CN106058456B - The high-isolation antenna and its MIMO communication system of compact excitation floor orthogonal radiation - Google Patents
The high-isolation antenna and its MIMO communication system of compact excitation floor orthogonal radiation Download PDFInfo
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- CN106058456B CN106058456B CN201610666575.6A CN201610666575A CN106058456B CN 106058456 B CN106058456 B CN 106058456B CN 201610666575 A CN201610666575 A CN 201610666575A CN 106058456 B CN106058456 B CN 106058456B
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- 230000005855 radiation Effects 0.000 title claims abstract description 44
- 238000002955 isolation Methods 0.000 title claims abstract description 37
- 238000004891 communication Methods 0.000 title claims abstract description 13
- 230000005284 excitation Effects 0.000 title abstract description 6
- 230000005404 monopole Effects 0.000 claims abstract description 42
- 239000002184 metal Substances 0.000 claims description 57
- 229910052751 metal Inorganic materials 0.000 claims description 57
- 239000003990 capacitor Substances 0.000 claims description 22
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 230000004936 stimulating effect Effects 0.000 claims 2
- 230000015572 biosynthetic process Effects 0.000 abstract 2
- 238000009408 flooring Methods 0.000 abstract 2
- 239000011159 matrix material Substances 0.000 abstract 2
- 238000010586 diagram Methods 0.000 description 8
- 230000005540 biological transmission Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000001808 coupling effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
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- 238000005859 coupling reaction Methods 0.000 description 1
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- 238000010295 mobile communication Methods 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/10—Resonant antennas
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Abstract
The present invention provides the high-isolation antenna and its MIMO communication system of a kind of compact excitation floor orthogonal radiation, including：One PCB floors, have clearance zone on an edge；On one loop eradiation antenna, the clearance zone for being arranged on the PCB floors, and it is connected with the non-clearance zone on the PCB floors, Liang Ge branches excitation PCB flooring radiation two resonant tanks of formation；And a symmetrical monopole antenna, it is arranged on the top of the clearance zone on the PCB floors, including feeder line, low frequency symmetric part of matrix and high-frequency symmetrical branch, the low frequency symmetric part of matrix and high-frequency symmetrical branch connect the non-clearance zone on the PCB floors, Liang Ge branches excitation PCB flooring radiation two resonance paths of formation by feeder line；Wherein, the loop eradiation antenna and symmetrical monopolar sub-antenna are orthogonal in the electric current that each band excitation PCB floors are generated.The present invention can realize that high-isolation double frequency is covered, isolation can reach more than 25dB using the orthogonality of electric current in very limited amount of space.
Description
Technical Field
The invention relates to a mobile terminal device antenna technology, in particular to a compact high-isolation antenna for exciting floor orthogonal radiation and an MIMO (Multiple-Input Multiple-Output) communication system thereof.
Background
The rapid development of mobile communication terminal services has driven the proliferation of wireless terminal antenna industry, and has also raised higher requirements for terminal antennas, requiring antennas with multi-band, small volume, high efficiency, etc. However, the transmission rate of the current wireless network cannot meet the application requirement of the current high data transmission rate, and more technologies for improving the data transmission rate are applied, MIMO is one of them, the MIMO technology is to adopt multiple antennas to realize transceiving in a wireless channel, and under the condition of not increasing the bandwidth, the capacity of a communication system can be improved by times, but the technical bottleneck of the multiple antenna system is that the coupling effect among the antennas can make the output signals among the multiple antennas have great correlation, and the transmission of the wireless signals is seriously interfered. In order to reduce the correlation between signals, it is necessary to improve the isolation between antennas in the MIMO system.
The simplest method for solving the coupling effect between the antennas is to increase the distance between the antennas, but the space of the current wireless terminal system is limited, and the coupling problem becomes more serious as the number of antennas increases.
Disclosure of Invention
The invention provides a compact high-isolation antenna for exciting orthogonal radiation of a floor and an MIMO communication system thereof, which can realize high-isolation double-frequency coverage in a very limited space by using the orthogonality of current, and the isolation can reach more than 25 dB.
