CN215816326U - Combiner cavity phase shifter and base station antenna - Google Patents
Combiner cavity phase shifter and base station antenna Download PDFInfo
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- CN215816326U CN215816326U CN202121264307.4U CN202121264307U CN215816326U CN 215816326 U CN215816326 U CN 215816326U CN 202121264307 U CN202121264307 U CN 202121264307U CN 215816326 U CN215816326 U CN 215816326U
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Abstract
The utility model relates to the technical field of base station antennas, in particular to a combining cavity phase shifter and a base station antenna, which comprise: the phase shifter comprises a phase shifter cavity, a first circuit substrate and a second circuit substrate are arranged in the phase shifter cavity in an up-down stacked mode, the first circuit substrate is provided with a first phase shifting circuit, and the first phase shifting circuit comprises a first phase shifting module and a first power dividing module; the second circuit substrate is provided with a second phase-shifting circuit, and the second phase-shifting circuit comprises a second phase-shifting module and a second power dividing module; the dual-frequency combiner comprises a first combiner, a second combiner, a matching connecting piece and a combiner output end; the first combiner is arranged on the first circuit substrate and is connected with the output end of the first power dividing module in series; the second combiner is arranged on the second circuit substrate and is connected with the output end of the second power dividing module in series; the first combiner and the second combiner are connected with the combiner output end through the matching connecting piece, and the combiner can be used for transmitting the signal combination of the two radiation frequency bands, so that the use amount of cables is reduced.
Description
Technical Field
The utility model relates to the technical field of base station antennas, in particular to a combiner cavity phase shifter and a base station antenna.
Background
With the update of the communication system, the concurrent systems and frequency bands in the mobile communication basic network are more and more. Because the frequency bands of the multi-system base station antenna are more and more, the feed network is more and more complex, the size requirement of the base station antenna is less and less, the existing phase shifter is necessary to be improved, signals of at least two radiation frequency bands can be combined for transmission, the using amount of cables is reduced, and the multi-system base station antenna meets the trend requirement of the base station antenna for the multi-frequency band miniaturization development.
SUMMERY OF THE UTILITY MODEL
The present invention is directed to a combiner cavity phase shifter and a base station antenna, which are used to solve one or more of the problems of the prior art and provide at least one of the advantages of the present invention.
In order to achieve the purpose, the utility model provides the following technical scheme:
a combiner cavity phase shifter, comprising:
the phase shifter comprises a phase shifter cavity, a phase shifter and a phase shifter, wherein a first circuit substrate and a second circuit substrate are arranged in the phase shifter cavity, and the first circuit substrate and the second circuit substrate are vertically stacked;
the first phase shift circuit is arranged on the first circuit substrate and comprises a first phase shift module and a first power division module; the first phase shifting module is provided with a first phase shifting medium sliding sheet, and the first phase shifting module and the first phase shifting medium sliding sheet relatively slide along the left-right direction to shift the phase of a first frequency band; the first power division module comprises a plurality of paths of cascaded first power dividers, and the output end of each path of first power divider is sequentially connected with one port of the first phase shifting module;
the second phase shift circuit is arranged on the second circuit substrate and comprises a second phase shift module and a second power division module; a second phase-shifting dielectric sliding sheet is arranged on the second phase-shifting module, and the second phase-shifting module and the second phase-shifting dielectric sliding sheet relatively slide along the left-right direction to shift the phase of a second frequency band; the second power division module comprises a plurality of paths of cascaded second power dividers, and the output end of each path of second power divider is sequentially connected with one port of the second phase shifting module;
the dual-frequency combiner comprises a first combiner, a second combiner, a matching connecting piece and a combiner output end; the first combiner is arranged on the first circuit substrate and is connected with the output end of the first power dividing module in series; the second combiner is arranged on the second circuit substrate and is connected with the output end of the second power dividing module in series; the first combiner and the second combiner are connected with the combiner output end through a matching connecting piece.
As a further improvement of the above technical solution, the combining output end is disposed on the first circuit substrate or the second circuit substrate.
As a further improvement of the above technical solution, the first circuit substrate and the second circuit substrate have via holes that are vertically communicated, the matching connector passes through the via holes to be respectively connected to the output end of the first combiner and the output end of the second combiner, and the output end of the matching connector is connected to the combiner output end.
As a further improvement of the above technical solution, the first power divider and the second power divider are wilkinson power dividers, each wilkinson power divider includes 2 branches, each branch includes two impedance strip lines connected in series, and each impedance strip line has a length of 1/4 wavelengths.
