470-960 MHz frequency band ceiling antenna

Abstract

The utility model discloses a 470-960MHz frequency band ceiling antenna, comprising an antenna unit which is deformed by a dipole antenna to form a broadband antenna; the antenna unit is fixed on the antenna reflecting plate, and the height between the antenna main body and the reflecting plate is limited; the coupling array subunits are arranged on the reflecting plate, and the broadband antenna with the frequency band of 470-960 MHz is further obtained by adjusting the length and the distance between the coupling array subunits. The antenna provided by the utility model has the broadband characteristic of covering the frequency band of 470-960MHz, the antenna is arranged on an indoor ceiling through wall, the radiation direction of the antenna meets the requirement of downward 100-120-degree horizontal radiation, and no signal blind area exists when the antenna is used.

Description

Technical Field

[0001] The utility model relates to the field of UHF frequency band wireless communication systems, in particular to a 470-960 MHz frequency band ceiling antenna. Background Art

[0002] With technological advancements, the UHF frequency band is increasingly being used in a wide range of venues, including large conference systems, stages, shopping malls, hotels, and subways. Antenna design primarily requires coverage of the 470-960MHz wideband. Ceiling-mount antennas are primarily designed for installation on ceilings or walls, offering a compact, aesthetically pleasing design that minimizes visual impact, wide signal coverage, and low power consumption. Professional wireless transmission projects can achieve virtually no signal fading in even the most complex performance or conference environments, providing long transmission distances, excellent anti-interference performance, and the most stable signal reception. Utility Model Content

[0003] The technical problem to be solved by the present invention is to provide a 470-960 MHz frequency band ceiling antenna to solve the problems existing in the background technology.

[0004] The utility model 470-960MHz frequency band ceiling antenna is realized by the following technical solutions, including:

[0005] An antenna unit, wherein the antenna unit is formed into a broadband antenna by deforming a dipole antenna;

[0006] An antenna reflector, wherein the antenna unit is fixed on the antenna reflector, and the height between the antenna body and the reflector is limited;

[0007] The coupling array unit is arranged on the reflector. By adjusting the length and spacing between the coupling array units, a broadband antenna with a frequency band of 470-960 MHz is obtained.

[0008] As a preferred technical solution, the antenna body includes a first antenna body and a second antenna body; the first antenna body and the second antenna body are deformed into a broadband antenna through a dipole antenna and are installed on an antenna reflector.

[0009] As a preferred technical solution, the coupling array unit includes a low-frequency coupling array and a high-frequency coupling array;

[0010] The low-frequency band coupling array and the high-frequency band coupling array are both arranged on the antenna reflector. By adjusting the length and spacing of the low-frequency band coupling array and the high-frequency band coupling array, a 470-960 MHz frequency band broadband antenna is obtained.

[0011] As a preferred technical solution, a low-noise amplifier PCB is installed on the antenna reflector, and the low-noise amplifier PCB includes a gain control circuit and an overload indication circuit;

[0012] The antenna unit is provided with a soldering pad, and a coaxial line is soldered on the soldering pad, which is connected to the input end of the low-noise amplifier PCB board through the coaxial line.

[0013] As a preferred technical solution, the antenna reflector is also equipped with a signal over-strength indicator light and an antenna gain control indicator light;

[0014] The signal over-strength indicator light corresponds to the overload indication circuit, and the antenna gain control indicator light corresponds to the gain control circuit.

[0015] As a preferred technical solution, it also includes an antenna housing;

[0016] The antenna housing comprises an antenna bottom shell and an antenna top shell, wherein the antenna reflector is mounted on the antenna bottom shell, the antenna top shell covers the antenna bottom shell, and the antenna reflector and the antenna unit are covered in the antenna top shell.

[0017] As a preferred technical solution, a mounting bracket is installed at the bottom of the antenna bottom shell, and is connected to the ceiling through the mounting bracket.

[0018] As an optimal technical solution, a coaxial cable outlet hole and an anti-fall wire rope fixing hole are provided on the antenna bottom shell. The coaxial cable connected to the antenna reflector plate passes through the coaxial cable outlet hole and is connected to the external module; an anti-fall wire rope is fixed on the anti-fall wire rope fixing hole, and the other end of the anti-fall wire rope is fixed on the ceiling.

[0019] As a preferred technical solution, the first antenna body and the second antenna body are connected to the transmitting plate via screw columns.

[0020] The beneficial effects of the utility model are:

[0021] The utility model antenna has a broadband characteristic covering the 470-960MHz frequency band. The antenna is installed on the indoor ceiling or wall. The radiation direction of the antenna satisfies the horizontal radiation of 100~120 degrees downward, and there will be no signal blind spot when in use.

