CN102800943A - Dual-polarized antenna and MIMO (multiple input multiple output) antenna with same - Google Patents
Dual-polarized antenna and MIMO (multiple input multiple output) antenna with same Download PDFInfo
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- CN102800943A CN102800943A CN2011101451692A CN201110145169A CN102800943A CN 102800943 A CN102800943 A CN 102800943A CN 2011101451692 A CN2011101451692 A CN 2011101451692A CN 201110145169 A CN201110145169 A CN 201110145169A CN 102800943 A CN102800943 A CN 102800943A
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Abstract
The invention relates to a dual-polarized antenna. The antenna comprises a dielectric substrate and a metal sheet adhered to one surface of the dielectric substrate, wherein a first feeder and a second feeder are arranged around the metal sheet; the first and second feeders are fed into the metal sheet by way of coupling; a first microgroove structure and a second microgroove structure, which are unsymmetrical, are hollowed on the metal sheet to form a metal route on the metal sheet; and space for electronic elements to embed is preset on the antenna. The antenna meeting the requirements of adaptability and universality is designed by arranging the space for electronic elements to embed on the antenna and changing the performances of the embedded electronic elements to finely adjust the performances of the antenna. Besides, the invention also relates to an MIMO (multiple input multiple output) antenna with a plurality of the dual-polarized antennas.
Description
Technical field
The invention belongs to the communications field, particularly, relate to a kind of dual polarized antenna and have the MIMO antenna of this dual polarized antenna.
Background technology
Dual polarized antenna is a kind of new antenna technology; Traditional dual polarized antenna be through made up+45 ° with the mutually orthogonal antenna of-45 ° of two consequent pole direction and be operated in simultaneously under the transmission duplex pattern, so its most outstanding advantage is to save the antenna amount of single directional base station; The directional base station (three sectors) of general GSM digital mobile communication network will use 9 antennas, and 3 antennas of each fan-shaped use (space diversity, one two receipts) are if use dual polarized antenna, 1 antenna of each fan-shaped needs; Simultaneously because in dual polarized antenna, ± 45 ° polarization orthogonal property can guarantee+isolation between 45 ° and-45 ° of two slave antennas satisfy intermodulation to the requirement of isolation between antennas (>=30dB), so the space interval between the dual polarized antenna only needs 20-30cm; In addition, dual polarized antenna has the advantage of electrical tilt antenna, in mobile radio communication, uses dual polarized antenna the same with electrical tilt antenna, can reduce call loss, reduces to disturb, and improves the service quality of the whole network.If use dual polarized antenna; Because dual polarized antenna is not high to setting up installation requirement, need not take over the land for use and build tower, only needs the iron prop of a diameter 20cm of frame; Dual polarized antenna is fixed on the iron prop by corresponding coverage direction gets final product; Thereby the saving capital expenditure makes station layout more reasonable simultaneously, and the selected of site, base station is more prone to.
There are bigger otherness in environment that antenna is worked in Different products and electromagnetic property, will cause antenna performance in design and use, to have bigger difference, so the antenna that requires to design must have stronger adaptability and versatility.In sum, original technique in use will run into the problem of versatility and the poor performance opposite sex.
Summary of the invention
The technical problem that the present invention will solve is; To antenna operational environment and the bigger otherness of electromagnetic property existence in different product; Cause antenna performance in design and use, to have bigger difference, a kind of dual polarized antenna is provided, this antenna has stronger adaptability and versatility.
The present invention solves the problems of the technologies described above the technical scheme that is adopted: a kind of dual polarized antenna; Said antenna comprises medium substrate, attached to the sheet metal on medium substrate one surface; Be provided with first feeder line, second feeder line around sheet metal; Said first feeder line and second feeder line are all through the said sheet metal of coupled modes feed-in; Hollow out has asymmetrical first micro groove structure and second micro groove structure on sheet metal, to form metal routing on the said sheet metal, and said antenna is preset with the space that electronic component embeds.
Further, said space be arranged between first feeder line, second feeder line, first feeder line and the sheet metal, between second feeder line and the sheet metal and these five positions of sheet metal at least one on.