As a further improvement of the above technical solution, the wilkinson power divider further includes an isolation resistor, and two ends of the isolation resistor are respectively connected to nodes between the impedance striplines connected in series in the two branches.
As a further improvement of the above technical solution, one branch of the first power divider is connected to the first combiner, and the other branch of the first power divider is connected to the first phase shift module to form a phase-shifted signal, and then is connected to the first power divider of the next stage; one branch of the second power divider is connected with the second combiner, and the other branch of the second power divider is connected with the second phase shifting module to form a phase-shifted signal and then is connected with the second power divider of the next stage.
As a further improvement of the above technical solution, the first power divider of each stage has a different power dividing ratio, the second power divider of each stage has a different power dividing ratio, and the first power divider and the second power divider of the same stage have the same power.
As a further improvement of the above technical solution, the first combiner and the second combiner each include 3 main branch striplines connected in series and 2 open branch striplines, and the 2 open branch striplines are respectively connected to nodes between the adjacent 2 main branch striplines.
As a further improvement of the above technical solution, the combiner cavity phase shifter further includes a fixing medium, and the fixing medium is used for fixing the circuit substrate.
The utility model also provides a base station antenna which comprises the combiner cavity phase shifter.
The utility model has the beneficial effects that: the utility model discloses a combiner cavity phase shifter and a base station antenna, which realize light weight and miniaturization by integrating a single-frequency phase shifter and a single-frequency combiner. The utility model can combine the signals of two radiation frequency bands for transmission, thereby reducing the use amount of cables.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
Fig. 1 is a schematic diagram of an overall structure of a combiner cavity phase shifter according to an embodiment of the present invention;
fig. 2 is a schematic diagram of circuit traces disposed on a circuit substrate according to an embodiment of the utility model.
Detailed Description
Reference will now be made in detail to the present preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout.
In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, if words such as "a plurality" are described, the meaning is one or more, the meaning of a plurality is two or more, more than, less than, more than, etc. are understood as excluding the present number, and more than, less than, etc. are understood as including the present number.
In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.
Referring to fig. 1 and fig. 2, a combiner cavity phase shifter according to an embodiment of the present invention includes:
a phase shifter cavity 10 in which a first circuit board 11 and a second circuit board 21 are disposed, the first circuit board 11 and the second circuit board 21 being stacked up and down;
a first phase shift circuit 12 disposed on the first circuit substrate 11, wherein the first phase shift circuit 12 includes a first phase shift module 120 and a first power dividing module; the first phase shift module 120 is provided with a first phase shift dielectric sliding piece 13, and the first phase shift module 120 and the first phase shift dielectric sliding piece 13 slide relatively in the left-right direction to shift the phase of a first frequency band; the first power dividing module includes multiple cascaded first power dividers 121, and an output end of each first power divider 121 is sequentially connected to one port of the first phase shifting module 120;
a second phase shift circuit 22 disposed on the second circuit substrate 21, wherein the second phase shift circuit 22 includes a second phase shift module 220 and a second power dividing module; the second phase shift module 220 is provided with a second phase shift dielectric sliding piece 23, and the second phase shift module 220 and the second phase shift dielectric sliding piece 23 slide relatively in the left-right direction to shift the phase of the second frequency band; the second power dividing module includes multiple cascaded second power dividers 221, and an output end of each second power divider 221 is sequentially connected to one port of the second phase shifting module 220;
a dual-frequency combiner including a first combiner 310, a second combiner 320, a matching connection 40, and a combining output end 330; the first combiner 310 is disposed on the first circuit substrate 11, and is connected in series with the output end of the first power dividing module; the second combiner 320 is disposed on the second circuit substrate 21, and is connected in series with the output end of the second power dividing module; the first combiner 310 and the second combiner 320 are connected to a combining output end 330 through a matching connector 40, and the combining output end 330 is connected to the combining output end 330.
In this embodiment, signals of different frequency bands are integrated, and phase-shifting combined signals of the first phase-shifting circuit 12 and the second phase-shifting circuit 22 are output through an output port of the phase shifter of the combining cavity; based on the requirement that the number of the first combiner 310, the second combiner 320, and the number of the combining output ends 330 are the same, it can be understood that the number of the first power dividers 121, the number of the ports of the first phase shift module 120, the number of the second power dividers 221, and the number of the ports of the second phase shift module 220 are the same; the utility model can realize the light weight and the miniaturization of the combiner cavity phase shifter, reduce the use amount of cables and reduce the cost.