To solve the above problems, the present invention provides a compact high isolation antenna for exciting orthogonal radiation of a floor, comprising:
a PCB floor having a clearance area on an edge;
the loop ground radiation antenna is arranged on the clearance area of the PCB floor and is connected with the non-clearance area of the PCB floor, and two branches of the loop ground radiation antenna excite the PCB floor to radiate to form two resonant loops; and
the symmetrical monopole antenna is arranged above a clearance area of the PCB floor and comprises a feeder line, a low-frequency symmetrical branch and a high-frequency symmetrical branch, the low-frequency symmetrical branch and the high-frequency symmetrical branch are connected with a non-clearance area of the PCB floor through the feeder line, and the low-frequency symmetrical branch and the high-frequency symmetrical branch excite the PCB floor to radiate to form two resonance paths;
and the currents generated by exciting the PCB floor by the loop ground radiation antenna and the symmetrical monopole antenna at each frequency band are orthogonal.
According to one embodiment of the invention, the low-frequency symmetrical branch and the high-frequency symmetrical branch of the symmetrical monopole antenna are positioned on the same side or different sides of the feeder line, one end of the feeder line is connected to the symmetrical line of the low-frequency symmetrical branch and the symmetrical line of the high-frequency symmetrical branch, and the other end of the feeder line is connected to the non-clearance area of the PCB floor.
According to one embodiment of the present invention, the two symmetrical sides of the low-frequency symmetrical branch are equal in length and same in shape; the symmetrical two sides of the high-frequency symmetrical branch are equal in length and same in shape.
According to one embodiment of the invention, the low-frequency symmetrical branch comprises two U-shaped metal sheets with opposite openings, the openings of the two U-shaped metal sheets are connected on one side, the high-frequency symmetrical branch comprises two straight metal sheets, and one ends of the two straight metal sheets are connected;
or the low-frequency symmetrical branch comprises two straight metal sheets, one ends of the two straight metal sheets are connected, the high-frequency symmetrical branch comprises two U-shaped metal sheets with opposite openings, and the single sides of the openings of the two U-shaped metal sheets are connected;
or the low-frequency symmetrical branch and the high-frequency symmetrical branch both comprise two straight metal sheets, and one ends of the two straight metal sheets are connected;
or the low-frequency symmetrical branch and the high-frequency symmetrical branch are respectively composed of two U-shaped metal sheets with opposite openings, and the openings of the two U-shaped metal sheets are connected on one side.
According to one embodiment of the invention, the low-frequency symmetrical branch and/or the high-frequency symmetrical branch are formed by the connection of the free ends of the uprights of two L-shaped metal sheets.
According to one embodiment of the invention, the symmetric monopole antenna is located directly above the headroom of the PCB floor.
According to one embodiment of the invention, the PCB floor is a single-sided copper-clad dielectric plate, and copper is not coated in the clearance area.
According to an embodiment of the present invention, the loop-ground radiating antenna includes:
the T-shaped conduction band branch comprises a first branch, a second branch and a third branch, wherein the first branch and the second branch form a transverse part, the third branch forms a vertical part, the first branch and the second branch extend towards two sides of the third branch, and the tail end of the first branch is connected to a non-clearance area of the PCB floor through a first lumped capacitor; the end of the second branch is connected to the non-clearance area of the PCB floor through a second lumped capacitor;
one end of the fourth branch is connected to the third branch, the other end of the fourth branch is connected to a non-clearance area of the PCB floor, and a feed source is connected with the joint of the fourth branch and the non-clearance area of the PCB floor;
the fourth branch, the third branch, the first lumped capacitor and a non-clearance area of the PCB floor form a first resonant circuit, and the fourth branch, the third branch, the second lumped capacitor and the non-clearance area of the PCB floor form a second resonant circuit.
According to an embodiment of the present invention, the loop ground radiation antenna further comprises a fifth branch, one end of the fifth branch is connected to the end of the third branch, and the other end of the fifth branch is connected to the non-clearance area of the PCB floor through a third lumped capacitor; and the fourth branch, the fifth branch, the third lumped capacitor and a non-clearance area of the PCB floor form a matching loop.
According to one embodiment of the present invention, both the loop-ground radiating antenna and the symmetric monopole antenna reduce or add corresponding branches, thereby forming a single frequency resonance or a multiple frequency resonance, respectively.