[0022] In order to solve the complex indoor wireless communication requirements, the utility model is equipped with an antenna amplification circuit system and a gain adjustable control system inside the antenna to meet different communication distance requirements. When the transmitter is close, it can be switched to negative gain to prevent the signal from being too strong and causing self-excitation and howling. When the transmitter is far away from the antenna or the power is weak, it can be switched to high gain to meet the long-distance communication requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 This is a schematic plan view of the antenna installation structure of the present invention;

[0025] Figure 2 This is a schematic diagram of the three-dimensional structure of the antenna installation of the present invention;

[0026] Figure 3 This is a schematic diagram of the antenna bottom shell structure of the present utility model;

[0027] Figure 4 It is a schematic diagram of the three-dimensional structure of the utility model;

[0028] Figure 5 This is a schematic diagram of the return loss test results of the antenna of the present invention;

[0029] Figure 6 This is a schematic diagram of the voltage standing wave ratio test results of the antenna of the present utility model;

[0030] Figure 7 This is the radiation pattern of the antenna of the present invention.

[0031] Description of reference numerals:

[0032] 1. First antenna body; 2. Second antenna body; 3. Low-frequency coupling array; 4. High-frequency coupling array; 5. Low-noise amplifier PCB; 6. Screw column; 7. Signal overload indicator; 8. Antenna gain control indicator; 9. Low-noise amplifier PCB; 10. Antenna top shell; 11. Antenna bottom shell; 12. Coaxial cable outlet hole; 13. Anti-fall wire rope fixing hole; 14. Mounting bracket; 15. Solder pad. DETAILED DESCRIPTION

[0033] All features disclosed in this specification, or all steps in the disclosed methods or processes, except mutually exclusive features and / or steps, can be combined in any manner.

[0034] like Figure 1-Figure 2 As shown, the utility model is a 470-960MHz frequency band ceiling antenna, comprising:

[0035] An antenna unit, wherein the antenna unit is formed into a broadband antenna by deforming a dipole antenna;

[0036] Antenna reflector, the antenna unit is fixed on the antenna reflector, and the height between the antenna body and the reflector is limited; due to the height limitation, the voltage standing wave ratio of the antenna will deteriorate;

[0037] The coupling array unit is arranged on the reflector. By adjusting the length and spacing between the coupling array units, good matching can be achieved, thereby obtaining a broadband antenna in the 470-960MHz frequency band.

[0038] The antenna body includes a first antenna body 1 and a second antenna body 2. The first antenna body 1 and the second antenna body 2 are deformed into a broadband antenna through a dipole antenna and are installed on an antenna reflector.

[0039] The coupling array unit includes a low-frequency coupling array 3 and a high-frequency coupling array 4;

[0040] The low-band coupling array 3 and the high-band coupling array 4 are both arranged on the antenna reflector. By adjusting the length and spacing of the low-band coupling array 3 and the high-band coupling array 4, good matching can be achieved, thereby obtaining a 470-960MHz frequency band broadband antenna.

[0041] Wherein, a low noise amplifier PCB board 9 is installed on the antenna reflector, and the low noise amplifier PCB board 9 includes a gain control circuit and an overload indication circuit;

[0042] The antenna unit is provided with a soldering pad 15 , and a coaxial line is soldered on the soldering pad 15 , which is connected to the input end of the low noise amplifier PCB board 9 via the coaxial line.

[0043] The antenna reflector is also equipped with a signal over-strength indicator light 7 and an antenna gain control indicator light 8;

[0044] The signal over-strength indicator light 7 corresponds to the overload indication circuit, and the antenna gain control indicator light 8 corresponds to the gain control circuit.

[0045] like Figure 3-Figure 4 As shown, it also includes an antenna housing;

[0046] The antenna housing includes an antenna bottom shell 11 and an antenna top shell 10 , and the antenna reflector is installed on the antenna bottom shell 11 , and the antenna top shell 10 covers the antenna bottom shell 11 , and the antenna reflector and the antenna unit are covered in the antenna top shell 10 .

[0047] In addition, a mounting bracket 14 is installed at the bottom of the antenna bottom shell 11 , and is connected to the ceiling through the mounting bracket 14 .

[0048] In addition, a coaxial cable outlet hole 12 and an anti-fall wire rope fixing hole 13 are provided on the antenna bottom shell 11. The coaxial cable connected to the antenna reflector plate passes through the coaxial cable outlet hole 12 and is connected to the external module; an anti-fall wire rope is fixed on the anti-fall wire rope fixing hole 13, and the other end of the anti-fall wire rope is fixed on the ceiling to prevent it from falling.

