CN102683854A - Antenna and method for adjusting isolation of antenna ports - Google Patents
Antenna and method for adjusting isolation of antenna ports Download PDFInfo
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- CN102683854A CN102683854A CN2012101330601A CN201210133060A CN102683854A CN 102683854 A CN102683854 A CN 102683854A CN 2012101330601 A CN2012101330601 A CN 2012101330601A CN 201210133060 A CN201210133060 A CN 201210133060A CN 102683854 A CN102683854 A CN 102683854A
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Abstract
An embodiment of the invention provides an antenna and a method for adjusting isolation of antenna ports, relates to the technical field of communication and is used for improving isolation of the antenna ports. The antenna comprises at least four antenna array units, a multichannel feed unit and an isolation adjusting unit, wherein the isolation adjusting unit is positioned between the multichannel feed unit and the antenna array unit and comprises at least four channels and at least one coupling subunit. One end of each channel is connected with an output end of the multichannel feed unit, the other end of each channel is connected with one antenna array unit, the coupling subunits are positioned on at least two channels of the isolation adjusting unit and connected to at least two channels, and accordingly, signals in the at least two channels are coupled with each other.
Description
Technical field
The present invention relates to communication technical field, relate in particular to a kind of antenna and antenna port isolation control method.
Background technology
Along with the development of mobile communication, the user has proposed increasingly high requirement to capacity of communication system, how in limited frequency spectrum resources; The lifting capacity; Become pendulum Focal Point of Common Attention in the communications industry, now the industry primary study comprise following several method: one, through MIMO (Multiple-Input Multiple-Output, multiple-input and multiple-output) technology; Obtain diversity gain, effectively the elevator system capacity; Two, in the existing GSM, generally each website is 3 sector networkings, and original 3 sectors are divided into more sector, can promote the multiplexing efficient of frequency, reduces interference, also effective elevator system capacity.
No matter be to MIMO technology or multi-sector antenna; Isolation between the antenna port all will influence the performance of system; It is mainly reflected in: one, for MIMO; Interference between isolation between each antenna port and each antenna port has direct relation, and antenna port isolation difference tends to cause the interference of each antenna port stronger, and then causes the MIMO decreased performance.Two, for multi-sector antenna, antenna port isolation difference tends to cause the lifting of making an uproar of the end of receive path, even causes occurring phenomenon such as obstructions, reduction systematic function.
In the prior art, often adopt a plurality of electric bridges and a plurality of phase shifting equipment to form butler matrix, can realize the multi-beam antenna of a plurality of signal input ports and a plurality of signal output ports.Butler matrix to adopt 6 electric bridges and 4 phase changer compositions is an example, can realize the two-beam antenna of 2 signal input ports and 4 signal output ports.The inventor finds less at the lower decline angle of this type of antenna, for example under the situation of lower decline angle less than 4 degree, tends to occur the unfavorable situation of isolation of two input ports, influences systematic function.
Summary of the invention
Embodiments of the invention provide a kind of antenna and antenna port isolation control method, through introducing the isolation regulon, improve the antenna port isolation.
The embodiment of the invention provides a kind of antenna on the one hand, comprising: at least four antenna array units and multichannel feed element, and said antenna also comprises:
Isolate regulon; Between said multichannel feed element and said antenna array unit; Said isolation regulon comprises at least four passages and at least one coupling subelement; One end of said at least four passages links to each other with the output of said multichannel feed element respectively, and the other end of said at least four passages connects a said antenna array unit respectively, and said coupling subelement is positioned on two said passages of isolating regulon at least; Be used to connect said at least two passages, the signal in said at least two passages is intercoupled.
The embodiment of the invention provides a kind of antenna port isolation control method on the other hand, comprising:
Step 1: through at least four passages receive the output of multichannel feeding networks or signal that antenna array unit receives;
Step 2: the signal of at least one other passage of coupling on a said passage, said signal be used for this passage on the signal effect of the antenna array unit coupling of antenna array unit from other passages.
