Broadband dual-polarized small-size ceiling antenna

Abstract

The utility model provides a broadband dual-polarized small-size ceiling antenna. The broadband dual-polarized small-size ceiling antenna comprises a large lower cone radiation oscillator, a small upper cone radiation oscillator; the plurality of horizontal radiation oscillators are arranged in a circular array to form a circular array horizontal radiation oscillator, and the circular array horizontal radiation oscillator is arranged between the large lower cone radiation oscillator and the small upper cone radiation oscillator; one end of the horizontal polarization cable transmission port is connected to the bottom of the circular array horizontal radiation oscillator, and the other end of the horizontal polarization cable transmission port penetrates through the small upper cone radiation oscillator; and one end of the vertical polarization cable transmission port is connected to the bottom of the large lower cone radiation oscillator, and the other end of the vertical polarization cable transmission port penetrates through the circular array horizontal radiation oscillator and the small upper cone radiation oscillator. According to the invention, various indexes of the internal antenna can meet the requirements of mobile communication technical specifications while the broadband dual-polarization small-size ceiling antenna is reduced.

Description

Technical Field

[0001] This utility model relates to the field of antenna technology, and in particular to a wideband dual-polarized small-size ceiling antenna. Background Technology

[0002] With the development of mobile communication, dual-polarized antennas are currently one of the main application areas. Dual-polarized antennas can simultaneously receive and transmit signals in both horizontal and vertical polarization directions, ensuring more stable and reliable communication quality. Dual-polarized antennas can also transmit signals in different frequency bands, making them suitable for different communication standards and frequency band requirements.

[0003] In the existing technology, dual-polarized ceiling antennas are all large-sized products, with diameters generally around Ф200 or Ф180, resulting in excessively high costs. When the dual-polarized ceiling antenna is reduced in size, it becomes difficult for the antenna's internal indicators to meet the requirements of mobile communication technology specifications. Summary of the Invention

[0004] Therefore, the purpose of this utility model is to provide a wideband dual-polarized small-size ceiling antenna to overcome the shortcomings of the prior art.

[0005] This invention provides a wideband dual-polarized small-size ceiling antenna, comprising:

[0006] Large lower cone radiating oscillator;

[0007] The small upper conical radiating oscillator is disposed below the large lower conical radiating oscillator;

[0008] A plurality of horizontal radiating oscillators are arranged in a circular array to form a circular array of horizontal radiating oscillators, which are disposed between the large lower cone radiating oscillator and the small upper cone radiating oscillator.

[0009] A horizontally polarized cable transmission port, one end of which is connected to the bottom of the circular array horizontal radiating vibrator, and the other end of which passes through the small upper conical radiating vibrator;

[0010] A vertically polarized cable transmission port, one end of which is connected to the bottom of the large lower conical radiating vibrator, and the other end of which passes through the circular array horizontal radiating vibrator and the small upper conical radiating vibrator.

[0011] Compared with the prior art, the beneficial effects of the present invention are: by using a circular array of horizontal radiating elements composed of a large lower conical radiating element, a small upper conical radiating element, and several horizontal radiating elements, the internal antenna performance can still meet the requirements of mobile communication technical specifications when reducing the size of the wideband dual-polarized small-size ceiling antenna.

[0012] Furthermore, the wideband dual-polarized small-size ceiling antenna also includes an outer cover, which covers the large lower conical radiating element, the small upper conical radiating element, and the circular array horizontal radiating element.

[0013] Furthermore, the diameter of the outer cover is 150mm to 170mm, and the height of the outer cover is 118mm to 110mm.

[0014] Furthermore, the large lower cone radiating oscillator is configured with a cone-shaped structure.

[0015] Furthermore, the height of the large lower conical radiating oscillator is 32mm to 48mm, the bottom diameter of the large lower conical radiating oscillator is 145mm to 165mm, and the angle inside the top of the large lower conical radiating oscillator is 116° to 121°.

[0016] Furthermore, the bottom of the small upper conical radiating oscillator is provided with a protruding structure.

[0017] Furthermore, a PCB substrate is provided between the large lower conical radiating oscillator and the small upper conical radiating oscillator, and a plurality of the horizontal radiating oscillators are disposed on the PCB substrate.

[0018] Furthermore, the upper surface of the PCB substrate is copper-clad and has 5 sets of half-wave oscillators.

[0019] Furthermore, the lower surface of the PCB substrate is copper-clad and has 5 sets of coupled-feed microstrip lines.

