CN215579040U - Vertical base station antenna with high front-to-back ratio and communication equipment - Google Patents
Vertical base station antenna with high front-to-back ratio and communication equipment Download PDFInfo
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- CN215579040U CN215579040U CN202121347790.2U CN202121347790U CN215579040U CN 215579040 U CN215579040 U CN 215579040U CN 202121347790 U CN202121347790 U CN 202121347790U CN 215579040 U CN215579040 U CN 215579040U
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- 238000004891 communication Methods 0.000 title claims abstract description 10
- 230000005855 radiation Effects 0.000 claims abstract description 35
- 239000002184 metal Substances 0.000 claims abstract description 33
- 239000000758 substrate Substances 0.000 claims description 36
- 238000005388 cross polarization Methods 0.000 abstract description 2
- 238000010295 mobile communication Methods 0.000 description 6
- 230000010287 polarization Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 210000001624 hip Anatomy 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
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Abstract
The utility model discloses a vertical base station antenna with high front-to-back ratio and communication equipment, which comprise a reflecting plate, a metal ring, a metal surrounding edge and an antenna radiation unit, wherein the antenna radiation unit is arranged on the reflecting plate, the metal ring is arranged above the reflecting plate and is embedded around the antenna radiation unit, the metal surrounding edge is arranged around the reflecting plate, and the metal surrounding edge is provided with a groove. The antenna has the advantages of upright structure, small size, high front-back ratio and small cross polarization.
Description
Technical Field
The utility model relates to the field of mobile communication, in particular to an upright base station antenna with high front-to-back ratio and communication equipment.
Background
With the development of mobile communication technology, users have increasingly demanded communication, and it is very important to improve the capacity of a mobile communication system. The cellular mobile communication system can realize frequency reuse, and the capacity of the system is greatly improved. The same frequency is used for transmitting different data, so that the frequency utilization rate is improved, interference is inevitably generated among different base stations using the same frequency, the interference can cause disorder of a switching relation, and a call drop can be generated in a serious case.
In order to improve the quality of mobile communication, in practical application, co-channel interference needs to be reduced as much as possible, and for cells using the same frequency, the radiation intensity of the cell is ensured, and the radiation to the co-frequency cells is reduced as much as possible. This requires that the base station antenna has good directivity, only by increasing the front-to-back ratio of the antenna it is ensured that the antenna radiates as high a level as possible only to the cell which the base station needs to cover, and as low a level as possible to other base stations using the same frequency. The front-back ratio of the antenna is improved by increasing the reflecting plate, but the size of the antenna is increased while the reflecting plate is increased, and the increase of the size of the antenna not only occupies space, but also improves cost. In practical engineering application, it is very important to control the size of the antenna and improve the front-to-back ratio of the antenna.
At present, the area of a reflector of a base station antenna used in a communication system is generally large and does not meet the use requirements of a mobile communication system, which is limited to the technical level. If a radiation base station antenna can have a higher front-to-back ratio while controlling the size, the space utilization rate is greatly improved.
SUMMERY OF THE UTILITY MODEL
To overcome the disadvantages and shortcomings of the prior art, the present invention provides a vertical base station antenna with a high front-to-back ratio and a communication device.
The utility model adopts the following technical scheme:
the vertical base station antenna with the high front-to-back ratio comprises a reflecting plate, a metal ring, a metal surrounding edge and an antenna radiation unit, wherein the antenna radiation unit is arranged on the reflecting plate, the metal ring is arranged above the reflecting plate and is embedded around the antenna radiation unit, the metal surrounding edge is arranged around the reflecting plate, and the metal surrounding edge is grooved.
Further, the metal ring is an octagon, the octagon comprises four first edges and four second edges, and the first edges and the second edges are alternately arranged.
Furthermore, the first side and the second side are both in a trapezoidal structure, the length of the second side is greater than that of the first side, and the width of the first side is greater than that of the second side.
The antenna radiation unit comprises an antenna medium substrate, a feed structure and a radiation oscillator, wherein the antenna medium substrate comprises a first medium substrate and a second medium substrate, the radiation oscillator comprises a first radiation oscillator and a second radiation oscillator, the feed structure comprises a first feeder line and a second feeder line, the first medium substrate and the second medium substrate are mutually nested and fixed at the central position of the reflecting plate in a cross manner, the first radiation oscillator and the second radiation oscillator are respectively printed on the front surfaces of the first medium substrate and the second medium substrate, the first feeder line and the second feeder line are respectively printed on the back surfaces of the first medium substrate and the second medium substrate, the first radiation oscillator forms a + 45-degree polarization oscillator, the first feeder line feeds power, the second radiation oscillator forms a-45-degree polarization oscillator, and the second feeder line feeds power.
Further, the first radiation oscillator and the second radiation oscillator are identical in structure and are composed of two oscillator arms inclining downwards.
Further, the downward inclination angle of the vibrator arm is 20 degrees.
Furthermore, the upper half part of each oscillator arm is provided with a rectangular gap to divide the oscillator arm into two parts.
Further, the metal surrounding edge is formed by four rectangular plates.
