CN117394017A - Balun integrated low-frequency oscillator radiating unit and base station antenna - Google Patents
Balun integrated low-frequency oscillator radiating unit and base station antenna Download PDFInfo
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- CN117394017A CN117394017A CN202311315823.9A CN202311315823A CN117394017A CN 117394017 A CN117394017 A CN 117394017A CN 202311315823 A CN202311315823 A CN 202311315823A CN 117394017 A CN117394017 A CN 117394017A
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- 239000000758 substrate Substances 0.000 claims abstract description 78
- 230000005855 radiation Effects 0.000 claims abstract description 45
- 230000008878 coupling Effects 0.000 claims abstract description 42
- 238000010168 coupling process Methods 0.000 claims abstract description 42
- 238000005859 coupling reaction Methods 0.000 claims abstract description 42
- 230000008054 signal transmission Effects 0.000 claims abstract description 29
- 230000010287 polarization Effects 0.000 claims abstract description 4
- 238000005452 bending Methods 0.000 claims description 3
- 238000002955 isolation Methods 0.000 abstract description 5
- 238000005388 cross polarization Methods 0.000 abstract description 3
- 239000002184 metal Substances 0.000 abstract description 3
- 238000004891 communication Methods 0.000 description 5
- 230000001808 coupling effect Effects 0.000 description 3
- 238000003491 array Methods 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000463 material Substances 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
- 238000005516 engineering process Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
- H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
- H01Q1/246—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for base stations
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
The invention discloses a balun integrated low-frequency oscillator radiating unit and a base station antenna, wherein the low-frequency oscillator radiating unit comprises a first substrate; a first feed circuit and a second feed circuit; a second substrate; a signal transmission coupling surface; a first radiating arm set; the polarization directions of the first radiation arm group and the second radiation arm group are mutually perpendicular; by integrating the first feed circuit and the second feed circuit on the first substrate, the form of 90-degree intersection is not made any more, so that the circuit coupling of the radiation units is weakened, the self-isolation degree is improved, and the cross polarization signals received by adjacent radiation units are weakened; the first substrate occupies small space, and the space between the radiation units can be further reduced; the radiating surface feeds power to the signal transmission coupling surface, and energy is transmitted to the metal radiating arm in a coupling mode, so that the area of the PCB can be greatly reduced, and the cost of the vibrator unit is reduced.
Description
Technical Field
The invention relates to the field of base station antennas, in particular to a balun integrated low-frequency oscillator radiating unit and a base station antenna.
Background
With the development of communication technology, new communication spectrum communication systems are introduced, and several communication systems, namely 2G, 3G, 4G and 5G, coexist for a long time. Multisystem shared array antennas supporting more frequency bands and more systems are becoming mainstream products required by operators. The interference between different frequency bands of the antenna is reduced, and the miniaturization of the antenna is necessary.
When the antenna multi-band array is miniaturized, for example, a first antenna element operating in a low frequency band, a second antenna element in a middle frequency band, and a third antenna element in a high frequency band, electromagnetic environments are more complex, and mutual coupling between each frequency band is serious, which causes the following problems: a first antenna element configured to radiate in a low frequency band is excited by a second antenna element radiating in a medium frequency band, which overlaps a first harmonic portion of a low frequency band operating band, the first antenna element being excited to an operating band by radiation of the second antenna element currently radiating in the medium frequency band even if the first antenna element is currently inactive and does not radiate at all; accordingly, a large amount of energy radiated from the second antenna element is coupled to the first antenna element, and similarly, the antenna element of the intermediate frequency band is excited by the antenna element of the high frequency band, resulting in energy coupling, which results in deterioration of isolation between the multi-frequency antennas and deterioration of the antenna pattern index.
The radiation units in the existing frequency band are orthogonally arranged, the first feed balun and the second feed balun are coupled by the feed circuit, the self-isolation degree is poor, and the balun structure formed by the first feed balun and the second feed balun occupies a large space, so that when the multi-band array antenna is formed, the distance between the radiation unit working in the low frequency band and the adjacent radiation unit working in the high frequency band is relatively short, the mutual coupling between the high frequency band and the low frequency band is relatively short, the mutual coupling between the feed balun and the low frequency band is relatively long, and the miniaturization of the antenna is not facilitated; therefore, there is an urgent need for a balun-integrated low frequency oscillator radiating element and a base station antenna to solve the above problems.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the invention provides a balun integrated low-frequency oscillator radiating unit and a base station antenna.