[0020] Furthermore, the coupled-feed microstrip line is connected to the horizontally polarized cable transmission port and the vertically polarized cable transmission port via an impedance transformation line. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the wideband dual-polarized small-size ceiling antenna in this embodiment of the present invention;

[0022] Figure 2 This is a cross-sectional view of the small upper cone radiating oscillator in an embodiment of the present invention;

[0023] Figure 3 This is a bottom view of the small upper cone radiating oscillator in an embodiment of this utility model;

[0024] Figure 4 This is a schematic diagram of the structure of the large lower cone radiating oscillator in an embodiment of this utility model;

[0025] Figure 5 This is a schematic diagram of the structure of the small upper cone radiating oscillator and the large lower cone radiating oscillator in the embodiments of this utility model;

[0026] Figure 6 This is a schematic diagram of the gain direction of the wideband dual-polarized small-size ceiling antenna in this embodiment of the invention. Figure 1 ;

[0027] Figure 7 This is a schematic diagram of the gain direction of the wideband dual-polarized small-size ceiling antenna in this embodiment of the invention. Figure 2 ;

[0028] Figure 8 This is a schematic diagram of the gain direction of the wideband dual-polarized small-size ceiling antenna in this embodiment of the present invention. Figure 3 ;

[0029] Figure 9 This is a schematic diagram of the gain direction of the wideband dual-polarized small-size ceiling antenna in this embodiment of the invention. Figure 4 ;

[0030] Figure 10 This is a schematic diagram of the gain direction of the wideband dual-polarized small-size ceiling antenna in an embodiment of the present invention. Figure 5 ;

[0031] Figure 11 This is a three-dimensional schematic diagram of the gain direction of the wideband dual-polarized small-size ceiling antenna in this embodiment of the present invention. Figure 1 ;

[0032] Figure 12 This is a three-dimensional schematic diagram of the gain direction of the wideband dual-polarized small-size ceiling antenna in this embodiment of the present invention. Figure 2 ;

[0033] Figure 13 This is a three-dimensional schematic diagram of the gain direction of the wideband dual-polarized small-size ceiling antenna in this embodiment of the invention. Figure 3 ;

[0034] Figure 14 This is a schematic diagram of the PCB substrate structure in an embodiment of the present invention. Figure 1 ;

[0035] Figure 15 This is a schematic diagram of the PCB substrate structure in an embodiment of the present invention. Figure 2 ;

[0036] Figure 16 This is a schematic diagram of the PCB substrate structure in an embodiment of the present invention. Figure 3 ;

[0037] Figure 17 This is a schematic diagram of the PCB substrate structure in an embodiment of the present invention. Figure 4 ;

[0038] Figure 18This is a three-dimensional schematic diagram of the gain direction of the wideband dual-polarized small-size ceiling antenna in an embodiment of the present invention. Figure 4 ;

[0039] Figure 19 This is a three-dimensional schematic diagram of the gain direction of the wideband dual-polarized small-size ceiling antenna in an embodiment of the present invention. Figure 5 ;

[0040] Figure 20 This is a three-dimensional schematic diagram of the gain direction of the wideband dual-polarized small-size ceiling antenna in an embodiment of the present invention. Figure 6 ;

[0041] Figure 21 This is a three-dimensional schematic diagram of the gain direction of the wideband dual-polarized small-size ceiling antenna in an embodiment of the present invention. Figure 7 ;

[0042] Figure 22 This is a schematic diagram of the structure of the small upper cone radiating oscillator, the large lower cone radiating oscillator, and the PCB substrate in an embodiment of the present invention;

[0043] Figure 23 This is a schematic diagram of the PCB substrate structure in an embodiment of the present invention. Figure 5 .

[0044] Explanation of key component symbols:

[0045] 1. Outer casing; 2. Large lower conical radiating vibrator; 3. Small upper conical radiating vibrator; 4. Horizontal radiating vibrator; 5. Horizontally polarized cable transmission port; 6. Vertically polarized cable transmission port;

[0046] 31. Raised structure; 41. Half-wave oscillator; 42. Coupled-fed microstrip line; 43. Microstrip feed grid; 44. Impedance transformation line.

[0047] The following detailed description, in conjunction with the accompanying drawings, will further illustrate the present invention. Detailed Implementation

[0048] To facilitate understanding of this invention, a more complete description will be given below with reference to the accompanying drawings. Several embodiments of the invention are shown in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to make the disclosure of the invention more thorough and complete.

[0049] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0050] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0051] Please see Figures 1 to 5 The image shows a wideband dual-polarized small-size ceiling antenna in an embodiment of the present invention, including a large lower conical radiating element 2, a small upper conical radiating element 3, a horizontal radiating element 4, a horizontally polarized cable transmission port 5, and a vertically polarized cable transmission port 6.