Antenna that embodiments of the invention provide and antenna port isolation control method; Through the isolation regulon; Can in each passage, produce the signal cancellation of coupling or weaken the signal of antenna array unit, thereby improve the isolation of antenna port from other antenna array unit couplings.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art; To do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below; Obviously, the accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
A kind of antenna structure view that Fig. 1 provides for the embodiment of the invention;
Fig. 2 a is the coupled modes structural representation sketch map of a kind of subelement that is coupled that the embodiment of the invention provides;
Fig. 2 b is the coupled modes structural representation sketch map of the another kind coupling subelement that provides of the embodiment of the invention;
Fig. 2 c be the embodiment of the invention provide another the coupling subelement coupled modes structural representation sketch map;
A kind of antenna structure view that Fig. 3 provides for further embodiment of this invention;
A kind of antenna structure view that Fig. 4 provides for yet another embodiment of the invention;
A kind of method flow sketch map of regulating the antenna port isolation that Fig. 5 provides for the embodiment of the invention;
The another kind that Fig. 6 provides for the embodiment of the invention is regulated the method flow sketch map of antenna port isolation;
Fig. 7 provide for the embodiment of the invention another regulate the method flow sketch map of antenna port isolation.
Embodiment
To combine the accompanying drawing in the embodiment of the invention below, the technical scheme in the embodiment of the invention is carried out clear, intactly description, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the present invention's protection.
A kind of antenna that the embodiment of the invention provides, as shown in Figure 1, comprising: at least four antenna array units 11, multichannel feed element 13, this antenna also comprises: isolate regulon 12.
In the embodiment of the invention; Isolate regulon and receive signal 13 outputs of multichannel feed element or that antenna array unit 11 receives through each passage; And in a passage, produce a signal from least one other passages coupling, the signal of this coupling be used for this passage on the signal effect of antenna array unit 11 couplings of antenna array unit 11 from other passages.
A kind of antenna that embodiments of the invention provide; Through between multichannel feed element and antenna array unit, increasing an isolation regulon; In at least two passages, to produce the signal coupling; The coupled signal that generates is used in the passage counteracting or weakens the signal of antenna array unit from other antenna array unit coupling, thereby improves the isolation of antenna port.
Optional in addition, the mode of at least two passages can be one or more in the following mode in the coupling subelement 121 connection isolation regulons: the direct connected mode of one-level, multistage direct connected mode, one-level coupled section mode, multistage coupled section mode or one-level coupled section add direct connected mode (promptly an end adopts to be of coupled connections and adds the direct-connected mode of the other end) and multistage coupled section adds direct connected mode; Rectangle among Fig. 2 a, 2b, the 2c is represented transmission line, and fine line representes to be between the transmission line annexation;
Wherein, The direct connected mode of one-level is shown in Fig. 2 a; Passage 2a1 and passage 2a2 two passages that subelement 121 is connected of representing to be coupled; Passage 2a1 is coupled line 2a3 with passage 2a2 and directly is connected, and multistage direct connected mode promptly adopts many coupling line 2a3 shown in Fig. 2 a to connect the mode of two passes; Rectangle is represented transmission line among the figure, and fine line representes to be between the transmission line annexation;
One-level coupled section mode is shown in Fig. 2 b; Passage 2b1 and passage 2b2 two passages that subelement 121 is connected of representing to be coupled; Coupled section 2b3 and coupled section 2b4 be coupling channel 2b1 and passage 2b2 respectively, and multistage coupled section mode promptly adopts the mode of many coupled section coupling two passes shown in Fig. 2 b; Rectangle is represented transmission line among the figure, and fine line representes to be between the transmission line annexation;
The one-level coupled section adds direct connected mode shown in Fig. 2 c; Passage 2c1 and passage 2c2 two passages that subelement 121 is connected of representing to be coupled; Coupled section 2c3 coupling channel 2c1, the direct interface channel 2c2 of coupling line 2c4, multistage coupled section adds direct connected mode and promptly adopts many coupling line 2c4 shown in Fig. 2 c to add the mode of coupled section 2c3 coupling two passes; Rectangle is represented transmission line among the figure, and fine line representes to be between the transmission line annexation.
