CN210926312U - Broadband radiation unit and antenna - Google Patents
Broadband radiation unit and antenna Download PDFInfo
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- CN210926312U CN210926312U CN201922454334.7U CN201922454334U CN210926312U CN 210926312 U CN210926312 U CN 210926312U CN 201922454334 U CN201922454334 U CN 201922454334U CN 210926312 U CN210926312 U CN 210926312U
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- 230000008878 coupling Effects 0.000 claims abstract description 12
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- 239000000758 substrate Substances 0.000 claims description 33
- 238000003491 array Methods 0.000 claims description 6
- 238000010586 diagram Methods 0.000 abstract description 16
- 238000002955 isolation Methods 0.000 abstract description 7
- 230000010287 polarization Effects 0.000 abstract description 4
- 238000006880 cross-coupling reaction Methods 0.000 abstract description 3
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Abstract
The utility model provides a wide band radiating element and antenna, wide band radiating element includes two pairs of orthogonal radiators of polarization, every the radiator includes the radiating arm that two mutually perpendicular connect and connects between two radiating arms and form the unit of decoupling of closed loop jointly, the unit of decoupling is used for reducing the cross-coupling with high frequency radiating element, two adjacent radiating arm parallel arrangement of two adjacent radiators. The broadband radiation unit effectively reduces mutual coupling with the high-frequency radiation unit, improves the isolation degree and directional diagram performance of the antenna, enables the equivalent aperture of the broadband radiation unit to be larger, enables the beam width to be narrower, enables the level of the edge of a sector to be reduced more quickly, and greatly improves the unit gain of the broadband radiation unit.
Description
Technical Field
The utility model relates to a wireless communication field especially relates to a wide band radiating element and antenna.
Background
With the rapid development of modern wireless communication technology, the problems of rapid increase of the number of base stations, difficult site selection, inconvenient installation and the like are increasingly shown. As one of the most important components of the base station system, the miniaturization, broadband, and multi-band sharing are the main development directions.
In order to realize the miniaturization of the multi-frequency antenna, the space inside the antenna is very compact, the antenna units in different frequency bands have mutual coupling problems, and the stronger mutual coupling causes the deterioration of the antenna isolation and the distortion of a directional diagram, thereby influencing the coverage effect of a base station. Therefore, how to improve the mutual coupling between the antennas in a limited space and improve the isolation and directional diagram performance of the antennas is a problem that needs to be solved urgently at present.
In order to improve the influence of a low-frequency antenna on a high-frequency antenna in the prior art, a low-frequency oscillator is generally designed into a cross-shaped structure, and a low-frequency array is placed in a pin type manner in the high-frequency array, so that the shielding of the high-frequency oscillator can be reduced. However, the beam width of the directional diagram of the element of the cross-shaped structure is generally wide, the gain is low, and meanwhile, in order to realize broadband impedance matching of the plus or minus 45-degree polarization of the cross-shaped structure, the size of the radiating arm is often large, so that the influence on the high-frequency antenna is increased.
SUMMERY OF THE UTILITY MODEL
The primary objective of the present invention is to provide a broadband radiating unit with high gain and capable of improving the antenna isolation and the directional diagram performance.
Another object of the present invention is to provide an antenna using the above broadband radiating element.
In order to achieve the above object, the present invention provides the following technical solutions:
a broadband radiating element comprises two pairs of orthogonally polarized radiators, each radiator comprises two radiating arms which are vertically connected with each other and a decoupling unit which is connected between the two radiating arms and jointly forms a closed loop, the decoupling unit is used for reducing mutual coupling with a high-frequency radiating element, and two adjacent radiating arms of two adjacent radiators are arranged in parallel.
Further setting: the decoupling unit comprises a dielectric substrate and a circuit layer arranged on the dielectric substrate, wherein two ends of the dielectric substrate are respectively connected with two radiation arms in the radiator, so that the circuit layer and the two radiation arms form a closed loop.
Further setting: and conductive columns penetrate through two ends of the dielectric substrate along the thickness direction of the dielectric substrate, and are in conductive connection with the radiation arms and the circuit layer.
Further setting: and an extension part for supporting the medium substrate is arranged on the radiating arm along one side far away from the radiating arm parallel to the radiating arm in an extending manner.
Further setting: the circuit layer comprises two feeding areas which are respectively arranged at two ends of the dielectric substrate correspondingly and are directly connected or coupled with the radiation arms and a conducting section connected between the two feeding areas, and the feeding areas cover the extending parts.
Further setting: the conducting section is linear or curved.
Further setting: the broadband radiation unit further comprises a feed balun and two feed pieces, the four radiators are connected to the top end of the feed balun in a centrosymmetric mode, each feed piece feeds power to a pair of diagonally arranged radiators, and the two feed pieces are distributed up and down and connected to the top of the feed balun along the direction of the symmetric center line of the two radiation arms of each radiator respectively.