The invention also provides a MIMO communication system comprising a compact, highly isolated antenna for exciting floor orthogonal radiation as described in any of the preceding embodiments.
After the technical scheme is adopted, compared with the prior art, the invention has the following beneficial effects:
a small block of clearance loading loop ground radiation antenna on a PCB floor is utilized to drive the PCB floor to radiate so as to realize double-frequency coverage, meanwhile, a symmetrical monopole antenna is adopted to drive the PCB floor to radiate so as to realize double-frequency coverage, floor radiation currents excited by the two modes are just orthogonal, the isolation of the two antennas is improved, under the condition that the space of a wireless terminal is limited, high-isolation double-frequency coverage is realized in a very limited space by utilizing the orthogonality of the currents, the isolation can reach more than 25dB, and the communication capacity of an MIMO communication system can be effectively improved.
Drawings
FIG. 1 is a schematic diagram of a compact, high isolation antenna for exciting orthogonal radiation from a floor according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a loop ground radiating antenna according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a symmetric monopole antenna according to an embodiment of the invention;
FIG. 4 is a return loss schematic of a looped ground radiating antenna of an embodiment of the present invention;
FIG. 5 is a return loss schematic of a symmetric monopole antenna according to an embodiment of the invention;
FIG. 6 is a schematic diagram of the isolation of a loop ground radiating antenna and a symmetric monopole antenna of an embodiment of the present invention;
FIG. 7 is a graph of the radiation efficiency of a loop ground radiating antenna and a symmetric monopole antenna of an embodiment of the present invention;
fig. 8 and 9 are floor current distribution diagrams of 2.45GHz and 5.5GHz frequency points of a loop ground radiation antenna according to an embodiment of the present invention;
FIGS. 10 and 11 are floor current distribution diagrams of symmetric monopole antennas with frequency points of 2.45GHz and 5.5GHz, respectively, according to an embodiment of the present invention;
fig. 12 is a schematic structural diagram of a symmetric monopole antenna according to another embodiment of the invention;
fig. 13 is a schematic structural view of a symmetric monopole antenna according to yet another embodiment of the invention;
fig. 14 is a schematic structural diagram of a symmetric monopole antenna according to still another embodiment of the invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, but rather construed as limited to the embodiments set forth herein.
Referring to fig. 1, the compact high isolation antenna for exciting orthogonal radiation of a floor of the present embodiment includes: a Printed Circuit Board (PCB) floor 1, a loop ground radiating antenna 2 and a symmetrical Monopole (Monopole) antenna 3.
The PCB floor 1 has a clearance area on one edge thereof, which means a non-conductive material covered area, and preferably all the clearance area except the clearance area is a non-clearance area. The clearance area may be sized to accommodate a looped ground radiating antenna. The shape of the PCB floor 1 may be rectangular, square, or polygonal, and the shape of the clearance area may be rectangular, square, or polygonal, and the like, and is not limited specifically.
The loop ground radiation antenna 2 is arranged on a clearance area of the PCB floor 1 and is connected with a non-clearance area of the PCB floor 1, and two resonant loops are formed by exciting the PCB floor 1 to radiate through two different branches in two frequency bands. That is, the loop ground radiation antenna 2 and the PCB floor 1 form a resonant circuit together, and the dual-frequency resonance is realized under the driving of two different frequency point signals.
The symmetrical monopole antenna 3 is arranged above a clearance area of the PCB floor 1 and comprises a feeder line, a low-frequency symmetrical branch and a high-frequency symmetrical branch. The low-frequency symmetrical branch and the high-frequency symmetrical branch are connected with a non-clearance area of the PCB floor 1 through feeder lines, and in two frequency bands, the PCB floor 1 is excited to radiate through the two branches of the low-frequency symmetrical branch and the high-frequency symmetrical branch to form two resonance paths. That is, the symmetrical monopole antenna 3 excites the same PCB floor 1 to form a resonant channel under the driving of the signal of the same frequency band as the loop ground radiation antenna 2, and realizes another dual-frequency resonance at two frequency points.