Further, said space is arranged on the metal routing on the sheet metal, and perhaps said space is arranged on first micro groove structure and/or second micro groove structure.
Further, said electronic component is perceptual electronic component, capacitive electronic component or resistance.
Further, said space is the pad that is formed on the said antenna.
Further, the scope of said perceptual electronic component inductance value is between 0-5uH.
Further, the scope of said capacitive electronic component capacitance is between 0-2pF.
Further, said first micro groove structure be a kind of in complementary split ring resonator structure, complementary helix structure, opening helical ring structure, two opening helical ring structure and the complementary folding line structure or through several kinds of structures in front derive, compound or a micro groove structure that the group battle array obtains.
Further, said second micro groove structure be a kind of in complementary split ring resonator structure, complementary helix structure, opening helical ring structure, two opening helical ring structure and the complementary folding line structure or through several kinds of structures in front derive, compound or a micro groove structure that the group battle array obtains.
The dual polarized antenna of embodiment of the present invention; With respect to existing antenna; Has following beneficial effect: through the space that electronic component embeds is set on antenna; Can finely tune the performance of antenna through the performance that changes the electronic component that embeds, design the antenna of the requirement of satisfying adaptability and versatility.In addition, hollow out has asymmetrical first micro groove structure and second micro groove structure on sheet metal, therefore can produce a plurality of resonance points at an easy rate, and the difficult counteracting of resonance point, is easy to realize multimode resonance, realizes the multimodeization of antenna easily.
Another problem to be solved by this invention provides a kind of MIMO antenna.
The present invention solves the problems of the technologies described above the scheme that is adopted: a kind of MIMO antenna, said MIMO antenna comprises a plurality of above-mentioned dual polarized antennas.
According to MIMO antenna of the present invention, except the characteristics that possess above-mentioned dual polarized antenna itself, also have very high isolation, the antijamming capability between a plurality of antennas is strong.
Description of drawings
Fig. 1 is the stereogram of antenna first embodiment of the present invention;
Fig. 2 is another visual angle figure of Fig. 1;
The structural representation of Fig. 3 antenna second embodiment of the present invention;
The structural representation of Fig. 4 antenna the 3rd embodiment of the present invention.
Fig. 5 a is the sketch map of complementary split ring resonator structure;
Fig. 5 b is depicted as the sketch map of complementary helix structure;
Fig. 5 c is depicted as the sketch map of opening helical ring structure;
Fig. 5 d is depicted as the sketch map of two opening helical ring structures;
Fig. 5 e is depicted as the sketch map of complementary folding line structure;
Fig. 6 a is the sketch map of deriving of complementary its geometry of split ring resonator structure shown in Fig. 5 a;
Fig. 6 b is the sketch map of deriving of complementary its expansion of split ring resonator structure shown in Fig. 5 a;
Fig. 7 a is the structural representation behind the complementary split ring resonator structure shown in three Fig. 5 a compound;
Fig. 7 b is the compound sketch map that the complementary split ring resonator structure shown in two Fig. 5 a and Fig. 5 b are depicted as complementary helix structure;
Fig. 8 is the structural representation after the complementary split ring resonator structural group battle array shown in four Fig. 5 a.
Embodiment
Like Fig. 1 and shown in Figure 2; Said dual polarized antenna of the present invention comprises medium substrate 1, attached to the sheet metal 4 on medium substrate 1 one surface; Be provided with first feeder line 2, second feeder line 3 around sheet metal 4; Said first feeder line 2 and second feeder line 3 are all through the said sheet metal 4 of coupled modes feed-in, and hollow out has asymmetrical first micro groove structure 41 and second micro groove structure 42 on sheet metal, to form metal routing 43 on the said sheet metal 4, and said antenna 100 is preset with the space 6 that electronic component embeds.
Among Fig. 1 to Fig. 4, the part of sheet metal cross-hatching is a metal routing, the blank parts on the sheet metal (part of hollow out) expression first micro groove structure and second micro groove structure.In addition, first feeder line and second feeder line are also represented with hatching.