The technical scheme adopted by the embodiment of the invention for solving the technical problems is as follows: a balun-integrated low frequency oscillator radiating element comprising:
a first substrate;
a first power supply circuit and a second power supply circuit disposed on the first substrate;
the second substrate is vertically embedded into the first substrate and is arranged as a plastic plate;
the signal transmission coupling surface is arranged on the second substrate and is electrically connected with the first feed circuit and the second feed circuit;
the first radiation arm group is arranged on the second substrate and is electrically connected with the signal transmission coupling surface;
the second radiation arm group is arranged on the second substrate and is electrically connected with the signal transmission coupling surface, and the polarization directions of the first radiation arm group and the second radiation arm group are mutually perpendicular.
Preferably, the first power supply circuit includes a first power supply section, a third power supply section, a first ground layer, and a second ground layer, and the second power supply circuit includes a second power supply section, a fourth power supply section, a third ground layer, and a fourth ground layer;
the first feed section is provided with a first straight line section electrically connected with the first grounding layer and a second straight line section electrically connected with the second grounding layer so as to form a microstrip line structure;
the second grounding layer is electrically connected with the signal transmission coupling surface so as to feed the first radiation arm group;
the third feed section is respectively and electrically connected with the first grounding layer and the signal transmission coupling surface so as to feed the first radiation arm group;
the second feed section is provided with a third straight line section electrically connected with the fourth grounding layer and a fourth straight line section electrically connected with the third grounding layer so as to form a microstrip line structure;
the fourth grounding layer is electrically connected with the signal transmission coupling surface so as to feed the second radiation arm group;
the fourth feeding section is electrically connected with the third grounding layer and the signal transmission coupling surface respectively so as to feed the second radiation arm group.
Preferably, the first substrate has a first side and a second side, the first feeding section, the second feeding section, the third feeding section and the fourth feeding section are disposed on the first side of the first substrate, the first ground layer, the second ground layer, the third ground layer and the fourth ground layer are disposed on the second side of the first substrate, the first ground layer is connected with the third feeding section through a metallized via hole, and the fourth ground layer is connected with the fourth feeding section through a metallized via hole.
Preferably, the first feeding section further comprises a first straight line section, the first straight line section is arranged from low to high along the length direction of the first substrate, the first straight line section is formed by bending along the width direction of the first substrate, and the second straight line section is arranged from high to low along the top of the first straight line section in parallel;
the second feeding section is arranged on the first substrate in parallel with the first feeding section;
the third feed section is bent along the width direction of the first substrate to form a second folded line section;
the fourth feed section is positioned between the fourth straight line section and the second substrate and is distributed from low to high along the length direction of the first substrate.
Preferably, the first straight line section is parallel to the first ground layer, the second straight line section is parallel to the second ground layer, the third straight line section is parallel to the fourth ground layer, and the fourth straight line section is parallel to the third ground layer.
Preferably, a first bonding pad and a second bonding pad which are communicated with two sides of the first substrate are arranged on the first substrate, and the first bonding pad is connected with the first feed section through a metallized via hole.
Preferably, the first radiating arm group and the second radiating arm group are provided with slow wave circuits.
Preferably, the first substrate and the second substrate are integrally formed.
A base station antenna comprises the low-frequency oscillator radiating element.
The invention has the beneficial effects that:
1. by integrating the first feed circuit and the second feed circuit on the first substrate, the 90-degree cross mode is not formed, the coupling effect between the two feed circuits is weakened, the circuit coupling of the radiation units is weakened, the self-isolation degree is improved, cross polarization signals received by adjacent radiation units are weakened, and when the radiation units are applied to the multi-band array antenna, the mutual coupling of different frequency arrays and the same frequency array is correspondingly reduced;
2. the first substrate occupies small space, and the space between the radiation units can be further reduced;
3. the radiating surface feeds power to the signal transmission coupling surface, and energy is transmitted to the metal radiating arm in a coupling mode, so that the area of the PCB can be greatly reduced, and the cost of the vibrator unit is reduced.
