate; an inductive aluminum sheet, wherein the inductive aluminum sheet comprises 4 pieces, each of which is fixed on the bottom plate; a high-frequency printed board, wherein the high-frequency printed board comprises 4 pieces, each of which is fixed on the bottom plate corresponding to each inductive aluminum sheet, each of which comprises a first to a fourth area, a first vibrator is printed on the back of the first area, a second vibrator is printed on the front of the second area, the first vibrator, the second vibrator and the inductive aluminum sheet constitute a vibrator of a first frequency bandwidth, a third vibrator is printed on the back of the third area, and a fourth vibrator is printed on the front of the second area. The fourth vibrator is printed on the front side, the third vibrator and the fourth vibrator constitute a vibrator of a second frequency band width, and the second frequency band width is greater than the first frequency band width; an inductive aluminum sheet and a high-frequency printed circuit board constitute a group of vibrators, and each group of vibrators is arranged at 90 degrees; the cables include 4 cables, and after each of the cables passes through the bottom plate, the cable core of the cable passes through the soldering pad of the high-frequency printed circuit board and is welded to the front side of the high-frequency printed circuit board, and the cable net is welded on the back side of the high-frequency printed circuit board and pressed into the buckle position of the bottom plate; the outer cover, after the positioning posts on the outer cover pass through the positioning holes on the bottom plate, the outer cover is fixed to the bottom plate by screws.

[0007] The above-mentioned four-port ceiling antenna of the utility model also has the following additional technical features:

[0008] Specifically, the bottom plate is circular, and the oscillator feeding point of each high-frequency printed circuit board is located on two cross-intersecting diameters of the bottom plate and is 105 mm away from the center of the circle.

[0009] Furthermore, the sensing aluminum sheet is fixed to the base plate by using self-tapping screws.

[0010] Specifically, the cable core is soldered on the high-frequency printed circuit board using an electric soldering iron and solder.

[0011] Specifically, the outer cover is also fixed to the base plate by self-tapping screws.

[0012] Beneficial effects of the utility model:

[0013] The four ports of the utility model provide more signal channels, and the manufacturing cost is reduced by the vibrator composed of a high-frequency printed circuit board and an aluminum sheet. Through the specific placement of each vibrator, the four ports all achieve electrical performance indicators such as standing wave, intermodulation, isolation, etc. within a bandwidth of 600-6000 MHz, which meet the design requirements and meet the use requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a front view of a four-port ceiling antenna according to an embodiment of the utility model;

[0015] Figure 2 It is a top view of a port ceiling antenna without an outer cover according to an embodiment of the utility model;

[0016] Figure 3 is a bottom view of a port ceiling antenna according to an embodiment of the utility model;

[0017] Figure 4 is a stereoscopic diagram of a port ceiling antenna according to an embodiment of the utility model;

[0018] Figure 5 It is a schematic diagram of the placement of the vibrator of the port ceiling antenna according to one embodiment of the utility model;

[0019] Figure 6 is a schematic diagram of a group of vibrators according to an embodiment of the utility model;

[0020] Figure 7 It is a schematic diagram of the front and back structures of a high-frequency printed circuit board according to an embodiment of the utility model;

[0021] Figure 8 It is a schematic diagram of the three-dimensional structure of an outer cover according to an embodiment of the utility model. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] like Figure 1-8 As shown, the four-port ceiling antenna of the utility model comprises: a bottom plate 1, an inductive aluminum sheet 2, a high-frequency printed circuit board 3, a cable 4 and an outer cover 5.

[0024] Among them, the induction aluminum sheets 2 include 4, each of which is fixed on the bottom plate 1; the high-frequency printed boards 3 include 4, each of which is fixed on the bottom plate 1 corresponding to each induction aluminum sheet 2, and each high-frequency printed board 3 includes the first to fourth areas (i.e. Figure 6 A, B, C and D areas in the figure), a first vibrator is printed on the back of the first area A, and a second vibrator is printed on the front of the second area B. The first vibrator, the second vibrator and the inductive aluminum sheet constitute a vibrator with a first frequency bandwidth (600-960MHz). A third vibrator is printed on the back of the third area, and a fourth vibrator is printed on the front of the fourth area. The third vibrator and the fourth vibrator constitute a vibrator with a second frequency bandwidth (1425-6000MHz), and the second frequency bandwidth is greater than the first frequency bandwidth; an inductive aluminum sheet 2 and a high-frequency printed board 3 constitute a group of vibrators, each group of vibrators is set at 90°, and four groups of vibrators constitute the antenna radiator (see Figure 2 and Figure 5 ); the cables 4 include 4 cables. After each cable 4 passes through the bottom plate 1, the cable core passes through the pad of the high-frequency printed board 3 and is welded to the front of the high-frequency printed board 3. The cable net is welded on the back of the high-frequency printed board 3 and pressed into the buckle position of the bottom plate 1; after the positioning column 51 on the outer cover 5 passes through the positioning hole 12 on the bottom plate 1, the outer cover is fixed to the bottom plate 1 with screws.

[0025] The bottom plate 1 is circular, and the oscillator feeding point of each high-frequency printed circuit board 3 is located on the two cross-intersecting diameters of the bottom plate and is 105 mm away from the center of the circle.

[0026] Specifically, Figure 5-7 As shown, the 600-6000MHz oscillator is composed of a high-frequency printed circuit board 3 and an inductive aluminum sheet 2.