Shown in Figure 1 is the stereogram of dual polarized antenna of the present invention, and Fig. 2 is its another visual angle figure.Comprehensive two figure can find out that a surface attachment of medium substrate has first feeder line, second feeder line and sheet metal, does not adhere to other structure on the b surface.Certainly, according to different needs, also can there be other structure on the b surface.
Said first micro groove structure 41 among the present invention, second micro groove structure 42 can be the complementary helix structures shown in the complementary split ring resonator structure shown in Fig. 5 a, Fig. 5 b, a kind of in the two opening helical ring structures shown in the opening helical ring structure shown in Fig. 5 c, Fig. 5 d, the complementary folding line structure shown in Fig. 5 e or through several kinds of structures in front derive, compound or a micro groove structure that the group battle array obtains.Derive and be divided into two kinds; A kind of is that geometry is derived; Another kind is that expansion is derived, and the geometry is here derived and is meant that function class derives like, variform structure, is for example derived to class of a curve structure, triangle class formation and other different polygon class formation by the square frame class formation; The expansion is here derived and promptly on the basis of Fig. 5 a to Fig. 5 e, is offered new groove to form new micro groove structure; Complementary split ring resonator structure with shown in Fig. 5 a is an example, and Fig. 6 a is its geometry sketch map of deriving, and Fig. 6 b is its geometry sketch map of deriving.Compound being meant here, a plurality of stacks of the micro groove structure of Fig. 5 a to Fig. 5 e form a new micro groove structure, shown in Fig. 7 a, are the structural representation of the complementary split ring resonator structure shown in three Fig. 5 a after compound; Shown in Fig. 7 b, be that the complementary split ring resonator structure shown in two Fig. 5 a and Fig. 5 b are depicted as the common structural representation after compound of complementary helix structure.The group battle array here is meant the micro groove structure that is formed an integral body by the micro groove structure array on same sheet metal shown in a plurality of Fig. 5 a to Fig. 5 e, and is as shown in Figure 8, is the structural representation after a plurality of complementary split ring resonator structural group battle arrays shown in Fig. 5 a.
We know, can obtain the antenna of different polarization modes through the feed placement that changes feeder line, therefore, among the present invention, can obtain dual polarized antenna through the difference that changes first feeder line, the second feeder line feed placement.Preferably, the feeding classification of first feeder line is a horizontal polarization, and the feeding classification of second feeder line is a perpendicular polarization, and every kind of polarization mode can realize following function according to different needs, for example, following several kinds of situation is arranged:
(1) a kind of polarization mode in horizontal polarization and the perpendicular polarization only is used to receive electromagnetic wave, and another kind of polarization mode is used for launching electromagnetic wave.
(2) a kind of polarization mode in horizontal polarization and the perpendicular polarization only is used to receive electromagnetic wave, and another kind of polarization mode is used to transmit and receive electromagnetic wave.
(3) two kinds of polarization modes in horizontal polarization and the perpendicular polarization all are used to transmit and receive electromagnetic wave.
Among the present invention, said space 6 is arranged between first feeder line 2, second feeder line 3, first feeder line 2 and the sheet metal 4, between second feeder line 3 and the sheet metal 4 and sheet metal 4 these five positions at least one on.Preferably; A plurality of spaces 6 being provided with on antenna is as shown in Figure 1; That is, on a of medium substrate face, between first feeder line 2, second feeder line 3, first feeder line 2 and the sheet metal 4, between second feeder line 3 and the sheet metal 4 and the space 6 that electronic component embeds all is set on sheet metal 4 these five positions.Wherein, Space on the sheet metal 4 comprises the space that is arranged on the metal routing 43; And be arranged on the space 6 on first micro groove structure 41 and second micro groove structure 42, and be arranged on metal routing 43 edges that space 6 on first micro groove structure 41 and second micro groove structure 42 connects both sides respectively.
The reserved location in space is not limited to above-mentioned several kinds of forms on the dual polarized antenna 100 of the present invention, as long as the space is arranged on the dual polarized antenna.For example, the space can also be arranged on the medium substrate.