Furthermore, each rectangular plate is provided with two groups of grooves, one group of grooves are two grooves which are symmetrical about the central line of the rectangular plate and have the same shape, the other group of grooves are two grooves which are arranged on two sides of the central line of the rectangular plate and have different shapes, and the other group of grooves are arranged between the two groups of grooves.
A communication device comprises the vertical base station antenna.
The utility model has the beneficial effects that:
(1) the front-to-back ratio of the antenna reaches 25dB, the coverage is 690-960MHz, and the antenna is suitable for LTE700, CDMA800 and GSM900 frequency bands.
(2) The metal surrounding edge is arranged on the reflecting plate of the antenna, so that the existence of surface waves on the floor can be inhibited, the diffraction of the surface waves on the edge of the floor is reduced, and the front-to-back ratio of the antenna is improved.
(3) And the metal surrounding edge is provided with an irregular groove, so that the current path is prolonged, and the front-to-back ratio is effectively improved.
(4) The antenna is provided with the metal ring and the rectangular gap, and the antenna gain is effectively improved.
(5) The radiator of the utility model has novel structure and convenient manufacture.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a front view of the present invention;
FIG. 3 is a schematic view of a radiating element of the present invention;
FIG. 4 is a schematic view of a metal ring structure of the present invention;
figure 5 is the front-to-back ratio of the high front-to-back ratio upright base station antenna of the present invention.
Figure 6 is an impedance bandwidth of a high front-to-back ratio vertical base station antenna of the present invention.
Detailed Description
The present invention will be described in further detail with reference to examples and drawings, but the present invention is not limited to these examples.
Example 1
As shown in fig. 1-6, an upright base station antenna with a high front-to-back ratio includes a reflector 2, a metal ring 4, a metal surrounding edge 3 and an antenna radiation unit 1, where the metal ring 4 is printed on a dielectric substrate 6, the dielectric substrate is fixed above the reflector 2 by a support pillar 5, which is 75mm apart in this embodiment, and the support pillars are all insulating plastic pillars.
The antenna radiation unit comprises a first radiation oscillator 7A, a second radiation oscillator 7B, an antenna dielectric substrate and a feed structure, wherein the feed structure comprises a first feed line 8A and a second feed line 8B, the antenna dielectric substrate comprises a first dielectric substrate 9A and a second dielectric substrate 9B, the first radiation oscillator and the second radiation oscillator are respectively printed on the front surfaces of the first dielectric substrate and the second dielectric substrate, the first feed line and the second feed line are respectively printed on the back surfaces of the first dielectric substrate and the second dielectric substrate, the first radiation oscillator forms a + 45-degree polarization oscillator, the first feed line feeds power, the second radiation oscillator forms a-45-degree polarization oscillator, and the second feed line feeds power.
The first feeder line and the second feeder line are identical in structure and size and are perpendicular to each other.
The distance between the reflecting plate and the top end of the antenna radiation unit is 0.2 lambdaL-0.3λLWherein λ isLThe central frequency of the broadband base station antenna is 0.83GHz corresponding to the wavelength in free space.
The first dielectric substrate and the second dielectric substrate are mutually nested and fixed in the positive center of the reflecting plate in a cross manner.
As shown in fig. 1, the upper edge of each radiating element is similar to two waists of a triangle, and the downward inclination angle is 20 degrees, the inclination angle has an influence on the s parameter and the front-to-back ratio of the antenna, and the simulated inclination angle in the embodiment is optimal.
Furthermore, the first radiating oscillator and the second radiating oscillator are formed by two oscillator arms, each oscillator arm is provided with a rectangular gap, and the rectangular gaps improve the gain of the antenna. The rectangular slot is located approximately three-quarters of the height of the antenna and the rectangular width is approximately 5 mm. The rectangular slot divides the antenna into half parts, so that the radiation of the antenna is guided, and the gain of the antenna is improved.
The metal ring is octagonal, the height of the metal ring is equivalent to that of the rectangular slot, and the position of the metal ring is about three-quarters of the height of the antenna. The gain of the antenna is reduced to some extent, the antenna is guided to radiate to the front by the effect of the metal ring, the gain of the antenna is improved, the effect similar to a director is achieved, and meanwhile the front-to-back ratio of the low frequency band of the antenna is improved.
Further, the octagon is formed by alternately arranging two sizes of edges, namely a first edge and a second edge, wherein the first edge is a thick edge, and the second edge is a thin edge. Because of the ring structure, the first side and the second side are both trapezoid-like, the upper bottom of the first side is 66.5mm, the lower bottom is 77.8mm, and the height of the first side is larger than that of the second side. The upper bottom of the second side is 70mm, and the lower bottom is 96 mm.