As a further improvement of the above technical solution, the combining output end 330 is disposed on the first circuit substrate 11 or the second circuit substrate 21.
As a further improvement of the above technical solution, the first circuit substrate 11 and the second circuit substrate 21 have via holes that are vertically communicated, the matching connector 40 passes through the via holes to be respectively connected to the output end of the first combiner 310 and the output end of the second combiner 320, and the output end of the matching connector 40 is connected to the combining output end 330.
As a further improvement of the above technical solution, the first power divider 121 and the second power divider 221 are both wilkinson power dividers, each wilkinson power divider includes 2 branches, each branch includes two impedance strip lines connected in series, and the length of each impedance strip line is 1/4 wavelengths.
As a further improvement of the above technical solution, the wilkinson power divider further includes an isolation resistor 340, and two ends of the isolation resistor 340 are respectively connected to nodes between the impedance strip lines connected in series in the two branches.
In the embodiment provided by the utility model, by arranging the isolation resistor 340, interference signals of the dual-frequency combiner on the first power division module and the second power division module are reduced, and the conditions of signal amplitude bending, phase shift, resonance and the like caused by too close interval of two frequency bands in the combiner cavity phase shifter are prevented.
As a further improvement of the above technical solution, one branch of the first power divider 121 is connected to the first combiner 310, and the other branch is connected to the first phase shift module 120 to form a phase-shifted signal, and then is connected to the first power divider 121 of the next stage; one branch of the second power divider 221 is connected to the second combiner 320, and the other branch is connected to the second phase shift module 220 to form a phase-shifted signal, and then connected to the second power divider 221 of the next stage.
As a further improvement of the above technical solution, the first power divider 121 of each stage has different power dividing ratios, the second power divider 221 of each stage has different power dividing ratios, and the first power divider 121 and the second power divider 221 of the same stage have the same power.
In the embodiment provided by the utility model, the combiner cavity phase shifter adopts a strip line structure, the phase of the combiner connected with each port is kept consistent, and the phase of each phase shifting network is optimized by adjusting the phase of each phase shifting network according to the directional diagram index requirements of different frequency bands when the feed network is shaped.
As a further improvement of the above technical solution, the first combiner 310 and the second combiner 320 each include 3 main branch striplines connected in series and 2 open branch striplines 350, and the 2 open branch striplines 350 are respectively connected to nodes between the adjacent 2 main branch striplines.
In the embodiment provided by the utility model, the out-of-band rejection can be realized by arranging the open-circuit branch strip line 350 at the node between the adjacent 2 main path strip lines; by laminating and coupling the first combiner 310 and the second combiner 320, the performance index of the combiner cavity phase shifter is improved, and the size of the combiner cavity phase shifter is reduced. It should be noted that the length and width of each strip line are different from each other as a result of impedance matching,
as a further improvement of the above technical solution, the combining cavity phase shifter further includes a fixing medium 50, and the fixing medium 50 is used for fixing the circuit substrate.
The working process of the utility model is explained below by taking an 700/900MHz combining cavity phase shifter as an example:
combining an 700/900MHz strip line cavity combiner with a 700/900MHz cavity phase shifter; the strip line cavity combiner has the advantages of low loss and good out-of-band rejection. Because the 700/900MHz strip line cavity combiner comprises two frequency bands of 703-798MHz and 880-960MHz, the two frequency bands are only 82MHz apart, the amplitude and the phase of the combiner cavity phase shifter are easily affected by the combiner, resulting in amplitude or phase shift, or resonance. In this embodiment, based on the principle of the wilkinson power divider, after passing through the 1/4 wavelength circuit, the current signal passes through the isolation resistor 340, and the circuit signals at the two output ports of the wilkinson power divider are isolated. The interference of the combined signal to the power dividing signal is reduced, and the amplitude or phase shift or resonance of the phase-shifted signal caused by the close frequency band interval of the first combiner 310 and the second combiner 320 is prevented.
Because the phase of the combiner connected with the port of each phase shifting module is kept consistent, the phase of each phase shifting module is optimized by adjusting the phase of each phase shifting module according to the directional diagram index requirements of different frequency bands when the feed network is shaped. The out-of-band rejection improvement indexes are carried out by utilizing the two sections of open-circuit branches, and the size of the combiner cavity phase shifter is reduced by adopting a mutual coupling and superposition mode.
In some embodiments of the present invention, antennas using the above combining cavity phase shifters are also provided.