[0027] like Figure 6-7As shown in the figure, the vibrator on the high-frequency printed circuit board is composed of the front and back lines superimposed together. The front line is shaped like a "fish head" and the back line is shaped like a "triangular flying wing". Among them, the protruding rectangular line combination and the rectangular blank combination are obtained through repeated calculations and experiments. Its function is to ensure that the vibrator meets the design and use requirements of the directional pattern and gain, and at the same time, the impedance matching of the vibrator. If the high-frequency printed circuit board is divided into four areas A, B, C and D, then one of the 600-960MHz vibrators can be printed on the back of area A, one 600-960MHz vibrator can be printed on the front of area B, one 1425-6000MHz vibrator can be printed on the back of area C, and one 1425-6000MHz vibrator can be printed on the front of area D. The vibrator in area A, the vibrator in area B and the inductive aluminum sheet constitute the vibrator with a frequency bandwidth of 600-960MHz of the antenna, and the vibrator in area C and the vibrator in area D constitute the vibrator with a frequency bandwidth of 1425-6000MHz of the antenna.

[0028] It should be noted that the width and bending angle of the slender feeding line shaped like a "tail" under the "fish head" shaped vibrator, as well as the 8 protruding rectangles on the line, are all obtained after repeated calculations and experiments. Its function is to further optimize the impedance matching of the vibrator so that the antenna standing wave is ≤1.8 at 600-960MHz and ≤1.7 at 1425-6000.

[0029] Similarly, the size of the inductive aluminum sheet 2 is also specific, and its function is to ensure that the oscillator meets the design and use requirements of the directivity diagram and gain, while also ensuring the impedance matching of the oscillator.

[0030] like Figure 5 As shown in the figure, an inductive aluminum sheet 2 and a high-frequency printed circuit board 3 form a group of vibrators, and the four groups of vibrators are placed in a square shape. The vibrator feeding point O is located on the two cross-intersecting diameters of the circular bottom plate of the antenna, and is 105mm away from the center of the circle. A single group of vibrators is rotated 90° clockwise with the center of the bottom plate as the axis to obtain the placement position of another group of vibrators. Similarly, four groups of vibrators are placed, and the minimum spacing between each group of vibrators is 6.1mm. This combination structure of vibrators enables the antenna's directional pattern and the isolation index between vibrators to meet the design and use requirements.

[0031] like Figure 1 As shown, one end of the cable 4 further includes a coaxial cable connector 7 and a long sheath 8 .

[0032] In the embodiment of the present utility model, Figure 2 As shown, the induction aluminum sheet 2 can be fixed on the bottom plate 1 by using self-tapping screws 11. The cable core is welded on the high-frequency printed circuit board 3 by using an electric soldering iron and solder. Figure 3 As shown, the outer cover 5 is also fixed on the base plate 1 by self-tapping screws 11.

[0033] In the utility model, the cable 4 is fixed by a specially arranged buckle to achieve the following two purposes: a. The cable is fixed so that the cable will not move and the antenna structure is more reliable; b. After the cable is fixed, when grabbing the exposed cable of the antenna or connecting the antenna port (connector), the relevant external force will not be transmitted along the cable to the connection part between the cable and the vibrator inside the antenna, thereby ensuring the stability of the connection part between the cable and the vibrator, and further ensuring the stability of the intermodulation value.

[0034] The four-port ceiling antenna of the utility model is as follows: Figure 1 As shown, the antenna can be fixed to the ceiling by using nuts 6. As another example, the antenna can also be fixed to the ceiling by using expansion screws.

[0035] The units of the dimensions in the drawings of the present invention are all mm.

[0036] In summary, according to the four-port ceiling antenna of the utility model, the four ports provide more signal channels, the vibrator composed of a high-frequency printed circuit board and an aluminum sheet reduces the manufacturing cost, and the specific placement of each vibrator enables the four ports to achieve electrical performance indicators such as standing wave, intermodulation, isolation, etc. within a bandwidth of 600-6000 MHz, which meet the design requirements and satisfy the use requirements.

[0037] In the description of the present invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0038] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0040] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A four-port ceiling antenna, characterized in that: include: Base plate; Induction aluminum sheets, the induction aluminum sheets include four induction aluminum sheets, each of which is fixed on the bottom plate; A high-frequency printed board, wherein the high-frequency printed boards include 4, each of which is fixed on the bottom plate corresponding to each inductive aluminum sheet, and each of which includes a first area, a second area, a third area, and a fourth area. A first vibrator is printed on the back of the first area, and a second vibrator is printed on the front of the second area. The first vibrator, the second vibrator, and the inductive aluminum sheet constitute a vibrator with a first frequency bandwidth. A third vibrator is printed on the back of the third area, and a fourth vibrator is printed on the front of the fourth area. The third vibrator and the fourth vibrator constitute a vibrator with a second frequency bandwidth, and the second frequency bandwidth is greater than the first frequency bandwidth. One inductive aluminum sheet and one high-frequency printed circuit board form a set of oscillators, and each set of oscillators is set at 90 degrees; Cables, including 4 cables, after each cable passes through the bottom plate, the cable core of the cable passes through the pad of the high-frequency printed board and is welded to the front of the high-frequency printed board, and the cable net is welded on the back of the high-frequency printed board and pressed into the buckle position of the bottom plate; The outer cover is fixed to the bottom plate by screws after the positioning posts on the outer cover pass through the positioning holes on the bottom plate.

2. The four-port ceiling antenna according to claim 1, characterized in that: The bottom plate is circular, and the oscillator feeding point of each high-frequency printed circuit board is located on two cross-intersecting diameters of the bottom plate and is 105 mm away from the center of the circle.

3. The four-port ceiling antenna according to claim 1, characterized in that: The induction aluminum sheet is fixed to the bottom plate by using self-tapping screws.

4. The four-port ceiling antenna according to claim 1, characterized in that: The cable core is welded on the high-frequency printed circuit board by using an electric soldering iron and solder.

5. The four-port ceiling antenna according to claim 1, characterized in that: The outer cover is also fixed to the bottom plate by self-tapping screws.

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