Built-in antenna type street light structure

Abstract

The present invention discloses a built-in antenna type street lamp structure, including a lamp holder and a lamp base, a lamp pole is connected between the lamp holder and the lamp base, the lamp pole also serves as an antenna body, an omnidirectional antenna is installed in the antenna body; the lamp base is fixed to a cement foundation by anchor bolts, a wiring tube is arranged in the cement foundation; the omnidirectional antenna includes a dielectric substrate, a plurality of groups of radiation units are arranged on the dielectric substrate, any radiation unit includes a first radiation arm arranged on the front of the dielectric substrate and a second radiation arm arranged on the back of the dielectric substrate, the first radiation arm and the second radiation arm are arranged symmetrically up and down, and a feeding device for connecting a cable device is arranged between the two. The present invention can achieve signal coverage of the 806-960MHz frequency band while meeting normal lighting requirements, and has the advantages of good concealment, small size, light weight, and low cost, which can greatly reduce the panic of community residents about the electromagnetic environment.

Description

Technical Field

[0001] The present invention belongs to the technical field of lighting and wireless communication, and in particular relates to a street lamp structure with a built-in antenna. Background Art

[0002] With the continuous development of all walks of life and the increasing pace of urban construction, base station signals are often difficult to fully cover in cities with high-rise buildings. Outdoor distributed antennas, as transit stations for base station signals, can effectively provide all-round coverage of communities in complex environments.

[0003] The coverage effect of traditional base station signal relay reception, directional antennas installed on the wall, or low-gain omnidirectional antennas is not very ideal. Therefore, if a high-gain, omnidirectional coverage and low-cost antenna can be provided, it will definitely be adopted by major operators.

[0004] Based on this, the present invention provides a street lamp structure with a built-in antenna. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a built-in antenna type street lamp structure which can realize both lighting and omnidirectional signal coverage.

[0006] In order to solve the above technical problems, the technical solution of the present invention is: a built-in antenna type street lamp structure, including a lamp head and a lamp holder, a lamp pole is connected between the lamp head and the lamp holder, the lamp pole also serves as an antenna body, and an omnidirectional antenna is installed in the antenna body; the lamp holder is fixed to the cement foundation by anchor bolts, and a wiring tube for power supply and signal transmission is provided in the cement foundation.

[0007] As a preferred technical solution, the omnidirectional antenna includes a dielectric substrate, on which a plurality of groups of radiating units are arranged, any of the radiating units including a first radiating arm arranged on the front side of the dielectric substrate and a second radiating arm arranged on the back side of the dielectric substrate, the first radiating arm and the second radiating arm being arranged symmetrically up and down and a feeding device for connecting a cable device is provided between the two.

[0008] As a preferred technical solution, the first radiating arm includes a first equilateral triangle patch, a first lower rectangular patch perpendicular to the bottom edge of the first equilateral triangle patch is connected below the first equilateral triangle patch, and first side rectangular patches perpendicular to the bottom edge of the first equilateral triangle patch are symmetrically connected on both sides of the first equilateral triangle patch.

[0009] As a preferred technical solution, the second radiating arm includes a second inverted triangular patch, a second upper rectangular patch perpendicular to the bottom edge of the second inverted triangular patch is connected below the second inverted triangular patch, and second side rectangular patches perpendicular to the bottom edge of the second inverted triangular patch are symmetrically connected on both sides of the second inverted triangular patch.

[0010] As a preferred technical solution, the feeding device includes a feeding rectangular patch connected to the top of the first equilateral triangle patch, the top of the feeding rectangular patch is also connected to a feeding circular patch, a first circular hole connected to the cable device is provided in the feeding circular patch, and a second circular hole connected to the cable device is provided at the lower part of the second inverted triangle patch.

[0011] As a preferred technical solution, the cable device includes a coaxially arranged cable outer conductor and a cable inner conductor, the cable outer conductor passes through the second circular hole to be connected to the second radiating arm, and the cable inner conductor extends out of the cable outer conductor and passes through the dielectric substrate and the first circular hole in turn to be connected to the first radiating arm.

[0012] As a preferred technical solution, a first long strip hole is further provided in the first equilateral triangle patch; and a second long strip hole is further provided in the second inverted triangle patch.

[0013] As a preferred technical solution, the dielectric substrate is configured as a FR4 substrate.