The currents generated by exciting the PCB floor at each frequency band by the loop ground radiation antenna and the symmetrical monopole antenna are orthogonal, and the loop ground radiation antenna 2, the symmetrical monopole antenna 3 and the PCB floor 1 form a high-isolation double-frequency antenna. In other words, the loop ground radiation antenna 2 and the symmetric monopole antenna 3 respectively excite the PCB floor 1 to form dual-frequency resonance, and the currents of the two antennas at the respective frequency resonances are just orthogonal to each other, so that the isolation of the dual-frequency resonances of the two antennas is high.
The specific structure of the loop ground radiating antenna 2 and the symmetric monopole antenna 3 may be designed or adjusted as desired. The loop ground radiation antenna 2 is arranged on the surface of the clearance area of the PCB floor 1, the floor 1 is excited to form double-frequency resonance, the symmetrical monopole antenna 3 is arranged above the clearance area of the PCB floor 1, the floor 1 is excited to form double-frequency resonance, and the resonance currents of the two antennas are orthogonal. There is no direct contact between the loop ground radiating antenna 2 and the symmetric monopole antenna 3.
In a specific embodiment, referring to fig. 2, the loop ground radiating antenna may include: a T-shaped conduction band branch including a first branch 23 and a second branch 24 constituting a lateral portion, a third branch 25 constituting a vertical portion, the first branch 23 and the second branch 24 extending to both sides of the third branch 25, and an end of the first branch 23 connected to a non-clearance area of the PCB floor 1 through a first lumped capacitor 51; the end of the second branch 24 is connected to the non-clearance area of the PCB floor 1 via a second lumped capacitor 52; and the fourth branch 21 has one end connected to the third branch 25 and the other end connected to the non-clearance area of the PCB floor 1, and the feed source 4 is connected to the connection part of the non-clearance area of the PCB floor 1. The fourth branch 21, the third branch 25, the first branch 23, the first lumped capacitor 51 and the non-clearance area of the PCB floor 1 form a first resonant circuit, and the fourth branch 21, the third branch 25, the second branch 24, the second lumped capacitor 52 and the non-clearance area of the PCB floor 1 form a second resonant circuit.
The first branch 23 and the second branch 24 are disposed along an outer side of a clearance area of the PCB floor 1, and the first branch 24 and the second branch 24 are all along the clearance area. The fourth branch 21 is connected to a non-clearance area of the PCB floor 1 at the left or right side of the third branch 25.
Further, the loop ground radiating antenna comprises a fifth branch 22. One end of the fifth branch 22 is connected to the end of the third branch 25 and the other end is connected to the non-clearance area of the PCB floor 1 through a third lumped capacitor 53; the fourth branch 21, the fifth branch 22, the third lumped capacitor 53 and the non-headroom region of the PCB floor 1 constitute a matching loop.
The connection between the fifth branch 22 and the fourth branch 21 is preferably in a U-shaped configuration. The fifth branch 22 may be arranged along the extension of the third branch 25.
The first lumped capacitor 51 and the fourth branch 21, the first branch 23 and the third branch 25 are adjusted to tune the frequency to resonate in the first resonant frequency band. The second lumped capacitor 52 and the fourth, second and third branches 21, 24, 25 are tuned to resonate in the second resonant frequency band. The fourth branch 21, the fifth branch 22 and the third lumped capacitor 53 form a matching loop, and the resonant depths of the first resonant frequency band and the second resonant frequency band can be adjusted by adjusting the third lumped capacitor 53, the fourth branch 21 and the fifth branch 22.
The low-frequency symmetrical branch and the high-frequency symmetrical branch of the symmetrical monopole antenna 3 can be positioned at the same side or different sides of the feeder line, one end of the feeder line is connected to the symmetrical line of the low-frequency symmetrical branch and the symmetrical line of the high-frequency symmetrical branch, and the other end of the feeder line is connected to the non-clearance area of the PCB floor.