The utility model also provides an antenna, including the reflecting plate, all locate low frequency array and high frequency array on the reflecting plate, low frequency array and high frequency array correspond and set up at least one low frequency radiating element and at least one high frequency radiating element, low frequency radiating element is foretell wide band radiating element, high frequency radiating element install in the wide band radiating element in two radiation arm limited regions.
Further setting: the two sides of the axis of the low-frequency array are respectively provided with the high-frequency arrays, and the distance between every two adjacent broadband radiation units is twice the distance between every two high-frequency radiation units in one high-frequency array.
Further setting: two rows are respectively arranged on two sides of the axis of the low-frequency array of the high-frequency array.
Compared with the prior art, the utility model discloses a scheme has following advantage:
1. the utility model relates to an among the wide band radiating element, through setting up the radiator of two pairs of polarization orthonormalities, two radiation arm mutually perpendicular in the same radiator, two adjacent radiation arms of adjacent radiator are parallel to each other, thereby form the radiating surface structure of "ten" style of calligraphy jointly, reduce sheltering from of wide band radiating element to high frequency radiating element, and simultaneously, the unit of decoupling and two radiation arm formation closed circuit, can reduce the cross coupling with high frequency radiating element effectively, promote the isolation and the directional diagram performance of antenna, also make wide band radiating element's equivalent bore bigger, the beam width is narrower, the decline of sector edge level is faster, wide band radiating element's unit gain has been promoted greatly.
2. The utility model relates to an among the antenna, through adopting foretell wide band radiating element to form list low frequency array and biserial high frequency array or four-row high frequency array with high frequency radiating element jointly, the range between low frequency array and the high frequency array is compacter, and the cross coupling between high frequency array and the low frequency array is less, and the gain is higher, makes the multifrequency antenna miniaturization more, and directional diagram performance is better.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic structural diagram of an embodiment of a medium-frequency radiating unit according to the present invention;
fig. 2 is a top view of an embodiment of a medium-frequency radiating unit according to the present invention;
fig. 3 is a schematic structural diagram of another embodiment of the medium-frequency radiating unit of the present invention;
fig. 4 is a schematic structural diagram of another embodiment of the medium-frequency radiating unit of the present invention;
fig. 5 is a schematic structural diagram of another embodiment of a medium-frequency radiating unit according to the present invention;
fig. 6 is a gain diagram of an embodiment of the medium-frequency radiating element of the present invention;
fig. 7 is a schematic structural diagram of an embodiment of an antenna according to the present invention;
fig. 8 is a schematic structural diagram of another embodiment of the antenna of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present invention, and should not be construed as limiting the present invention.
As shown in fig. 1 and fig. 2, the present invention provides a broadband radiating element 1, which includes a feeding balun 11, two pairs of orthogonally polarized radiators 12, and two feeding plates 13, wherein each feeding plate 13 feeds two radiators 12 arranged diagonally.
In the present embodiment, the radiator 12 includes two mutually perpendicular radiation arms 121, and the length dimension of the radiation arms 121 is 0.18 to 0.3 times of the free space wavelength of the center frequency, and preferably, the length dimension of the radiation arms 121 is 0.2 times of the free space wavelength of the center frequency. The ends of the two radiation arms 121 close to each other are connected to the top of the feeding balun 11, two adjacent radiation arms 121 of two adjacent radiators 12 are arranged in parallel, and a gap is formed between the two parallel radiation arms 121. The radiator 12 further comprises a decoupling unit 122 connected to the two radiating arms 121, the decoupling unit 122 forming a closed loop together with the two radiating arms 121, the decoupling unit 122 being configured to reduce mutual coupling with the high-frequency radiating unit 3.
Through setting up two pairs of orthogonal radiators 12 of polarization, two radiation arms 121 in every radiator 12 are 90 contained angles or nearly 90 contained angles to two adjacent radiation arms 121 parallel arrangement that are close to each other of two radiators 12 constitute the radiating surface structure of "ten" style of calligraphy jointly, reduce the sheltering from of wide band radiating element 1 to high frequency radiation oscillator 3, promote antenna isolation and directional diagram performance. The decoupling unit 122 is connected with the two radiating arms 121 in the radiator 12 to form a closed loop, so that the equivalent aperture of the broadband radiating unit 1 is larger, the beam width is narrower, the level of the sector edge is reduced more quickly, and the unit gain is improved greatly.