[0014] As a preferred technical solution, the lamp holder is an LED lamp, a light sensor and a sound sensor are arranged inside the lamp holder, and a street lamp controller connected to the light sensor and the sound sensor is also arranged inside the lamp holder.

[0015] As a preferred technical solution, a fiberglass outer cover is provided outside the antenna body.

[0016] Due to the adoption of the above technical solution, the lamp pole also serves as an antenna body, an omnidirectional antenna is installed in the antenna body; the lamp holder is fixed to the cement foundation by anchor bolts, and a wiring tube for power supply and signal transmission is provided in the cement foundation; the beneficial effects of the present invention are:

[0017] (1) The present invention can achieve signal coverage in the 806-960MHz frequency band while meeting normal lighting requirements. By forming an array of radiation units, the antenna gain can be greatly improved, the standing wave ratio can be reduced, the antenna debugging time can be reduced, and the production efficiency can be improved.

[0018] (2) The antenna's radiating unit adopts a microstrip patch structure, which has the advantages of low profile, small size, light weight and low cost. When formed into an array antenna, it can achieve 360° omnidirectional coverage on the horizontal plane;

[0019] (3) It also has the advantages of good concealment, small size, light weight, low cost, simple production, and easy mass production. It can also greatly reduce the panic of community residents about the electromagnetic environment.

[0020] (4) Breaking through the limitation of single-band system radiation of traditional omnidirectional antennas, solving the problems of difficult processing, difficult debugging, high cost and poor performance of traditional omnidirectional antennas, and realizing multi-band and wide-band omnidirectional radiation;

[0021] (5) The wide frequency band coverage of the antenna can make up for the shortcomings of the narrow frequency band of the same type of antenna, meet the needs of telecommunications equipment manufacturers for coverage of multiple communication frequency bands, and also meet the low cost and high performance requirements of equipment operators. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The following drawings are intended only to illustrate and explain the present invention, and are not intended to limit the scope of the present invention.

[0023] Figure 1 is a schematic structural diagram of an embodiment of the present invention;

[0024] Figure 2 is a schematic structural diagram of the front side of the omnidirectional antenna according to an embodiment of the present invention;

[0025] Figure 3 is a schematic structural diagram of the back side of the omnidirectional antenna according to an embodiment of the present invention;

[0026] Figure 4 is a schematic structural diagram of the front side of a radiation unit according to an embodiment of the present invention;

[0027] Figure 5 is a schematic structural diagram of the back side of a radiation unit according to an embodiment of the present invention;

[0028] Figure 6 is a schematic diagram of the installation of the first radiation arm and the second radiation arm according to an embodiment of the present invention;

[0029] Figure 7 is the horizontal plane radiation pattern of the omnidirectional antenna according to the embodiment of the present invention;

[0030] Figure 8 is the vertical plane radiation pattern of the omnidirectional antenna according to the embodiment of the present invention;

[0031] Fig. 9 is an S parameter curve diagram of an omnidirectional antenna according to an embodiment of the present invention;

[0032] In the figure: 1-lamp holder; 2-lamp pole; 31-lamp holder; 32-anchor bolt; 33-wiring tube; 34-cement foundation; 41-dielectric substrate; 421-first radiating arm; 4211-first equilateral triangle patch; 4212-first lower rectangular patch; 4213-first side rectangular patch; 4214-first long strip hole; 422-second radiating arm; 4221-second inverted triangle patch; 4222-second upper rectangular patch; 4223-second side rectangular patch; 4224-second long strip hole; 431-cable outer conductor; 432-cable inner conductor; 441-feeding rectangular patch; 442-feeding circular patch; 443-first circular hole; 444-second circular hole. DETAILED DESCRIPTION

[0033] The present invention is further described below in conjunction with the accompanying drawings and examples. In the following detailed description, certain exemplary embodiments of the present invention are described only by way of illustration. Needless to say, those of ordinary skill in the art will recognize that the described embodiments may be modified in various ways without departing from the spirit and scope of the present invention. Therefore, the drawings and description are illustrative in nature and are not intended to limit the scope of protection of the claims.