[0052] The small upper conical radiating oscillator 3 is positioned below the large lower conical radiating oscillator 2. Several groups of horizontal radiating oscillators 4 are arranged in a circular array to form a circular array of horizontal radiating oscillators. This circular array is positioned between the large lower conical radiating oscillator 2 and the small upper conical radiating oscillator 3. One end of the horizontal polarization cable transmission port 5 is connected to the bottom of the circular array of horizontal radiating oscillators, and the other end passes through the small upper conical radiating oscillator 3. One end of the vertical polarization cable transmission port 6 is connected to the bottom of the large lower conical radiating oscillator 2, and the other end passes through both the circular array of horizontal radiating oscillators and the small upper conical radiating oscillator 3. It should be noted that there are five groups of horizontal radiating oscillators. The large lower conical radiating oscillator 2, the small upper conical radiating oscillator 3, and the circular array of horizontal radiating oscillators are covered by an outer casing 1.

[0053] Specifically, in this embodiment, the diameter of the outer cover 1 is 160mm and the height of the outer cover 1 is 110mm. In other optional embodiments, the diameter of the outer cover 1 can be selected in the range of 150mm to 170mm, and the height of the outer cover 1 can be selected in the range of 118mm to 110mm.

[0054] Specifically, in this embodiment, the large lower conical radiating oscillator 2 is a conical structure with a height of 45mm, a bottom diameter of 150mm, and an inner angle at the top of 120°. In other optional embodiments, the height of the large lower conical radiating oscillator 2 can be selected from the range of 32mm to 48mm, the bottom diameter from 145mm to 165mm, and the inner angle at the top of 116° to 121°.

[0055] Furthermore, the bottom of the small upper conical radiating element 3 is provided with a protruding structure 31. This allows it to better reflect electromagnetic waves with the large lower conical radiating element 2. By limiting the angle of the two arms of the upper and lower cones to be different, an asymmetric biconical antenna is formed; this can effectively adjust the radiation direction of the electromagnetic wave signal, thereby adjusting the gain, roundness, and cross-polarization ratio (roundness) of the electromagnetic wave signal in different frequency bands. Correspondingly, through the mutual coordination of the three elements of cone angle, height, and maximum diameter of the lower cone, specifically as follows... Figure 4 As shown, signal reception and transmission are then performed through the vertically polarized cable transmission port. This allows the vertically polarized omnidirectional antenna to meet the following mobile vertical polarization performance requirements within a relatively small size: antenna gain greater than 1 dBi in the 880–960 MHz band, greater than 2 dBi in the 1710–1850 MHz band, and greater than or equal to 3 dBi in the 1850–2700 MHz band; low-frequency roundness less than 1.0 dB in the 880–960 MHz band, and high-frequency roundness less than 1.5 dB in the 1710–2700 MHz band; cross-polarization ratio (roundness) greater than 13 dB in the 880–960 MHz band, and greater than 13 dB in the 1710–2700 MHz band. Figures 6 to 13 As shown.

[0056] Specifically, in this embodiment, a PCB substrate is provided between the large lower conical radiating oscillator 2 and the small upper conical radiating oscillator 3, and a plurality of horizontal radiating oscillators 4 are disposed on the PCB substrate. The upper surface of the PCB substrate is copper-clad and has 5 sets of half-wave oscillators 41, as detailed below. Figure 14 As shown, the lower surface of the PCB substrate is copper-clad and has 5 sets of coupled-feed microstrip lines 42, specifically as follows: Figure 15 As shown, the coupled-feed microstrip line 42 is connected to the horizontally polarized cable transmission port and the vertically polarized cable transmission port via an impedance transformation line 44, so as to propagate the radiated electromagnetic waves through the horizontally polarized cable transmission port and the vertically polarized cable transmission port, specifically as follows: Figures 16 to 17 As shown.

[0057] It needs to be explained that, firstly, a half-wave dipole is designed based on the frequency band bandwidth, and the circular array arrangement is calculated. Then, a coupled-feed microstrip line 42 is designed to construct a complete radiating half-wave dipole 41. Next, a feed network microstrip line 43 is designed, and the matching resistance is adjusted using an impedance transformation line 44. Simulation software is used to calculate that for the same microstrip line length, the phase output signal peaks are basically the same. Then, for the same microstrip line width, the output power ratio is basically equal. Finally, the designed microstrip feed network is connected to five sets of coupled-feed microstrip lines to form a complete network, constructing a complete horizontally polarized antenna, such as... Figure 17 As shown, the following mobile horizontal polarization technical specifications must be met: antenna gain greater than or equal to 2.5 dBi in the 1880-2700 MHz band; high-frequency circularity less than 2.0 dB in the 1880-2700 MHz band; cross-polarization ratio (circularity) greater than 11 dB in the 1880-2700 MHz band. Figures 18-21 As shown.