In order to further realize the effect of high front-to-back ratio, the antenna is provided with the slot on the metal surrounding edge, the metal surrounding edge is formed by vertically arranging four rectangular plates on the reflecting plate, and the shape of the metal surrounding edge is the same as that of the reflecting plate and is square. The slotting of every rectangular plate is the same, including two groups of grooves, every group includes two grooves, and two grooves of first group set up about the central line symmetry of rectangular plate, and the shape is the same, are rectangular shape, and two grooves of second group set up in the both sides of rectangular plate central line, and the shape is different. The second set of two slots is located between the first set of two slots. The slot has the function of prolonging the path of the current on the surrounding edge, the length of the physical path of one surrounding edge after the slot is about 420mm, and the path of the induced current on the antenna is between one wavelength (313mm-435mm) of the working frequency band of the antenna when the antenna works, so that the field generated by the induced current is offset with the field which is generated by the original antenna and radiated backwards, the radiation of the antenna backwards is reduced, and the front-to-back ratio is improved. However, since the slots also have an influence on the impedance matching of the antenna, it is very critical how to arrange the number, size and position of the slots.
In this embodiment, the length of the rectangular plate is 195mm, the width of the rectangular plate is 50mm, the first group of grooves are long-strip-shaped, the length of the first group of grooves is 40mm, the length of the second group of grooves is 40mm, and every two grooves are independent and are not connected.
The dielectric substrate 6 is made of a high-frequency plate R04350B, the thickness of the dielectric substrate is 0.76mm, the relative dielectric constant of the dielectric substrate is 3.45, and an octagonal hollow hole is formed in the middle of the dielectric substrate and is used for being nested around the radiation unit.
The reflecting plate is square, and the side length is 198 mm.
As shown in fig. 5 and fig. 6, the antenna of this embodiment 1 has an impedance bandwidth of 690-960MHz, a return loss of 15dB, and can completely cover LTE700, CDMA800 and GSM900 frequency bands, and the isolation of the bandwidth reaches more than 30dB, and the front-to-back ratio reaches 25 dB.
The vertical base station antenna has the characteristics of novel structure, vertical structure, simple manufacture, small antenna size, high front-back ratio, small cross polarization and the like.
Example 2
A communication device comprising an antenna as described in embodiment 1.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.
Claims (10)
1. The vertical base station antenna with the high front-to-back ratio is characterized by comprising a reflecting plate, a metal ring, a metal surrounding edge and an antenna radiation unit, wherein the antenna radiation unit is arranged on the reflecting plate, the metal ring is arranged above the reflecting plate and is embedded around the antenna radiation unit, the metal surrounding edge is arranged around the reflecting plate, the metal surrounding edge is grooved, and the metal ring is octagonal.
2. The vertical base station antenna of claim 1, wherein the octagon comprises four first sides and four second sides, the first sides and the second sides being arranged alternately.
3. A vertical base station antenna according to claim 2, wherein the length of the second side is greater than the length of the first side, and the width of the first side is greater than the width of the second side.
4. The vertical base station antenna of claim 1, wherein the antenna radiating element comprises an antenna dielectric substrate, a feeding structure and a radiating element, the antenna dielectric substrate comprises a first dielectric substrate and a second dielectric substrate, the radiating element comprises a first radiating element and a second radiating element, the feeding structure comprises a first feeder line and a second feeder line, the first dielectric substrate and the second dielectric substrate are nested with each other and fixed at the central position of the reflector plate in a crisscross manner, the first radiating element and the second radiating element are respectively printed on the front surfaces of the first dielectric substrate and the second dielectric substrate, the first feeder line and the second feeder line are respectively printed on the back surfaces of the first dielectric substrate and the second dielectric substrate, the first radiating element forms a + 45-degree polarized element, the first feeder line is used for feeding, and the second radiating element forms a-45-degree polarized element, fed by a second feed line.
5. The vertical base station antenna according to claim 4, wherein the first and second radiating elements are identical in structure and each comprise two downwardly inclined element arms.
6. The vertical base station antenna of claim 5, wherein the downward angle of inclination of the dipole arms is 20 degrees.
7. The antenna of claim 6, wherein the upper half of each dipole arm has a rectangular slot therein dividing the dipole arm into two portions.
8. An upright base station antenna according to any of claims 1-7, wherein said metal surround is formed by four rectangular plates.
9. An upright base station antenna according to claim 8, characterized in that two sets of slots are provided per rectangular plate, one set of slots being two slots of the same shape and symmetrical about the centre line of the rectangular plate, the other set of slots being two slots of different shape and provided on either side of the centre line of the rectangular plate, the other set of slots being provided between the two slots of a set.
10. A communication device comprising a vertical base station antenna according to any of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121347790.2U CN215579040U (en) | 2021-06-17 | 2021-06-17 | Vertical base station antenna with high front-to-back ratio and communication equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121347790.2U CN215579040U (en) | 2021-06-17 | 2021-06-17 | Vertical base station antenna with high front-to-back ratio and communication equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215579040U true CN215579040U (en) | 2022-01-18 |
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ID=79817944
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121347790.2U Expired - Fee Related CN215579040U (en) | 2021-06-17 | 2021-06-17 | Vertical base station antenna with high front-to-back ratio and communication equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215579040U (en) |
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2021
- 2021-06-17 CN CN202121347790.2U patent/CN215579040U/en not_active Expired - Fee Related
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20220118 |