In this embodiment, the outer contour of the top of the feeding balun 11 is square, and two parallel radiating arms 121 are connected to the same straight edge of the top of the feeding balun 11. Further, the two feeding pieces 13 are disposed on the top of the feeding balun 11 in a vertically staggered manner, and the two feeding pieces 13 are respectively connected between two diagonal corner ends of the top of the feeding balun 11 along the direction of the symmetric center line of the two radiating arms 121 of the radiator 12. In this embodiment, the feeding tab 13 and the feeding balun 11 are in a direct feeding manner, and in other embodiments, the feeding tab 13 and the feeding balun 11 may also be in a coupled feeding manner.
Further, the decoupling unit 122 may be a PCB, a sheet metal part, or a metalized plastic part, in this embodiment, the decoupling unit 122 is a PCB, and includes a dielectric substrate 1221 and a circuit layer 1222 disposed on the dielectric substrate 1221, two ends of the dielectric substrate 1221 are respectively connected to the two radiating arms 121 in the radiator 12, so that the circuit layer 1222 and the two radiating arms 121 form a closed loop, specifically, the circuit layer 1222 is disposed on an upper surface of the dielectric substrate 1221, and lower surfaces of two ends of the dielectric substrate 1221 are attached to an upper surface of the radiating arms 121. In this embodiment, the radiation arm 121 is coupled to the dielectric substrate 1221.
Further, an extension 1211 for supporting the dielectric substrate 1221 extends from the radiating arm 121 along a side away from the radiating arm 121 parallel thereto. By arranging the extension 1211, the supporting area of the radiation arm 121 on the dielectric substrate 1221 is increased, the connection strength of the radiation arm and the dielectric substrate is improved, the coupling area of the radiation arm and the dielectric substrate is also increased, and the coupling performance of the radiation arm and the dielectric substrate is improved.
In this embodiment, the circuit layer 1222 includes two feeding areas 12221 respectively disposed at two ends of the dielectric substrate 1221 and directly connected or coupled to the radiating arm 121, and a conducting section 12222 connected between the two feeding areas 12221, where the feeding area 12221 covers the extension 1211 along the projection of the radiating arm 121. The feeding area 12221 can greatly increase the coupling area between the line layer 1222 and the radiating arm 121, thereby improving the coupling effect. In one embodiment, the conducting segments 12222 are made of lines of different thicknesses.
In one embodiment, as shown in fig. 3, the conducting segment 12222 is linear, and specifically, the conducting segment 12222 is thin and has a width much smaller than that of the dielectric substrate 1221. By using the thin-line-shaped conductive segment 12222, the coupling between the line layer 1222 and the high-frequency radiating element 3 can be reduced, and the isolation and pattern performance of the antenna can be improved. In other embodiments, the conducting section may also be curved.
In one embodiment, as shown in fig. 4, two ends of the dielectric substrate 1221 are provided with conductive pillars 1223 along a thickness direction of the dielectric substrate 1221, and the conductive pillars 1223 are electrically connected to the radiating arms 121 and the circuit layer 1222. Specifically, the conductive post 1223 passes through the feed area 12221 and is soldered to the feed area 12221.
In this embodiment, the dielectric substrate 1221 is connected to an end of the radiating arm 121 away from the feeding balun 11. In other embodiments, the dielectric substrate 1221 may not be attached to the end of the radiation arm 121. As shown in fig. 5, the dielectric substrate 1221 is connected to the position of the radiation arm 121 that is 0.05 times of the free-space wavelength from the end of the radiation arm 121, and the broadband matching of the broadband radiation unit 1 can also be achieved by adjusting the parameters of the radiation arm 121, so that the connection position of the dielectric substrate 1221 and the radiation arm 121 can be changed according to actual needs.
Referring to fig. 6, the unit gain of the broadband radiating unit 1 in the working frequency band is shown, where the abscissa is the radiation angle of the broadband radiating unit 1, and the ordinate is the gain value of the broadband radiating unit 1, specifically, the unit gain in the working frequency band is 8.6dBi-9.6 dBi.
Combine fig. 7 to show, the utility model also provides an antenna specifically is a multifrequency antenna, including reflecting plate 2, all locate low frequency array and high frequency array on reflecting plate 2, low frequency array and high frequency array correspond and set up at least one low frequency radiating element and at least one high frequency radiating element 3, low frequency radiating element is foretell wide band radiating element 1, high frequency radiating element 3 install in the wide band radiating element 1 in two radiation arm 121 limited regions of radiator 12.
Furthermore, the high-frequency arrays are respectively arranged on two sides of the axis of the low-frequency array, and the distance between two adjacent broadband radiation units 1 is twice the distance between two high-frequency radiation units 3 in one high-frequency array. Specifically, the distance between two adjacent broadband radiation units 1 is the distance between the centers of two high-frequency radiation units 3, and similarly, the distance between two adjacent high-frequency radiation units 3 is the distance between the centers of two high-frequency radiation units 3.