Need to prove, when adopting two-stage or multistage connection, can above-mentioned several kinds of modes be mixed.For example, when adopting two-stage to connect, can adopt the direct connected mode of one-level to add one-level coupled section mode.
Further, optional is as shown in Figure 3, isolates regulon 12 and also comprises:
At least one pair of the first phase shift subelement 122 and the second phase shift subelement 123; The first phase shift subelement 122 and the second phase shift subelement 123 are positioned at the both sides of coupling subelement 121; And the said a pair of first phase shift subelement 122 and the second phase shift subelement 123 are positioned on the same passage through coupling subelement 121, the signal on the said passage during through the first phase shift subelement 122 and the second phase shift subelement 123 phase change opposite.
Wherein, The first phase shift subelement 122 is used for the feasible signal that imports the passage at its place into and produces a phase place; The phase place of the signal of the antenna array unit coupling on this phase place and other passages is opposite or different, and the second phase shift subelement 123 is used for making that signal phase place when importing into of the passage that spreads out of its place is consistent.
Preferably; The first phase shift subelement and the second phase shift subelement among this embodiment all are that phase place is adjustable; When promptly the signal of the first phase shift subelement and second phase shift subelement place passage was through above-mentioned Unit two, the variable quantity of signal phase can come flexible through regulating above-mentioned Unit two.
Here; Because the first phase shift subelement can be regulated the phase place that the signal of its place passage is coupled to the signal of other passages accurately; The phase place of the signal of aerial array coupling is opposite or different on signal phase after the adjusting and other passages; And then make two parts coupled signal cancel out each other or weaken, thereby improved the interport isolation of antenna.In addition, the second phase shift subelement makes the phase place of signal of passage at its place consistent when regulon 12 is isolated in input with output isolation regulon 12 to the phase place adjustment of the signal of the passage at its place, makes the antenna operate as normal.
Perhaps, the second phase shift subelement 123 is used to make the signal of channel attached antenna array unit coupling at its place to produce a phase place, and the passage at this phase place and the second phase shift subelement, 123 places is different or opposite from the phase place of the signal that other passages are coupled; The first phase shift subelement 122 be used to make its place passage from the signal of antenna array unit 11 couplings when spreading out of the passage at its place when importing into phase place consistent.
Here; Since the second phase shift subelement 123 can regulate accurately its place passage from the phase place of the signal of this channel attached antenna array unit coupling; Make the phase place of signal of this coupling opposite or different from the phase place of the signal of other passages couplings with the passage at the second phase shift subelement 123 place; And then make two parts of signals cancel out each other or weaken, thereby improved the interport isolation of antenna.In addition, the first phase shift subelement 122 be used to make its place passage from the phase place of the signal of antenna array unit coupling when spreading out of the passage at its place when importing into phase place consistent, make the antenna operate as normal.
Optional, as shown in Figure 4, a kind of antenna that the embodiment of the invention provides comprises antenna array unit 21, isolates regulon 22, multichannel feed element 23.
Wherein, Signal is from the input A and/or the B input of multichannel feed element 23; Wherein multichannel feed element 23 comprises at least two inputs; And at least two beam shape or sensing differences that the input input signal is corresponding, just to comprise that two signal input part A, B describe, embodiments of the invention are not limited to two signal input parts here; Signal gets into the mixed network subelement 231 in multichannel feed element 23 backs and mixes and be divided into two-way output signal; Here the hybrid network subelement can be butler matrix or electric bridge, when the hybrid network subelement 231 that adopts herein is 90 degree mixed electrical bridges (i.e. 90 degree hybrid modes), makes the two paths of signals of output that 90 phase differences of spending arranged; The two-way of hybrid network subelement 231 output signal is imported not five equilibrium merit molecular cell 232 and not five equilibrium merit molecular cell 233 respectively, not five equilibrium merit molecular cell 232 and not five equilibrium merit molecular cell 233 above-mentioned two paths of signals be divided into two-way respectively through power division export signal.