The low-frequency symmetrical branch comprises two U-shaped metal sheets with opposite openings, the openings of the two U-shaped metal sheets are connected on one side, the high-frequency symmetrical branch comprises two straight metal sheets, and one ends of the two straight metal sheets are connected;
in one embodiment, referring to fig. 1 and 3, the symmetric monopole antenna 3 is disposed above the clearance zone, specifically directly above the loop-ground radiating antenna 2, and the low frequency symmetric branch 31 and the high frequency symmetric branch 32 are disposed on the same side of the feed line 33. The low-frequency symmetrical branch 31 comprises two U-shaped metal sheets with opposite openings, and the openings of the two U-shaped metal sheets are connected at one side; the high-frequency symmetrical branch 32 comprises two straight metal pieces, and one ends of the two straight metal pieces are connected. The symmetry lines of the low frequency symmetric branch 31 and the high frequency symmetric branch 32 are parallel to the third branch 25 of the loop ground radiating antenna. The opening single sides of the two U-shaped metal sheets are connected, namely, after the two U-shaped metal sheets are oppositely arranged, the same sides of the two openings are connected, and the other sides of the two openings are not connected.
In another embodiment, referring to fig. 12, the symmetric monopole antenna 3b is disposed above the clearance zone, specifically directly above the loop-ground radiating antenna 2, and the low-frequency symmetric branch 31b and the high-frequency symmetric branch 32b are disposed on opposite sides of the feed line 33 b. The low-frequency symmetrical branch 31b comprises two U-shaped metal sheets with opposite openings, and the openings of the two U-shaped metal sheets are connected at one side; the high-frequency symmetrical branch 32b includes two straight metal pieces, and one ends of the two straight metal pieces are connected. The symmetry line of the low-frequency symmetric branch 31b and the high-frequency symmetric branch 32b is parallel to the third branch 25 of the loop ground radiation antenna 2.
In a further embodiment, with reference to fig. 13, the symmetric monopole antenna 3c is disposed above the clearance zone, in particular directly above the loop-ground radiating antenna 2, and the low-frequency symmetric branch 31c and the high-frequency symmetric branch 32c are disposed on opposite sides of the feed line 33 c. The low frequency symmetrical branch 31c may include two straight metal plates connected at one end, and the high frequency symmetrical branch 32c is formed by two U-shaped metal plates with opposite openings connected at one side of the openings. The symmetry line of the low-frequency symmetric branch 31c and the high-frequency symmetric branch 32c is parallel to the third branch 25 of the loop ground radiation antenna 2.
In a further embodiment, with reference to fig. 14, the symmetrical monopole antenna 3a is located above the clearance zone, in particular directly above the loop-ground radiating antenna 2, the low-frequency symmetrical branch 31a and the high-frequency symmetrical branch 32a being arranged on the same side of the feed line 33 a. The low-frequency symmetrical branch 31a and the high-frequency symmetrical branch 32a each include two straight metal pieces, and one ends of the two straight metal pieces are connected. The symmetry line of the low-frequency symmetric branch 31a and the high-frequency symmetric branch 32a is parallel to the third branch 25 of the loop ground radiation antenna 2.
Of course, there may be more shapes. The low-frequency symmetrical branch and the high-frequency symmetrical branch can also be two U-shaped metal sheets with opposite openings, and the openings of the two U-shaped metal sheets are connected on one side. Alternatively, the low-frequency symmetrical branch and/or the high-frequency symmetrical branch of the previous embodiment are formed by connecting the free ends of the vertical parts of the two L-shaped metal sheets.
The low-frequency symmetrical branch and the high-frequency symmetrical branch are connected at the location of the point of symmetry and are connected to the feed line. The shapes and sizes of the two symmetrical sides of the low-frequency symmetrical branch and the high-frequency symmetrical branch are not limited, and may be changed on the basis of the foregoing embodiment, for example, the U shape may be replaced by a V shape, so long as the two symmetrical sides of the low-frequency symmetrical branch are equal in length and same in shape; the symmetrical two sides of the high-frequency symmetrical branch are equal in length and same in shape.
Preferably, the symmetric monopole antenna is located directly above the clearance zone of the PCB floor.
Preferably, the PCB floor can be a single-sided copper-clad dielectric plate, and copper is not clad in the clearance area. Certainly, the PCB substrate may also be a dielectric board with a single surface covered by other conductive layers, and the clearance area is not covered by the other conductive layers.