[0034] like Figure 1 As shown, the structure of the built-in antenna type street lamp includes a lamp holder 1 and a lamp holder 31, wherein a lamp pole 2 is connected between the lamp holder 1 and the lamp holder 31, and the lamp pole 2 also serves as an antenna body, in which an omnidirectional antenna is installed; the lamp holder 31 is fixed to a cement foundation 34 by anchor bolts 32, and a wiring tube 33 for power supply and signal transmission is provided in the cement foundation 34, and cables and power lines can enter into the antenna body through the wiring tube 33. The wiring tube 33 is buried in the solid cement foundation 34, which can effectively prevent damage and corrosion, and can not only improve the service life of the device, but also improve safety and prevent leakage from causing harm to people.

[0035] See also Figures 2 to 6 The omnidirectional antenna is a microstrip omnidirectional array antenna, and the omnidirectional antenna includes a dielectric substrate 41, and a plurality of radiating units are arranged on the dielectric substrate 41, and any of the radiating units includes a first radiating arm 421 arranged on the front of the dielectric substrate 41 and a second radiating arm 422 arranged on the back of the dielectric substrate 41, and the first radiating arm 421 and the second radiating arm 422 are arranged symmetrically up and down, and a feeding device for connecting a cable device is arranged between the two. In this embodiment, the number of the radiating units is 5, which are evenly spaced on the dielectric substrate 41, and the spacing is 170 mm.

[0036] See also Figures 2 to 6The first radiation arm 421 includes a first equilateral triangle patch 4211, and a first lower rectangular patch 4212 perpendicular to the bottom edge of the first equilateral triangle patch 4211 is connected below the first equilateral triangle patch 4211, and first side rectangular patches 4213 perpendicular to the bottom edge of the first equilateral triangle patch 4211 are symmetrically connected on both sides of the first equilateral triangle patch 4211.

[0037] See also Figures 2 to 6 The second radiation arm 422 includes a second inverted triangle patch 4221, and a second upper rectangular patch 4222 perpendicular to the bottom edge of the second inverted triangle patch 4221 is connected below the second inverted triangle patch 4221, and second side rectangular patches 4223 perpendicular to the bottom edge of the second inverted triangle patch 4221 are symmetrically connected on both sides of the second inverted triangle patch 4221.

[0038] See also Figures 2 to 6 The feeding device includes a feeding rectangular patch 441 connected to the top of the first equilateral triangle patch 4211, and the top of the feeding rectangular patch 441 is also connected to a feeding circular patch 442, and a first circular hole 443 connected to the cable device is arranged in the feeding circular patch 442, and a second circular hole 444 connected to the cable device is arranged at the lower part of the second inverted triangle patch 4221.

[0039] See also Figures 2 to 6 The cable device includes a coaxially arranged cable outer conductor 431 and a cable inner conductor 432, the cable outer conductor 431 passes through the second circular hole 444 to be connected to the second radiation arm 422, and the cable inner conductor 432 extends out of the cable outer conductor 431 and passes through the dielectric substrate 41 and the first circular hole 443 in sequence to be connected to the first radiation arm 421.

[0040] See also Figures 2 to 6 The first equilateral triangle patch 4211 is further provided with a first long strip hole 4214; the second inverted triangle patch 4221 is further provided with a second long strip hole 4224, and the sizes of the first long strip hole 4214 and the second long strip hole 4224 are both 35mm×2.5mm.

[0041] The dielectric substrate 41 is configured as a FR4 substrate. The dielectric substrate 41 is made of FR4 and has a thickness of 1 mm.

[0042] The lamp head 1 is an LED lamp, which is used as a light source. A light sensor and a sound sensor are provided in the lamp head 1. A street lamp controller connected to the light sensor and the sound sensor is also provided in the lamp head 1. The street lamp controller is used to control the lamp head 1 to achieve automatic control. When the light is good during the day, the light source stops working; when there is no human activity at night, the light is automatically dimmed; when there are dense human activities, the light is automatically brightened.

[0043] The antenna body is provided with a glass fiber reinforced plastic cover, which has good wave transmission and high strength, and its diameter is 76mm.

[0044] Figures 7 to 9 , which is a data diagram of the present invention, including a horizontal plane direction diagram, a vertical plane direction diagram and an S parameter curve diagram. Figure 7 is the horizontal plane directional diagram of the five units in the case of the present invention, Figure 8 is the vertical plane direction diagram, Figure 7 and Figure 8 It can be seen that the antenna array has good omnidirectionality in the horizontal plane, low side lobes in the vertical plane, and a gain of 7.17dbi; Fig. 9 is the S parameter data diagram, Fig. 9 It can be seen that the full antenna can effectively cover the 806-960MHz frequency band, and the standing wave is below 1.5.

