CN111817009B - Dual-frequency feed network and antenna - Google Patents
Dual-frequency feed network and antenna Download PDFInfo
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- CN111817009B CN111817009B CN202010737118.8A CN202010737118A CN111817009B CN 111817009 B CN111817009 B CN 111817009B CN 202010737118 A CN202010737118 A CN 202010737118A CN 111817009 B CN111817009 B CN 111817009B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
- H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
- H01Q3/30—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array
- H01Q3/34—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array by electrical means
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- 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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/50—Feeding or matching arrangements for broad-band or multi-band operation
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Abstract
The embodiment of the invention relates to the technical field of mobile communication, and discloses a dual-frequency feed network and an antenna, wherein the dual-frequency feed network comprises the following components: the power divider comprises a first phase shifter circuit, a second phase shifter circuit, a first power dividing and combining circuit and a second power dividing and combining circuit; the first power dividing and combining circuit and the second power dividing and combining circuit are both in signal connection with the first phase shifter circuit, and the first power dividing and combining circuit and the second power dividing and combining circuit are both in signal connection with the second phase shifter circuit; the first power dividing and combining circuit and the second power dividing and combining circuit are both used for outputting dual-band signals at the same port. According to the dual-frequency feed network provided by the embodiment of the invention, the number of ports is reduced by multiplexing the ports among different frequency bands, and the size of the feed network is reduced to a certain extent, so that the overall size is smaller, and the cost is reduced.
Description
Technical Field
The invention relates to the technical field of mobile communication, in particular to a double-frequency feed network and an antenna.
Background
The rapid development and application of the mobile communication base station antenna technology strongly promote the development of the base station antenna towards miniaturization, integration and multifunction (multi-band, multi-polarization and multi-purpose). As one of important components in the antenna subsystem of the base station, the antenna feeding network has high performance and is miniaturized, which is one of important factors that restrict further miniaturization of the antenna system of the base station. Therefore, designing a high-performance and miniaturized base station antenna feeding network has become a key point of antenna technology research.
The ports of each frequency band of the traditional dual-frequency phase shifter feed network are independently used, and the feed networks among the frequency bands are mutually isolated. Although the feed network is relatively simple in structure, the feed network causes the number of single ports to be too large, and the matching lines of output ports of the phase shifters are too many, so that the layout is relatively difficult.
Disclosure of Invention
The embodiment of the invention provides a dual-frequency feed network and an antenna, which are used for solving or partially solving the problem that the number of output ports of the existing dual-frequency feed network is too large.
In a first aspect, an embodiment of the present invention provides a dual-band feeding network, including: the power divider comprises a first phase shifter circuit, a second phase shifter circuit, a first power dividing and combining circuit and a second power dividing and combining circuit; the first power dividing and combining circuit and the second power dividing and combining circuit are both in signal connection with the first phase shifter circuit, and the first power dividing and combining circuit and the second power dividing and combining circuit are both in signal connection with the second phase shifter circuit; the first power dividing and combining circuit and the second power dividing and combining circuit are both used for outputting dual-band signals at the same port.
On the basis of the technical scheme, the first phase shifter circuit and the second phase shifter circuit are both one-to-three phase shifter circuits.
On the basis of the above technical solution, the first power dividing/combining circuit and the second power dividing/combining circuit each include: the first frequency band one-to-two power divider, the second frequency band one-to-two power divider, the first dual-frequency combiner and the second dual-frequency combiner;
the first frequency band one-to-two power divider is respectively connected with the corresponding signals of the first dual-frequency combiner and the second dual-frequency combiner, and the second frequency band one-to-two power divider is respectively connected with the corresponding signals of the first dual-frequency combiner and the second dual-frequency combiner.
On the basis of the above technical solution, the first dual-frequency combiner, the first frequency band one-to-two power divider, and the first phase shifter circuit are all formed on a first dielectric substrate.
On the basis of the above technical solution, the second dual-frequency combiner, the second frequency band-to-two power divider, and the second phase shifter circuit are all formed on a second dielectric substrate.
On the basis of the technical scheme, the first dielectric substrate is positioned above the second dielectric substrate.
On the basis of the technical scheme, the dielectric constants of the first dielectric substrate and the second dielectric substrate are 2.2-10.2.
On the basis of the technical scheme, the thickness of the first medium base material and the thickness of the second medium base material are 0.7-2.7 mm.
In a second aspect, an embodiment of the present invention provides an antenna, including the dual-band feeding network provided in the foregoing technical solution.