Drawings
The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
fig. 1 is a schematic diagram of a first structure of a balun-integrated low-frequency oscillator radiating unit;
fig. 2 is a schematic diagram of a second structure of a balun-integrated low-frequency oscillator radiating unit;
FIG. 3 is a first schematic structural view of a first substrate;
fig. 4 is a second schematic structural view of the first substrate.
Detailed Description
Reference will now be made in detail to the present embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein the accompanying drawings are used to supplement the description of the written description so that one can intuitively and intuitively understand each technical feature and overall technical scheme of the present invention, but not to limit the scope of the present invention.
In the description of the present invention, plural means two or more, and greater than, less than, exceeding, etc. are understood to not include the present number, and the above, below, within, etc. are understood to include the present number. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, it should be understood that references to orientation descriptions such as upper, lower, front, rear, left, right, etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description of the present invention and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.
In the present invention, unless clearly defined otherwise, the terms "disposed," "mounted," "connected," and the like are to be construed broadly and may be connected directly or indirectly through an intermediary; the connecting device can be fixedly connected, detachably connected and integrally formed; may be a mechanical connection; may be a communication between two elements or an interaction between two elements. The specific meaning of the words in the invention can be reasonably determined by a person skilled in the art in combination with the specific content of the technical solution.
Referring to fig. 1 to 4, a balun-integrated low frequency oscillator radiating unit includes:
a first substrate 1;
a first power feeding circuit and a second power feeding circuit provided on the first substrate 1;
a second substrate 2 vertically embedded in the first substrate 1;
a signal transmission coupling surface 102 provided on the second substrate 2 and electrically connected to the first feeding circuit and the second feeding circuit;
a first radiation arm group 201 disposed on the second substrate 2 and electrically connected to the signal transmission coupling surface 102;
the second radiating arm group 202 is disposed on the second substrate 2 and electrically connected to the signal transmission coupling surface 102, and polarization directions of the first radiating arm group 201 and the second radiating arm group 202 are perpendicular to each other.
In the invention, one end of a first substrate 1 is connected with a signal transmission coupling surface 102, a first feed circuit and a second feed circuit are arranged on the first substrate 1, so that the first substrate 1 occupies a small space, signals are fed into the signal transmission coupling surface 102 arranged on a radiation surface through the first feed circuit and the second feed circuit, signals are input into a first radiation arm group 201 and a second radiation arm group 202 through the signal transmission coupling surface 102, wherein an upper left radiation arm and a lower right radiation arm in fig. 2 form the first radiation arm group 201, namely a positive 45-degree polarized radiation arm, an upper right radiation arm and a lower left radiation arm in fig. 2 form a second radiation arm group 202, namely a negative 45-degree polarized radiation arm, and 2-A, 2-B, 2-C and 2-D in fig. 2 are 4 feed points respectively and are used for communicating the first feed circuit, the second feed circuit and the signal transmission coupling surface 102; by integrating the first feed circuit and the second feed circuit on the first substrate, the 90-degree cross mode is not formed, the coupling effect between the two feed circuits is weakened, the circuit coupling of the radiation units is weakened, the self-isolation degree is improved, cross polarization signals received by adjacent radiation units are weakened, when the radiation units are applied to the multi-band array antenna, the mutual coupling of different frequency arrays and the same frequency array is correspondingly reduced, and the miniaturization of the array antenna is facilitated; the occupied space of the first substrate is small, and the space between the radiation units can be further reduced; the radiating surface feeds the signal transmission coupling surface, and energy is transmitted to the metal radiating arm in a coupling mode, so that the area of a PCB (printed circuit board) can be greatly reduced, and the cost of the vibrator unit is reduced; it should be noted that, the radiating surface may include a PCB mode and a mode of transmitting energy through the coupling surface, and the second substrate is preferably a plastic support member for supporting the first radiating arm set 201 and the second radiating arm set 202, the plastic material has an influence on other frequency bands far smaller than that of FR4 and other materials, and the process of manufacturing the plastic and the first radiating arm set 201 and the second radiating arm set 202 is simpler, and at the same time, shan Balun corresponding to this example is not only applicable to this oscillator surface mode, but also to a conventional PCB oscillator surface mode.
