CN218849753U - Multi-frequency combiner and base station antenna - Google Patents
Multi-frequency combiner and base station antenna Download PDFInfo
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- CN218849753U CN218849753U CN202222854818.2U CN202222854818U CN218849753U CN 218849753 U CN218849753 U CN 218849753U CN 202222854818 U CN202222854818 U CN 202222854818U CN 218849753 U CN218849753 U CN 218849753U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
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Abstract
The utility model relates to the technical field of communication devices, in particular to a multi-frequency combiner and a base station antenna, wherein the multi-frequency combiner comprises a dielectric substrate, the lower surface of the dielectric substrate is a copper-clad layer, and the upper surface of the dielectric substrate is provided with a combining circuit and a plurality of filter circuits; the filter circuit comprises a branch transmission line and a branch circuit loaded on the branch transmission line; the combiner circuit is respectively connected with the branch transmission line in each filter circuit; wherein at least one filter circuit adopts a short-circuit branch as a branch circuit; the tail end of the short-circuit branch passes through the dielectric substrate and is welded with the copper-clad layer; the embodiment of the utility model provides a can improve the combiner bandwidth and reduce the combiner size.
Description
Technical Field
The utility model belongs to the technical field of the communication device technique and specifically relates to a multifrequency combiner and base station antenna.
Background
The existing PCB combiner mainly sets band-pass and suppression target values, and generally has large design size, and is difficult to meet the requirement of multi-frequency combining, particularly the requirement of combining ultra-wide bandwidth.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a multifrequency combiner and base station antenna aims at improving the combiner bandwidth, and reduces the combiner size.
In a first aspect, a multi-frequency combiner is provided, including:
the lower surface of the dielectric substrate is a copper-clad layer, and the upper surface of the dielectric substrate is provided with a combiner circuit and a plurality of filter circuits;
the filter circuit comprises a branch transmission line and a branch circuit loaded on the branch transmission line;
the combiner circuit is respectively connected with the branch transmission line in each filter circuit;
wherein at least one filter circuit adopts a short-circuit branch as a branch circuit; and the tail end of the short-circuit branch passes through the dielectric substrate and is welded with the copper-clad layer.
In some embodiments, the height of the stub circuit is in a range of 1/4 of the wavelength range corresponding to the passband frequency range.
In some embodiments, the passband frequency range of a filter circuit that employs short-circuited stubs as stub circuits is large.
In some embodiments, the remaining ones of the plurality of filter circuits employ open stubs as stub circuits.
In some embodiments, the combining circuit includes a main transmission line and a combining port, one end of the main transmission line is connected to the combining port, and the other end of the main transmission line is connected to the branch transmission lines of the plurality of filter circuits, respectively.
In some embodiments, the filter circuit further comprises an independent port, and the other end of the branch transmission line is connected to the independent port of the filter circuit.
In some embodiments, the branch transmission line is loaded with 3 branch circuits.
In some embodiments, the branch transmission line and the main transmission line both adopt microstrip lines.
In some embodiments, the stub circuits loaded on the branch transmission line are located on the same side of the branch transmission line.
In a second aspect, a base station antenna is provided, which includes the multi-frequency combiner of any one of the first aspect.
The utility model has the advantages that: the short-circuit branches are introduced to serve as branch circuits of the filter circuit, so that the size of at least one filter circuit can be reduced, and the filter circuit with higher frequency is combined under the condition that the interval of the multi-frequency combiner is limited; finally, the multi-frequency combiner combines the ultra-wide bandwidth and obtains a relatively small size.
Drawings
Fig. 1 is a schematic diagram of an overall structure of a multi-frequency combiner according to an embodiment.
Fig. 2 is a front view of a multi-frequency combiner according to an embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the present invention will be further described with reference to the following embodiments and accompanying drawings.
In the description of the present invention, a plurality of terms means an indefinite amount, and a plurality of terms means two or more, and the terms larger than, smaller than, larger than, or the like are understood as not including the term, and the terms larger than, smaller than, or the like are understood as including the term. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood 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, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, which may include other elements not expressly listed, in addition to those listed.
First, several terms referred to in the present application are resolved:
the combiner is used for combining two or more paths of radio frequency signals sent from different transmitters into one path and sending the path to a radio frequency device for antenna transmission, and meanwhile, mutual influence among signals of all ports is avoided. A combiner typically has two or more input ports and only one output port. The combiner consists of a cavity resonator and a circulator, wherein the cavity resonator is a high-Q-value and low-insertion-loss band-pass filter. The main indexes of the combiner are as follows: bandwidth, standing wave, port isolation, insertion loss.