While the present invention has been described in considerable detail and with particular reference to a few illustrative embodiments thereof, it is not intended to be limited to any such details or embodiments or any particular embodiments, but rather it is to be construed that the utility model effectively covers the intended scope of the utility model by virtue of the prior art providing a broad interpretation of such claims in view of the appended claims. Those of ordinary skill in the art will understand that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the utility model, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. A combiner cavity phase shifter is characterized by comprising:
the phase shifter comprises a phase shifter cavity, a phase shifter and a phase shifter, wherein a first circuit substrate and a second circuit substrate are arranged in the phase shifter cavity, and the first circuit substrate and the second circuit substrate are vertically stacked;
the first phase shift circuit is arranged on the first circuit substrate and comprises a first phase shift module and a first power division module; the first phase shifting module is provided with a first phase shifting medium sliding sheet, and the first phase shifting module and the first phase shifting medium sliding sheet relatively slide along the left-right direction to shift the phase of a first frequency band; the first power division module comprises a plurality of paths of cascaded first power dividers, and the output end of each path of first power divider is sequentially connected with one port of the first phase shifting module;
the second phase shift circuit is arranged on the second circuit substrate and comprises a second phase shift module and a second power division module; a second phase-shifting dielectric sliding sheet is arranged on the second phase-shifting module, and the second phase-shifting module and the second phase-shifting dielectric sliding sheet relatively slide along the left-right direction to shift the phase of a second frequency band; the second power division module comprises a plurality of paths of cascaded second power dividers, and the output end of each path of second power divider is sequentially connected with one port of the second phase shifting module;
the dual-frequency combiner comprises a first combiner, a second combiner, a matching connecting piece and a combiner output end; the first combiner is arranged on the first circuit substrate and is connected with the output end of the first power dividing module in series; the second combiner is arranged on the second circuit substrate and is connected with the output end of the second power dividing module in series; the first combiner and the second combiner are connected with the combiner output end through a matching connecting piece.
2. The combiner cavity phase shifter of claim 1, wherein the combiner output is disposed on the first circuit substrate or the second circuit substrate.
3. The combiner cavity phase shifter of claim 2, wherein the first circuit substrate and the second circuit substrate have via holes that are vertically connected, the matching connector passes through the via holes to connect the output end of the first combiner and the output end of the second combiner, respectively, and the output end of the matching connector is connected to the combiner output end.
4. The combiner cavity phase shifter of claim 1, wherein the first and second power dividers are Wilkinson power dividers, each comprising 2 branches, each branch comprising two impedance striplines connected in series, each impedance stripline being 1/4 in length.
5. The combiner cavity phase shifter of claim 4, wherein the Wilkinson power divider further comprises an isolation resistor, and two ends of the isolation resistor are respectively connected to nodes between the impedance striplines connected in series in the two branches.
6. The combiner cavity phase shifter according to claim 5, wherein one branch of the first power divider is connected to the first combiner, and the other branch of the first power divider is connected to the first phase shifting module to form a phase-shifted signal, and then is connected to the first power divider of the next stage; one branch of the second power divider is connected with the second combiner, and the other branch of the second power divider is connected with the second phase shifting module to form a phase-shifted signal and then is connected with the second power divider of the next stage.
7. The combiner cavity phase shifter of claim 6, wherein the first power divider of each stage has a different power dividing ratio, the second power divider of each stage has a different power dividing ratio, and the first power divider and the second power divider of the same stage have the same power.
8. The combiner cavity phase shifter of claim 7, wherein the first combiner and the second combiner each comprise 3 main branch striplines connected in series and 2 open branch striplines, and the 2 open branch striplines are respectively connected to nodes between the 2 adjacent main branch striplines.
9. The combining cavity phase shifter of claim 1, further comprising a fixing medium for fixing the circuit substrate.
10. A base station antenna comprising the combining cavity phase shifter of any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121264307.4U CN215816326U (en) | 2021-06-04 | 2021-06-04 | Combiner cavity phase shifter and base station antenna |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121264307.4U CN215816326U (en) | 2021-06-04 | 2021-06-04 | Combiner cavity phase shifter and base station antenna |
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| Publication Number | Publication Date |
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| CN215816326U true CN215816326U (en) | 2022-02-11 |
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| CN202121264307.4U Active CN215816326U (en) | 2021-06-04 | 2021-06-04 | Combiner cavity phase shifter and base station antenna |
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- 2021-06-04 CN CN202121264307.4U patent/CN215816326U/en active Active
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