At this moment; Be divided into 4 road signals from the input A of multichannel feed element 23 and/or the signal of B input; Get into four passages 224,225,226,227 of multichannel feed element 23 respectively; Wherein an end of passage 224 links to each other with phase modulation subelement 234, and the other end links to each other with antenna array unit 214; What one end of passage 225 and five equilibrium merit molecular cell 233 were not told a road links to each other, and the other end links to each other with antenna array unit 213, and wherein passage 225 is successively through the first phase shift subelement 222, coupling subelement 221 and the second phase shift subelement 223; One end of passage 226 links to each other with five equilibrium merit molecular cell 232 not, and the other end links to each other with antenna array unit 212, and wherein passage 226 is through coupling subelement 221; One section of passage 227 links to each other with phase modulation subelement 235, and the other end links to each other with antenna array unit 211.
Wherein road signal energy do not told of five equilibrium merit molecular cell 232 directly outputs to antenna array unit 214 through a passage 224 of isolating regulon 22 through phase modulation subelement 234 back phase places adjustment-180 degree backs, and road signal energy do not told of five equilibrium merit molecular cell 233 directly outputs to antenna array unit 211 through another passage 227 of isolating regulon 22 through phase modulation subelement 235 back phase places adjustment-180 degree backs simultaneously; The road signal told of five equilibrium merit molecular cell 233 does not export the first phase shift subelement 222 to through passage 225; The first phase shift subelement 222 makes input signal produce an opposite or different phase of the signal with 212 couplings of aerial array subelement; Changing phase place signal afterwards is input in the coupling subelement 221; Coupling subelement 221 couples a signal to the passage 226 that is connected with aerial array subelement 212, because the amplitude of the signal of aerial array subelement 212 couplings is identical or different on the signal of this coupling and the passage 226, phase place is opposite or different; Two parts of signals is cancelled out each other or is weakened, and has improved the isolation of this antenna; Signal through overcoupling subelement 221 exports the second phase shift subelement 223 to through passage 225; The phase place of the second phase shift subelement, 223 these signals of adjustment; Make the phase place of adjusted signal consistent, and output to aerial array subelement 213 with the phase place of the signal of importing the first phase shift subelement 222 before.In addition; Another road signal of telling of five equilibrium merit molecular cell 232 does not output to coupling subelement 221 through passage 226; Export aerial array subelement 212 then to; Coupling subelement 221 is coupled to passage 225 with the signal of antenna array unit 212 place passages 226 in this process; The second phase shift subelement 223 is adjusted the phase place of the signal of 213 couplings of aerial array subelement on the passage 225; Make that the phase place of phase place and the signal of coupling subelement 221 couplings of signal of aerial array subelement 213 coupling is different or opposite and then cancel out each other or weaken, thereby also can improve the isolation of this antenna, the isolation lifting effect to antenna is best when phase place is opposite certainly.
More than in isolating two passages 225,226 of regulon 22, to have adopted one group of first phase shift subelement 222, coupling subelement 221 and the second phase shift subelement 223 to describe; The first phase shift subelement 222, coupling subelement 221 and the second phase shift subelement 223 of more groups are set in certainly also can be on other passages of isolating regulon 22 or two passages in the present embodiment; Its operation principle is identical repeating no more here, in addition here the multichannel feed element for adopting a kind of multi-beam moulding network and describing but the way of realization of multichannel feed element is not limited only to multi-beam moulding network.
A kind of method of regulating the antenna port isolation that the embodiment of the invention provides, as shown in Figure 5, may further comprise the steps:
The signals that S501, the perhaps antenna array unit of exporting through at least four passages reception multichannel feeding networks receive;
S502, on a passage signal of at least one other passage of coupling, this signal be used for this passage on the signal effect of the antenna array unit coupling of antenna array unit from other passages.
