CN217086868U - Low-frequency radiation unit for multi-frequency antenna - Google Patents
Low-frequency radiation unit for multi-frequency antenna Download PDFInfo
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- CN217086868U CN217086868U CN202220893154.8U CN202220893154U CN217086868U CN 217086868 U CN217086868 U CN 217086868U CN 202220893154 U CN202220893154 U CN 202220893154U CN 217086868 U CN217086868 U CN 217086868U
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Abstract
The utility model relates to a low-frequency radiation unit for a multi-frequency antenna, which comprises a radiation body, a feed balun and a feed base; the radiator comprises two pairs of dipoles which are distributed orthogonally and the radiating surfaces are positioned on the same plane; each pair of dipoles comprises two radiating arms; irregular lines with different line thicknesses are arranged in each radiation arm; a T-shaped resonator for tuning is arranged at the top end of each radiation arm; the feed balun is in an orthogonal structure, and the upper end of the feed balun is connected with a radiator; the lower end of the feed balun is connected with a feed base; the utility model discloses an adopt the irregular circuit that the lines thickness differs, can change the reactance in each position, reach the extension bandwidth and promote the effect of wave-transparent performance, can make to demonstrate the impedance that is favorable to the performance at different frequency points for improve current distribution and promote bandwidth and radiation performance.
Description
Technical Field
The utility model relates to an antenna field refers in particular to a low frequency radiation unit for multifrequency antenna.
Background
With the development of wireless communication, 5G construction reaches the middle stage, a gold frequency band 700MHz project is started, a base station antenna develops towards ultra-wideband, multi-band, multi-array and miniaturization, and from the requirements of cost, weight, wind load, surface installation and the like, different frequency band arrays need to be nested and fused with each other to form a combined array, so that the surface size is effectively reduced, the weight of the antenna is reduced, but the nested and fused combined array can cause mutual interference among different arrays and different frequency bands, and the performance of the antenna is seriously influenced.
For example, the low-frequency radiating element and the base station antenna disclosed in 202021499513.9 in the prior art and the low-frequency radiating element and the base station antenna disclosed in 202010693384.5 in the prior art both use a high-resistance meander line filtering method, which results in divergent impedance of the radiating element and limited matching bandwidth; further, like the low-frequency radiating unit and the base station antenna disclosed in 202022312237.7 in the prior art, and the low-frequency radiating unit and the antenna array disclosed in 202111287647.3 in the prior art, both the radiating arm and the open-circuit filter directly adopt equal-width lines, and the equal-width lines have the same impedance in the frequency band, and do not have the capability of expanding the matching and filtering bandwidths.
SUMMERY OF THE UTILITY MODEL
The present invention is directed to overcome the disadvantages of the prior art and to provide a low frequency radiation unit for a multi-frequency antenna.
In order to achieve the above purpose, the utility model adopts the technical scheme that: a low-frequency radiation unit for a multi-frequency antenna comprises a radiator, a feed balun and a feed base;
the radiator comprises two pairs of dipoles which are distributed orthogonally and the radiating surfaces are positioned on the same plane; each pair of dipoles comprises two radiating arms; irregular lines with different line thicknesses are arranged in each radiation arm; a T-shaped resonator for tuning is arranged at the top end of each radiation arm;
the feed balun is in an orthogonal structure, and the upper end of the feed balun is connected with a radiator; the lower end of the feed balun is connected with the feed base.
Preferably, the irregular line is an annular line with different line thicknesses.
Preferably, each radiation arm is further provided with a plurality of filter circuits of even number and annular lines; the filter circuits are symmetrically distributed along the +/-45-degree direction of the radiator, and each filter circuit is in a convex shape formed by two lines with different widths.
Preferably, a first hollow-out part is further arranged in the middle of each radiation arm.
Preferably, each radiation arm is further provided with a second hollow part between adjacent filter circuits.
Preferably, the radiator is formed by combining and welding PCBs.
Preferably, the feeding balun comprises a pair of transmission PCB boards which are orthogonal to each other and symmetrically arranged along the +/-45 ° direction of the radiator.
Preferably, the feed base is a feed PCB, and is provided with a slot for mounting a pair of transmission PCBs, and the top is provided with two feed lines connected to the two transmission PCBs on the feed balun, and the bottom is provided with two welding points connected to the two feed lines.