In the dual-band feeding network and the antenna provided by the embodiments of the present invention, a first frequency band signal output by a first phase shifter circuit respectively enters a first power dividing/combining circuit and a second power dividing/combining circuit, a second frequency band signal output by a second phase shifter circuit respectively enters the first power dividing/combining circuit and the second power dividing/combining circuit, and input ports of the first power dividing/combining circuit and the second power dividing/combining circuit can both output the first frequency band signal and the second frequency band signal at the same time. According to the dual-frequency feed network provided by the embodiment of the invention, the number of ports is reduced by multiplexing the ports among different frequency bands, and the size of the feed network is reduced to a certain extent, so that the overall size is smaller, and the cost is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a dual-frequency feed network according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a first power splitting and combining circuit according to an embodiment of the present invention;
fig. 3 is an assembly diagram of a one-to-three phase shifter circuit according to an embodiment of the invention.
Reference numerals:
1. a first phase shifter circuit; 11. a first phase shifter circuit input; 12. a first phase shifter circuit first output; 13. a first phase shifter circuit second output; 14. a third output terminal of the first phase shifter circuit; 2. a second phase shifter circuit; 21. a second phase shifter circuit input; 22. a second phase shifter circuit first output; 23. a second phase shifter circuit second output; 24. a third output terminal of the second phase shifter circuit; 3. a first layer of feed network; 4. a second layer of feed network; 5. a first power splitting and combining circuit; 51. a first frequency band one-to-two power divider; 511. the first frequency band one-to-two power divider input end; 512. a first output end of the first frequency band one-to-two power divider; 513. a second output end of the first frequency band one-to-two power divider; 52. a second frequency band one-to-two power divider; 521. the second frequency band is one-to-two input end of the power divider; 522. a first output end of the second frequency band one-to-two power divider; 523. a second output end of the second frequency band one-to-two power divider; 53. a first dual-frequency combiner; 531. an input end of a first dual-frequency combiner; 533. a first frequency band output end of the first dual-frequency combiner; 532. a second frequency band output end of the first dual-frequency combiner; 54. a second dual-frequency combiner; 541. an input end of a second dual-frequency combiner; 542. a first frequency band output end of the second dual-frequency combiner; 543. a second frequency band output end of the second dual-frequency combiner; 6. a second power splitting and combining circuit; 611. the other first frequency band is used for dividing the input end of the power divider into two parts; 621. the other second frequency band is used as the input end of the one-to-two power divider; 631. another first dual-frequency combiner input; 641. and the other input end of the second dual-frequency combiner.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Fig. 1 is a schematic structural diagram of a dual-frequency feed network according to an embodiment of the present invention, and as shown in fig. 1, the dual-frequency feed network according to the embodiment of the present invention includes: the power divider comprises a first phase shifter circuit 1, a second phase shifter circuit 2, a first power dividing and combining circuit and a second power dividing and combining circuit;
the first power dividing and combining circuit and the second power dividing and combining circuit are in signal connection with a first phase shifter circuit 1, and the first power dividing and combining circuit and the second power dividing and combining circuit are in signal connection with a second phase shifter circuit 2; the first power splitting and combining circuit and the second power splitting and combining circuit are both used for outputting dual-band signals at the same port.
In the embodiment of the present invention, a first frequency band signal output by the first phase shifter circuit 1 respectively enters the first power dividing/combining circuit and the second power dividing/combining circuit, a second frequency band signal output by the second phase shifter circuit 2 respectively enters the first power dividing/combining circuit and the second power dividing/combining circuit, and input ports of the first power dividing/combining circuit and the second power dividing/combining circuit can both output the first frequency band signal and the second frequency band signal at the same time. According to the dual-frequency feed network provided by the embodiment of the invention, the number of ports is reduced by multiplexing the ports among different frequency bands, and the size of the feed network is reduced to a certain extent, so that the overall size is smaller, and the cost is reduced.
It should be noted that the output end of the dual-frequency feeding network can be the ± 45 ° polarization feeding of the dual-frequency array antenna with at least two identical array antenna elements.
Fig. 2 is a schematic structural diagram of a first power splitting/combining circuit according to an embodiment of the present invention, and as shown in fig. 2, the first power splitting/combining circuit 5 and the second power splitting/combining circuit 6 according to the embodiment of the present invention have the same structure, and the structure of the first power splitting/combining circuit 5 is taken as an example for description below:
the first power dividing/combining circuit 5 includes a first frequency-band one-to-two power divider 51, a second frequency-band one-to-two power divider 52, a first dual-frequency combiner 53 and a second dual-frequency combiner 54;
the first band-to-two power divider 51 is respectively connected with the first dual-frequency combiner 53 and the second dual-frequency combiner 54 by corresponding signals, and the second band-to-two power divider 52 is respectively connected with the first dual-frequency combiner 53 and the second dual-frequency combiner 54 by corresponding signals.