Preferably, the first feeding circuit comprises a first feeding section 301, a third feeding section 303, a first ground layer 404 and a second ground layer 403, and the second feeding circuit comprises a second feeding section 302, a fourth feeding section 304, a third ground layer 402 and a fourth ground layer 401;
the first feeding section 301 has a first straight line section electrically connected to the first ground layer 404 and a second straight line section electrically connected to the second ground layer 403 to form a microstrip line structure;
the second ground layer 403 is electrically connected to the signal transmission coupling surface 102 to feed the first radiating arm group 201;
the third feeding section 303 is electrically connected to the first ground layer 404 and the signal transmission coupling surface 102, respectively, to feed the first radiating arm group 201;
the second feeding section 302 has a third straight line section electrically connected to the fourth ground layer 401 and a fourth straight line section electrically connected to the third ground layer 402 to form a microstrip line structure;
the fourth ground 401 layer is electrically connected to the signal transmission coupling surface 102 to feed the second radiating arm set 202;
the fourth feeding segment 304 is electrically connected to the third ground plane 402 and the signal transmission coupling plane 102, respectively, to feed the second radiating arm group 202; the first feeding circuit can control the first radiating arm group 201 and the second feeding circuit can control the second radiating arm group 202, the first feeding circuit and the second feeding circuit are integrated on the first substrate 1, meanwhile, the first feeding circuit and the second feeding circuit are isolated, and the coupling effect is reduced.
Preferably, the first substrate 1 has a first side and a second side, the first power feeding section 301, the second power feeding section 302, the third power feeding section 303 and the fourth power feeding section 304 are disposed on the first side of the first substrate 1, the first ground layer 404, the second ground layer 403, the third ground layer 402 and the fourth ground layer 401 are disposed on the second side of the first substrate 1, the first ground layer 404 is connected to the third power feeding section 303 through a metallized via 406, and the fourth ground layer 401 is connected to the fourth power feeding section 304 through a metallized via 405.
Preferably, the first feeding section 301 further includes a first straight line section, the first straight line section is arranged from low to high along the length direction of the first substrate 1, the first straight line section is formed by bending along the width direction of the first substrate 1, and the second straight line section is arranged from high to low along the top of the first straight line section in parallel;
the second feeding section 302 is arranged on the first substrate 1 in parallel with the first feeding section 301;
the third feeding section 303 is bent along the width direction of the first substrate 1 to form a second folded section;
the fourth feeding section 304 is located between the fourth straight line section and the second substrate 2 and is arranged from low to high along the length direction of the first substrate 1.
Preferably, the first straight line segment is parallel to the first ground layer 404, the second straight line segment is parallel to the second ground layer 403, the third straight line segment is parallel to the fourth ground layer 401, and the fourth straight line segment is parallel to the third ground layer 402.
The first substrate 1 is provided with a first bonding pad and a second bonding pad which are communicated with two sides of the first substrate 1, and the first bonding pad is connected with the first feeding section 301 through a metallized via 407.
The first radiation arm group 201 and the second radiation arm group 202 are internally provided with slow wave circuits; the device is used for increasing the electric length and reducing the oscillator surface size.
The first substrate 1 and the second substrate 2 are integrally formed; or the first substrate 1 and the second substrate 2 are formed by welding independent plate bodies.
A base station antenna comprises the low-frequency oscillator radiating element.
Of course, the present invention is not limited to the above-described embodiments, and those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of the present invention, and these equivalent modifications and substitutions are included in the scope of the present invention as defined in the appended claims.
Claims (9)
1. A balun-integrated low frequency oscillator radiating element, comprising:
a first substrate (1);
a first power feeding circuit and a second power feeding circuit provided on the first substrate (1);
a second substrate (2) vertically embedded in the first substrate (1), the second substrate (2) being provided as a plastic plate;
a signal transmission coupling surface (102) provided on the second substrate (2) and electrically connected to the first and second power feeding circuits;
a first radiating arm group (201) disposed on the second substrate (2) and electrically connected to the signal transmission coupling surface (102);
the second radiation arm group (202) is arranged on the second substrate (2) and is electrically connected with the signal transmission coupling surface (102), and the polarization directions of the first radiation arm group (201) and the second radiation arm group (202) are mutually perpendicular.