The design requirement of the broadband, namely the working frequency band range of the combiner, is higher than that of the narrow band; the filter transmission band (filter transmission band) is a frequency range through which the filter allows the signal to pass, and when the signal passes through the filter, the frequency band with the minimum attenuation, i.e., the frequency range through which the filter allows the signal to pass.
Standing waves are indexes of matching degree of the combiner, different requirements can be met according to different bandwidths, the reference value of basic standing waves is less than 1.5, isolation mainly refers to isolation between channels and between an output port and an input port, and the reference value is less than or equal to minus 30dB;
the port isolation is used for describing the capability of two paths of signals without mutual influence and is generally required to be more than 20 dB;
insertion loss, which is the loss of a signal between a transmitter and a receiver caused by the insertion of a cable or element, is commonly referred to as attenuation.
In the related art in the field of mobile communication, in order to avoid intermodulation interference caused by radio frequency coupling between different channels, and considering factors of economy, technology and construction site, a combiner is generally used at a base station end to share communication channels of multiple antennas.
At present, there are two types of combiners commonly used for base station antennas: PCB microstrip line combiner and cavity combiner. The existing PCB combiner mainly sets band-pass and suppression target values, and generally has large design size, and is difficult to meet the requirement of multi-frequency combining, particularly the requirement of combining ultra-wide bandwidth.
Based on this, the utility model provides a multifrequency combiner and base station antenna, through introducing the short circuit minor matters as filter circuit's minor matters circuit, can reduce at least one filter circuit's size to under the condition that the interval of multifrequency combiner is restricted, combine the filter circuit of higher frequency; finally, the multi-frequency combiner combines the ultra-wide bandwidth and obtains a relatively small size.
As shown in fig. 1 and 2, according to a first aspect of the present invention, a multi-frequency combiner is provided.
The multi-frequency combiner comprises a dielectric substrate 100, wherein the lower surface of the dielectric substrate 100 is a copper-clad layer, and a combiner circuit 200 and a plurality of filter circuits 300 are arranged on the upper surface of the dielectric substrate 100;
the filter circuit 300 comprises a branch transmission line 310 and a stub circuit loaded on the branch transmission line 310;
the combining circuit 200 is respectively connected to the branch transmission lines 310 of each of the filter circuits 300;
wherein at least one of the filter circuits 300 employs the short-circuit stub 410 as a stub circuit; the end of the short circuit branch 410 passes through the dielectric substrate 100 and is welded with the copper clad layer.
It should be noted that, in the embodiment provided by the present invention, the filter circuit 300 is a circuit that only allows the signal components within the passband frequency range to pass normally, and suppresses the signals outside the passband frequency range; the filter circuit 300 includes a branch transmission line 310, the branch circuits are loaded on the branch transmission line 310, the number of the branch circuits may be one or several, and the branch circuits may be connected at a certain position on the path of the branch transmission line 310, so as to be loaded on the branch transmission line 310, if the number of the branch circuits is several, the branch circuits are sequentially loaded on the branch transmission line 310. The branch circuit is loaded on the branch transmission line 310, so that a filtering effect is achieved.
In this embodiment, since the short-circuit branch 410 has a smaller size, the area of the dielectric substrate 100 occupied by the filter circuit 300 can be reduced, thereby reducing the size of the dielectric substrate 100; it can be understood that the more the filter circuits 300 that use the short-circuit branches 410, the larger the space saved, and the smaller the size of the multi-frequency combiner; by introducing the short-circuit branches 410 as the branch circuits of the filter circuit 300, the size of at least one filter circuit 300 can be reduced, so that the filter circuit 300 with higher frequency can be combined under the condition that the interval of the multi-frequency combiner is limited; finally, the multi-frequency combiner combines the ultra-wide bandwidth and obtains a relatively small size.
In some embodiments, the height of the stub circuit is in a range of 1/4 of the wavelength range corresponding to the passband frequency range.
It should be noted that after the filter circuit 300 corresponding to the short-circuit stub 410 is determined, a wavelength range corresponding to a passband frequency range of the filter circuit 300 can be determined, and after the wavelength range is determined, 1/4 of an endpoint value is taken as a value range of the height of the short-circuit stub 410.
In some embodiments, the passband frequency range of the filter circuit 300 using the shorting stub 410 as the stub circuit is large.