It should be noted that the first output terminal 512 of the first frequency band one-to-two power divider is in signal connection with the first frequency band output terminal 542 of the second dual-frequency combiner, and the second output terminal 513 of the first frequency band one-to-two power divider is in signal connection with the first frequency band output terminal 533 of the first dual-frequency combiner;
the first output end 522 of the second frequency band one-to-two power divider is in signal connection with the second frequency band output end 532 of the first dual-frequency combiner, and the second output end 523 of the second frequency band one-to-two power divider is in signal connection with the second frequency band output end 543 of the second dual-frequency combiner;
the first dual-frequency combiner input terminal 531 and the second dual-frequency combiner input terminal 541 serve as composite ports, and can output both the first frequency band signal and the second frequency band signal; at this time, the first band-by-two power divider input terminal 511 is used for inputting the first band signal, and the second band-by-two power divider input terminal 521 is used for inputting the second band signal.
On the basis of the above-described embodiment, as shown in fig. 3, the first phase shifter circuit 1 and the second phase shifter circuit 2 are both one-to-three phase shifter circuits.
It should be noted that the second output end 13 of the first phase shifter circuit is in signal connection with the input end 511 of the first frequency-band one-to-two power divider, and the third output end 14 of the first phase shifter circuit is in signal connection with the input end 611 of the other first frequency-band one-to-two power divider; a second output terminal 23 of the second phase shifter circuit is signal-connected to the input terminal 521 of the second band-by-two power divider, and a third output terminal of the second phase shifter circuit is signal-connected to the input terminal 621 of the other second band-by-two power divider.
It can be understood that the first layer feed network 3 has four ports: a first phase shifter circuit input 11, a first phase shifter circuit first output 12, a first dual-frequency combiner input 531, another first dual-frequency combiner input 631;
the second layer feed network 4 has four ports: a second phase shifter circuit input 21, a second phase shifter circuit first output 22, a second dual frequency combiner input 541, another second dual frequency combiner input 641.
It should be noted that the other first dual-frequency combiner input end 631 and the other second dual-frequency combiner input end 641 are used as composite ports, and can output both the first frequency band signal and the second frequency band signal.
At this time, the first frequency band one-to-two power divider 51, the first dual-frequency combiner 53, the first phase shifter circuit 1, the other first frequency band one-to-two power divider, and the other first dual-frequency combiner are located on the first dielectric substrate; the second band-to-two power divider 52, the second dual-band combiner 54, another second band-to-two power divider, another second dual-band combiner, and the second phase shifter circuit 2 are located on the second dielectric substrate. The first frequency band-to-two power divider 51, the first dual-frequency combiner 53, the first phase shifter circuit 1, the other first frequency band-to-two power divider, and the other first dual-frequency combiner serve as the first layer feed network 3, and the second frequency band-to-two power divider 52, the second dual-frequency combiner 54, the other second frequency band-to-two power divider, the other second dual-frequency combiner, and the second phase shifter circuit 2 serve as the second layer feed network 4.
It can be understood that the dielectric constant of the first dielectric substrate and the dielectric constant of the second dielectric substrate are 2.2 to 10.2. Wherein, the dielectric constant of the first dielectric substrate and the second dielectric substrate can be 8.
The thickness of the first dielectric substrate and the second dielectric substrate is 0.7 to 2.7 mm. Wherein, the thickness of the first medium substrate and the second medium substrate can be 2 mm.