The embodiment of the invention is not limited to a dual-frequency antenna, and a single-frequency antenna or a multi-frequency antenna can be formed. The loop ground radiation antenna and the symmetric monopole antenna each reduce or add a corresponding branch, thereby forming a single frequency resonance or a multiple frequency resonance, respectively. The number, structure and position of the corresponding branches can be reduced or increased according to actual needs, and are not particularly limited.
A high isolation dual band antenna is designed according to an embodiment of the invention. Referring to fig. 4, the return loss of the loop ground radiation antenna is referenced to a return loss of-4.5 dB, and the low frequency bandwidth covers 2300MHz to 2500MHz and the high frequency covers 5120MHz to 5860 MHz. Referring to fig. 5, the return loss of the symmetrical monopole antenna takes a return loss of-5 dB as a reference point, the low-frequency bandwidth covers 2320MHz to 2500MHz, and the high-frequency covers 5000MHz to 5960 MHz. Referring to fig. 6, the isolation between the two antennas can reach more than 25dB in the low frequency 2320MHz to 2500MHz range, and can reach more than 28dB in the high frequency 5000MHz to 5960MHz range. Referring to fig. 7, the radiation efficiency of both antennas has better radiation efficiency. Fig. 8-9 show the current distribution on the floor with frequency points of 2.45GHz and 5.5GHz of the loop ground radiation antenna, fig. 10-11 show the current distribution on the floor with frequency points of 2.45GHz and 5.5GHz of the symmetric monopole antenna, and it can be seen from the figure that, for the symmetric monopole antenna, the currents on the branches 31 and 32 are reversed, so that the two branches do not radiate electromagnetic waves, and they function to excite the floor to radiate, and at the frequency point of 2.45GHz, we see that the currents on the floor excited by the loop ground radiation antenna and the symmetric monopole antenna are just orthogonal, so the isolation is better, and similarly, the currents on the floor with frequency point of 5.5GHz are just orthogonal, and the isolation is also better.
The invention also provides a MIMO communication system comprising a compact, highly isolated antenna for exciting floor orthogonal radiation as described in any of the preceding embodiments.
The embodiment of the invention utilizes a small block of clearance loading loop ground radiation antenna on the PCB floor to drive the PCB floor to radiate so as to realize double-frequency coverage, and simultaneously adopts the symmetrical monopole antenna to drive the PCB floor to radiate so as to realize the double-frequency coverage, the floor radiation currents excited by the two modes are just orthogonal, the isolation of the two antennas is improved, under the condition that the space of the wireless terminal is limited, the high-isolation double-frequency coverage is realized in a very limited space by utilizing the orthogonality of the currents, the isolation can reach more than 25dB, and the communication capacity of an MIMO communication system can be effectively improved.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the scope of the claims, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the invention.
Claims (11)
1. A compact, high isolation antenna for stimulating orthogonal radiation in a floor, comprising:
a PCB floor having a clearance area on an edge;
the loop ground radiation antenna is arranged on the clearance area of the PCB floor and is connected with the non-clearance area of the PCB floor, and two branches of the loop ground radiation antenna excite the PCB floor to radiate to form two resonant loops; and
the symmetrical monopole antenna is arranged above a clearance area of the PCB floor and comprises a feeder line, a low-frequency symmetrical branch and a high-frequency symmetrical branch, the low-frequency symmetrical branch and the high-frequency symmetrical branch are connected with the non-clearance area of the PCB floor through the feeder line, and the PCB floor is excited to radiate through the two branches of the low-frequency symmetrical branch and the high-frequency symmetrical branch to form two resonant paths;
and the currents generated by exciting the PCB floor by the loop ground radiation antenna and the symmetrical monopole antenna at each frequency band are orthogonal.
2. The compact high isolation antenna for exciting orthogonal radiation of a floor as claimed in claim 1, wherein the low frequency symmetrical branch and the high frequency symmetrical branch of the symmetrical monopole antenna are located on the same side or different sides of the feeder, one end of the feeder is connected to the symmetrical line of the low frequency symmetrical branch and the symmetrical line of the high frequency symmetrical branch, and the other end is connected to the non-clearance area of the PCB floor.