Embodiments of the invention provide a kind of method of regulating isolation between antennas, have realized the adjusting isolation between antennas through isolating coupled signal phase place different coupling signal with antenna array unit of regulon generation, thereby have improved the antenna port isolation.
A kind of method of regulating the antenna port isolation that the embodiment of the invention provides, as shown in Figure 6, may further comprise the steps:
S601, through at least four passages receive the output of multichannel feeding networks or signal that antenna array unit receives;
S602, the phase place of regulating the signal that imports a passage into make the phase place of this signal that a phase change amount φ take place;
The signal of S603, this passage that is coupled is to other passages, and wherein the signal of the coupling of the antenna array unit on other passages is different or opposite from the phase place of the signal of this passage coupling with other passages;
S604, the phase place of regulating the signal of this passage make the phase place of this signal that a phase change amount-φ take place.
A kind of method of regulating the antenna port isolation that another embodiment of the present invention provides, as shown in Figure 7, may further comprise the steps:
S701, through at least four passages receive the output of multichannel feeding networks or signal that antenna array unit receives;
S702, regulate on the passage antenna array unit from other passages on the phase place of signal of antenna array unit coupling, make the phase place of the signal of this coupling that a phase change amount φ take place;
The signal that other passages are imported in S703, coupling into is to this passage, and wherein the signal of the coupling of the antenna array unit on this passage is different or opposite from the phase place of the signal of other passage couplings with passage behind the phase change that φ takes place;
S704, the phase place of regulating the signal of this passage make the phase place of this signal that a phase change amount-φ take place.
Embodiments of the invention provide a kind of method of regulating the antenna port isolation; Signal through isolating a coupling different or opposite with the signal phase of the coupling of antenna array unit of regulon generation has been realized the adjusting isolation between antennas, thereby improves the antenna port isolation.
Further; Optional, the coupled modes of isolating regulating networks can be taked at least a in the following mode: the direct connected mode of one-level, multistage direct connected mode, one-level coupled section mode, multistage coupled section mode or one-level coupled section add direct connected mode.
Embodiments of the invention provide a kind of method of regulating isolation between antennas; Signal through isolating a coupling different or opposite with the signal phase of antenna array unit coupling of regulon generation has been realized the adjusting isolation between antennas, thereby improves the antenna port isolation.
One of ordinary skill in the art will appreciate that: all or part of step that realizes said method embodiment can be accomplished through the relevant hardware of program command; Aforesaid program can be stored in the computer read/write memory medium; This program the step that comprises said method embodiment when carrying out; And aforesaid storage medium comprises: various media that can be program code stored such as ROM, RAM, magnetic disc or CD.
The above; Be merely embodiment of the present invention, but protection scope of the present invention is not limited thereto, any technical staff who is familiar with the present technique field is in the technical scope that the present invention discloses; Can expect easily changing or replacement, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of said claim.
Claims (8)
1. antenna comprises: at least four antenna array units and multichannel feed element is characterized in that said antenna also comprises:
Isolate regulon; Between said multichannel feed element and said antenna array unit; Said isolation regulon comprises at least four passages and at least one coupling subelement; One end of said at least four passages links to each other with the output of said multichannel feed element respectively, and the other end of said at least four passages connects a said antenna array unit respectively, and said coupling subelement is positioned on two said passages of isolating regulon at least; Be used to connect said at least two passages, the signal in said at least two passages is intercoupled.
2. antenna according to claim 1 is characterized in that, said isolation regulon also comprises:
At least one pair of the first phase shift subelement and the second phase shift subelement; Said first phase shift subelement and the said second phase shift subelement are positioned at said coupling subelement both sides; And a pair of said first phase shift subelement and the said second phase shift subelement are positioned on the same passage through said coupling subelement, the signal on the said passage during through the first phase shift subelement and the second phase shift subelement phase change opposite;
Wherein, the said first phase shift subelement is used for making the signal of the passage import its place into to produce a phase place, and said phase place is opposite or different with the phase place of the signal that antenna array unit on said other passages is coupled; The said second phase shift subelement is used for making that signal phase place when importing into of the passage spread out of its place is consistent;
Perhaps, the said second phase shift subelement is used to make the signal of the antenna array unit coupling on the passage at its place to produce a phase place, and the passage at said phase place and said second phase shift subelement place is different or opposite from the phase place of the signal that other passages are coupled; The said first phase shift subelement be used to make its place passage from the signal of said antenna array unit coupling when spreading out of the passage at its place when importing into phase place consistent.