Said electronic component of the present invention is perceptual electronic component, capacitive electronic component or resistance.After in the headspace of antenna, adding this type of electronic component, can improve the various performances of antenna.And, can realize the adjustable of antenna performance parameters through adding the electronic component of different parameters.Add electronic component in the space following several kinds of situations can be arranged:
(1) in the space of first feeder line, second feeder line, adds perceptual electronic component; Using formula: f=1/
can know square being inversely proportional to of size and operating frequency of inductance value; So, can realize through suitable embedding inductance or perceptual electronic component when the operating frequency that needs is when hanging down operating frequency.The inductance value range of the perceptual electronic component that adds is preferably between the 0-5uH, because, thereby if the too big alternating signal of inductance value will be had influence on the radiation efficiency of antenna by perceptual electronic component consumption.Certainly also possibly in the space on first feeder line, second feeder line, add resistance to improve the radiation resistance of antenna.Certainly, also a plurality of spaces can be set on first feeder line and second feeder line, segment space embedded resistor wherein, segment space embeds perceptual electronic component, has both realized the adjusting of operating frequency, can improve the radiation resistance of antenna again.Certainly according to other needs, also can only in segment space, add electronic component, the lead short circuit is used in other space.
(2) embed the capacitive electronic component in the space between first feeder line 2 and sheet metal 4, between second feeder line 3 and the sheet metal 4.Here regulate first feeder line 2, second feeder line 3 and be coupled through embedding the capacitive electronic component with signal between the sheet metal 4; Using formula:
can know square being inversely proportional to of size and operating frequency of capacitance; So when the operating frequency that needs is when hanging down operating frequency, can realize through suitable embedding capacitive electronic component.The capacitance scope of the capacitive electronic component that adds is usually between 0-2pF, but the capacitance that embeds along with the variation of operating frequency of antenna also possibly exceed the scope of 0-2pF.Certainly, also can be between first feeder line 2, second feeder line 3 and sheet metal 4 preset a plurality of spaces, in not being connected with the space of electronic component, adopt the lead short circuit.
(3) the perceptual electronic component of embedding and/or resistance are arranged in the space 6 on the metal routing 43 of sheet metal.The purpose that embeds perceptual electronic component here is the inductance value that increases sheet metal internal resonance structure, thus the effect that the resonance frequency and the bandwidth of operation of antenna played adjusting; The purpose of embedded resistor is to improve the radiation resistance of antenna here.So, then decide as required to embedding perceptual electronic component or resistance.In not embedding the space of electronic component, adopt the lead short circuit in addition.
(4) embed the capacitive electronic component in the space of on first micro groove structure 41 and second micro groove structure 42, reserving 6.Embedding capacitive electronic component can change the resonance performance of sheet metal, the Q value and the resonance working point of finally improving antenna.As common practise, we know that the relation of passband BW and resonance frequency w0 and quality factor q is: BW=wo/Q, and this formula shows that Q more greatly then passband is narrow more, the more little then passband of Q is wide more.Other has: Q=wL/R=1/wRC, and wherein, Q is a quality factor; Supply frequency when w is circuit resonance; L is an inductance; R is the resistance of string; C is an electric capacity, can be known by the Q=wL/R=1/wRC formula, and Q and C are inverse ratio, therefore, can reduce the Q value through adding the capacitive electronic component, and passband is broadened.
Dual polarized antenna of the present invention can be the same structure before not adding any element; Just through adding different electronic components at diverse location; And the difference of the parameter of electronic component (inductance value, resistance value, capacitance); Realize the performance parameter of different antennae, promptly realized versatility, therefore can significantly reduce production costs.
Said space of the present invention can be a pad, also can be a vacancy.Pad configuration can be referring to the pad on the common circuit board.Certainly, the needs that the design consideration of its size is different can be different.
In addition, among the present invention, medium substrate can be processed by ceramic material, macromolecular material, ferroelectric material, ferrite material or ferromagnetic material.Preferably, being processed by macromolecular material, can be macromolecular materials such as FR-4, F4B particularly.