[0058] It is worth noting that, to meet the S-parameter requirements, the current capacitance and resistance performance of the microstrip feed network 43 were modified. Lengthening or widening the microstrip line would improve the S-parameters, but would alter the phase and power ratio exponents, worsening the pattern roundness and cross-polarization ratio, thus failing to meet mobile communication specification requirements. Through verification using the superposition method and adjustable S-parameters, the phase and power ratio of the network microstrip line were not affected. The S-parameters, pattern roundness, and cross-polarization ratio all met the mobile communication specification requirements. Furthermore, the orthogonal radiating elements of the horizontally polarized cable transmission port and the vertically polarized cable transmission port were combined to form a complete dual-polarized omnidirectional ceiling-mounted antenna, such as... Figure 1 As shown.

[0059] In summary, the broadband dual-polarized small-size ceiling antenna in the above embodiments of this utility model has one port for vertically polarized transmission and reception of radiated signals, and the other port for horizontally polarized transmission and reception of radiated signals, realizing the transmission and reception of radio waves in different directions. Its basic principle is to set two orthogonal radiating elements on the antenna, responsible for signal transmission in the horizontal and vertical directions respectively. This dual-polarized antenna not only achieves omnidirectional transmission but also better adapts to different geographical environments and signal transmission requirements. The vertical polarization is composed of irregularly shaped asymmetrical biconical dipoles, with a small upper conical radiating dipole 3 and a large lower conical radiating dipole 2 forming the vertical polarization radiating unit. The signal is then output through the port via a cable, achieving vertical polarization radiation coverage. The horizontal polarization dipoles consist of five sets of half-wave dipoles 41 and a coupled feed network. The half-wave dipoles 41 are five sets of dipoles forming a circular array, connected by a microstrip feed network. The signal is then output through the port via a cable, achieving 360-degree horizontal polarization radiation coverage. Figure 22 and Figure 23As shown. The market demand for large-size dual-polarized ceiling antennas, typically around Ф200 or Ф180 mm in diameter, is being addressed. Existing designs suffer from high costs and poor performance stability, particularly horizontally polarized antennas with a circularity greater than 2.5, failing to meet mobile communication technical specifications. A new lightweight, small-size dual-polarized ceiling antenna with a diameter less than Ф165 mm is being designed, minimizing its size while ensuring that all internal antenna specifications meet mobile communication technical requirements.

[0060] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0061] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A wideband dual-polarized small-size ceiling-mounted antenna, characterized in that, include: Large lower cone radiating oscillator; The small upper conical radiating oscillator is disposed below the large lower conical radiating oscillator; A plurality of horizontal radiating oscillators are arranged in a circular array to form a circular array of horizontal radiating oscillators, which are disposed between the large lower cone radiating oscillator and the small upper cone radiating oscillator. A horizontally polarized cable transmission port, one end of which is connected to the bottom of the circular array horizontal radiating vibrator, and the other end of which passes through the small upper conical radiating vibrator; A vertically polarized cable transmission port, one end of which is connected to the bottom of the large lower conical radiating vibrator, and the other end of which passes through the circular array horizontal radiating vibrator and the small upper conical radiating vibrator.

2. The wideband dual-polarized small-size ceiling antenna according to claim 1, characterized in that, The wideband dual-polarized small-size ceiling antenna also includes an outer cover, which covers the large lower conical radiating element, the small upper conical radiating element, and the circular array horizontal radiating element.

3. The wideband dual-polarized small-size ceiling antenna according to claim 2, characterized in that, The diameter of the outer cover is 150mm to 170mm, and the height of the outer cover is 118mm to 110mm.

4. The wideband dual-polarized small-size ceiling antenna according to claim 1, characterized in that, The large lower cone radiating oscillator is configured with a cone-shaped structure.

5. The wideband dual-polarized small-size ceiling antenna according to claim 4, characterized in that, The height of the large lower conical radiating oscillator is 32mm to 48mm, the bottom diameter of the large lower conical radiating oscillator is 145mm to 165mm, and the angle inside the top of the large lower conical radiating oscillator is 116° to 121°.

6. The wideband dual-polarized small-size ceiling antenna according to claim 1, characterized in that, The bottom of the small upper cone radiating oscillator is provided with a protruding structure.

7. The wideband dual-polarized small-size ceiling antenna according to claim 1, characterized in that, A PCB substrate is provided between the large lower conical radiating oscillator and the small upper conical radiating oscillator, and a plurality of the horizontal radiating oscillators are disposed on the PCB substrate.

8. The wideband dual-polarized small-size ceiling antenna according to claim 7, characterized in that, The upper surface of the PCB substrate is copper-clad and has 5 sets of half-wave oscillators.

9. The wideband dual-polarized small-size ceiling antenna according to claim 7, characterized in that, The lower surface of the PCB substrate is copper-clad and has 5 sets of coupled-feed microstrip lines.

10. The wideband dual-polarized small-size ceiling-mounted antenna according to claim 9, characterized in that, The coupled-feed microstrip line is connected to the horizontally polarized cable transmission port and the vertically polarized cable transmission port via an impedance transformation line.

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