3. antenna according to claim 2 is characterized in that, the said first phase shift subelement and the second phase shift subelement all are that phase place is adjustable.
4. according to the arbitrary described antenna of claim 1 to 3, it is characterized in that the mode that said coupling subelement connects at least two passages in the said isolation regulon comprises at least a in the following mode:
The direct connected mode of one-level, multistage direct connected mode, one-level coupled section mode, multistage coupled section mode, the one-level coupled section adds direct connected mode or multistage coupled section adds direct connected mode.
5. an antenna port isolation control method is characterized in that, comprising:
Step 1: receive the signal output of multichannel feeding network or that antenna array unit receives through at least four passages;
Step 2: the signal of at least one other passage of coupling on a said passage, said signal be used for this passage on the signal effect of the antenna array unit coupling of antenna array unit from other passages.
6. antenna port isolation control method according to claim 5 is characterized in that said step 2 specifically comprises:
The phase place of the signal of a passage is imported in adjusting into, makes the phase place of said signal that a phase change amount φ take place;
Be coupled the signal of this passage to other passages, and the signal of the antenna array unit coupling on wherein said other passages and said other passages are different or opposite from the phase place of the signal that said passage is coupled;
Regulate the phase place of the signal of said passage, make the phase place of said signal that a phase change amount-φ take place.
7. antenna port isolation control method according to claim 5 is characterized in that said step 2 specifically comprises:
Regulate on the passage antenna array unit from other passages on the phase place of signal of antenna array unit coupling, make the phase place of the signal of said coupling that a phase change amount φ take place;
Signal to the said passage of said other passages is imported in coupling into, and the signal of the antenna array unit coupling on the wherein said passage is different or opposite from the phase place of the signal of said other passage couplings with said passage behind the phase change that said φ takes place;
Regulate the phase place of the signal of said passage, make the phase place of said signal that a phase change amount-φ take place.
8. according to any described method of claim 5 to 7, it is characterized in that the mode of signal to other passages of the said passage of said coupling comprises at least a in the following mode:
The direct connected mode of one-level, multistage direct connected mode, one-level coupled section mode, multistage coupled section mode or the one-level coupled section adds direct connected mode and multistage coupled section adds direct connected mode.
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| CN201210133060.1A CN102683854B (en) | 2012-04-28 | 2012-04-28 | A kind of antenna and antenna port isolation control method |
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| CN201210133060.1A CN102683854B (en) | 2012-04-28 | 2012-04-28 | A kind of antenna and antenna port isolation control method |
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| CN107317110A (en) * | 2017-08-08 | 2017-11-03 | 深圳国人通信股份有限公司 | A kind of feed structure for lifting mimo antenna isolation |
| CN108172998A (en) * | 2017-12-21 | 2018-06-15 | 四川中测微格科技有限公司 | A kind of structure for improving Wave-packet shaping network device interface isolation |
| CN110391498A (en) * | 2019-07-17 | 2019-10-29 | 安徽蓝讯电子科技有限公司 | A method of optimization base-station antenna array isolation |
| CN110829025A (en) * | 2019-11-15 | 2020-02-21 | Oppo广东移动通信有限公司 | Antenna module, terminal and method for adjusting antenna isolation |
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| CN110829025A (en) * | 2019-11-15 | 2020-02-21 | Oppo广东移动通信有限公司 | Antenna module, terminal and method for adjusting antenna isolation |
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| Publication number | Publication date |
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| CN102683854B (en) | 2016-01-06 |
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