Among the present invention, sheet metal is copper sheet or silver strip.Be preferably copper sheet, cheap, conduct electricity very well.
Among the present invention, first feeder line, second feeder line are selected for use with the same material of sheet metal and are processed.Be preferably copper.
Said among the present invention " asymmetrical first micro groove structure 41 and second micro groove structure 42 " is meant, both do not constitute axially symmetric structure first micro groove structure 41 and second micro groove structure 42.In other words, promptly can not find a symmetry axis, win micro groove structure 41 and second micro groove structure, 42 relative these symmetry axis are symmetrical set on a surface.
Among the present invention; Therefore first micro groove structure 41 and second micro groove structure, 42 structures are asymmetric, and two locational electric capacity can be different with inductance, thus at least two different resonance points of generation; And the difficult counteracting of resonance point, help the multimodeization that realizes that antenna is abundant.
The version of first micro groove structure 41 of the present invention and second micro groove structure 42 can be the same, also can be different.And the degree of asymmetry of first micro groove structure 41 and second micro groove structure 42 can be regulated as required.Thereby realize abundant adjustable multimode resonance.
And the present invention as required, on a slice sheet metal, more micro groove structure can also be set, so that described antenna has the different resonant more than three.
Concrete, the asymmetric situation among the present invention can have following embodiment.
Shown in Figure 1 is the structural representation of first embodiment of the invention.Fig. 2 is its another visual angle figure.In the present embodiment; As shown in Figure 1; Be in medium substrate a surface first micro groove structure 41 and second micro groove structure 42 its be opening helical ring structure; First micro groove structure 41 and second micro groove structure 42 do not communicate, but the difference of its size causes the asymmetric of the two structure, make antenna have plural at least resonance frequency.
Shown in Figure 3 is the structural representation of second embodiment of the invention.In the present embodiment; Be in medium substrate a surface first micro groove structure 41 and second micro groove structure 42 its be opening helical ring structure; And has identical size; First micro groove structure 41 and second micro groove structure 42 do not communicate, but because first micro groove structure 41 and 42 the two the locational setting of second micro groove structure cause the asymmetric of the two structure.
Shown in Figure 4 is the structural representation of third embodiment of the invention.In the present embodiment; First micro groove structure 41 that is in medium substrate a surface is complementary helix structure, and second micro groove structure 42 is an opening helical ring structure, and first micro groove structure 41 and second micro groove structure 42 do not communicate; Clearly, first micro groove structure 41 and second micro groove structure 42 are asymmetric.
In addition, in above-mentioned three embodiment, first micro groove structure and second micro groove structure can also be realized the connection of first micro groove structure and second micro groove structure through new groove of hollow out on sheet metal.Being communicated with back first micro groove structure and second micro groove structure still is unsymmetric structure, therefore, effect of the present invention is not had too much influence, equally can be so that antenna has plural at least resonance frequency.
Among the present invention,,, can adopt various manufactures as long as satisfy design principle of the present invention about the processing and manufacturing of antenna.Prevailing method is to use the manufacturing approach of all kinds of printed circuit board (PCB)s (PCB), certainly, metallized through hole, the PCB of double-sided copper-clad makes also can satisfy processing request of the present invention.Remove this processing mode; Can also introduce other manufacturing process according to the needs of reality; (RFID is the abbreviation of Radio Frequency Identification such as RFID; Be REID, be commonly called as electronic tag) but in the processing mode that makes up of processing mode and iron plate and the PCB of flexible PCB processing, iron plate antenna of employed conductive silver paste printing ink processing mode, all kinds of deformation devices.Wherein, iron plate and PCB combination processing mode is meant that the accurate processing that utilizes PCB accomplishes the processing of antenna micro groove structure, accomplishes other slave part with iron plate.In addition, can also process through etching, plating, brill quarter, photoetching, electronics is carved or ion is carved method.