[0049] In addition, the first antenna body 1 and the second antenna body 2 are connected to the radiating plate via screw columns 6 .

[0050] When the transmitter (such as a wireless microphone) is close to the antenna or the power is too strong, the overload indicator light will light up and the gain gear will be manually switched to a low gear of -6db~0db. When the transmitter is far away from the antenna, the gear can be switched to 12db to enhance the weak signal caused by the long receiving distance, compensate for the loss of transmission distance between the antenna and the receiver, and ensure that the distributor obtains the necessary input power in the shared antenna system, so as to improve the reception quality and enable the wireless microphone to have a longer transmission distance.

[0051] Figure 3 and Figure 4 The antenna return loss and voltage standing wave ratio results of the antenna network analyzer tested by the utility model show that the voltage standing wave ratio basically meets the requirement of <3 in the 470-960MHz frequency band, and the data in the high frequency band is slightly worse, which meets the broadband characteristics of the antenna.

[0052] As shown in the following table:

[0053]

[0054] The gain and efficiency of the antenna were measured in a microwave darkroom. The results showed that the antenna had a maximum gain of 5.2dbi and a maximum radiation efficiency of 76%.

[0055] Figure 5 are the 2D and 3D radiation patterns of the antenna. The radiation angle of the antenna is about 120°, and the polarization mode of the antenna is horizontal polarization.

[0056] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that do not require creative effort should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection defined in the claims.

Claims

1. A 470-960MHz frequency band ceiling antenna, characterized in that: include: An antenna unit, wherein the antenna unit is formed into a broadband antenna by deforming a dipole antenna; An antenna reflector, wherein the antenna unit is fixed on the antenna reflector, and the height between the antenna body and the reflector is limited; The coupling array unit is arranged on the reflector. By adjusting the length and spacing between the coupling array units, a broadband antenna with a frequency band of 470-960 MHz is obtained.

2. The 470-960 MHz frequency band ceiling antenna according to claim 1, characterized in that: The antenna body comprises a first antenna body (1) and a second antenna body (2); a broadband antenna is formed between the first antenna body (1) and the second antenna body (2) through the deformation of a dipole antenna and is installed on an antenna reflector.

3. The 470-960 MHz frequency band ceiling antenna according to claim 1, characterized in that: The coupling array unit includes a low-frequency-band coupling array (3) and a high-frequency-band coupling array (4); The low-frequency-band coupling array (3) and the high-frequency-band coupling array (4) are both arranged on the antenna reflector. By adjusting the length and spacing of the low-frequency-band coupling array (3) and the high-frequency-band coupling array (4), a 470-960 MHz frequency-band broadband antenna is obtained.

4. The 470-960 MHz frequency band ceiling antenna according to claim 1, characterized in that: A low-noise amplifier PCB board (9) is mounted on the antenna reflector, and the low-noise amplifier PCB board (9) includes a gain control circuit and an overload indication circuit; A soldering pad (15) is provided on the antenna unit, and a coaxial line is welded on the soldering pad (15), which is connected to the input end of a low-noise amplifier PCB board (9) via the coaxial line.

5. The 470-960 MHz frequency band ceiling antenna according to claim 1, characterized in that: The antenna reflector is also provided with a signal over-strength indicator light (7) and an antenna gain control indicator light (8); The signal over-strength indicator light (7) corresponds to the overload indication circuit, and the antenna gain control indicator light (8) corresponds to the gain control circuit.

6. The 470-960 MHz frequency band ceiling antenna according to claim 1, characterized in that: Also includes an antenna housing; The antenna housing comprises an antenna bottom shell (11) and an antenna top shell (10), wherein the antenna reflector is mounted on the antenna bottom shell (11), the antenna top shell (10) covers the antenna bottom shell (11), and the antenna reflector and the antenna unit are covered in the antenna top shell (10).

7. The 470-960 MHz frequency band ceiling antenna according to claim 6, characterized in that: A mounting bracket (14) is installed at the bottom of the antenna bottom shell (11) and is connected to the ceiling via the mounting bracket (14).

8. The 470-960 MHz frequency band ceiling antenna according to claim 6, characterized in that: The antenna bottom shell (11) is provided with a coaxial cable outlet hole (12) and an anti-falling steel wire rope fixing hole (13); the coaxial cable connected to the antenna reflector passes through the coaxial cable outlet hole (12) and is connected to the external module; the anti-falling steel wire rope fixing hole (13) is fixed with an anti-falling steel wire rope, and the other end of the anti-falling steel wire rope is fixed to the ceiling.

9. The 470-960 MHz frequency band ceiling antenna according to claim 2, characterized in that: The first antenna body (1) and the second antenna body (2) are connected to the transmitting plate via screw columns (6).

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