3. The compact, floor-excited, quadrature radiating, high isolation antenna of claim 1, wherein said low frequency symmetric branches have equal length and shape on both sides; the symmetrical two sides of the high-frequency symmetrical branch are equal in length and same in shape.
4. The compact, floor quadrature radiating, high isolation antenna of claim 3, wherein said low frequency symmetrical branch comprises two U-shaped metal pieces with opposite openings, and the openings of the two U-shaped metal pieces are connected at one side, and said high frequency symmetrical branch comprises two straight metal pieces, and one ends of the two straight metal pieces are connected;
or the low-frequency symmetrical branch comprises two straight metal sheets, one ends of the two straight metal sheets are connected, the high-frequency symmetrical branch comprises two U-shaped metal sheets with opposite openings, and the single sides of the openings of the two U-shaped metal sheets are connected;
or the low-frequency symmetrical branch and the high-frequency symmetrical branch both comprise two straight metal sheets, and one ends of the two straight metal sheets are connected;
or the low-frequency symmetrical branch and the high-frequency symmetrical branch both comprise two U-shaped metal sheets with opposite openings, and the openings of the two U-shaped metal sheets are connected on one side.
5. The compact, floor-excited, quadrature radiating, high isolation antenna of claim 3, wherein said low frequency symmetric branch and said high frequency symmetric branch are each formed by joining the free ends of the uprights of two L-shaped metal sheets;
or,
the low-frequency symmetrical branch is formed by connecting the free ends of the vertical parts of two L-shaped metal sheets; the high-frequency symmetrical branch comprises two straight metal sheets, one ends of the two straight metal sheets are connected, or the high-frequency symmetrical branch comprises two U-shaped metal sheets with opposite openings, and the single sides of the openings of the two U-shaped metal sheets are connected;
or,
the high-frequency symmetrical branch is formed by connecting the free ends of the vertical parts of two L-shaped metal sheets; the low-frequency symmetrical branch comprises two straight metal sheets, one ends of the two straight metal sheets are connected, or the low-frequency symmetrical branch comprises two U-shaped metal sheets with opposite openings, and the single sides of the openings of the two U-shaped metal sheets are connected.
6. The compact excited floor quadrature radiating high isolation antenna as claimed in claim 1, wherein said symmetric monopole antenna is located directly above the headroom of said PCB floor.
7. The compact floorexcited orthogonal-radiation high-isolation antenna of claim 1, wherein the PCB floor is a single-sided copper-clad dielectric board and no copper is clad in the clearance area.
8. The compact, floor-excited, orthogonal radiating high isolation antenna as recited in claim 1, wherein the loop-ground radiating antenna comprises:
the T-shaped conduction band branch comprises a first branch, a second branch and a third branch, wherein the first branch and the second branch form a transverse part, the third branch forms a vertical part, the first branch and the second branch extend towards two sides of the third branch, and the tail end of the first branch is connected to a non-clearance area of the PCB floor through a first lumped capacitor; the end of the second branch is connected to the non-clearance area of the PCB floor through a second lumped capacitor;
one end of the fourth branch is connected to the third branch, the other end of the fourth branch is connected to a non-clearance area of the PCB floor, and a feed source is connected with the joint of the fourth branch and the non-clearance area of the PCB floor;
the fourth branch, the third branch, the first lumped capacitor and a non-clearance area of the PCB floor form a first resonant circuit, and the fourth branch, the third branch, the second lumped capacitor and the non-clearance area of the PCB floor form a second resonant circuit.
9. The compact high isolation antenna for stimulating orthogonal radiation in a floor as recited in claim 8, wherein said loop ground radiating antenna further comprises a fifth branch, one end of said fifth branch is connected to the end of the third branch, and the other end is connected to the non-clearance area of the PCB floor through a third lumped capacitor; and the fourth branch, the fifth branch, the third lumped capacitor and a non-clearance area of the PCB floor form a matching loop.
10. The compact, floor-excited, quadrature radiating high isolation antenna as claimed in claim 1, wherein the loop-ground radiating antenna and the symmetric monopole antenna each have reduced or increased corresponding branches to form a single frequency resonance or a multiple frequency resonance, respectively.