In one embodiment, two sides of the axis of the low-frequency array are respectively provided with a high-frequency array, and the low-frequency array and the high-frequency array are both base station antennas with the horizontal beam width of 65 degrees.
By adopting the oscillator arrangement form, the arrangement of the high-frequency radiating unit 3 and the broadband radiating unit 1 is more reasonable, the mutual coupling between the high-frequency radiating unit 3 and the broadband radiating unit 1 is reduced, the arrangement of the high-frequency radiating unit 3 and the broadband radiating unit 1 is more compact, the antenna is more miniaturized, in addition, the whole gain of the antenna is improved due to the decoupling unit 122 on the broadband radiating unit 1, and the directional diagram performance is also improved.
In another embodiment, shown in fig. 8, the antenna includes a single low frequency array and four high frequency arrays, the high frequency arrays being arranged in two rows on either side of the axis of the low frequency array. The low-frequency array is a base station antenna with the horizontal plane beam width of 65 degrees, and the high-frequency array is a multi-beam base station antenna consisting of four lines of sub-arrays.
The foregoing is only a partial embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A broadband radiation unit is characterized in that: the high-frequency radiator comprises two pairs of orthogonal polarized radiators, each radiator comprises two radiating arms which are vertically connected with each other and a decoupling unit which is connected between the two radiating arms and jointly forms a closed loop, the decoupling unit is used for reducing mutual coupling with a high-frequency radiating unit, and two adjacent radiating arms of two adjacent radiators are arranged in parallel.
2. The broadband radiating element of claim 1, wherein: the decoupling unit comprises a dielectric substrate and a circuit layer arranged on the dielectric substrate, wherein two ends of the dielectric substrate are respectively connected with two radiation arms in the radiator, so that the circuit layer and the two radiation arms form a closed loop.
3. The broadband radiating element of claim 2, wherein: and conductive columns penetrate through two ends of the dielectric substrate along the thickness direction of the dielectric substrate, and are in conductive connection with the radiation arms and the circuit layer.
4. The broadband radiating element of claim 2, wherein: and an extension part for supporting the medium substrate is arranged on the radiating arm along one side far away from the radiating arm parallel to the radiating arm in an extending manner.
5. The broadband radiating element of claim 4, wherein: the circuit layer comprises two feeding areas which are respectively arranged at two ends of the dielectric substrate correspondingly and are directly connected or coupled with the radiation arms and a conducting section connected between the two feeding areas, and the feeding areas cover the extending parts.
6. The broadband radiating element of claim 5, wherein: the conducting section is linear or curved.
7. The broadband radiating element of claim 1, wherein: the four radiators are connected to the top end of the feed balun in a centrosymmetric mode, each feed piece feeds power to a pair of diagonally arranged radiators correspondingly, and the two feed pieces are distributed up and down and connected to the top of the feed balun along the direction of the symmetric center line of the two radiating arms of each radiator respectively.
8. The utility model provides an antenna, includes the reflecting plate, all locates low frequency array and high frequency array on the reflecting plate, low frequency array and high frequency array correspond and set up at least one low frequency radiating element and at least one high frequency radiating element, characterized by: the broadband radiating element of any one of claims 1 to 7, wherein the low-frequency radiating element is installed in an area defined by two radiating arms in a radiator in the broadband radiating element.
9. The antenna of claim 8, wherein: the two sides of the axis of the low-frequency array are respectively provided with the high-frequency arrays, and the distance between every two adjacent broadband radiation units is twice the distance between every two high-frequency radiation units in one high-frequency array.
10. The antenna of claim 9, wherein: two rows are respectively arranged on two sides of the axis of the low-frequency array of the high-frequency array.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922454334.7U CN210926312U (en) | 2019-12-30 | 2019-12-30 | Broadband radiation unit and antenna |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922454334.7U CN210926312U (en) | 2019-12-30 | 2019-12-30 | Broadband radiation unit and antenna |
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| CN210926312U true CN210926312U (en) | 2020-07-03 |
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| CN201922454334.7U Withdrawn - After Issue CN210926312U (en) | 2019-12-30 | 2019-12-30 | Broadband radiation unit and antenna |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110957569A (en) * | 2019-12-30 | 2020-04-03 | 京信通信技术(广州)有限公司 | Broadband radiation unit and antenna |
| CN113314833A (en) * | 2021-04-16 | 2021-08-27 | 华南理工大学 | Low-scattering radiation unit and multi-frequency common-aperture antenna array |
-
2019
- 2019-12-30 CN CN201922454334.7U patent/CN210926312U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110957569A (en) * | 2019-12-30 | 2020-04-03 | 京信通信技术(广州)有限公司 | Broadband radiation unit and antenna |
| CN113314833A (en) * | 2021-04-16 | 2021-08-27 | 华南理工大学 | Low-scattering radiation unit and multi-frequency common-aperture antenna array |
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