Because of above-mentioned technical scheme's application, compared with the prior art, the utility model have the following advantage:
1. the utility model discloses an adopt the irregular circuit that the line thickness is different, can change the reactance on each position, reach the extension bandwidth and promote the effect of wave-transparent performance, can make to present the impedance that is favorable to the performance at different frequency points for improve current distribution and promote bandwidth and radiation performance;
2. the utility model discloses a set up the filter circuit of a plurality of even numbers and annular line on the radiation arm, make filter circuit constitute the convex word shape by two sections different lines of width, be favorable to promoting the ability of filtering high frequency electromagnetic wave, thereby reduce the influence of high frequency radiation unit to low frequency radiation unit performance when nested, be used for suppressing high frequency induced current, eliminate with the high frequency between the open circuit minor matters of cross coupling, wherein a plurality of even numbers filter circuit along irradiator 45 degrees direction symmetric distribution, can make high frequency radiation unit produce the harmless low frequency radiation unit that pierces through of electromagnetic wave, realize the stealthy of low frequency radiation unit to high frequency radiation unit;
3. the utility model discloses the bandwidth is wide, require for a short time, light in weight to the antenna headroom, be fit for with high-band radiating element nested, can be applied to the high-low frequency multiport antenna of present trade mainstream, can realize expanding the bandwidth, promoting the electrical property, reduce weight, reduce the purpose of volume to this type of antenna.
Drawings
The technical scheme of the utility model is further explained by combining the attached drawings as follows:
fig. 1 is a schematic structural diagram of a low-frequency radiation unit for a multi-frequency antenna according to the present invention;
fig. 2 is a schematic structural diagram of the radiator of the present invention;
fig. 3 is a top view of the feeding base of the present invention;
fig. 4 is a bottom view of the feeding base of the present invention.
Wherein: 1. a radiator; 11. a radiation arm; 12. irregular lines; 13. a T-type resonator; 14. a filter circuit; 15. a first hollow-out section; 6. a second hollowed-out portion; 2. a feed balun; 3. a feed base; 31. a card slot; 32. a feed line; 33. and (7) welding points.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Fig. 1-4 show a low frequency radiation unit for a multi-frequency antenna according to the present invention, which includes a radiation body 1, a feed balun 2 and a feed base 3;
the radiator 1 comprises two pairs of dipoles which are orthogonally distributed and the radiating surfaces of the dipoles are positioned on the same plane, and the dipoles are respectively distributed in the +/-45-degree direction of the radiator 1 to form +/-45-degree two polarizations to form a dual-polarized radiating unit; each pair of said dipoles comprises two radiating arms 11; irregular lines 12 with different line thicknesses are arranged in each radiation arm 11; a T-shaped resonator 13 for tuning is arranged at the top end of each radiation arm 11, so that the bandwidth can be expanded and the resonant frequency can be adjusted;
the feed balun 2 is in an orthogonal structure, and the upper end of the feed balun 2 is connected with the radiator 1, namely the upper end of the feed balun 2 is in feed connection with the radiator 1; the lower end of the feed balun 2 is connected with the feed base 3, namely the lower end of the feed balun 2 is in feed connection with the feed network.
Further, the irregular lines 12 are ring lines with different line thicknesses, and the reactance at each position can be changed through the ring lines with different line thicknesses, so that the functions of expanding the bandwidth and improving the wave-transmitting performance are achieved, and the functions of improving the current distribution and improving the bandwidth and the radiation performance are achieved.
Furthermore, each radiation arm 11 is also provided with a plurality of filter circuits 14 of even number and ring line; the filter circuits 14 are symmetrically distributed along the direction of the radiator 1 +/-45 degrees, each filter circuit 14 is in a convex shape formed by two lines with different widths, the capacity of filtering high-frequency electromagnetic waves is improved, the influence of a high-frequency radiation unit on the performance of a low-frequency radiation unit during nesting is reduced, the filter circuits are used for inhibiting high-frequency induced current and eliminating open-circuit branches mutually coupled with high frequency, the filter circuits 14 are symmetrically distributed along the direction of the radiator 1 +/-45 degrees, the high-frequency radiation unit can generate electromagnetic waves which can penetrate through the low-frequency radiation unit without damage, and the low-frequency radiation unit can be hidden from the high-frequency radiation unit.