The present invention also provides a kind of MIMO antenna, and described MIMO antenna is made up of a plurality of above-mentioned antennas 100.The MIMO here promptly is meant multiple-input and multiple-output.Be that all single antennas 100 on the MIMO antenna are launched simultaneously, receive simultaneously.The MIMO antenna can increase considerably the information throughput and the transmission range of system under the prerequisite that need not increase bandwidth or total transmitted power loss.MIMO antenna of the present invention in addition also has very high isolation, and the antijamming capability between a plurality of antennas is strong.
MIMO antenna of the present invention, first feeder line of its each antenna 100 is connected with a reception/transmitter, and second feeder line is connected with another reception/transmitter, and all reception/transmitters all are connected on the baseband signal processor.
Combine accompanying drawing that embodiments of the invention are described above; But the present invention is not limited to above-mentioned embodiment, and above-mentioned embodiment only is schematically, rather than restrictive; Those of ordinary skill in the art is under enlightenment of the present invention; Not breaking away under the scope situation that aim of the present invention and claim protect, also can make a lot of forms, these all belong within the protection of the present invention.
Claims (10)
1. dual polarized antenna; It is characterized in that; Said antenna comprises medium substrate, attached to the sheet metal on medium substrate one surface, be provided with first feeder line, second feeder line around sheet metal, said first feeder line and second feeder line are all through the said sheet metal of coupled modes feed-in; Hollow out has asymmetrical first micro groove structure and second micro groove structure on sheet metal, to form metal routing on the said sheet metal, and said antenna is preset with the space that electronic component embeds.
2. dual polarized antenna according to claim 1 is characterized in that, said space is arranged between first feeder line, second feeder line, first feeder line and the sheet metal, between second feeder line and the sheet metal and these five positions of sheet metal at least one on.
3. dual polarized antenna according to claim 2 is characterized in that, said space is arranged on the metal routing on the sheet metal, and perhaps said space is arranged on first micro groove structure and/or second micro groove structure.
4. according to claim 2 or 3 described dual polarized antennas, it is characterized in that said electronic component is perceptual electronic component, capacitive electronic component or resistance.
5. according to claim 2 or 3 described dual polarized antennas, it is characterized in that said space is the pad that is formed on the said antenna.
6. dual polarized antenna according to claim 4 is characterized in that the scope of said perceptual electronic component inductance value is between 0-5uH.
7. dual polarized antenna according to claim 4 is characterized in that, the scope of said capacitive electronic component capacitance is between 0-2pF.
8. ultra material radio-frequency antenna as claimed in claim 1; It is characterized in that, said first micro groove structure be a kind of in complementary split ring resonator structure, complementary helix structure, opening helical ring structure, two opening helical ring structure and the complementary folding line structure or through several kinds of structures in front derive, compound or a micro groove structure that the group battle array obtains.
9. ultra material radio-frequency antenna as claimed in claim 1; It is characterized in that, said second micro groove structure be a kind of in complementary split ring resonator structure, complementary helix structure, opening helical ring structure, two opening helical ring structure and the complementary folding line structure or through several kinds of structures in front derive, compound or a micro groove structure that the group battle array obtains.
10. a MIMO antenna is characterized in that, said MIMO antenna comprises a plurality of dual polarized antennas as claimed in claim 1.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101451692A CN102800943A (en) | 2011-05-31 | 2011-05-31 | Dual-polarized antenna and MIMO (multiple input multiple output) antenna with same |
| TW100135509A TWI502811B (en) | 2011-05-31 | 2011-09-30 | Dual polarization antenna and mimo antenna with the dual polarization antenna |
| PCT/CN2011/080416 WO2012162992A1 (en) | 2011-05-31 | 2011-09-30 | Dual-polarized antenna and mimo antenna having the dual-polarized antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2011101451692A CN102800943A (en) | 2011-05-31 | 2011-05-31 | Dual-polarized antenna and MIMO (multiple input multiple output) antenna with same |
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| CN102800943A true CN102800943A (en) | 2012-11-28 |
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| CN2011101451692A Pending CN102800943A (en) | 2011-05-31 | 2011-05-31 | Dual-polarized antenna and MIMO (multiple input multiple output) antenna with same |
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Application publication date: 20121128 |