The filter circuit 300 having a large passband frequency range is the filter circuit 300 remaining after removing the filter circuit 300 having the smallest passband frequency range from all the filter circuits 300. Because the height of the stub circuit is higher due to the larger passband frequency range, the height of more stub circuits can be reduced by adopting the short-circuit stub 410 as the stub circuit for the filter circuit 300 with the larger passband frequency range; thereby enabling more effective reduction in size of the multi-frequency combiner.
In some embodiments, the remaining filter circuits 300 of the plurality of filter circuits 300 employ open stubs 420 as stub circuits.
It should be noted that, in some embodiments provided by the present invention, all the branch circuits of the filter circuit 300 adopt the short-circuit branch 410; in other embodiments provided by the present invention, if the short circuit branch 410 is used as the branch circuit of part of the filter circuit 300, the open circuit branch 420 is used as the branch circuit of the filter circuit 300 remaining after the short circuit branch 410 is used as the branch circuit; the remaining filter circuit 300 adopts the open-circuit branch 420 as the branch circuit, so that the manufacturing process can be reduced and the production efficiency can be improved on the premise of meeting the size requirement of the multi-frequency combiner.
In some embodiments, the combining circuit 200 includes a main transmission line 210 and a combining port 220, one end of the main transmission line 210 is connected to the combining port 220, and the other end is connected to the branch transmission lines 310 of the plurality of filter circuits 300, respectively.
It should be noted that, in some embodiments provided by the present invention, the main transmission line 210 is respectively connected to the branch transmission lines 310 of the plurality of filter circuits 300, so as to combine the plurality of filter circuits 300; and the combining input and output are realized through the combining port 220 of the combining circuit 200.
In some embodiments, the filter circuit 300 further includes a separate port 320, and the other end of the branch transmission line 310 is connected to the separate port 320 of the filter circuit 300.
It should be noted that, in some embodiments provided by the present invention, each filter circuit 300 includes an independent port 320, and the independent port 320 implements the input and output of each filter circuit 300.
In some embodiments, the branch transmission line 310 is loaded with 3-way stub circuits.
It should be noted that, in the embodiment provided by the present invention, each of the branch transmission lines 310 is loaded with 3 branch circuits; the pass band and stop band of the filter circuit 300 can be more effectively adjusted through the 3-path stub circuit.
In some embodiments, the branch transmission line 310 and the main transmission line 210 both use microstrip lines.
It should be noted that, in the embodiment provided in the present invention, the microstrip line is adopted as the structure of the branch transmission line 310 and the main transmission line 210, so that the size of the multi-frequency combiner can be further reduced.
In some embodiments, the stub circuits loaded on the branch transmission line 310 are located on the same side of the branch transmission line 310.
It should be noted that, in the embodiment provided by the present invention, the branch circuit is disposed on the same side of the branch transmission line 310, and the filter circuit 300 is reasonably arranged, so that the size of the filter circuit 300 can be reduced.
The present invention will be described in further detail with reference to specific examples.
Referring to fig. 2, the three-band combiner is taken as a column, and 600-1000mhz, 1710-2700mhz, and 3300-6000 frequency bands are combined to form the 600-6000 MHz combiner, and the design method is to combine filtering by adopting the open-circuit branch 420 and filtering by adopting the short-circuit branch 410, so as to build the multi-band combiner step by step.
In the aspect of the passband, the open-circuit branch 420 is adopted for 600-1000 MHz, while 1710-2700 MHz and 3300-6000 MHz are simultaneously combined by the short-circuit branch 410 and the open-circuit branch 420, so that the low loss of the passband and the high suppression of the stopband are realized.
It can be appreciated that by adjusting the width W and height H at the location of the metalized via in the shorting stub 410, the relationship between the pass band and the stop band can be effectively adjusted.
It should be noted that, in the embodiment provided by the present invention, the number of the independent ports 320 is not limited, and more or less independent ports 320 may be adopted on the premise that the space of the multi-frequency combiner allows. Meanwhile, the branch transmission line 310 and the main transmission line 210 both adopt microstrip line structures to form a microstrip line form. The printed circuit is printed on the upper surface of the dielectric substrate 100, and the back surface of the dielectric substrate 100 is a copper-clad floor, so that the grounding of the short circuit branch 410 is realized.