Further, every radiation arm 11's middle part still is provided with first fretwork portion 15, reducible weight, the lightweight of being convenient for.
Further, each of the radiating arms 11 is further provided with a second hollow portion 16 between adjacent filter circuits 14, so that the weight can be further reduced, and the structure is lighter.
Furthermore, the radiator 1 is formed by combining and welding PCBs, and is simple in process, good in consistency and light in weight.
Further, the feed balun 2 includes a pair of transmission PCB boards orthogonal to each other and symmetrically disposed along the radiator 1 ± 45 ° direction, so that the feed base 3 feeds the radiator 1, thereby effectively reducing the mutual coupling (different points) between polarizations and improving the isolation.
Further, the feeding base 3 is a feeding PCB and is provided with a slot 31 for mounting a pair of transmission PCBs, the top of the feeding base is provided with two feeding lines 32 connected with the two transmission PCBs on the feeding balun 2, the bottom of the feeding base is provided with two welding points 33 connected with the two feeding lines 32, and the two feeding lines 32 and the two welding points 33 are respectively located at the top and the bottom of the feeding PCB, so that the welding points 33 are located on the same side as the antenna feeding network, and the whole assembly is facilitated.
The above is only a specific application example of the present invention, and does not constitute any limitation to the protection scope of the present invention. All the technical solutions formed by equivalent transformation or equivalent replacement fall within the protection scope of the present invention.
Claims (8)
1. A low frequency radiating element for a multi-frequency antenna, comprising: the antenna comprises a radiator, a feed balun and a feed base;
the radiator comprises two pairs of dipoles which are distributed orthogonally and the radiating surfaces are positioned on the same plane; each pair of dipoles comprises two radiating arms; irregular lines with different line thicknesses are arranged in each radiation arm; a T-shaped resonator for tuning is arranged at the top end of each radiation arm;
the feed balun is in an orthogonal structure, and the upper end of the feed balun is connected with a radiator; the lower end of the feed balun is connected with the feed base.
2. The low frequency radiating element for a multi-frequency antenna of claim 1, wherein: the irregular lines are annular lines with different line thicknesses.
3. The low frequency radiating element for a multi-frequency antenna of claim 2, wherein: each radiation arm is also provided with a plurality of filter circuits of even number and annular lines; the filter circuits are symmetrically distributed along the +/-45-degree direction of the radiator, and each filter circuit is in a convex shape formed by two lines with different widths.
4. A low frequency radiating element for a multifrequency antenna according to claim 3, further comprising: the middle part of each radiation arm is also provided with a first hollow part.
5. The low frequency radiating element for a multi-frequency antenna of claim 4, wherein: and a second hollow part is also arranged between the adjacent filter circuits on each radiation arm.
6. The low frequency radiating element for a multi-frequency antenna of claim 5, wherein: the radiator is formed by combining and welding PCBs.
7. A low frequency radiating element for a multi-frequency antenna according to any one of claims 1 to 6, wherein: the feed balun comprises a pair of transmission PCB boards which are mutually orthogonal and symmetrically arranged along the +/-45-degree direction of the radiator.
8. The low frequency radiating element for a multi-frequency antenna of claim 7, wherein: the feed base is a feed PCB and is provided with a clamping groove for mounting a pair of transmission PCBs, two feed lines connected with the two transmission PCBs on the feed balun are respectively arranged at the top of the feed base, and two welding spots connected with the two feed lines are respectively arranged at the bottom of the feed base.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220893154.8U CN217086868U (en) | 2022-04-18 | 2022-04-18 | Low-frequency radiation unit for multi-frequency antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220893154.8U CN217086868U (en) | 2022-04-18 | 2022-04-18 | Low-frequency radiation unit for multi-frequency antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217086868U true CN217086868U (en) | 2022-07-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220893154.8U Active CN217086868U (en) | 2022-04-18 | 2022-04-18 | Low-frequency radiation unit for multi-frequency antenna |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217086868U (en) |
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2022
- 2022-04-18 CN CN202220893154.8U patent/CN217086868U/en active Active
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