11. A MIMO communication system comprising a compact, floor-excited, orthogonal radiating, high isolation antenna as claimed in any of claims 1 to 9.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610666575.6A CN106058456B (en) | 2016-08-12 | 2016-08-12 | The high-isolation antenna and its MIMO communication system of compact excitation floor orthogonal radiation |
| PCT/CN2016/108795 WO2018028101A1 (en) | 2016-08-12 | 2016-12-07 | Compact-type high-isolation antenna for exciting orthogonal radiation of floor, and mimo communication system thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20220399907A1 (en) * | 2021-06-11 | 2022-12-15 | Wistron Neweb Corp. | Antenna structure |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018028101A1 (en) * | 2016-08-12 | 2018-02-15 | 上海安费诺永亿通讯电子有限公司 | Compact-type high-isolation antenna for exciting orthogonal radiation of floor, and mimo communication system thereof |
| CN106252848B (en) * | 2016-08-30 | 2020-01-10 | 上海安费诺永亿通讯电子有限公司 | Compact high-isolation antenna |
| CN107681261B (en) * | 2017-09-07 | 2021-01-26 | 深圳市盛路物联通讯技术有限公司 | Antenna device and wireless communication apparatus |
| CN108493600B (en) * | 2018-04-08 | 2024-01-16 | 深圳市信维通信股份有限公司 | 5G MIMO antenna structure |
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| CN109888477B (en) * | 2019-03-01 | 2023-12-19 | 深圳市信维通信股份有限公司 | Dual-frequency dual-polarized MIMO antenna system applied to 5G communication and mobile terminal |
| CN110518339B (en) * | 2019-08-23 | 2024-10-18 | 信维创科通信技术（北京）有限公司 | Low-frequency antenna structure and mobile device |
| CN114447595B (en) * | 2022-01-13 | 2023-03-21 | 西安电子科技大学 | Double-port-ring antenna with zero clearance and high isolation characteristics and mobile terminal equipment |
| CN115000675A (en) * | 2022-06-06 | 2022-09-02 | 青岛海信移动通信技术股份有限公司 | WiFi6E antenna and terminal equipment |
| CN116417794B (en) * | 2023-04-02 | 2024-07-19 | 深圳汉阳天线设计有限公司 | High-isolation MIMO antenna |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102832452A (en) * | 2012-09-18 | 2012-12-19 | 桂林电子科技大学 | High-isolation double-unit MIMO (multiple input multiple output) antenna array |
| CN104300211A (en) * | 2013-07-17 | 2015-01-21 | 中兴通讯股份有限公司 | A MIMO antenna, a terminal and a method for improving the isolation of the MIMO antenna |
| CN104393407A (en) * | 2014-11-18 | 2015-03-04 | 浙江大学 | Metamaterial-based small dual-frequency MIMO antennas |
| CN104795628A (en) * | 2015-04-07 | 2015-07-22 | 上海安费诺永亿通讯电子有限公司 | Terrestrial radiation antenna realizing double-frequency resonance by clearance of PCB (printed circuit board) |
-
2016
- 2016-08-12 CN CN201610666575.6A patent/CN106058456B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102832452A (en) * | 2012-09-18 | 2012-12-19 | 桂林电子科技大学 | High-isolation double-unit MIMO (multiple input multiple output) antenna array |
| CN104300211A (en) * | 2013-07-17 | 2015-01-21 | 中兴通讯股份有限公司 | A MIMO antenna, a terminal and a method for improving the isolation of the MIMO antenna |
| CN104393407A (en) * | 2014-11-18 | 2015-03-04 | 浙江大学 | Metamaterial-based small dual-frequency MIMO antennas |
| CN104795628A (en) * | 2015-04-07 | 2015-07-22 | 上海安费诺永亿通讯电子有限公司 | Terrestrial radiation antenna realizing double-frequency resonance by clearance of PCB (printed circuit board) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20220399907A1 (en) * | 2021-06-11 | 2022-12-15 | Wistron Neweb Corp. | Antenna structure |
| US11824568B2 (en) * | 2021-06-11 | 2023-11-21 | Wistron Neweb Corp. | Antenna structure |
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