In the embodiment of the present invention, after a signal enters through the first phase shifter circuit input end 11 and passes through the first phase shifter circuit 1, three branches are generated, wherein the first branch directly outputs the signal through the first phase shifter circuit first output end 12, and the generated phase is marked as 0; when the signal passes through the second branch and the third branch, the serial phase-shifting branches of the two branches can enable the second output end 13 of the first phase shifter circuit and the third output end 14 of the first phase shifter circuit to generate the same phase difference psi, the signal output from the second output end 13 of the first phase shifter circuit generates the phase difference psi, and the signal output from the third output end 14 of the first phase shifter circuit generates the phase difference-psi;
when a signal passes through the input end 511 of the first frequency band one-to-two power divider and then passes through the one-to-two power divider circuit, one branch is directly output, the phase difference generated by the input end 11 of the first phase shifter circuit is 0, and the other input end 631 of the first frequency combiner of the other branch generates the phase difference psi after passing through the serial phase shifting branches, so that for the first layer feed network 3, when the input end 511 of the first frequency band one-to-two power divider is conducted with the output end of the one-to-three power divider circuit of the first layer feed network 3, the two output ends thereof are subjected to phase superposition, the phase difference of the input end 531 of the first dual-frequency combiner is psi, and the phase difference generated by the input end 541 of the second dual-frequency combiner is 2 psi; similarly, another first dual-frequency combiner input 631 produces a-psi phase difference and another second dual-frequency combiner input 641 produces a-2 psi phase difference. The phase differences generated at the five first frequency band signal output ports, i.e., the second dual-frequency combiner input 541, the first frequency band-one-two power divider second output 513, the first phase shifter circuit input 11, the other first dual-frequency combiner input 631 and the other first frequency band-one-two power divider input 611, are 2 ψ, ψ, 0, - ψ, -2 ψ, respectively.
It should be noted that, for the five second frequency band signal output ports, i.e., the second dual-frequency combiner input port 541, the first frequency band-to-two power divider second output port 513, the second phase shifter circuit first output port 22, the other first dual-frequency combiner input port 631 and the other first frequency band-to-two power divider input port 611, the phase differences are 2 ψ, ψ, 0, - ψ, -2 ψ, respectively.
It can be understood that the phase shift function is realized by the sliding of the dielectric sheet between the output ends of the one-to-three phase shifter circuit, so that the linear change of the length of the partially covered dielectric and the length of the uncovered dielectric covering the output ends changes the phase.
In addition, the embodiment of the invention also provides an antenna which comprises the dual-frequency feed network provided by the embodiment.
According to the antenna provided by the embodiment of the invention, after the feed network is used, the overall size of the antenna is smaller, and the cost is reduced.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (8)
1. A dual-frequency feed network, comprising: the power divider comprises a first phase shifter circuit, a second phase shifter circuit, a first power dividing and combining circuit and a second power dividing and combining circuit;
the first power dividing and combining circuit and the second power dividing and combining circuit are both in signal connection with the first phase shifter circuit, and the first power dividing and combining circuit and the second power dividing and combining circuit are both in signal connection with the second phase shifter circuit; the first power dividing and combining circuit and the second power dividing and combining circuit are both used for outputting dual-band signals at the same port;
the first power dividing/combining circuit and the second power dividing/combining circuit both include: the first frequency band one-to-two power divider, the second frequency band one-to-two power divider, the first dual-frequency combiner and the second dual-frequency combiner;
the first frequency band one-to-two power divider is respectively connected with the corresponding signals of the first dual-frequency combiner and the second dual-frequency combiner, and the second frequency band one-to-two power divider is respectively connected with the corresponding signals of the first dual-frequency combiner and the second dual-frequency combiner.
2. The dual-frequency feed network of claim 1, wherein the first phase shifter circuit and the second phase shifter circuit are each a one-to-three phase shifter circuit.
3. The dual-band feed network of claim 1, wherein the first dual-band combiner, the first band-to-two power divider, and the first phase shifter circuit are all formed on a first dielectric substrate.
4. The dual-band feed network of claim 3, wherein the second dual-band combiner, the second band-to-two power divider, and the second phase shifter circuit are all formed on a second dielectric substrate.
5. The dual frequency feed network of claim 4, wherein the first dielectric substrate is positioned above the second dielectric substrate.
6. The dual-band feed network of claim 4, wherein the dielectric constant of the first dielectric substrate and the dielectric constant of the second dielectric substrate are 2.2-10.2.
7. The dual-band feed network of claim 4, wherein the thickness of the first dielectric substrate and the thickness of the second dielectric substrate are 0.7-2.7 mm.
8. An antenna characterized by comprising the dual frequency feed network of any of claims 1 to 7.
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| CN202010737118.8A CN111817009B (en) | 2020-07-28 | 2020-07-28 | Dual-frequency feed network and antenna |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112436277B (en) * | 2020-10-27 | 2023-04-14 | 中信科移动通信技术股份有限公司 | Array antenna |
| CN116783777A (en) * | 2020-12-31 | 2023-09-19 | 华为技术有限公司 | Feed network, antenna system, base station and beam forming method |
| CN112886171B (en) * | 2021-01-06 | 2022-04-08 | 武汉虹信科技发展有限责任公司 | Power dividing combiner, feed network and electrically-controlled antenna |
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