[0045] In summary, compared with the prior art, the advantages of the present invention are as follows:

[0046] (1) The present invention can achieve signal coverage in the 806-960MHz frequency band while meeting normal lighting requirements. By forming an array of radiation units, the antenna gain can be greatly improved, the standing wave ratio can be reduced, the antenna debugging time can be reduced, and the production efficiency can be improved.

[0047] (2) The antenna's radiating unit adopts a microstrip patch structure, which has the advantages of low profile, small size, light weight and low cost. When formed into an array antenna, it can achieve 360° omnidirectional coverage on the horizontal plane;

[0048] (3) It also has the advantages of good concealment, small size, light weight, low cost, simple production, and easy mass production. It can also greatly reduce the panic of community residents about the electromagnetic environment.

[0049] (4) Breaking through the limitation of single-band system radiation of traditional omnidirectional antennas, solving the problems of difficult processing, difficult debugging, high cost and poor performance of traditional omnidirectional antennas, and realizing multi-band and wide-band omnidirectional radiation;

[0050] (5) The wide frequency band coverage of the antenna can make up for the shortcomings of the narrow frequency band of the same type of antenna, meet the needs of telecommunications equipment manufacturers for coverage of multiple communication frequency bands, and also meet the low cost and high performance requirements of equipment operators.

[0051] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A street lamp structure with a built-in antenna, comprising a lamp cap and a lamp holder, wherein a lamp pole is connected between the lamp cap and the lamp holder, characterized in that: The lamp pole also serves as an antenna body, and an omnidirectional antenna is installed in the antenna body; the lamp holder is fixed to the cement foundation by anchor bolts, and a wiring tube for power supply and signal transmission is arranged in the cement foundation; The omnidirectional antenna comprises a dielectric substrate, on which a plurality of groups of radiating units are arranged, any of the radiating units comprises a first radiating arm arranged on the front side of the dielectric substrate and a second radiating arm arranged on the back side of the dielectric substrate, the first radiating arm and the second radiating arm are arranged symmetrically up and down, and a feeding device for connecting a cable device is arranged between the first radiating arm and the second radiating arm; The first radiating arm comprises a first equilateral triangle patch, a first lower rectangular patch perpendicular to the bottom side of the first equilateral triangle patch is connected below the first equilateral triangle patch, and first side rectangular patches perpendicular to the bottom side of the first equilateral triangle patch are symmetrically connected on both sides of the first equilateral triangle patch; The second radiating arm comprises a second inverted triangle patch, a second upper rectangular patch perpendicular to the bottom edge of the second inverted triangle patch is connected below the second inverted triangle patch, and second side rectangular patches perpendicular to the bottom edge of the second inverted triangle patch are symmetrically connected on both sides of the second inverted triangle patch; A first long strip hole is also provided in the first regular triangle patch; and a second long strip hole is also provided in the second inverted triangle patch.

2. The internal antenna type street lamp structure as claimed in claim 1, characterized in that: The feeding device includes a feeding rectangular patch connected to the top of the first equilateral triangle patch, the top of the feeding rectangular patch is also connected to a feeding circular patch, a first circular hole connected to the cable device is arranged in the feeding circular patch, and a second circular hole connected to the cable device is arranged at the lower part of the second inverted triangle patch.

3. The internal antenna type street lamp structure as claimed in claim 2, characterized in that: The cable device comprises a coaxially arranged cable outer conductor and a cable inner conductor, wherein the cable outer conductor passes through the second circular hole to be connected to the second radiation arm, and the cable inner conductor extends out of the cable outer conductor and passes through the dielectric substrate and the first circular hole in sequence to be connected to the first radiation arm.

4. The internal antenna type street lamp structure according to claim 1, characterized in that: The dielectric substrate is configured as a FR4 substrate.

5. The internal antenna type street lamp structure according to claim 1, characterized in that: The lamp holder is an LED lamp, a light sensor and a sound sensor are arranged inside the lamp holder, and a street lamp controller connected to the light sensor and the sound sensor is also arranged inside the lamp holder.

6. The internal antenna type street lamp structure according to any one of claims 1 to 5, characterized in that: A glass fiber reinforced plastic outer cover is arranged outside the antenna body.

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