2. A balun-integrated low-frequency oscillator radiating element as claimed in claim 1, wherein: the first power supply circuit comprises a first power supply section (301), a third power supply section (303), a first grounding layer (404) and a second grounding layer (403), and the second power supply circuit comprises a second power supply section (302), a fourth power supply section (304), a third grounding layer (402) and a fourth grounding layer (401);
the first feeding section (301) has a first straight line section electrically connected to the first ground layer (404) and a second straight line section electrically connected to the second ground layer (403) to form a microstrip line structure;
the second ground layer (403) is electrically connected to the signal transmission coupling face (102) to feed the first radiating arm group (201);
the third feeding section (303) is electrically connected with the first grounding layer (404) and the signal transmission coupling surface (102) respectively so as to feed the first radiation arm group (201);
the second feeding section (302) has a third straight line section electrically connected to the fourth ground (401) layer and a fourth straight line section electrically connected to the third ground layer (402) to form a microstrip line structure;
the fourth ground (401) layer is electrically connected to the signal transmission coupling face (102) to feed the second radiating arm set (202);
the fourth feeding section (304) is electrically connected to the third ground plane (402) and the signal transmission coupling plane (102), respectively, for feeding the second radiating arm group (202).
3. A balun-integrated low-frequency oscillator radiating element as claimed in claim 2, wherein: the first substrate (1) is provided with a first side surface and a second side surface, the first power feeding section (301), the second power feeding section (302), the third power feeding section (303) and the fourth power feeding section (304) are arranged on the first side surface of the first substrate (1), the first grounding layer (404), the second grounding layer (403), the third grounding layer (402) and the fourth grounding layer (401) are arranged on the second side surface of the first substrate (1), the first grounding layer (404) is connected with the third power feeding section (303) through a metallized via hole (406), and the fourth grounding layer (401) is connected with the fourth power feeding section (304) through a metallized via hole (405).
4. A balun-integrated low-frequency oscillator radiating element as claimed in claim 2, wherein:
the first feeding section (301) further comprises a first straight line section, the first straight line section is arranged from low to high along the length direction of the first substrate (1), the first straight line section is formed by bending along the width direction of the first substrate (1), and the second straight line section is arranged from high to low along the top of the first straight line section in parallel;
the second feed section (302) is arranged on the first substrate (1) in parallel with the first feed section (301);
the third feeding section (303) is bent along the width direction of the first substrate (1) to form a second folded section;
the fourth feeding section (304) is located between the fourth straight line section and the second substrate (2) and is distributed from low to high along the length direction of the first substrate (1).
5. A balun-integrated low-frequency oscillator radiating element as claimed in claim 3, wherein: the first straight line segment is parallel to the first grounding layer (404), the second straight line segment is parallel to the second grounding layer (403), the third straight line segment is parallel to the fourth grounding layer (401), and the fourth straight line segment is parallel to the third grounding layer (402).
6. A balun-integrated low-frequency oscillator radiating element as claimed in claim 2, wherein: the first substrate (1) is provided with a first bonding pad and a second bonding pad which are communicated with two sides of the first substrate (1), and the first bonding pad is connected with the first feeding section (301) through a metallized via hole (407).
7. A balun-integrated low-frequency oscillator radiating element as claimed in claim 1, wherein: the first radiation arm group (201) and the second radiation arm group (202) are internally provided with slow wave circuits.
8. A balun-integrated low-frequency oscillator radiating element as claimed in claim 1, wherein: the first substrate (1) and the second substrate (2) are integrally formed.
9. A base station antenna, characterized by: comprising a low frequency oscillator radiating element as claimed in any one of claims 1-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311315823.9A CN117394017A (en) | 2023-10-11 | 2023-10-11 | Balun integrated low-frequency oscillator radiating unit and base station antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311315823.9A CN117394017A (en) | 2023-10-11 | 2023-10-11 | Balun integrated low-frequency oscillator radiating unit and base station antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117394017A true CN117394017A (en) | 2024-01-12 |
Family
ID=89438324
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311315823.9A Pending CN117394017A (en) | 2023-10-11 | 2023-10-11 | Balun integrated low-frequency oscillator radiating unit and base station antenna |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117394017A (en) |
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2023
- 2023-10-11 CN CN202311315823.9A patent/CN117394017A/en active Pending
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