According to the utility model discloses a second aspect provides a base station antenna, and this base station antenna includes foretell multifrequency combiner, and the concrete structure of this multifrequency combiner refers to above-mentioned embodiment, because the utility model discloses a base station antenna has adopted the whole technical scheme of above-mentioned all embodiments, consequently has all beneficial effects that the technical scheme of above-mentioned embodiment brought at least, and the repeated description is no longer given here.
To sum up, the utility model provides a multi-frequency combiner and base station antenna, through introducing short circuit branch 410 as the branch circuit of filter circuit 300, can reduce the size of at least one filter circuit 300, thus under the condition that the interval of multi-frequency combiner is limited, combine filter circuit 300 of higher frequency; finally, the multi-frequency combiner combines the ultra-wide bandwidth and obtains a relatively small size.
The embodiment of the utility model provides an embodiment is for the more clear explanation the technical scheme of the embodiment of the utility model, do not constitute to the utility model discloses the technical scheme's that the embodiment provided is injectd, and technical staff in the field can know, along with the evolution of technique and the appearance of new application scene, the technical scheme that the embodiment of the utility model provides is applicable equally to similar technical problem.
It will be understood by those skilled in the art that the embodiments shown in the drawings are not intended as limitations on the embodiments of the invention, and that the terms "first", "second", "third", "fourth", etc. (if any) in the description and in the drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion.
It is to be understood that, in the present invention, "at least one" means one or more, "a plurality" means two or more. "and/or" for describing an association relationship of associated objects, indicating that there may be three relationships, e.g., "a and/or B" may indicate: only A, only B and both A and B are present, wherein A and B may be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. "at least one of the following" or similar expressions refer to any combination of these items, including any combination of the singular or plural items. For example, at least one (one) of a, b, or c, may represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", wherein a, b, c may be single or plural.
The above description of the preferred embodiments of the present invention is made with reference to the accompanying drawings, and not intended to limit the scope of the embodiments of the present invention. Any modifications, equivalents and improvements which may occur to those skilled in the art without departing from the scope and spirit of the embodiments of the present invention are intended to be within the scope of the claims of the embodiments of the present invention.
Claims (10)
1. A multi-frequency combiner, comprising:
the lower surface of the dielectric substrate is a copper-clad layer, and the upper surface of the dielectric substrate is provided with a combiner circuit and a plurality of filter circuits;
the filter circuit comprises a branch transmission line and a branch circuit loaded on the branch transmission line;
the combiner circuit is respectively connected with the branch transmission line in each filter circuit;
wherein at least one filter circuit adopts a short-circuit branch as a branch circuit; and the tail end of the short-circuit branch passes through the dielectric substrate and is welded with the copper-clad layer.
2. The multi-frequency combiner of claim 1, wherein a height of the stub circuit ranges from 1/4 of a wavelength range corresponding to a passband frequency range of the filter circuit.
3. The multi-frequency combiner of claim 2, wherein a passband frequency range of a filter circuit using the short-circuited stub as the stub circuit is larger.
4. The multi-frequency combiner of claim 1, wherein remaining ones of the plurality of filter circuits employ open-circuited stubs as stubs.
5. The multi-frequency combiner of claim 4, wherein the combining circuit comprises a main transmission line and a combining port, one end of the main transmission line is connected to the combining port, and the other end is connected to the branch transmission lines of the plurality of filter circuits, respectively.
6. The multi-frequency combiner of claim 1, wherein the filter circuit further comprises an independent port, and the other end of the branch transmission line is connected to the independent port of the filter circuit.
7. The multi-frequency combiner of claim 5, wherein the branch transmission lines are loaded with 3 branch circuits.
8. The multi-frequency combiner of claim 7, wherein the branch transmission lines and the main transmission line both employ microstrip lines.
9. The multi-frequency combiner of claim 7, wherein the stub circuits loaded on the branch transmission lines are located on a same side of the branch transmission lines.
10. A base station antenna comprising the multi-frequency combiner of any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222854818.2U CN218849753U (en) | 2022-10-27 | 2022-10-27 | Multi-frequency combiner and base station antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222854818.2U CN218849753U (en) | 2022-10-27 | 2022-10-27 | Multi-frequency combiner and base station antenna |
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| Publication Number | Publication Date |
|---|---|
| CN218849753U true CN218849753U (en) | 2023-04-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202222854818.2U Active CN218849753U (en) | 2022-10-27 | 2022-10-27 | Multi-frequency combiner and base station antenna |
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| CN (1) | CN218849753U (en) |
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- 2022-10-27 CN CN202222854818.2U patent/CN218849753U/en active Active
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